BBC Master mods and improvememts

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On the final BBC Master 128 video, it's time to upgrade and mod this machine. From never done before mods to awesome bang for your buck mods, let's get to working on this awesome machine and see what I can do with it!
Part 1: • BBC Master 128: The ev...
Part 2: • Refurbishing the BBC M...
Part 3: This part!
0:00 Intro
3:29 SD card interface
21:20 Color composite mod
33:12 Setting the SD card to auto boot
37:02 Reading the mystery EPROM
37:41 NTSC conversion
48:38 Adding a switch to disable color
49:29 10 year no-leak NVRAM
1:00:40 Final testing and outro
--- Video Links
MMFS Github:
github.com/hoglet67/MMFS
The Future was 8-bit SD card interface:
www.thefuturewas8bit.com/sd2b...
To find the SD card interface I used, search for:
"arduino sd card module" (I think any of this can be made to work)
Necroware's RU-vid Channel:
/ @necro_ware
Necroware's DS1287 Replacement:
github.com/necroware/nwX287
OzRetroComp (Tony's channel)
www.youtube.com/@OzRetrocomp/...
Stardot Forums, the best place for BBC Micro/Master information:
stardot.org.uk/forums/
BBC Master 128 Schematics:
stardot.org.uk/forums/viewtop...
BBC Master:
en.wikipedia.org/wiki/BBC_Master
Performing a CMOS reset on the BBC Master:
lionels.orpheusweb.co.uk/Comp...
Adrian's Digital Basement Merch store:
my-store-c82bd2-2.creator-spr...
Adrian's Digital Basement ][ (Second Channel)
/ @adriansdigitalbasement2
Support the channel on Patreon:
/ adriansdigitalbasement
-- Tools
Deoxit D5:
amzn.to/2VvOKy1
store.caig.com/s.nl/it.A/id.16...
O-Ring Pick Set: (I use these to lift chips off boards)
amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
www.rigolna.com/products/digi...
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
amzn.to/2wG4tlP
www.aliexpress.com/item/33000...
TS100 Soldering Iron:
amzn.to/2K36dJ5
www.ebay.com/itm/TS100-65W-MI...
EEVBlog 121GW Multimeter:
www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
amzn.to/2RDSDQw
www.ebay.com/itm/USB-Logic-DS...
Magnetic Screw Holder:
amzn.to/3b8LOhG
www.harborfreight.com/4-inch-...
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
www.ebay.com/itm/14-16-18-20-...
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
www.retrotink.com/
Plato (Clone) Side Cutters: (order five)
www.ebay.com/itm/1-2-5-10PCS-...
Heat Sinks:
www.aliexpress.com/item/32537...
Little squeezy bottles: (available elsewhere too)
amzn.to/3b8LOOI
--- Links
My GitHub repository:
github.com/misterblack1?tab=r...
Commodore Computer Club / Vancouver, WA - Portland, OR - PDX Commodore Users Group
www.commodorecomputerclub.com/
--- Instructional videos
My video on damage-free chip removal:
• How to remove chips wi...
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino

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Опубликовано:

11 июл 2024

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Комментарии : 393

@adriansdigitalbasement Год назад

Hi everyone, my patrons pointed a small error in my video with regards to color composite. In the video, I said connected the color signal between R118 and R130 (Effectively the base of Q12) and ran that to another resistor that was effectively the base of Q13. As I mentioned in the video, to do this mod, what you actually need to do is connect a capacitor between the emitter of Q12 to the base of Q13 using a capacitor. The capacitor I installed in the video was actually connected to R137 (the emitter of Q12) and went to R151 (base of Q13.) Both of these resistors are BROWN BLACK RED GOLD, which are 1K resistors, so if you replicate the resistor as shown in the video, it will work. Here's a picture of the mod: imgur.com/a/nVUQfdC

@technerd9655 Год назад

I don't understand why this mod was necessary. Wouldn't the OSSC convert the PAL signal form the RF modulator to standard HDMI?

@adriansdigitalbasement Год назад

@@technerd9655 OSSC only has a SCART and VGA (RGB) input.

@essemque Год назад

Just paused @30:20 and scrolled down to the comments to point this out; glad you already caught it. :)

@CandyGramForMongo_ Год назад

“If you’re watching this video in the future…” I’m not sure how I would watch it any other way, Adrian. ;)

@nahumgardner Год назад

Maybe somebody in the 16th century is watching this, like the haunted BBC in the Dodleston story

@MattSiegel Год назад

some of us retro enthusiasts are stuck in the past!

