ROM
Submitted by Dan Dooré on Sun, 2006-05-14 13:23.
Written by Dr Andy Wright there were several ROM vesions 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 |
| 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. |
See Rom bugs for more info.
Varients
| Version | Source | Details |
|---|---|---|
| ROM 3.0 | MGT | There are apparently 2 versions of ROM 3.0 in the wild: The original had ‘plc’ in lower case on the Splash screen, another one had ‘PLC’ in uppercase. (from Edwin Blink) |
| ROM 3.1 | MGT | Has ‘PLC’ rather than ‘plc’ but that (and the version number) is the only difference. Listed at http://zxspectrum.it.omegahg.com/MG.htm |
| SCAutoboot | 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, replacement of keyword “DIR” with “CAT” 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. |
Trivia:
The current ROM version can be ascertained by typing PRINT PEEK 15 and dividing by 10 so 30 is ROM 3.0
