Difference between revisions of "OSBYTE &F7"
(Initial page from mdfs.net.) |
m (1 revision) |
| (2 intermediate revisions by the same user not shown) | |
(No difference)
| |
Latest revision as of 19:13, 8 March 2015
OSBYTE &F7 (247) - Intercept BREAK
If this location is set to &4C (ie. a JMP instruction) then when reset
occurs the address written by OSByte &F8 and &F9 is jumped to
(RISC OS 1.00)
Define action of BREAK key
b0..b1 define action of 'break' alone
b2..b3 define action of 'shift break'
b4..b5 define action of 'ctrl break'
b6..b7 define action of 'ctrl shift break'
Each two bit value can be 00=act as a reset
01=act as the ESCAPE key
10=no effect
11=undefined
Writing to this value will also update the CMOS copy too
See Also
Jgharston 23:16, 26 May 2009 (UTC)
