Lexicon MPX-1 User Manual

iThis routine checks the CONT and INT bits of the opcode
;and acts accordingly.
40B7 3AAOOO
40BA E680
40BC C2DC40
40BF 3AAOOO
40C2 E640
40C4 CAD340
40C7 CD1041
40CA 23
40CB 36FF
40CD 3ECB
40CF 30
40DO C3B240
40D3 CD1041
40D6 23
40D7 36FF
40D9 C3B240
CtlECK: LDA
ANI
JNZ
LDA
ANI
JZ
CALL
INX
MVI
HV1
DB
JMP
DONE: CALL
INX
HVI
JMP
CHNDBUF
80H
ATTNO
CMNDBUF
40H
DONE
PUTCHD
H
a,OFFH
A,OCBH
511'1
REARM
PUTCHO
H
H,on~'H
REARM
iCheck the CONT bit
;1f set then a successive command
;get it again
;Check the INT bit
i1£ not set
iput current addr into regs
;for status byte addr.
;set status byte in memory
iset SOD high
iThis is the main command interpreter routine. It first copies
;the LINK addr. into CURRENT and then reads in the command
;bytes. Then an indirect call is executed to the address of
;the command. It also unsets the interrupt output (500).
40DC 21B740
40DF E5
40EO 3E5F
40E2 30
40E3
3AABOO
40E6 32BOOO
40E9 3AACOO
40EC 32B100
40Elo' 3AADOO
40F2 32B200
40F5
CD4941
40F8 3AAOOO
40FB E61F
40FD 1l0F41
4100 D5
4101 210000
4104
07
4105 07
4106 FE3C
4108 C20D41
410B 3EOO
410D 6F
410E E9
410F C9
ATTNO: LXI
PUSH
ATTN: }IV I
DB
LOA
STA
LOA
STA~
LOA
STA
CALL
LOA
ANI
LXI
PUSH
LXI
RLC
RLC
CPI
JNZ
MVI
ATTN1: MOV
PCRL
BACK: RET
H,CHECK
H
A.5r'H
SIM
LINKAD
CURRENT
LINKAD+1
CURRENT+1
LlNKAD+2
CURRENT+2
GETC.l'lO
CHNDBUF
1FH
0, BACK
D
H,CMNDTBL
3CH
ATTNl
A,O
L,A
iADDRESS TO RETURN TO
;PUT ON STACK
ireset SOD and mask 7.5
;copy L1NKAD into CURRENT
;get the command line from memory
;get the opeode byte
;mask the INT and CONT bits
;put return addr. in D
;and put in on the stack
iHL gets addr. of command table
ishift the opcode for pointer
;check for reserved op-code
; skip next if OK
;otherwise, do a nop command
;L gets low byte
;and go there
;we~re done
;Genera1 Purpose Subroutines Follow:
;This subroutine puts: CURRENT+2 into D~~I, CURRENT+l
;into DMALO, CURRENT into L reg and WINDOW into H
23

Lexicon MPX-1 Specifications

General

Brand	Lexicon
Model	MPX-1
Category	Recording Equipment
Language	English