jrok
Well-known member
Hey All,
So after helping work on a faulty Berzerk and playing "which board and what bit is broken next ?!" I was encouraged to look at replacing all the boards, and the wonderful interconnects, with a single solution. So this was born....
https://www.youtube.com/watch?v=q7lx1kAFtTU
It's JAMMA and the idea is that it'll plug into the power and RCR board, replacing everything else.
It isn't just an emulation board using a hack of mame, it's running on a z80 and the FPGA reproduces the rest of the original board hardware. The concept being to match the timing of the original precisely.
That's including the wait states on accessing video RAM & I/O, plus matching interrupt timings. So in real terms it runs like the original.
The Speech processor is all handled by the FPGA and is based on the original published patents and awesome writeup by Jonathan Gervaryahu.
The board in the video is a fully functional prototype, the software and FPGA are complete and it's just up to some testing to make sure I've not missed anything.
If there's enough interest I'd like to do a run of them. Pricing would be right around $175, possibly a little less.
- James
So after helping work on a faulty Berzerk and playing "which board and what bit is broken next ?!" I was encouraged to look at replacing all the boards, and the wonderful interconnects, with a single solution. So this was born....
https://www.youtube.com/watch?v=q7lx1kAFtTU
It's JAMMA and the idea is that it'll plug into the power and RCR board, replacing everything else.
It isn't just an emulation board using a hack of mame, it's running on a z80 and the FPGA reproduces the rest of the original board hardware. The concept being to match the timing of the original precisely.
That's including the wait states on accessing video RAM & I/O, plus matching interrupt timings. So in real terms it runs like the original.
The Speech processor is all handled by the FPGA and is based on the original published patents and awesome writeup by Jonathan Gervaryahu.
The board in the video is a fully functional prototype, the software and FPGA are complete and it's just up to some testing to make sure I've not missed anything.
If there's enough interest I'd like to do a run of them. Pricing would be right around $175, possibly a little less.
- James



