Atari ST motherboard revisions
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Atari ST motherboard revisions
The Atari ST went through a fair amount of revisions during its lifetime.
Please feel free to upload a picture of your motherboard
| Model Number | Revision | Model | Add-ons | Photo | Notes | Submitted by |
| C070243 | H | 520 ST | ? | Separate Floppy/PSU, On-main-board mouse/joystick, No support for 2-chip TOS | ppera | |
| C070243 | I | 520 ST | ? | As H. Support for 2-chip TOS | ppera | |
| C070523-001 | D | ? | 20Mhz processor, Autoswitch overscan, 4MB memory, TOS 1.4/Kaos switch, HD/ED Floppy, High speed serial | ? | Nyh | |
| C070789-001 | B | 520 STFM | None | ? | roy strange | |
| C070789-001 | C | 520 STFM | None | ? | insanity | |
| C103088/C103253 | 3/1 | 520 STFM | None | ? | roy strange | |
| C103414-001 | 1 | 520 STFM | 1MB Upgrade | ? | Stefan jL | |
| C103414-001 | 1.1 | 520 STFM | None | Similar to Rev. 1 above but 2-chip TOS and chip in space below labelled LS11 | insanity | |
| C103175 | 1.1 | 1040 STFM | ? | 4bit RAM chips | ppera | |
| C100167-001 | 4.0 | Mega ST (4MB) | ? | Original ROMs replaced with Flash EPROMs | ppera |