I'm currently working on the following Falcon and this will be my service blog. This board is rather interesting with some bodge wires on the board, which are Atari fitted. Also it is fitted with a very old TOS 4.01 which I've personally never seen before, rather exciting
As you can see from the TOS screenshot, it boots with a dithered green background (with no floppy or hdd) which made me wonder, since Falcons usually boot with a blueish background. Also it did not seem to have any of the '3D' windows that Falcon TOS usually has. So I removed the RAM module and found 4.01 stamped on the ROM. Cool stuff. @mikro
We plan to:
- Re-cap motherboard
- Fit EXXOS PSU
- Fit Exxos clock patch
- Replace NVRAM with Exxos module
- New CF card IDE
- New Fan
- New fast TOS 4.04
- Wait states removal
- Resolder ports
- Clean floppy drive
- And a general clean as she is a dusty old girl
B52803000012
B5 = First batch
28 = October 1992, first production month
0 = Pilot production
3 = PALB
000012 = Apparently the 12th unit produced
Link to history.