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Commodore PC 1 Part 2/3 : New final PSU and playing some games

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Part 2 of my Commodore PC-1 series where I will be replacing the Power Supply with a new embedded switch mode power supply unit.
I'll also be playing some games and checking out both the monochrome Hercules and the CGA mode on the computer.
You can find part 1 here where I am introducing the Commodore PC-1 and using a temporary power setup to start it up : • Commodore PC 1 Part 1/...
** Attention ** : This video talks about replacing an AC/DC power supply in a computer. This is not something you want to mess with without knowing what you are doing. I'm not going to show you how to repair / debug such a PSU as I consider this to be very dangerous and do not recommend inexperienced people probing around such power supplies.
I do want to link to an excellent video about discharging capacitors called "How to Safely Discharge a Capacitor" from DigiKey : • How to Safely Discharg...

Опубликовано:

28 авг 2024

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Комментарии : 74

@stefanegger 4 года назад

You have to exchange the ROE (golden) capacitors. Especially the 2200 range etc. (not the 400v ones usually). All caps manufactured in this golden crap, or trademarks of Frako and ROE as well as made in W. GERMANY ones are often broken in a2000 PSUs, too. Source: Just my experience.

@IDPhotoMan 4 года назад

Not a biggie, but you can totally get rid of the shielding. All it does is hold heat into the board and chips. It was originally included to reduce RF interference to be compliant with FCC rules. Remove and be happy.

@feieralarm 4 года назад

I see Knipex, I see Jokari... That's some nice, quality tools!

@RetroSpector78 4 года назад

I like the Jokari, and the Knipex was an investment as I had to do a lot of crimping a while back .... both are nice tools, however still in the hands of an amateur / hobbyist :)

@wimwiddershins 5 лет назад

I would replace the rubber grommet on the DC power wires coming from the metal PSU case.

@offperception 4 года назад

My friend used to have one of these and we spent many afternoons playing games on it when we were kids. To run a lot of CGA games we had to run a small TSR program and then the CGA games would run fine. I don't remember the name of it but it was part of the disks you got with the machine. Also I would recommend hooking up a PC speaker as this machine has a very unique POST beep and key press sound. I remember that in-game sounds were never shrill, but rather warm instead.

@jimb4049 4 года назад

Really enjoy your videos, the patience and knowledge is on point. Keep up the great work.

@RetroSpector78 4 года назад

Thx a lot ... enjoy making them... also helps me remember stuff :) on a couple of occasions I had to rewatch them when I ran into an issue :) also wanted to have some kind of little legacy for this strange hobby to look back on later :)

@PJBonoVox 4 года назад

I hate myself for whining about it, but did you seriously just cut the the wires to the mains passthrough and just leave it disconnected? That's shoddy.

@joedwoods 4 года назад

Loving these videos. Really inspired me to get back into this hobby. You make things look quite easy to repair, and the steps you take are just common sense and quite easy to follow.

@radiofun232 4 года назад

You can also make yourself a completely new power supply, consisting of classical (no switch mode) units, with transformers/recifiers (+ and - voltages) etc, when you know the voltages needed to make it work. I did that in the past and it worked properly.

@bennetfox 4 года назад

Where is part 3?

@SiD3WiNDR 3 года назад

Wondering the same thing! :-)

@saturn5tony 20 часов назад

@SiD3WiNDR yup 3 years later I'm waiting as well.

@HuntersMoon78 4 года назад

You're left-handed too - us lefties are unique :-) Especially lefties that like retro tech

@Psychx_ 4 года назад

I am lefthanded aswell. These kinds of videos seem to attract us :D

@mark12358 4 года назад

missed the rubber protection for wires out of the psu

@RetroSpector78 4 года назад

Mark D nice catch ... had indeed need to redo those afterwards :)

@douro20 4 года назад

I wish surplus applicators weren't so expensive since it's not too hard to build a press to operate one; they seem to hold their value extremely well, even ones which are decades old!

@burntoutelectronics 4 года назад

I wonder if the fuse was blown on the PSU? Also piece of advice, don’t take the mains wires onto the connectors you really want to push them through the holes in the tab to make a good physical connection as the last thing you want is a broken wire and a live wire swinging around

@RetroSpector78 4 года назад

Fuse was not blown. Usually the first thing I check. Thx for the advise.

@BenState Год назад

@MrTGuru why did the fuse blow though?

@BenState Год назад

@MrTGuru Will not blow a fuse. The 'critter' will vaporise before any fuse will. Think about it.

@RetroMarkyRM 4 года назад

Loving your videos. I have a PC-1 btw. Did you hook up a Zip drive to load games on? If so can you tell me how. I presume it's through the parallel port?

@asanjuas 4 года назад

This commodore uses plantronics color plus to get 640x200 16 colores.

@NaokisRC 4 года назад

I was going to say this, hence why it might not clock as being compatible because of differences

@roadsiderebels3039 4 года назад

Using a modern power supply is a great idea! I have a Packard Bell 386 and finding a replacement has been impossible. Can you share the link to where you purchased the replacement power supply?

@InsanePsychoRabbit 4 года назад

At 6:36 I see what appears to be a big crack in the PSU board, which would explain why it doesn't work.

@mickholling6819 4 года назад

Very nice video's on a subject close to my heart. I collect old 8-bit computers and have a lot of sinclair/commodore software.

@ackman3981 2 года назад

Back when this pc was made and used, that was how fast machines where back then. We thought that was really blazing fast.

