Description
Written by Andy Wright there were several ROM versions during the Sam’s lifecycle:
| Version | Source | Details |
|---|---|---|
| ROM 0.1 | MGT | Original prototype 07-Nov-89 |
| ROM 0.4 | MGT | Pre release version 04-Dec-89 |
| ROM 1.0 | MGT | Original shipped ROM |
| ROM 1.1 | MGT | Pre release version |
| ROM 1.2 | MGT | Pre release version |
| ROM 1.3 | MGT | Pre release version |
| ROM 1.4 | MGT | Pre release version |
| ROM 1.8 | MGT | Pre release version |
| ROM 1.81 | MGT | Pre release version |
| ROM 2.0 | MGT | Amended ROM to fix bugs with disk bootstrap, shipped to users with an update for the MGT Utility Tapes |
| ROM 2.1 | MGT | Pre release version |
| ROM 2.4 | MGT | Pre release version |
| ROM 2.5 | MGT | Pre release version |
| ROM 3.0 | MGT | Last official release, source code on github. |
See Rom bugs for more info.
Variants
| Version | Source | Details |
|---|---|---|
| ROM 3.0 | MGT | There are 2 versions of MGT ROM 3.0 in the wild: The original had ‘plc’ in lower case on the Splash screen, another one had ‘PLC’ in uppercase. |
| ROM 3.0 | SamCo | Identical to version 3.0 but with Sam Computers Ltd 1991 on splash screen. Dumped by Robert Morrison. |
| ROM 3.1 | MGT | Identical to version 3.0 except for a single byte at 0x0F for version number (31/0x1F rather than 30/0x1E) and has ‘PLC’ rather than ‘plc’ but that (and the version number) is the only difference. Hosted by Davide Barlotti https://speccy4ever.speccy.org/_MG.htm |
| SC_Autoboot | Steve Nutting | Amended V3.0 with fast reset and ‘Instant F9’ |
| ROM 3.5 | West Coast Computers | Used in the Sam élite, a V3.0 with a new copyright message and spelt ‘disk’ with ‘c’ |
| Homing PROM | Simon Cooke | V3.0 with a custom-orderable copyright message. |
| HD Boot ROM | Edwin Blink | V3.0 with code to boot from ATOM Hard drive’s boot sector. |
| Trinity Boot ROM | Colin Piggot | V3.0 with code to boot from Trinity Ethernet Interface EEPROM. |
| ROM v4.0 | Anton Javorček | V3.0 with bug fixes, quality of life updates and ability to boot from mass storage. |