@thewi2kbug Год назад

perhaps the time jump features can allow people to watch and mod thier owns.

@MrKurtHaeusler Год назад

Dunno bout you but I’m watching it in the present 🤷‍♂️

@paul_boddie Год назад

@@nahumgardner Relax: he doesn't have Edword installed!

@billraty14 Год назад

I am always impressed that Adrian laughs when he is frustrated by something instead of getting upset.

@AOClaus 8 месяцев назад

If only the entire world could figure that out.

@GDLarcade Год назад

This might be my favorite non-Commodore Adrian's Digital Basement video to date. I can't really explain why. It just had everything I like about your videos in spades, passion for the hobby, solving technical puzzles and being able to relate what you are doing to the audience well. Thank you!

@adriansdigitalbasement Год назад

Thanks for the kind words! Yeah it's hard for us in North America to relate to this machine since none of us every used it (or even knew much about it.) It's just been really fun playing around with it and learning more about it and I hope to share some of that with my viewers.

@sertacpamukcu Год назад

I'm watching Adrian's videos for a long time but this was one of the best. I really appreciated. Thanks.

@dr_jaymz Год назад

I think I agree. I really don't know what it is, I love watching these videos and I love the BBC, always have, always will. Its one of the best thought out machines I think there has ever been. Part of the reason is that the BBC wanted functionality to triumph over the penny pinching.

@jkdsteve Год назад

I grew up on Model B :D My favorite mod was the aftermarket NVRAM board that you could flash BBC ROMs into or add additional, switchable physical ROMS.

@raybarker Год назад

If I recall correctly, although MOS 3.5 has several bugfixes, it is even less compatible with BBC Model B software than the standard version. For maximum compatibility, an OS downgrade to something like 1.20 is necessary. It's a relatively common mod to have a large EEPROM with several versions of the MOS which are switched out with a hardware toggle or rotary switch picking which banks get switched in and out.

@zoid9969 Год назад

IIRC, the weird characters you see loading games (e.g. Arkanoid) occur because the Master has a different character set to the Model B, and the games were originally written for the Model B. The explanation of the parameters for the "TV" configuration now finally make sense after decades of me not knowing exactly how they work. It seems so simple now - it's a signed integer!

@thewelder3538 Год назад

This is NOT correct at all. The weird characters are caused by the address space being different on the Master than the BBC B. For instance the expanded character set on the BBC B, with say a tape filling system lived at Page &C00. So code for the BBC B used to directly load into that page. The sound and envelopes were pages &800 and &A00 etc, so rather than defining the envelopes, you would directly load into those pages. On the Master, those pages don't contain the character definitions anymore, so code that directly loaded into those pages doesn't work and that's why you're seeing weird characters because the graphics are loaded there, but the Master isn't using those pages for graphics.

@TheEulerID Год назад

BBC basic was largely written by the same person responsible for the original ARM instruction set.

@marillionuk Год назад

Roger (Sophie) Wilson wrote BBC Basic and with Steve Furber, both developed ARM. Credit to these two individuals.

@TheEulerID Год назад

@@marillionuk I was very specific in referring only the to the design of the ISA, not the design of the processor overall.

@ukwebb Год назад

glad to see you like my schematic re-drawing :)

@stewartskardon7376 Год назад

Hi Adrian. The EPROM that you removed may contain NFS (network filing system) which is needed in order to use the Econet interface.

@kwanchan6745 Год назад

doesn't the bbc master have a megarom that contained all the rom images, including ADFS and DFS ? wasn't NFS part of the DFS like the DNFS 1.20 ?

@ukwebb Год назад

@@kwanchan6745 no - its a separate chip. I never understood why they didnt include it , but they didn't

@ukwebb Год назад

You can see when he downloads the image from teh chip theres no actual code just gibberish/ random data.

@andyjdhurley Год назад

@@ukwebb correct, it certainly wasn't a language rom as, by design, they have to have an identifier at the top in readable text which gets displayed by *ROMS. The lack of any such identifier means it would not be recognised by the system. It could be some kind of game data but I doubt that. Most likey just a spare rom that was kept there for safe keeping.

@ukwebb Год назад

@@andyjdhurley same for service roms ;) it identifies a rom as being ' of interest' by looking for the copyright header '[null](C)' which must start at the offset position recorded in the 8th byte (x0007) in the rom.

