Table of Contents
Note: This IBM PC BIOS API call is for DOS/Win16 personality only. Use Family API for portability.
Note: osFree Macro Library provides macros for most of functions
Int 10H, AH=0FH
Version
IBM 5150 and higher
Brief
Get video mode/status
osFree Macro Library
Family API
Parameters
- AH = 0Fh
Return
- AH = number of character columns
- AL = display mode (see #00010 at AH=00h)
- BH = active page (see AH=05h)
Macro
INCLUDE BIOS.INC @GetMode @VideoState
Notes
- if mode was set with bit 7 set (“no blanking”), the returned mode will also have bit 7 set
- EGA, VGA, and UltraVision return either AL=03h (color) or AL=07h (monochrome) in all extended-row text modes
- HP 200LX returns AL=07h (monochrome) if mode was set to AL=21h and always 80 resp. 40 columns in all text modes regardless of current zoom setting (see AH=D0h)
- when using a Hercules Graphics Card, additional checks are necessary:
- mode 05h: if WORD 0040h:0063h is 03B4h, may be in graphics page 1 (as set by DOSSHELL and other Microsoft software)
- mode 06h: if WORD 0040h:0063h is 03B4h, may be in graphics page 0 (as set by DOSSHELL and other Microsoft software)
- mode 07h: if BYTE 0040h:0065h bit 1 is set, Hercules card is in graphics mode, with bit 7 indicating the page (mode set by Hercules driver for Borland Turbo C)
- the Tandy 2000 BIOS is only documented as returning AL, not AH or BH
- Text based on Ralf Brown Interrupt List Release 61
| IBM PC BIOS API | |
|---|---|
| Video I/O | INT 10H: 00H, 01H, 02H, 03H, 05H, 06H, 07H, 08H, 09H, 0AH, 0BH, 0CH, 0DH, 0EH, 0FH |
| Hardware info | INT 11H, INT 12H |
| Serial I/O | INT 14H: 00H, 01H, 02H, 03H |
| Tape I/O | INT 15H: 00H, 01H, 02H, 03H |
| Keyboard I/O | INT 16H: 00H, 01H, 02H |
| Printer I/O | INT 17H: 00H, 01H, 02H |
| Disk I/O | INT 13H: 00H, 01H, 02H, 03H, 04H, 05H |
| Date and Time | INT 1AH: 00H, 01H |
| osFree Macro Library | |
|---|---|
| Video I/O | @SetMode @SetCurSz @SetCurPos @GetCur @SetPage @ScrollUp @ScrollDn @Scroll @GetChAtr @PutChAtr @PutCh @SetPalet @SetColor @SetDot @GetDot @WrtTTY @VideoState @GetMode @GetDisplay @GetVideoState @GetEGAInfo @Cls |
| Hardware info | @Equipment @MemSize |
| Serial I/O | @AuxInit @AuxSendChar @AuxRecieveChar @AuxStatus |
| Tape I/O | @TapeOn @TapeOff @TapeRead @TapeWrite |
| Keyboard I/O | @KbdStatus @CharIn @CharPeek |
| Printer I/O | @PrnPrint @PrnInit @PrnStatus |
| Disk I/O | @DskReset @DskStatus @DskRead @DskWrite @DskVerify @DskFormat |
| Date and Time | @SetTime @GetTime |
| Mouse | @MouInit @MouShowPointer @MouStatus @MouSetPos @MouSetMickey @MouRegion |
| Memory manager | @ModBlok SET_BLOCK |