@Psychx_ 4 года назад

@RetroSpector78 Just out of curiosity - have you checked the fuse of the original PSU?

@RetroSpector78 4 года назад

Yes :)

@Hal9526 5 лет назад

Where is part 3 of this series? I can't find it.

@RetroSpector78 5 лет назад

Still in the production pipeline :) Had a shift in priorities.

@bierundkippen720 5 лет назад

RetroSpector78 I’m also waiting.

@alexdhall 3 года назад

@@bierundkippen720 Maybe he will get around at some point to finish his work on the PC1 at some point....

@antonycullen6225 2 года назад

Cracked arkanoid, love it :)

@user-wj9xq7ig2v 11 месяцев назад

Nice work around the no HDD with the parallel zip drive. Did the palmzip drivers just work or did it take some messing around.

@MadsdeVriesLaursen 4 года назад

curiosity... what's the big connector at the back edge of the mainboard? ISA bus?

@timrichter1980 4 года назад

If I remember correctly, these older PSUs shouldn't be powered on without load?

@BenState Год назад

Don't just tack the wires to the connections, you must provide mechanical support also, plus, you should update the wiring to modern approach for order of connections.

@user-pk7mb9is1e 3 года назад

how did u hook that zip drive?and how did it reconized as drive c: ?

@osgeld 4 года назад

just food for thought, almost all connector suppliers will sell pre crimped wires in various lengths for a buck or two (JST included) just check with your local internet supplier if you do not want to fiddle with crimpers or don't have them

@RetroMarkyRM 4 года назад

One more question, do you know what RAM chips are needed to boost it up to 640K by any chance?

@RetroMarkyRM 4 года назад

@Mr Guru Thanks for that. I tried 4x 41464's but got a RAM timing error. Need to check the schematics I guess. Maybe there are jumpers / it's picky about RAM timings?

@RetroMarkyRM 4 года назад

@Mr Guru Oki doke. I'll double check the chip speeds. Thanks for that :)

@HelloKittyFanMan. 5 лет назад

Hehe, cool, using your second floppy drive as a hard disk! I hope that's a 750! (But having them vertical like that makes me cringe even though those are less sensitive than hard disk drives, and I think they look better horizontal too. Oh, I see that you read my mind later in the video!)

@RetroSpector78 5 лет назад

Iomega zip drive casing allows for it to be placed vertically so I assume there are no issues running it like that. I guess some pc cases also allow hard drives / floppy drives to be mounted like that.

@kaczan3 4 года назад

Is there no part 3?

@gbclab 4 года назад

Why you eliminated the monitor mains connection on power supply harness?

@gbclab 4 года назад

@Mr Guru there is no load on the PS, the voltage is taken directly from the mains and only pass from the main switch....

@gbclab 4 года назад

@Mr Guru ok...

@dennisdsp4766 2 года назад

What DOS version were you using if I may ask? I have this pc, in working condition, and would love to hook up my Zip drive on this machine. I have a dos 3.2 start up disk. I need a way to make a bootable dos floppy which supports the Zip drive.

@karolvenczel6109 2 года назад

i have this PC also, i am running it with dos 3.31, dos 5 and dos 6.22, all from DD 5.25" floppy

@proxy1035 4 года назад

personally i would've used a switch with 2 internal switches so you can turn the Live and Neutral wire off at the same time instead of leaving the neutral wire connected. for added safety

@p3kkalang3r 4 года назад

My PC-10 PSU had just one bad cap that shorted the output so the PSU just switched on and off repeatedly, making a ticking noise.

@user-pk7mb9is1e 3 года назад

very nice!

@SmoggyLambGG Год назад

_"WTF is this!? This isn't even a video card! I ain't running on this text-mode POS!"_

@louiselynge2763 3 года назад

Hi retrospector. If you could send the faulty PS for the Commodore PC-1 with the schematics, I would like to repair it!! Free of charge of course.

@st.alexiev625 4 года назад

why you did not share the link of the power supply ?

@user-pk7mb9is1e 3 года назад

no RTC battery?

@HelloKittyFanMan. 5 лет назад

"Generic" crimping tool? Hmm, naww, it's a Knipex.

@gilbert1975nf 4 года назад

2:57 - right near your thumb there some thin black marks.... I could started from there.

@SwedishEmpire1700 4 года назад

....Part 3?

@krzysztofb9279 4 года назад

lol he calls knipex tools generic... those are some expensive crimpers lol

@HelloKittyFanMan. 5 лет назад

LOL, just because something runs on AC doesn't mean it's automatically high-voltage. "AC" doesn't stand for "high voltage." What makes that a high-voltage source is that it plugs into mains or an equivalent.

@RetroSpector78 5 лет назад

Absolutely right. Will see if I can add a caption to the video to clarify that.

@drzeissler 4 года назад

Hercules is best.

@SuburbaniteUrbanite 4 года назад

by the time he would of made the new power supply work with the computer he could of fixed the old one -_-

@VenomStryker 4 года назад

It's not about time, it's about reliability. You would literally have to replace ALL the components on the PSU to make it brand new. This is much easier.

@MrHBSoftware 3 года назад

@@VenomStryker so a psu design that lasted 30 years is less reliable than a modern wuhan coronavirus compliant PSU? gotta be dreaming....the old psu may not be as efficient but sure looks simple to troubleshoot and maintain...semiconductors dont degrade due to age, they are either good or bad. fixing the old psu and then recapping and it would last another 30 years