@miscbits6399 Год назад

Fun fact: There are (were) 625-line 50Hz NTSC broadcast standards in some countries along with 525-line 60Hz PAL in others

@necro_ware Год назад

Great video, as always! Thank you for mentioning and I'm glad to see that my project was useful. I guess, I can add the information you have found to the documentation. Thank you for the contribution ;)

@kwanchan6745 Год назад

that is cool being able to replace the NVRAM chip, that has been a persistant pain for many bbc master owners (bbc micros don't have NVRAM)

@adriansdigitalbasement Год назад

Yeah I was frankly shocked when I saw everyone suggesting to replace the batteries and more AA batteries and then add a diode and resistor. I thought there had to be a better way!

@kwanchan6745 Год назад

@@adriansdigitalbasement the original battery arrangement was definately handled by the B-team, as it didn't even have the diode/resistor arrangement, resulting in exploding battery packs

@OtterlyInsane Год назад

Be interesting to do a PiTube on it to explore all the coprocessor options

@MrRobbiepee Год назад

I was thinking that. One of the options is an 80186 DOS compatible, which looks pretty interesting

@digitalarchaeologist5102 Год назад

I grew up in the UK so remember the BBC Micro and relatives being so ubiquitous in schools and around 6 months ago acquired a BBC Model B in Australia where I live now, unsurprisingly it originated from a school. Finally got round to renovating it after finishing other projects and this series just happened to coincide quite nicely. It's been quite a joy to discover how advanced they were for their time compared to their contemporaries although they would have cost a lot more than a Spectrum, C64 or Electron. In many ways it quite sad how progressive the UK was in the 80s and very early 90s with computing and then, well nothing... I guess ARM being an exception...

@crashoverride328 Год назад

ARM being Acorn Risc Machine in the era of the Acorn Archimedes A3xx and A4xx first generation machines, then the name evolved and the processor became the heart of a majority of tech globally since from Apple to Arduino etc. But let's not forget the Raspberry Pi machines and the RP2040 as used in the Pi Pico...

@jkdsteve Год назад

My Model B was 349 UKP (from memory).....though I may have received a 50 discount. Add 49 quid for an old TV, how I lusted after a Microvitec CUB :D

@crashoverride328 Год назад

@@jkdsteve I'm guessing it was later than 1984 or didn't have the Disk Interface...

@me_fault Год назад

In the first evaluation boards ARM1 ran as a co-processor in a BBC Micro.

@jkdsteve 11 месяцев назад

@@crashoverride328 Yes, I was on tape for quite a while, so relieved when I added a (Cumana?) drive some time later.

@GeorgeStyles Год назад

8k roms worked fine in Beebs. Instead of being mapped from $8000-$C000 they showed up as 2 copies of the 8k at $8000 and $A000, and the software was written within the 8k, so ignored the address space above $A000. This is because on 27128's all 14 (i think) address lines were used to select which byte in the rom was accessed, whereas on 2764's the highest address line was not connected, making it repeat its contents into the 2nd 8k bank in the memory map. Some roms (Quest paint for example) even included a Nintendo NES style 'mapper' chip that detected activity on a 'magic' address, and switched between 2 27128's, giving a total of 32K of rom. ah, memories :) edit: would love to see you read that unknown 8k you pulled out - you seem to have the right kit to do so, or you can also use utilities on the machine itself to read it. Maybe its just been exposed to too much UV light over the years and has wiped itself?? Were you also aware that Masters had sideways ram, so you can load images of roms into it (using *SWLOAD I think) and they will behave like actual physical roms. Cant remember if the master had battery backup tho, so u did the right think blowing the eprom for your filesystem driver

@thewelder3538 Год назад

It's not SWLOAD, it's *SRLOAD followed by the slot number and optional load and execution address. The Master did indeed have battery backup, but it wouldn't retain ROMs loaded into Sideways RAM. Also a full hard reset, so say a *FX200,2 and break would also clear out your sideways RAM.

@Nukle0n Год назад

"explaining tax" is definitely real. People make more mistakes while on camera and interacting indirectly with the audience.

@jamesfmilne Год назад

Instant upvote for working on a BBC Master. Thanks from London!

@skonkfactory Год назад

The Commodore 1084 is actually a Philips CM8833, which was sold by Acorn as the AKF12

@firstsurname9893 Год назад

Although the Philips versions are more common Daewoo and Likom also made 1084 monitors.

