Done with a T48 USB Programmer.
References:
- U110: MMI 6349-1J
- U252: Fujitsu MBM2732A-30
- U413: MMI 6301-1J
- U416: Fujitsu MBM2732A-30
- U603: MMI 6301-1J
Markings:
- U110: nothing
- U252: "Rev D"
- U413: "012 A"
- U416: "CG 500"
- U603: "011 A" + "2" on sticker
BPROMs were read as 2716 using the following adapter: https://www.pcbway.com/project/shareproject/BPROM_Read_Adapter_v0_2_21in1_efbb783f.html https://team-europe.blogspot.com/2022/06/bprom-read-adapter-v02-21in1.html
The dumps were then truncated to the right size using truncate on Linux.
Because U603 had a leng bent and soldered to another, I could not re-bend the leg as it would likely break. I removed the solder between the two legs, put heatshrink to isolate the bent leg and then added a temporary leg salvaged from a dead resistor array.
Pictures of this setup are in ../pic.
Also present are dumps from:
- Bitsavers
- Don Maslin's archive
- Santo, from retrocomputer.ca
- Unknown source, Rev H from a MAME BIOS dump
The one from Don Maslin's are identical to Rev F on bitsavers.
| Marking | Role | Version | Source | MD5 |
|---|---|---|---|---|
| U110 | Addressing | - | Bitsavers & Alto | 96c6dc408701904ad929c7ec9211a7ca |
| U252 | Boot ROM | D | Altomare | 2db2b51c07f2412b51531a3d4c3c21b1 |
| ^ | ^ | F | Bitsavers & Maslin | f9975873e30494aae32c8cb5385156a4 |
| ^ | ^ | G | Bitsavers | fdb4e89990238beabdd423f8868203b9 |
| ^ | ^ | H | Santo & MAME | 29b42cb020ce64b4a7e7accb5bf182db |
| U413 | Video logic | 012 A | Bitsavers & Alto | 39c7f651cab979a9ec576608675d0c91 |
| U416 | Character ROM | CG 500 | * | 346258b1cc3e3e88fa7e7e0b6a1984e7 |
| U603 | Floppy logic | ? | Bitsavers | 66bab56ccd7aeaba863f99ed0a2ede0c |
| ^ | ^ | 011 A 2 | Altomare | 32fdaa5a4f23d858cf3578df0564e145 |
Not included (yet) are the 8-16 card dumps.
Santo's boot ROM was on a 8KB ROM, but the second half is all zeros The first half is identical to the MAME dump.