Comments (1)
Tossing in a comment - maybe something I touch on could help. I assume your Z3 RAM is your first AutoConfig PIC in accelerator mode. I'll then assume that the Z2 FastRAM PIC follows it. I don' know if you have a PIC for the IDE interface in that sequence somewhere, but I'll assume it could be. Upon selection of the 68000 mode, you would need to check that your RAM state machine remains active against the 68000 bus (and any buffers default to facing it as a slave). You would need to shut/jump over the Z3 RAM and/or the IDE interface PICs after _reset comes up. Also, read your 0MB and 4/8 MB card size jumper. A user would likely connect a DP(DT) switch to effect their choice of mode and/or possibly size.
I dunno if there is an available jumper for it, so due to possible complexity/limitations, it may need to be effected in the firmware - one for inclusion of 68000 fallback memory, and one that does not. The presence of the AutoConfig Fast memory can throw off some poorly programmed early games.
I don't have a card, but am considering getting one with the PGA FPU layout (if anyone else is getting a few boards made). I think I have a fair number of the parts already in my spares collection.
from amiga-n2630.
Related Issues (18)
- IDE PIO Mode Support HOT 3
- FPU Test HOT 1
- Test DMA HOT 2
- Confirm function of Zorro 2 RAM at 50MHz HOT 2
- Confirm function of Zorro 3 RAM at 50MHz HOT 1
- Implement 68030 Burst Mode with Zorro 3 RAM HOT 1
- Create Mounting Bracket HOT 1
- Cannot disable IDE port HOT 1
- Create sub-revision supporting PGA 68882 HOT 1
- Crashes with A2091 HOT 1
- Original German A2000 & SDRAM Refresh HOT 7
- CPU Menu Erratic HOT 1
- Problem with many ZorroII Cards HOT 15
- Documentation Items HOT 1
- N2630 is not compatible with Agnus 8371 HOT 5
- Zorro 3 RAM autoconfig not disabled HOT 1
- Prelude cards are working - you can add it to the list HOT 1
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from amiga-n2630.