@EdgyNumber1 Год назад

BBC BASIC was in my opinion the best, and switching between this language or the assembler in line, made this system sooooooo efficient to work with. I so would sorely love to see BBC BASIC V on Raspberry Pi.

@grahameida7163 Год назад

I wrote a program on this micro to calibrate reference grade accelerators for national standards in the UK, using laser inferometer techniques and IEEE controls … BBC basic was so powerful back in the day.

@truckerallikatuk Год назад

Yep, I wrote a full on database in BBC basic for my exams back in the day. It was clunky and did things the slow and long way, but it worked fine. BBC basic is insanely powerful, and encouraged structured programming. And the built in assembler was fun too.

@Error6503 Год назад

My final year university project was to build a satellite tracker using a Beeb. Orbital calculations were in BASIC talking to the Real Time hardware controller written in assembler ... I absolutely loved that project.

@stevewhitcher6719 Год назад

In the 1990's in the UK most TVs could display NTSC 4.43 which is the oposite of what you have created here 60hz but with pal colour this was used by people that had american VHSs or DVDs because there was a wider range of titles avialble in the uS and japan.Because i wanted to record my US sourced VHS to DVD i ended up buying a US DVD recorder ( which was very cheap because it didnt work in the UK) and an analgue TV standards converter so that i could convert my NTSC 4.43 that was coming out of my UK sources VCR to NTSC 3.58. Previously i had, had a Uk sourced VCR that had a switch on it so that it could either output pure NTSC or 4.43 they were sold in the UK by panasonic and all anime fans had one, but mine had broken before i had sourced the NTSC DVD recorder hence why i used the standards converter! I aslso discovered that my analogue converter also removed macrovision!

@kaitlyn__L Год назад

I remember saving up for a DVD player with the same output switch option, always wanted the fancier VCRs but by the time I had my own money there was less of an impetus to get one.

@AlsGeekLab Год назад

Loved this series. Beeb is such a great machine and the mods you made were great.

@GreenJimll Год назад

Cool. I suspect there's not going to be more videos about this BBC Master in the near future because Adrian is going to be busy playing Chuckie Egg. 🙂

@DavidFrankland Год назад

He should be playing Elite

@grahameida7163 Год назад

@@DavidFrankland I was in my second year at secondary school when elite was released, built analog joysticks with parts from Tandy, then had all night sessions getting to Elite! I must have the badge I got somewhere in the loft at my parents!

@Beany2007FTW Год назад

Well, goodness, this takes me back to primary school in the north of scotland. That said, we didn't do anything quite as fancy - we played a gardening simulator (who can grow the highest sunflower) and Rocket Raid, and Chuckie Egg. Got a few of us hooked though; I'm head of IT for an IT services company, a mate is the IT teacher at our old high school, and another mate went to uni to do robotics!

@ChrisStedham Год назад

Great video. If you have a couple of spare Raspberry PIs there are a couple of things you can do... Coprocessor emulation through the Tube interface (pitubedirect) and 1MHz bus device emulator (Pi1Mhz). Also... Have you figured out the significance of the StarDot forum's name? 🤔

@londonbobby Год назад

yes the Coprocessor mod would be fun to play with, especially the 80186 where you can run old DOS programs.

@adriansdigitalbasement Год назад

Hah yeah ... *. for directory listing on the Beeb :-)

@LibertyWarrior68 Год назад

The 68 Ohm output video resistor is probably correct because you also need to account for Collector Emitter resistance of the transistor which is probably 7 Ohms to make a total of 75 Ohm appearing at the output.

@andysimpson8974 Год назад

Guy from Northern England here. My school had a suite of these in use well in to the nineties. Some thought they were rubbish because PCs were appearing in homes by then and the graphics weren't as good as my Sega Megadrive 😂😂

@EnglishMike Год назад

Note: the schematics came with the original manual. Edit: as my fading memory comes back, I remember it was included with my BBC Model B manual as a fold out in the back of the manual. It's been a while since the days when everything came with a comprehensive manual... :)

@kwanchan6745 Год назад

not the standard manual, a bbc micro foldout circuit schematic came with the advanced user guide which had to be purchased separately there is a newer online version with the original errors corrected

@kwanchan6745 Год назад

the original manual had some schematics at the back, but they were not foldout and not A3 size like that of the AUG

@moojuiceuk Год назад

Great to see the Beeb getting North American exposure. If you could get your hands on an original Acorn Archimedes (A300/400 series) with an ARM2 and RISC OS as a good follow on from this? I don't think many people in America have seen that awesome little computer, or realise its importance in computing history.

