Radio Shack CCR-81 Operation Manual

Computer
Graphics
Operation
Manual
TRS-BO@
~~
fJfJI
: GRON
Turn on
graphics
display with
waits on
fJfJ2
fJfJ3
PSECT
fJFfJfJfJH
fJfJ4
GRON CALL
INITG
fJfJ5
LD
A,fJFFH
fJfJ6
OUT
(STATUS) ,A
fJfJ7
XOR A
fJfJ8
RET
fJfJ9
STATUS
EQU
83H
fJlfJ
.
,
fJII
:
INITG --
Initialize
Model III Graphics Board
fJl2
.
,
fJl3
INITG
PUSH HL
fJl4
PUSH
BC
fJl5
PUSH AF
fJl6
LD
A,lfJH
fJl7
OUT
(236) ,A
:Turn on
port
fJl8
LD BC,15
fJl9
LD HL,DATA
fJ2fJ
LOOP LD A,B
:Program
CRTC
chip for 8fJ by 24
fJ21
OUT
(136) ,A
fJ22
LD
A,(HL)
fJ23
OUT
(137),A
fJ24
INC HL
,/~
fJ25
INC
B
fJ26
LD A,B
fJ27
CP
C
fJ28
JR NZ,LOOP
fJ29
POP AF
fJ3fJ
POP
BC
fJ31
POP
HL
fJ32
RET
fJ33
DATA DEFB
99
fJ34
DEFB
8fJ
fJ35
DEFB
85
fJ36
DEFB
8
fJ37
DEFB
25
fJ38
DEFB
4
fJ39
DEFB
24
fJ4fJ
DEFB
24
fJ41
DEFB
fJ
fJ42
DEFB
9
fJ43
DEFB
fJ
fJ44
DEFB
fJ
fJ45
DEFB
fJ
fJ46
DEFB
fJ
fJ47
DEFB
fJ
fJ48
DEFB
fJ
fJ49
:
,,---.
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-69-

Radio Shack CCR-81 Specifications

General

Brand	Radio Shack
Model	CCR-81
Category	Desktop
Language	English