STE CPU adapter for PiStormST or DSTB1

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I've been making heavy use of the Exxos PLCC to DIP adapter for my STE when developing PiStormST and DSTB1. It's great, but the orientation doesn't let put my keyboard without soldering directly to the board.
As an experiment into building a PLCC emulator of my own, I have a go at designing and building a re-oriented PLCC to DIP adapter for the STE and see how much room I have left to work with. Spoilers: not much.
/ thetechnoshed
Links:
My project at PCBWay: www.pcbway.com/project/sharep...
The STL for the 3D-printable backing plug can be downloaded from the above link.
Exxos' adapter www.exxosforum.co.uk/atari/st...
Exxos' backing square www.exxosforum.co.uk/atari/st...
TwiSTEr www.atari-forum.com/viewtopic...
DSTB1 github.com/dh219/DSTB/release...
PiStormST playlist: • PiStorm
DSTB1 playlist: • DSTB1
STE playlist: • Atari STE
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PCBWay offer PCB manufacture, CNC machining, sheet metal fabrication, 3D printing and injection moulding: www.pcbway.com
They also ahve an impressive community section where users can share designs: www.pcbway.com/project/
Or order complete modules: www.pcbway.com/project/gifts....
As of the date of publishing the 5th PCB Design Contest is underway. Submit a project to enter!
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0:00 Introduction
0:27 My current Exxos adapter
3:16 The plan for this project
7:45 My design
10:24 PCBWay!
11:07 PCBWay send me swag
16:15 The boards arrive
17:07 Soldering up the board
23:20 Fitting the adapter board
28:47 The 3D printed backing square
32:15 Summing up

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Опубликовано:

22 июл 2024

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Комментарии : 26

@fenarinarsa Год назад

Very interesting! I can't wait for an all-in-one accelerator board for the STE!

@thetechnoshed Год назад

Many thanks! Have a look at the TwiSTEr (linked above). It's absolutely packed with features. Other end of the price spectrum to my boards, though.

@fenarinarsa Год назад

@@thetechnoshed Oh thanks :) exepensive yes, I'd better wait for something based on PiStorm :)

@lucasjokiel Год назад

Great! Ordering!

@lucasjokiel Год назад

Came it after 2 weeks and now all I need is some free time :)

@sarreqteryx Год назад

before soldering the 1.27mm pins in, you could slide the plastic holders up (into the pcb) an extra mm, then slide them off after soldering

@GadgetUK164 Год назад

Great job! It's super frustrating trying to mod the ST with regards to the CPU socket and its locations across the different rev boards. I wonder if you could mount the CPU on the underside of a PCB that extends out like that. Of course that doesn't help withh the PiStorm =/

@thetechnoshed Год назад

Thanks! Yes, there is so little room to work with too. You can maybe fit one board at best in some of them, but a stack is out. Will Probably have to do dedicated STE versions of my accelerator or PiStorm if I want to close the lid. This was really an experiment in making those PLCC adapter pins fit, so big tick in that box at least.

@christophelaporte3247 Год назад

Great job! thanks for sharing

@ArthLud Год назад

Awesome!

@falconste5427 Год назад

Just found your channel, very informative, now starting to watch more of your vids, great Atari content 👊

@thetechnoshed Год назад

Many thanks!

@a1exh Год назад

At 8MHz do you need to length match tracks or anything?

@thetechnoshed Год назад

No, at 8MHz you can practically go and have a cup of tea whilst you wait for the data pulses to arrive!

@MykonianVillas Год назад

Looks much better than the other adapter that I also have. When will you put on sale some of them? Also, can you give a link to the 3d square because in pcbway you have to be a member? Thank you in advance!

@MykonianVillas Год назад

Also which files you installed on the sd card? Where some modifications from the ones for amiga necessary?

@thetechnoshed Год назад

I shan't be selling any pre-made ones, if that's what you mean. The PCBWay link is an easy way to order some boards. The backing plate is really just a cuboid, but here you go: www.thingiverse.com/thing:5538610

@thetechnoshed Год назад

Everything on the Pi and PiStorm side is different from trunk & all experimental. You'd have to have a look at my GitHub, specificically under the 'wip-pistormst' branch for the latest. github.com/dh219/pistorm/tree/wip-pistormst Details on PiStorm Discord.

@DAVIDGREGORYKERR 4 месяца назад

When will someone reduce the PiStormST and Raspberry Pie IV into a FPGA that could be mounted in a FPGA socket.

@thetechnoshed 4 месяца назад

Progress on drop-in FGPA replacements for the 68k line (specifically 020+) seems to have stalled. Vampire can do half the job, but the ST and Mac need the other half too.

@paulwratt 9 месяцев назад

(releated to the trace length match comment below) if you have a high speed device like like your DSTB1 with 16MHz CPU & 32Mhz memory access (or a PiStorm), is it possible that the trace length _does_ affect the BLITTER is some way (problem found in your other video) ?

@thetechnoshed 9 месяцев назад

I don't think so. 16MHz is pretty pedestrian in terms of signal transmission speeds. I think you'd need to be into the hundreds of MHz before trace matching would be needed. You need about six inches of extra path length to offset a pulse edge by one nanosecond. We're dealing with 60ns clocks.

@paulwratt 9 месяцев назад

@@thetechnoshed good point, just remembered seeing a RPi push a RC2014 bus to 120Mhz - still I dont remember the layout of my STe looking like yours (had the case permanantly off due to PC floppy, and not wanting to cut anything), but it too was non-sip model, so maybe "old age" memory