@erinwiebe7026 Год назад

Your enthusiasm is so much fun to watch @Adrian!

@Duddie82 10 месяцев назад

I programmed lots of programs in Basic. I created a learning program that covered Numbers, Colors. shapes sizes. My first child used my program and she got really good at it. When she got to school, they put her in first grade. She was too smart. And she excelled in first grade too. It was a powerful program. I know I should have put that program out. When I left my EX. She made sure she got rid of all my programming programs. It took me a long time to get that program finished. I would love to do it again. But I don't have a programing system anymore. And also no money to buy one. I Love the work you do. Big Time!!

@michaelcarey Год назад

Great video Adrian. Even though I was a die hard C64 teenager in the 1980s, I had a lot of respect for the BBC machines. Toward the end of my school life my High School (in South Australia) set up a computer room with a dozen BBC B machines, all connected to each other, a shared printer and floppy drives with Econet. Loads of fun sending messages between machines using Econet 🙂

@m1geo Год назад

Nicely done, Adrian. 👍

@falken_gt4 Год назад

Really enjoyed this short series, brought me back to school and early IT work days

@Bob3519 Год назад

Another great one! Thank you Adrian!

@kildogery Год назад

This was fascinating. Thanks. Learned loads, even though I didn't understand much 😊

@roboftherock Год назад

Thanks, Adrian. That was an excellent triptych. I really enjoyed them.

@mogwaay Год назад

Great video, loved seeing you enjoy getting into your Acorn. They were such well designed technically excellent machines, wish they'd seen more success but the business side of Acorn wasn't always the sharpest I think. Really fun watching you mod this and get it working in a way that suited you, well done! Would love to see you jump to the littlest machine, the Electron as I've been working on that the most recently with a ULA replacement project. Cheers!

@Pink404 Год назад

It great to see your joy exploring the BBC Master computer. Being from the UK this was one of the systems I had fairly regular access to.

@timothyp8947 Год назад

When I was at school, oh so long ago, I used to think the BBC was quite clunky compared to my VIC-20 (and the PET that had been donated to the school because the screen editor built into commodore machines was just streets ahead of anything else in terms of usability. I think the (much later) Master may have had alternatives, but the standard 'copy key' method of editing is a bit horrid - half a step above a paper terminal. HOWEVER, as a now semi retired software engineer, I now appreciate how clever the software architecture of Acorn MOS is; the Sideways ROM idea, for example, allowing lots of alternative file systems, programming languages etc. all within the confines of the 64K address space is something I think no other (non Acorn) 8-but got close to. Then add in concepts like the Tube.

@adriansdigitalbasement Год назад

Yeah the Commodore editor is a shining star in late 70s system honestly ... And indeed, if you had a BBC and were doing any serious editing, it looks like you really needed to get that Basic Editor ROM I've seen some people use. It's quite amazing that the 1977 PET had that wonderful editor that everyone loves from the VIC-20 and C64. But yeah, the computers are just so smartly designed, and the rest of the basic interpreter is pretty damn great.

@frazzleface753 Год назад

It was great to see you learning this system and solving the challenges along the way. This is a very rare computer in the US, and to get it running natively with the best output for North America, is just awesome!

@DarkVain Год назад

Great Vid Adrian!! Still love the 1702 had the best picture.

@CobraTheSpacePirate Год назад

Haha! I think it is hilarious when you mention people complaining about covering the UV erasable PROM. I have them sitting all over the place and in machines with no stickers. I it just a pain to take the sticker off every time a new update comes out. LOL!

@adriansdigitalbasement Год назад

Yeah I normally don't cover them because it's just a non issue. I don't leave them sitting exposed to sunlight :-)

@AdamHougham 9 месяцев назад

Great video Adrian - thanks for the epic series finale! My neighbour used to have a Beeb Master when I was growing up, while I had to make do with the little 'Elk'! I also got to use them at school in our 'CDT' (Craft, Design & Technology) classes where we learned BBC basic, and LOGO while playing with a Turtle. Of course, the other MUST TRY piece of software is Elite as this was where it all started for Dave Braben's masterpiece. They're not cheap these days so having a Master, two Micros and the Elk is quite an acheivement, particularly as you're left of the pond. I make do with emulation and reminisce the old days while waiting for the simulated tape deck to load my software! If you get the chance to check out a Turtle, I'd recommend it and of course the ultimate Beeb addon - the Domesday Project!

