Radio Shack CCR-81 Operation Manual

Computer Graphics Operation Manual
TRS-BO@
.. ~
~fHU8
JR
NZ,BIT
~~~49
POP BC
~gg5g
DJNZ
BYTE
~gg5l
~gg52
LD A, 240'
ggg53
CP C iLast
Y address?
ggg54
JR Z, DONE
0'0'0'55
SLA
D
iNext
bit in buffer
ggg56
JP
P,NEWRW
~gg57
~gg58
CALL PRINT
iPrint buffer
ggg59
JR
NEWLN
~gg6g
·
,
~gg6l
DONE
CALL PRINT
ggg62
LD
A,~FCH
ggg63
OUT
(STATUS) ,A
~gg64
LD HL,EGMODE
iTurn off graphics print
ggg65
LD B,l
0'0'0'66
LD
c,,0DH
ggg67
CALL
PRLINE
~gg68
POP IX
~gg69
POP
BC
~gg7g
POP DE
ggg71
POP HL
,0gg72
XOR A
,0gg73
RET
ggg74
·
,
,0gg75
PRINT
PUSH BC
0'0'0'76
LD DE,,0
iOffset for print buffer
0'0'0'77
PART
LD
HL,BUF
0'0'0'78
ADD HL,DE
~gg79
XOR A
ggg8~
CP
(HL)
iEnd of buffer?
0'0'0'81
JR Z,EPRT
0'0'0'82
LD
BC, (CTL)
0'0'0'83
CALL PRLINE
~gg84
LD HL,214
0'0'0'85
ADD HL,DE
iNext part of buffer
~gg86
EX
DE,HL
~gg87
JR PART
~gg88
EPRT
POP BC
~gg89
RET
0'0'0'90'
·
,
.00'0'91
PRLINE
EQU $
iPrint a line. HL==>line to print
0'0'0'92
PUSH
DE
ggg93
PRL2
LD
A, (HL)
iB =
# characters to print
0'0'0'94
INC HL
iC =
EOL char (sent after line)
~gg95
CALL
3BH
iHL, BC, AF, and DE used
0'0'0'96
DJNZ PRL2
---------lIadlOlllaell---------
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Radio Shack CCR-81 Specifications

General

Brand	Radio Shack
Model	CCR-81
Category	Desktop
Language	English