Progress May - I : Some intelligence
Added 2016-05-14 16:41:02 +0000 UTCAfter losing half my hair at attempting to make AO68000 work, I gave up and followed the advice I was given: switch to TG68K.
Great news: after less than a day of work, I got it set up good enough to make the MVS system ROM (BIOS) pass the work RAM test !
It isn't that much of an achievement after all, it only means that:
- TG68K works
- NEO-C1's logic is good enough to make SROM and WRAM access work
- The read/writes to LSPC and a few other chips before the WRAM check also work
The next step is to find a way to check other access. This is a problem because the WRAM check alone requires almost an hour of simulation time.
A solution might be to patch the system ROM to skip the validated tests. In other words, split the boot process and check each part one by one.
The priority now is to order the parts for the FPGA board.
I'll try to get the BOM and order done before I leave next week. I'll be back home a bit after and will continue work on the video part.
