*** M E M O R U M ***

By the way, I wrote REZROM2.COM today. Its the software for loading the "ROM" content, and configuring it. The hardware supports non-subpaged (single fixed 8KB) ROM 2, or 16 subpages (in a manner that is compatible with the original 16 subpage ROM 2 card. Note, most ROMs weren't subpaged. ...

I wonder if the MAGROM software could be tweaked to run in a regular 16 subpage x 8KB ROM 2 card.

If so, would run in MEMU and REMEMOrizer without modification.

I'm thinking a ROM 2 card with 16 subpages probably could be a 128KB ROM, GAL and latch.

By the way, I'm not suggesting MAGROM isn't interesting. But clearly, people can lay their hands on the real thing. And the games can be played on MEMU already. Speculator was more interesting, as they appear to be rarer than red MTXs, and having one enables 20 new Spectrum games (or more if Tonys s...

On the plus side, I think its an interesting idea. On the minus side, as you say, probably of limited interest to most. There is a trade off: the cost of a general API makes sense if there are lots of new hardware devices in the pipeline. If there are few enough that the interesting ones get adopted...

I forget the details, but I think the card in the FDX with the boot ROM and ribbon connector doesn't address the ROM properly. We should be able to put 2 8KB images (ROM 4 and 5) in a 16KB chip. Instead of decoding R0 to pick the lower or upper 8KB it decodes an address bus signal. I think fixing th...

The address mapper bipolar PROM in my one-off special SDX had a page mapping mismatch. Either, this is a one-off mistake in just this machine. Or, there could be others, perhaps Memotech Business/2 machines, with the same problem. If there are, no problem, my "SDX Plus" upgrade can address...

MTX500 address decoder PAL makes some of the 32KB memory appear in extra unwanted places in the memory map. This clashes with where memory upgrades (eg: official RAM upgrade board, MTX Memory Card, REMEMOrizer) make the extra memory appear. So prior to upgrading memory on an MTX500, this PAL has to ...

SDX ROM for type B:07,C:07 drives has bug in check and allocation vectors (insufficient space for them, so they overlap). Without this fixed, I can't save anything - BDOS Err R/O. In FDXB, you need to DISC DIR "" before DISC SAVE to avoid disk corruption. FDXB has numerous other bugs/limit...

http://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&CategoryNo=53&No=83 is the DE1 page. Might be interesting to watch this page over the next month or two. Terasic have now released a later replacement DE1 SoC board for slightly more $. So we might expect they'll need to lowe...

Have been peering inside FDXB. It seems I have 2 variants. One which only talks to the FDX FDC. One which only talks to the SDX FDC. (so it appears I lied above, ooops) I've therefore renamed the latter SDXB.COM, as it only works on SDX. SDX BASIC loads CP/M from the floppy and patches/relocates it....