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

Needing a bit of a clean, but otherwise complete. The prevoulsy FDX single is now a FDX CPM twin using 2 x Flashfloppy modified Gotek drives. The 5 1/4" bay adaptors were 3d printed as were the red end plates to match the function keys. The 80 column display is courtesy of a custom CPLD design ...

Something I just remmebered, the colour of the VGA cursor changes with the system activity. Having just looked at Andy's VHDL to refresh my memory. Green is linked to the reset Red is linked to MISO, so will flicker if there's disc activity Blue is linked to the ROMS pin. So if the cursor is purple ...

Checking Andy's site 2_32 was for a 2 rom MTX500, so 2_00 is likely for a 2 rom MTX with busted ram. The A rom only on the 2 Rom board needed removing Both jumpers "high" would be the correct setting for replacing the roms and ram. The MTX memory test is pretty much the only thing thats do...

Were the original 74LS logic chips duff in some way? They were. The MTX couldn't even boot with the FDC board plugged in until the LS244s were replaced. They're the chips at A1 and B1 on the board, the schematic shows that they buffer and isolate the 4 LS191 counters that store the floppy drive DMA...

SO, the process here turned out to be: Program the Gotek to the latest FlashFloppy 3.39. Set the Gotek to Drive zero, no other jumpers set. Unzip and copy the CF.CFG file below to the root of the USB stick Copy any suatable sized 59k CPM bootable disc image to the USB stick, 320K in my case, file ex...

This UK Computer museum/retro youtube channel "The Cave" has released a new video that includes a quick test of a couple of donated MTXs https://www.youtube.com/watch?v=vw8z5Hz9-iw The 500 worked, the 512 back screened. What's interesting is there's a quick view of a computer listing cave ...

There was a typo issue** with mapping the 512k ram in the first draft of the memory decode GAL. That was cured before the MFX went to "manufacturing". The issue resulted in duplication or some of the paged memory and would be apparent as corruption in a ram disc with more than 128k or so o...

I've been having a chat with Dave about the best things about the MTX. The game selection probably isn't the prime reason for picking up an MTX these days, that would be the hardware, but what would the top 5 games (or top 10 maybe) games be. I had a think of the games I played a lot and made the mo...

The advantage of buying later, your's probably didn't break within a few months and end up going off to Memotech (and probably Jim) to repair!

I got my original 512 in December '83.

The old bank statement I found shows the cheque cleared on 20/12/83!