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Hellat.r
Mode of Operllion
Mill.
P,rt
Ild.1
0
1
2
3
4
5
6
7
0
E
F 10 F! 10: 0* 1 * 2* 3*
Address Reg
3?4
-
-
-
-
-
- -
-
-
-
-
-
-
-
-
-
-
-
-
Horiz Total
3?5
00
37 37 70 70 37 37 70 60 37 70 60 5B 60 5B 2D 2D 5B 5B
Hrz Disp End
3?5
01
27 27 4F 4F 27 27 4F 4F 27 4F 4F 4F 4F 4F 27 27 4F 4F
Strt Hrz Blk
3?5
02
2D 2D 5C 5C 2D 2D 59 56 2D 56 56 53 56 53 2B 2B 53 53
End Hrz Blk
3?5
03
37 37 2F 2F 37 37 2D 3A 37 2D 1A 17 3A 37 2D 2D 37 37
Strt Hrz Retr
3?5
04
31 31 5F 5F 30 30 5E 51 30 5E 50 50 50 52 28 28 51 51
End Hrz Retr
3?5
05
15 15 07 07 14 14 06 60 14 06 EO BA
6e 00 6D 6D 5B 5B
Vert Total
3?5
06
04 04 04 04 04 04 04 70 04 04 70 6C 70 6C 6C 6C 6C 6C
Over1low
3?5
07
11 11 11 11 11 11 11 1F 11 11 1 F 1F 1F 1F 1F 1 F 1 F 1 F
Preset Row SC
3?5
08
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Max Scan Line
3?5
09
07 07 07 07 01 01 01 OD 00 00 00 00 00 00 OD OD OD OD
Cursor Start
3?5
OA
06 06 06 06 00 00 00 OB 00 00 00 00 00 00 DB DB DB OB
Cursor End
3?5
DB
07 07 07 07 00 00 00 DC 00 00 00 00 00 00 OC DC DC OC
Strt Addr Hi
3?5
OC
-
-
-
-
- -
-
-
-
-
-
-
-
-
-
-
-
-
Strt Addr Lo
3?5
OD
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
?
=
B in monochrome modes
?
=
D in color modes
·Values for these modes when the IBM Enhanced Color Display is attached
:Values for these modes when greater than 64 K Graphics Memory is installed
CRT Controller Registers (1 of 2)
64 IBM Enhanced Graphics Adapter
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