Registers at call
Return Registers
Notes
Supported Models
Registers at call:
AH = 22h
Return Registers:
CF set on error
AH = 86h: Function not supported
CF clear if successful
AX = 0000h
ES:BX -> ROM BASIC Location
Notes:
This call is for "Later PS/2s". Earlier PS/2s (as well as the older IBM PC family) will fail this call, but have ROM BASIC at F600h:0000h. A test for the presence of the BIOS string "C1.10 1981" at this location would be checked first, and if ROM BASIC is not found there, then issue the call. If the call also fails the system does not have ROM BASIC.