IBM AT 5170 Technical Reference page 197

Keyboard BIOS ..•.•.••.......••••.••.••...•..•• 5-129
Printer BIOS ............••..•..........•••..... 5-138
RS232 BIOS ................................... 5-140
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Video BIOS .................................... 5-143
BIOS ...••....•.......••..•.................. 5-161
Memory Size Determine ....................... 5-161
Equipment Determine ......................... 5-161
NMI ...................................... 5-162
BIOSI. . ...................................... 5-163
Event Wait ................................. 5-164
Joystick Support ............................. 5-165
Wait ...................................... 5-166
Block Move ................................ 5-167
Extended Memory Size Determine ............... 5-172
Processor to Virtual Mode ..................... 5-174
BIOS2 ....................................... 5-176
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Time of Day ................................ 5-176
Alarm Intermpt Handler ....................... 5-179
Print Screen ................................. 5-180
Timer 1 Interrupt Handler ...................... 5-181
ORGS - PC Compatibility and Tables •••.•.......•••• 5-182
POST Error Messages ......................... 5-182
System BIOS 5-25