klke
Member
I have a Super Breakout rev-03 non working PCB that I would like to start troubleshooting, for that I would like to convert to rev-04 that has just 3 proms and strap 2716.
Digging on the forum I found a thread about that were HudsonArcade posted valuable information:
I found his MK28000 to 2716 adapter pcb design on Oshpark and was trying to find the way to adapt so Super Breakout, this is the rev-04 rom addressing schema that I found on the Atari Superbreakout Cabinet manual:

When I read HudsonArcade answer I was thinking that maybe I would modify his original adapter to add a IC 7404 to invert OE signals and make it work. I started to enumerate pins of his adapter and validate it with mk28000 and 2716 schemas:

And I made a comparison table on excel:

But I saw that OE signal pins of MK28000 are not pointing to any pin.
At this point, due to my complete ignorance of circuits I am absolutely lost maybe someone can help me.
Seems there are not many info about this board and how to strap other eproms besides the famous Grant Searle 2008 restoration thread.
Edit: Just wanted to document a bit Grant Searle adapter

Digging on the forum I found a thread about that were HudsonArcade posted valuable information:
C1, D1, E1 are the 8-bit proms, but it can be populated with 4 bit proms instead (4x 4-bit PROMs per 8-bit PROM)
C1 = ROM2 = /PROM3 + /PROM4 = J0 + J1 + L0 + L1
D1 = ROM3 = /PROM5 + /PROM6 = L0 + L1 + M0 + M1
D2 = ROM4 = /PROM7 + /PROM8 = N0 + N1 + P0 + P1
Unfortunately the M28000 to 2716 adapters I posted for free on OSHPARK need to have the /OEs inverted to be used on super breakout, so those won't work for you.
I did a high score save kit that replaces the PROMs with a CPU plugin, but I never got around to testing on real hardware.
I found his MK28000 to 2716 adapter pcb design on Oshpark and was trying to find the way to adapt so Super Breakout, this is the rev-04 rom addressing schema that I found on the Atari Superbreakout Cabinet manual:

When I read HudsonArcade answer I was thinking that maybe I would modify his original adapter to add a IC 7404 to invert OE signals and make it work. I started to enumerate pins of his adapter and validate it with mk28000 and 2716 schemas:

And I made a comparison table on excel:

But I saw that OE signal pins of MK28000 are not pointing to any pin.
At this point, due to my complete ignorance of circuits I am absolutely lost maybe someone can help me.
Seems there are not many info about this board and how to strap other eproms besides the famous Grant Searle 2008 restoration thread.
Edit: Just wanted to document a bit Grant Searle adapter

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