Atari ST motherboard revisions
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. Please keep your photo to 1.5 MB, thanks.
Model Number | Rev | Model | Add-ons | Photo | Notes | Submitted by |
---|---|---|---|---|---|---|
C070115 | 2 | 520 ST | ? | jokker | ||
C070243 | C | 520 ST+ | ? | Factor6 | ||
C070243 | E | 520 STM | None | galax | ||
C070243 | F | 520 STM | ? | firyembers | ||
C070243 | H | 520 STM | ? | PAL 520STM, thought to be original. Looks to have been made in early to mid 1987 - sticker (Silica Shop? My STFM had the same type) on the bottom said 12/87 so it may have sat in inventory for a bit. | Dio | |
C070243 | H | 520 STM | ? | Separate Floppy/PSU, On-main-board mouse/joystick, No support for 2-chip TOS | ppera | |
C070243 | I | 520 STM | ? | As H. Support for 2-chip TOS | ppera | |
C070523-001 | C | 1040 STF | None | Another with TOS under the PSU. Makes changing TOS very tedious. | 1632 | |
C070523-001 | D | 1040 STF | None | Swedish TOS. | Zhylo | |
C070523-001 | D | ? | 20Mhz processor, Autoswitch overscan, 4MB memory, TOS 1.4/Kaos switch, HD/ED Floppy, High speed serial | Nyh | ||
C070523-001 | D | ? | ? | Ram chips in a row at the bottom, TOS under where the PSU normally sits | exxos | |
C070523-001 | D | 520 STFM | 4MB Upgrade | floppydood | ||
C070523-001 | D | 520 STFM | None | PAL 520STFM, TOS 1.02, purchased 12/86 with single-sided internal drive | Dio | |
C070789-001 | B | 1040 STF | None | push2fit | ||
C070789-001 | B | 520 STFM | None | roy strange | ||
C070789-001 | B | 520 STFM | None | PAL 520STFM, late 87. Not quite original; has a yellow/green LED keyboard but a red/red top cover, and the drive hole has been filed around, so presumably was SS and swapped to DS. Doesn't look to have any mods though. | Dio | |
C070789-001 | C | 520 STFM | None | insanity | ||
C070789-001 | C | 520 STFM | 1MB Upgrade | insanity | ||
C070789-001 | C | 520 STFM | 4MB 72pin BETA Hack & test 1.44 floppy upgrade | exxos | ||
C070789-001 | C | 520 STFM | 30pin 4MB hacked, Dual TOS, and prototype 1.44 floppy upgrade | exxos | ||
C070789-001 | D | 520 STFM | None | PAL 520STFM. Serial number indicates 1988 or 89 - surprisingly late for this board layout, the custom chips have the iMP logo. Ribbon cables are for the half meg RAM expansion. Floppy drive looks to be original and is DS. | Dio | |
C070789-001 | F | 1040 STFM | 1.44 floppy upgrade | TOS 1.04 Polish version | dazarz | |
C070859-001 | _ | 1040 STF | None | push2fit | ||
C070523-001 | C | 2080 STF | 2MB Upgrade | 2M ST YU Board | Stelios1978 | |
C100167-001 | 4.0 | Mega ST (4MB) | ? | Original ROMs replaced with Flash EPROMs | ppera | |
C100167-001 | B | Mega 4 | Blitter patch | 2 TOS ROMS | qq1975b | |
C100167-001 | 5.0 | Mega ST2 | ? | jokker | ||
C103088 C103253 | 3. 1. | 520 STFM | None | roy strange | ||
C103088 C103253 | 5. 3. | 520 STFM | None | Ram chips normally where the ROM is, ROM is under the PSU. | exxos | |
C103175 | 1 | 1040 STF | None | push2fit | ||
C103175 | 1.1 | 1040 STFM | ? | 4bit RAM chips | ppera | |
C103225 | 1 | 1040 STFM | None | dougforpres | ||
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 | |
C103414-001 | 1.1 | 520 STFM | None | SMT for MMU & GLUE, Smaller SMT RAM chips only 4 | exxos | |
C103999-001 | B | STACY | None | DarkLord | ||
C300720-001 | A | TT030 | None | krupkaj | ||
CA401146-001 | H | TT030 | None | krupkaj | ||
CA401177 | ? | STE | ? | Surface mounted 68000 CPU | Frank B | |
CA4003290 | _ | STE | ? | Small board at top, right is HD floppy circuit. There is IDE IF too, with experimental hot-swap support, therefore so many chips soldered. | ppera | |
CA4003290 | ? | STE | ? | Decky | ||
CA4003290 | _ | STE | ? | Stefan jL | ||
Unknown | ? | Mega STE | ? | ACSI-SCSI adapter is modded, and supports drives over 1GB | ppera | |
CA4003290 | _ | STE | None | The bottom side of a regular CA4003290 STE motherboard | Troed | |
C100167 | 5.0 | Mega ST4 | Blitter | No TOS installed on the pic. This revision came without a blitter from factory, added later. | Troed | |
CA400677 | F | Mega STE | None | Aftermarket 16Mhz tested 1772 with QC-sticker | Troed | |
CA400677 | F | Mega STE | None | Bottom side of the same motherboard as above. The visible patch is Atari original. | Troed | |
ExxosAlpha | 2018 | STF | None | Exxos Atari STF remake Alpha (we don't talk about this one :) ) | exxos | |
Exxos H4 | 2019/E | STF | 4MB simm, Blitter, RTC,1.44 floppy,Video DAC,VGA switch,Many ST fixes. 5x68K expansion bus. | Exxos Atari STF remake H4 mongrel edition | exxos | |
Exxos H5 | 2022/C1 | STF | 4MB simm, Blitter,RTC,1.44 floppy,Video DAC,VGA switch,Many ST fixes, 4x68K 5V & 2x 3.3V expansion bus. Midi synth. | Exxos Atari STF remake H5 | exxos |
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