@delmonti Год назад

brilliant! ...and excellent machine in every way.

@AntneeUK 10 месяцев назад

Everyone I know in the UK who used these when they were current are used to the Micro Vitec Cub monitors. The memories!

@Pest789 Год назад

Wow, this machine is really slick.

@pupaepedorra Год назад

DARN! Amazing vide, it is such a treat :D

@moqtev 8 месяцев назад

Excellent series Adrian 😊

@AntneeUK 10 месяцев назад

What a great series. Have watched all 3 videos this morning

@NowInAus Год назад

Your reaction to colour … awesome and such a testament to both your labours and the enthusiast community.

@videolan Год назад

Great detective work and well done!

@patrickfurlong4276 Год назад

Another fantastic video thanks!

@TonyHamlyn Год назад

Awesome, I felt your joy when you pulled that Intel/Moto pin high and were able to store the CMOS settings. Love your vids.

@trickysoft Год назад

If you look at my SD card adapters, it is just a board to move the wires around and an arduino adapter soldered together with a 20pin plug. I sell them with an SD card with my menu on it and an EPROM with MMFS but only in person, usually at shows to people who I think would otherwise put their beebs back in the loft or get rid of it. This isn't an advert, so please don't try to buy one from me. You may have noticed the white triangles near the IDC connectors, all the original BBC add-ons have matching triangles on their connectors to help get them plugged in the right way around. I put them on my boards, but tipex (snow pake or whatever over there) or a piece of white tape can save you from embarrassing mistakes ;)

@garyjohnson4608 Год назад

I've enjoyed the videos about the Acorn. This is the first time I've ever seen one. Very interesting machine.

@anthonyblacker8471 6 месяцев назад

Very nice work on this ne Adrian. Superb find on the battery hack with pin one. Very very nice. Great content!

@ThaVoodoo1 Год назад

Great Video Adrian, as an Amstrad CPC 464 owner this is so cool to see the BBC Master.

@deadreaver666 Год назад

Parts bin for the win! Well played sir

@tcpnetworks Год назад

Fantastic video Adrian. We had these machines for about 5 years in Australia - and they were fantastic. We did computer science at high school level on these very machines. I had one at home until 1992, when i upgraded to an Archimedes.

@oldboy5001 Год назад

Great mods. I wish I'd had your skills when I owned a BBC back in the day.

@idio-syncrasy 10 месяцев назад

I can tell you really liked the bbc master. Thank you for this series.

@JuliaMono 3 месяца назад

Seeing your honest, unfiltered joy in learning and tinkering is so so refreshing and cool. Thank you so much

@chuckbenedict7235 Год назад

I really enjoyed this. Nice mods.

@Codeaholic1 Год назад

Very cool. It would be fun to see some of the later riscos systems.

@AlastairMontgomery Год назад

Yes it would be good to see what he thought of those systems.

@adriansdigitalbasement Год назад

Sadly they are completely unobtanium here in the US. The best I could do is show off Risc OS running on bare metal on a Raspberry Pi. It'll be insanely fast compared to the original machines, but it's a pretty nice experience. www.riscosopen.org/content/

@petesapwell Год назад

Really enjoyed this one Adrian, I did briefly encounter the BBC computer here in the U.K. nice machine, I live the font they use.

@rictecilder Год назад

Great group of mods for an old computer, now I want to fix up my CoCo collection with SD cards and mode there video outputs. Thanks for all the great videos. Even if it is just reseating chips like a few have been.

@BottIsNotABot Год назад

Brilliant video as always, and still such a joy to see the BBC Master in action. Highlight of this video though is when you worked out the NVRAM around 59mins. I need to add a BBC to my collection, and think the Master is the way to go.

@rager1969 Год назад

Very cool. I can see your very stoked and emotionally satisfied by what you did here, and I don't blame you. It feels great when you achieve the elusive/ultimate (insert thing) on your own rather than following someone's guide.

@kdrum90 Год назад

In my opinion, this is one of the best Adrian’s videos so far. BBC machine is charming and looks very capable, it would be nice to see what it can do.

