Instruction Manual
11
96
Going to do any initialization before C800 optional ROM control.
97
Any initialization before C800 optional ROM control is over. Optional
ROM check and control will be done next.
98
Optional ROM control is done. About to give control to do any
required processing after optional ROM returns control.
99
Any initialization required after optional ROM test over. Going to
setup timer data area and printer base address.
9A
Return after setting timer and printer base address. Going to set the
RS-232 base address.
9B
Returned RS-232 base address. Going to do any initialization before
coprocessor test.
9C
Required initialization before coprocessor is over. Going to initialize
the coprocessor next.
9D
Coprocessor initialized. Going to do any initialization after
coprocessor test.
9E
Initialization after coprocessor test is complete. Going to check
extended keyboard, keyboard ID and num-lock.
9F
Extended keyboard check is done, ID flag set, and num-lock on/off.
Keyboard ID command to be issued.
A0
Keyboard ID command issued. Keyboard ID flag reset.
A1
Keyboard ID flag reset. Cache memory test to follow.
A2
Cache memory test over. Going to display any soft errors.
A3
Soft error display complete. Going to set keyboard typematic rate.
A4
Keyboard typematic rate set. To program memory wait states.
A5
Memory wait states programming over. Going to clear the screen and
enable parity/NMI.
A7
NMI and parity enabled. Going to do any initialization required before
giving control to optional ROM at E000.
A8
Initialization before E000 ROM control over. E000 ROM to get control
next.