Intermec 6100 Reference Guide

R

INT 10h, Function AH = 00h:  Set Display Mode

BIOS
On Entry:

AH = 00h

AL = Display mode

0 = 40x25 B/W text

1 = 40x25 color text

2 = 80x25 B/W text

3 = 80x25 color text

4 = 320x200 color graphics

5 = 320x200 B/W graphics

6 = 640x200 color graphics

13 = 320x300 16Ćcolor graphics

14 = 640x200 16Ćcolor graphics

15 = 640x350 2Ćcolor graphics

16 = 640x350 16Ćcolor graphics

17 = 640x480 2Ćcolor graphics

18 = 640x480 16Ćcolor graphics

19 = 320x300 256Ćcolor graphics

On Return:

None

"

Start address of the REGEN buffer data item is initialized to zero.

"

crt_mode is set to the selected mode.

"

crt_cols is set to the number of columns for the selected mode.

"

page_len is set to 1000h for 80x25 modes, and 800h for 40x25 modes.

"

page_offset is set to zero for all modes.

"

cursor_loc array is initialized to zero for all modes.

"

curstype is set to 0x607 for all modes.

"

curpage is set to 0 for all modes.

"

If bit 7 of AL is set, the display buffer is not cleared.

"

Default mode is 3 (80 x 25 text color); set by the BIOS at powerĆup.

VROTATE
All requested input modes are saved in memory but no action is taken to place

the video controller in a new mode.  The screen is cleared.
On Entry:

AH = 00h

AL = Display mode (ignored)

On Return:

None