Directory name starts with the board part number. Same for the .IMG + IC-id + CRC.


MkI_17-87 (top most directory of A812 Mk1 17/87 full set firmware)

+- 1.811.774.23-TAPE_DECK_CONTROLLER (TD controller EPROM)

+- 1.811.786.21-MP-UNIT_MASTER (MPU board EPROMs)

+- 1.820.763.24-CAPSTAN_CONTROL_UNIT (capstan controller board EPROM)


To my knowledge, the below are common to A812 Mk1 and Mk2:


1.820.774.xx-CAPSTAN_MOTOR_DRIVE_AMP directory for capstan motor drive board

1.811.772.xx-SPOOLING_MOTOR_CONTROLER


Common to A810/A812/A816/A820:

1.820.724.00-MS_SWITCH

A810/A812/A816/A820 share same hardware and PROMs for M/S switch