C103253 REV.5 - STFM
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rubber_jonnie
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C103253 REV.5 - STFM
And here's the C103253 REV.5 that just arrived. It's been a good day!
Interesting board, as odd RAM chips. This board did come with a SIMM adaptor that sits atop the MMU and has a shifter adaptor, but I've removed that for the purposes of the picture. You can see a jumper on there for the adaptor, I left this on so I know where it goes, and it isn't getting in the way.
I will attempt to get running with no other HW fitted before I try to use the Adaptor.
DMA is a -38 and FDC is a VL1772.
EDIT 06/01/2018. The board runs after removing the RAM add in and re-soldering the resistor that had been 'jumped' elsewhere.
- IMG_20180105_130550__01.jpg (5.87 MiB) Viewed 1961 times
I will attempt to get running with no other HW fitted before I try to use the Adaptor.
DMA is a -38 and FDC is a VL1772.
EDIT 06/01/2018. The board runs after removing the RAM add in and re-soldering the resistor that had been 'jumped' elsewhere.
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk
Re: Atari Mainboard revisions
indeed the stfm is an interesting board.
As for the ste only the post 91 ones had an ajax from factory, yours is too old (89-90).
Looking back, not far, it's a really early 91 (sixth week) before the revision when the blitter was integrated in another ic.
As for the ste only the post 91 ones had an ajax from factory, yours is too old (89-90).
Looking back, not far, it's a really early 91 (sixth week) before the revision when the blitter was integrated in another ic.
If i take too long to reply, sorry my cat is sleeping on my laps.