Showing changes from revision #3 to #4:
Added | Removed | Changed
Entry | |
---|---|
R0 | Reason code |
All other registers dependent on reason code |
Exit | |
---|---|
R0 | Preserved |
All other registers dependent on reason code |
The purpose of this call is to provide a number of general operations.
The action performed depends on the reason code value in R0.
# | Hex # | Action |
---|---|---|
0 | &00 | Read line from input stream |
1 | &01 | Read system clock |
2 | &02 | Write system clock |
3 | &03 | Read interval timer |
4 | &04 | Write interval timer |
7 | &07 | Make a SOUND |
9 | &09 | Read pixel logical colour |
10 | &0A | Read a character definition |
11 | &0B | Read palette |
12 | &0C | Write palette |
13 | &0D | Read current and last graphics cursors |
14 | &0E | Read CMOS clock |
15 | &0F | Write CMOS clock |
21 | &15 | Define pointer and mouse parameters |
22 | &16 | Write screen base address |