Specifications

D:\D\inter61a\INTERRUP.A Saturday, January 08, 2011 11:31 AM

Return: AX = ??? (1300h)

SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AX=130Eh

--------G-030900-----------------------------

INT 03 - Soft-ICE v2.80 - BACK DOOR COMMANDS - ???

AX = 0900h

SI = magic value 4647h ('FG')

DI = magic value 4A4Dh ('JM')

Return: none???

SeeAlso: INT 03/AX=0000h,INT 03/AX=0910h,INT 03/AH=10h,INT 03/AH=12h

--------C-04---------------------------------

INT 04 C - CPU-generated - INTO DETECTED OVERFLOW

Desc: the INTO instruction will generate this interrupt if OF (Overflow Flag)

is set; otherwise, INTO is effectively a NOP

Note: may be used for convenient overflow testing (to prevent errors from

propagating) instead of JO or a JNO/JMP combination

SeeAlso: INT 00"CPU",OPCODE "AAD",OPCODE "AAM"

--------B-05---------------------------------

INT 05 - PRINT SCREEN

Desc: dump the current text screen to the first printer

Notes: normally invoked by the INT 09 handler when PrtSc key is pressed, but

may be invoked directly by applications

byte at 0050h:0000h contains status used by default handler

00h not active

01h PrtSc in progress

FFh last PrtSc encountered error

default handler is at F000h:FF54h in IBM PC and 100%-compatible BIOSes

since the BOUND instruction also calls INT 05h, but returns control

to the BOUND instruction, a failed BOUND check will cause an infinite

loop of PrtScreens unless the INT 05 handler is aware of the problem

and checks whether the interrupt was invoked by a BOUND instruction

BUG: some old BIOSes/applications appear to destroy BP on return

SeeAlso: INT 10/AH=12h/BL=20h,INT 4A"Tandy 2000",INT 5E"TI Professional"

SeeAlso: INT 80"Phar Lap"

--------C-05---------------------------------

INT 05 C - CPU-generated (80186+) - BOUND RANGE EXCEEDED

Desc: generated by BOUND instruction when the value to be tested is less than

the indicated lower bound or greater than the indicated upper bound.

Note: returning from this interrupt re-executes the failing BOUND instruction

--------P-05454A-----------------------------

INT 05 U - PSPS v2.01 - EJECT PAGE

AX = 454Ah ('EJ')

-13-

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