@UpLateGeek Год назад

I never saw a BBC Micro or Master at school here in Australia, at least towards the end of the 80s. My school (primary school years 1-6) had Microbees until the early 90s, when we upgraded to windows 3.1 machines, I'm guessing in 1993. It is really cool to see what we missed out on. The BBC Master does seem a lot more powerful than the Microbees we had. Although I'm pretty sure it was much more expensive than the Microbee, so our school wouldn't have been able to afford to buy as many computers. I remember we had one Microbee per student, but when we upgraded to the Windows machines there were fewer so we had to share. If we had BBC machines instead of the Microbees, we probably would've had to share those too. Mind you, from what Perifractic described of his school years, they shared computers at his school anyway, and the UK government was funding the purchase of those BBC machines for schools too.

@joeysartain6056 Год назад

Excellent video!

@amyworrall9246 Год назад

Glad you noticed the colour jumper for composite! I was shouting at the screen :)

@geoffcollins6601 Год назад

Awesome video - many thanks. There is so much more the BBC B & the Master can do. Try a RPI as a co-pro on the tube interface.

@mwk1 Год назад

59:20 - przekozak jesteś Adrianku 🍻

@jayfowler4747 Год назад

I recalled the name chuckie egg but when I saw the screen it brought back memories of playing it on my acorn electron ( which I pulled to bits 😅) one other thing that you reminded me of was getting a BBC B with a sideways ram/rom board that I never did much with but I seem to recall it having a varta bomb 😮 I think I need to dig it up and check.... thanks for the trip down memory lane, keep the videos coming.....

@paulsaunders5555 6 месяцев назад

O my God. it's like seeing my cradle agen. Enjoyed the series. Xxx

@peteregan9750 Год назад

it was used in schools in australia - really enjoyed its functionality in 1988 as moving to other systems was easier Because of its functionality and econet and seeing the phillips laser disk software. it gave a great insight of a lot of functions we use today. bought an amiga in 91 .....

@Roxor128 Год назад

With a name like the BBC Master, I just have to imagine an ad for the thing with Anthony Ainley doing a voice-over in the voice he used for The Master on Doctor Who saying "I am The Master and you will purchase me!"

@kevywevvy8833 Год назад

I'm pleased to see you have the opportunity to appreciate a stalwart of 80's british microcomputing, in a country where it's pretty obscure. My UK college days were spent on a mixture of PDP11 and BBC 'B' but the classroom had a couple of Masters for good measure. The B and the master had a colour-co-ordinated monitor stand available that went over the back end of the computer making the thing look a bit like a PET. The standard colour monitors supplied in educational establishments were the uk-built Microvitec 14in RGB metal-cased monitor, (in a matching cream-beige) later ones being called the 'cub' monitor. For mono monitors, the Philips green or amber 12in plastic deal were the popular choice on composite.

@HojoNorem Год назад

The incompatibility you mention near the end could also be due to the Master using a CMOS 6502 based CPU, while software written on the Micro would have been a original NMOS 6502. The stuff that's failing most likely is using some 6502 unofficial opcodes. Anyhow, great vid. Somebody needs to get you a Acorn Archimedes to play around with.

@andyjdhurley Год назад

Agreed, although the BBC and Master were much easier to mess around at the hardware level, by the A3000 era it was more about software. I leared my hardware basics with the BBC B, assembly language and coding my own ROMs, once I got the A3000 I stuck to coding and office applications.

@nickblackburn1903 Год назад

Shift and Escape should launch the menu I think? I love watching you, an American experiencing this amazing UK computer. :) Nick, UK :)

@MarianoLu Год назад

Love the BBC videos. Never had one but it looks like a great platform, they are had to come by here I’m the US.

@nickolaswilliams935 Год назад

“Love the BBC” I stopped reading and laughed 😂

@fattomandeibu Год назад

I used these things at school as a primary schooler, but I have more C64 memories for games, but its always really cool to see them. Great to see running, and fun to see your solution to certain... I guess you'd say regional problems. I remember using PAL60 on the Dreamcast and A1200 just to be able to get a colour picture on my RF only bedroom TV. For downstairs when me mum was out or in bed, I could use SCART for RGB. With the Dreamcast it's sorta surprising, as it was inbuilt into most games to ask if you want to play in PAL60 on startup, it's odd for such a hacky mode to be almost system standard. I only ever had 1 TV it didn't work on and it was an expensive JVC set from the early '90s. Even cheap crap '80s portables managed it after a quick fiddle with the vertical hold.

@stub1116 Год назад

Brilliant video.

