IBM XT 5160 - Page 209

IBM Persona I Computer MACRO Assemb I er Vers i on 2.00
VIDEO ---- 01/10/86 VIDEO DISPLAY BIOS
1-1
01-10-86
V IDEO 10
-THESE ROUT I NES PROV I DE THE CRT 0 I SPLA Y INTERFACE
THE FOLLOW I NG FUNCT IONS ARE PROV IDEO:
SPEAKER BEEP ROUT I NE
CHARACTER GENERATOR
GRAPHICS TABLE
LOAD (OS) WITH OATA SEGMENT SELECTOR
REGEN BUFFER LENGTH TABLE
COLUMNS PER MODE TABLE
MODE SET VALUE PER MODE TABLE
SET MODE (AL I CONTA I NS MODE VALUE
(ALl = OOH 40X25 BW MODE (POWER ON DEFAUL Tl
(ALl = 01 H 40X25 COLOR
(AL) = 02H 80X25 BW
(ALl = 03H 80X25 COLOR
GRAPH I
CS MODES
(AL) = 04H 320X200 COLOR
(AL) = 05H 320X200 BW MODE
(AL) = 06H 640X200 BW MODE
(ALl = 01H 80X25 MONOCHROME (USED INTERNAL TO VIDEO ONLY)
••• NOTES -BW MODES OPERATE SAME AS COLOR MODES, BUT COLOR
BURST I S NOT ENABLED
-CURSOR I S NOT 0 I SPLAYED I N GRAPH I CS MODE
SET CURSOR TYPE
(CH) BITS 4-0 = START LINE FOR CURSOR
•• HARDWARE WILL ALWAYS CAUSE BLINK
•• SETT I NG BI T 5 OR 6 WILL CAUSE ERRAT I C BL I NK I NG
OR NO CURSOR AT ALL
(CLI = BITS 4-0 = END LINE FOR CURSOR
SET CURSOR POS I T I ON
(DH,DL) = ROW,COLUMN (OOH,OOH) IS UPPER LEFT
(BH) = PAGE NUMBER (MUST BE OOH FOR GRAPH I CS MODES)
READ CURSOR POS I T I
ON
(BH) = PAGE NUMBER (MUST BE OOH FOR GRAPH I CS MODES)
ON EX I T (DH, DL) = ROW, COLUMN OF CURRENT CURSOR
(CH ,
CL ) = CUR SOR MODE CURRENTL Y SET
READ LIGHT PEN POSITION
ON EXIT:
(AH) = OOH -- LIGHT PEN SWITCH NOT DOWN/NOT TRIGGERED
(AH) = 01H -- VALID LIGHT PEN VALUE IN REGISTERS
( DH , DL ) = ROW, COLUMN OF CHARACTER LP POS I T I ON
(CH) = RASTER LINE (0-199)
(BX) = PIXEL COLUMN (0-319,639)
SELECT ACT I VE 0 I SPLA Y PAGE (VALl 0 ONLY FOR ALPHA MODES I
(ALl = NEW PAGE VALUE (0-1 FOR MODES 0&1, 0-3 FOR MODES 2&3)
SCROLL ACT I VE PAGE UP
(ALl = NUMBER OF LINES, (LINES BLANKED AT BOTTOM OF WINDOW)
(AL) = OOH MEANS BLANK ENTI RE WINDOW
(CH ,
CL ) = ROW, COLUMN OF UPPER LEFT CORNER OF SCROLL
( DH ,DL ) = ROW, COLUMN OF LOWER RIGHT CORNER OF SCROLL
( BH) = ATTR IBUTE TO BE USED ON BLANK LINE
SCROLL ACT I VE PAGE DOWN
(ALl = NUMBER OF LINES, INPUT LINES BLANKED AT TOP OF WINDOW
(ALl = OOH MEANS BLANK ENT I RE WINDOW
(
CH, CL ) = ROW, COLUMN OF UPPER LEFT CORNER OF SCROLL
( DH , DL ) = ROW, COLUMN OF LOWER RIGHT CORNER OF SCROLL
( BH) = ATTR I BUTE TO BE USED ON BLANK LINE
BEEP:NEAR
CRT CHAR GEN: NEAR
DDS:NEAR-
M5:WORD
M6:BYTE
M1:BYTE
EXTRN
EXTRN
EXTRN
EXTRN
EXTRN
EXTRN
(AH) = 05H
(AHI = 06H
(AH) = 03H
(AH) = 02H
I NT 10 H - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - -- -- - - -- --- ---- - - - - ---
:
:
:
:
:
:
:
:
(AHI = 01H
(AH) = OIH
(AHI = 04H
(AHI = OOH
CHARACTER HANDL I NG ROUT I NES
(AHI = 08H READ ATTRIBUTE/CHARACTER AT CURRENT CURSOR POSITION
(BHI = DISPLAY PAGE (VALID FOR ALPHA MODES ONLY)
ON EXIT:
( AL ) = CHAR READ
(AH) = ATTR IBUTE OF CHARACTER READ (ALPHA MODES ONLY)
( AH) = 09H WR I TE ATTR IBUTE / CHARACTER AT CURRENT CURSOR POS I T I ON
(BH) = DISPLAY PAGE (VALID FOR ALPHA MODES ONLY)
PAGE I 18, 121
TITLE VIDEO ---- 01/10/86 VIDEO DISPLAY BIOS
.LI ST
CODE SEGMENT
BYTE PUBL I C
PUBL I C ACT 0 I SP PAGE
PUBL I C REAO AC CURRENT
PUBL I C READ-CURSOR
PUBL I C READ-DOT
PUBL I C READ-LPEN
PUBL I C SCROLL DOWN
PUBL I C SCROLL-UP
PUBL I C SET COLOR
PUBL I C SET-CPOS
PUBL I C SET-CTYPE
PUBL I C SET-MODE
PUBL I C WR I TE AC CURRENT
PUBL I C WR I TE-C CURRENT
PUBL I C WR I TE-DOT
PUBL I C WR I TE-TTY
PUBLIC VIDEO-IO 1
PUBLI C V IDEO:STATE
PUBL I C SET MODE
PUBL I C SET-CTYPE
PUBL I C SET-CPOS
PUBLI C REAO CURSOR
PUBL I C READ-LPEN
PUBLI C ACT 01 SP PAGE
PUBL I C SCROLL UP
PUBL I C SCROLL-DOWN
PUBL I C READ AC CURRENT
PUBL I C WR I TE AC CURRENT
PUBL I C WR I TE-C CURRENT
PUBL I C SET COLOR
PUBLIC WRITE DOT
PUBL I C READ OOT
PUBLIC WRITE TTY
PUBLIC VIDEO-STATE
PUBL I C V IDEO-RETURN
PUBL I C V IDEO-RETURN
PUBL I C V IDEO-RETURN
PUBL I C WR I TE:STR I NG
1
2
3
4 0000
5
6
1
8
9
10
11
12
13
14
15
16
11
18
19
20
21
22
23
24
25
26
21
28
29
30
31
32
33
34
35
36
31
38
39
40
41
42
43
44
45
46
41
48
49
50
51
52
53
54
55
56
51
58
59
60
61
62
63
64
65
66
61
68
69
10
11
12
13
14
15
16
11
18
19
80
81
82
83
84
85
86
81
88
89
90
91
92
93
94
95
96
91
98
99
100
101
102
103
104
105
106
101
108
109
110
111
112
113
114
5-62 VIDEO (01/10/86)