Video Input/Output Function Codes - Zenith Z-100 Reference Manual

Page 7.34
Video Graphics Programming
Table 7.17.

Video Input/Output Function Codes

REGISTERS
FUNCTION
AFFECTED
CODE
AL
0 I
CH, CL
DH, DL
DH, DL, CH, CL
2 3 4 5 6 7 AH, DH, DL, CH, BH, BL
AL
AL, BH, CH, CL, DH, DL
AL, BH, CH, CI DH, DL
AH,AL, BH
AL, BH, BL, CH, CL
8 9 1 0
AL, BH, CH, CL
BH, BL
11
AL, CH, CL, DH, DL
12
13 AL, CH, CL, DH, DL
14 AL, BH, BL
15 AH, AL, BH
100 AL
The following paragraphs describe the detailed use of the previously defined video
functions.
OPERATION
Set screen mode
Set cursor type
Set cursor position
Read cursor position
Read light pen position
Select active display page
Scroll an area of screen up
Scroll an area of screen down
Read cursor position
Send character/attribute to screen
Send character to screen
Set graphics foreground color
Write graphics pixel
Read graphics pixel
Dumb terminal display
Returns current video state
Set scroll mode