@MrUSFT Год назад

Such a great machine. Really well designed. I wish it had been more available in north america

@sweh Год назад

The corrupted text is likely due to a compatibility difference between the original BBC and the Master; in particular how they handled soft-defined characters. The memory map changed between OS1.20 (the B) and MOS 3.2/3.5 (Master). So it's not uncommon for B games to show corrupted characters on the Master, especially if they cheat and load directly into RAM rather than using the official "define character" routines. You can get a "multi-OS" ROM for the Master that lets you have MOS3.2, MOS3.5 _and_ a modified OS1.2; just switch between them with a toggle switch. The OS1.2 mode normally solves these problems.

@cdl0 Год назад

Adrian should be nice and warm this winter with all those jumpers that he has. :-)

@leesmithsworkshop Год назад

Ozretrocomp Tony is one of the nicest guys, we both made Electron videos so got talking over that at the start of the covid times.

@jaimeramoscarranco Год назад

36:10 the exicetement on your face jajaja Nice thanks for the video 😊

@Soruk42 Год назад

For mass storage on my Master 128, I opted for the Pi1MHz solution, which interfaces a RPi Zero with the 1MHz Bus port under the keyboard through a level shifter board. The firmware on the SD card as part of this project emulates (amongst other things) the BeebSCSI add-on, which provides me with up to 4 hard disc images, each up to 512MB in size - so that's 2GB disc space. What's even better here is no ROMs (or ROM images) need loading to support this, as it's completely compatible with the built-in ADFS. (I also had a spare Pi Zero that was gathering dust from an earlier project that was no longer in use, so I gave it a new home here.) For video output I got a cable which connects the RGB socket to the RGB lines of a SCART plug which goes in the back of my TV. Good video series, I enjoyed watching it. I had considered MMFS, but ultimately decided on Pi1MHz as I don't have any EPROM programming kit (or any EPROMs to use).

@JamsterJules Год назад

Absolutely brilliant. You get the same buzz from fixing stuff as i do from coding still (am im 55!)

@chrisyboy219 Год назад

BBC Master Compact on my shelf here in N America (Canada). Didn't make any NTSC mods though, cause I have a PAL RGB Scart TV. I installed an SD interface internally with the exact same games image it looks like you have, and I also installed a little RGB to S-Video board inside that brings S-Video out to the back of the system which is handy when I use it with a projector! Even though most North American TV's are absolute shite when it comes to handling PAL, projectors sold here can be quite good so I use them a lot!

@aw34565 Год назад

Great video. I have a BBC Master here in Massachusetts. I use an RGB -> SCART cable from fleabay and a SCART to HDMI upscaler to view the video signal on an HDMI monitor. This solution works very well for me.

@adriansdigitalbasement Год назад

Yeah that's how I first hooked up my BBC Model B ... those upscalers are quite laggy unless it's something like the RetroTink or OSSC, but those are so costly.

@edgeeffect Год назад

If you've got 8 gig, I think you could possibly hold all the BBC Micro software ever! ;)

@paulomigueldias1111 Год назад

I was the proud owner of a BBC B in 1983 after having a ZX Spectrum and I was worried to come down from 48K to 32K but this machine and it's BASIC and in-line assembly simply made the best ever 8bit machine. That how I learned about I/O a Analog to Digital conversion and finally was able to connect the BBC to my electronics, LED's, servos, the works. Take good care of that machine my friend, I am also going to use some parts I have to make a SD card upgrade like you. Great work !

@Quessir Год назад

I only understand about half of what you say Adrian, but it's fascinating all the same :)

@melkiorwiseman5234 Год назад

I noticed that link on IC40 the first time you showed that area of the circuit diagram. I was waiting to see if you spotted it too before commenting, but I thought immediately that there must be a way to reconfigure the hardware to use NTSC instead of PAL. It's fun to see that you noticed it too, and that it worked.

@button-puncher Год назад

I love that someone got SPI working with this machine. Such a perfect solution. BTW, if you ever have a damaged SD card, using SPI is a good option to try to get the data off of it. It takes FOREVER but it works.

@billfruge25 Год назад

The BBC Micro is, IMHO, the best 8-bit machine I've ever used. The BASIC supports in-line assembly, and it can be expanded from the basic cassette tape model all the way up to running Digital Research DOS and the GEM Desktop GUI off a SCSI HD simply by installing/swapping out the primary and secondary CPU's and a file system ROM. I really wish this machine had caught on better in North America back in the day as it was/is so much better than anything that was out at the time.