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The C Users' Group Library 1994 August
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wc-cdrom-cusersgrouplibrary-1994-08.iso
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vol_100
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113_01
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a15tbl1.csm
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1985-03-10
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TITLE 'Machine Language Functions for 1805A Cross-Assembler V 1.2'
PAGE 60
;
; 1805A Cross-Assembler Version 1.2
;
; Copyright (c) 1980, 82, 83, 85 William C. Colley, III.
;
; July 1982 -- Adapted from my 1802 cross-assembler. WCC3.
;
; Vers 1.0 -- March 1983 -- Added 1805A opcodes to the 1805 set. WCC3.
;
; Vers 1.1 -- March 1983 -- Added CPU pseudo-op to combine 1802 and 1805A
; cross-assemblers into a single program. WCC3.
;
; Vers 1.2 -- June 1985 -- Fixed IF block nesting mechanism bug and bug
; in 1805A SCAL opcode. WCC3.
;
; File: A15TBL1.CSM
;
; Machine Language Functions -- Module #1 of 2.
;
;
; Arguments are passed via offsets from the stack pointer.
; They are defined as follows:
;
ARG0 EQU 2 ;First argument.
ARG1 EQU 4 ;Second argument.
ARG2 EQU 6 ;Third argument.
ARG3 EQU 8 ;Fourth argument.
;
PAGE
;
; This function gets opcode number num from the opcode table. The function
; returns 0 if the opcode was not found, 1 if it was.
;
; Function is called as follows:
;
; getopc(num,opcode,value,attrib);
;
; num Character containing the number of the desired entry.
; 0 represents the first entry in the table. The
; table is in alphabetical order for the benefit
; of the binary searching routine (written in C).
; opcode Pointer to a 5-character array which will receive the
; opcode's name (null terminated).
; value Pointer to a character that will receive the opcode's
; value.
; attrib Pointer to a character that will receive the opcode's
; attibute byte.
;
NUM EQU ARG0
OPCODE EQU ARG1
VALUE EQU ARG2
ATTRIB EQU ARG3
;
FUNCTION GETOPC
;
LXI H, NUM ;Get entry number.
DAD SP
MOV A,M
CPI OPTBLL ;Entry in table?
LXI H, 0 ;If not, return 0.
RNC
;
MOV L,A ;Find entry by computing
DAD H ; (6 * num) + table base.
MOV E,L
MOV D,H
DAD H
DAD D
LXI D,OPCTBL
DAD D
MOV E,L
MOV D,H
;
LXI H, OPCODE ;Find opcode return area.
DAD SP
MOV A,M
INX H
MOV H,M
MOV L,A
;
PUSH B ;Move opcode out to return area.
MVI C, 4
MOVOPC: LDAX D
INX D
MOV M,A
INX H
DCR C
JNZ MOVOPC
POP B
;
MVI M, 0 ;Terminate opcode.
;
LXI H, ATTRIB ;Find attribute byte return area.
DAD SP
MOV A,M
INX H
MOV H,M
MOV L,A
;
LDAX D ;Move attribute byte to return area.
INX D
MOV M,A
;
LXI H, VALUE ;Find value byte return area.
DAD SP
MOV A,M
INX H
MOV H,M
MOV L,A
;
LDAX D ;Move value byte to return area.
MOV M,A
;
LXI H, 1 ;Return 1 for successful get.
RET
;
; The opcode table itself:
;
; Each entry has a four-byte name, a one-byte attribute,
; and a one-byte value. The value is the lowest
; numbered opcode having that name.
;
; The attribute byte bits are allocated as follows:
;
; 7 = Pseudo-op.
; 6 = If pseudo-op, if group (no label allowed).
; 6 = If opcode, 68 group (two-byte opcode).
; 3-5 = Processor number (0 if pseudo-op).
; 0-2 = Number of bytes (0 if pseudo-op).
;
OPTBLB EQU $
OPCTBL: DB 'ADC', 0, 01H, 74H
DB 'ADCI', 12H, 7CH
DB 'ADD', 0, 01H, 0F4H
DB 'ADI', 0, 12H, 0FCH
DB 'AND', 0, 01H, 0F2H
DB 'ANI', 0, 12H, 0FAH
DB 'B1', 0, 0, 1AH, 34H
DB 'B2', 0, 0, 1AH, 35H
DB 'B3', 0, 0, 1AH, 36H
DB 'B4', 0, 0, 1AH, 37H
DB 'BCI', 0, 5BH, 3EH
DB 'BDF', 0, 1AH, 33H
DB 'BGE', 0, 1AH, 33H
DB 'BL', 0, 0, 1AH, 3BH
DB 'BLK', 0, 80H, 05H
DB 'BM', 0, 0, 1AH, 3BH
DB 'BN1', 0, 1AH, 3CH
DB 'BN2', 0, 1AH, 3DH
DB 'BN3', 0, 1AH, 3EH
DB 'BN4', 0, 1AH, 3FH
DB 'BNF', 0, 1AH, 3BH
DB 'BNQ', 0, 1AH, 39H
DB 'BNZ', 0, 1AH, 3AH
DB 'BPZ', 0, 1AH, 33H
DB 'BQ', 0, 0, 1AH, 31H
DB 'BR', 0, 0, 1AH, 30H
DB 'BXI', 0, 5BH, 3FH
DB 'BYTE', 80H, 02H
DB 'BZ', 0, 0, 1AH, 32H
DB 'CID', 0, 42H, 0DH
DB 'CIE', 0, 42H, 0CH
DB 'CPU', 0, 80H, 0DH
DB 'DACI', 53H, 7CH
DB 'DADC', 42H, 74H
DB 'DADD', 42H, 0F4H
DB 'DADI', 53H, 0FCH
DB 'DBNZ', 7CH, 20H
DB 'DEC', 0, 09H, 20H
DB 'DIS', 0, 01H, 71H
DB 'DSAV', 42H, 76H
DB 'DSBI', 53H, 7FH
DB 'DSM', 0, 42H, 0F7H
DB 'DSMB', 42H, 77H
DB 'DSMI', 53H, 0FFH
DB 'DTC', 0, 42H, 01H
DB 'ELSE', 0C0H, 07H
DB 'END', 0, 80H, 06H
DB 'ENDI', 0C0H, 08H
DB 'EQU', 0, 80H, 01H
DB 'ETQ', 0, 42H, 09H
DB 'GEC', 0, 42H, 08H
DB 'GHI', 0, 09H, 90H
DB 'GLO', 0, 09H, 80H
DB 'IDL', 0, 01H, 00H
DB 'IF', 0, 0, 0C0H, 09H
DB 'INC', 0, 09H, 10H
DB 'INP', 0, 29H, 68H
DB 'IRX', 0, 01H, 60H
DB 'LBDF', 23H, 0C3H
DB 'LBNF', 23H, 0CBH
DB 'LBNQ', 23H, 0C9H
DB 'LBNZ', 23H, 0CAH
DB 'LBQ', 0, 23H, 0C1H
DB 'LBR', 0, 23H, 0C0H
DB 'LBZ', 0, 23H, 0C2H
DB 'LDA', 0, 09H, 40H
DB 'LDC', 0, 42H, 06H
DB 'LDI', 0, 12H, 0F8H
DB 'LDN', 0, 09H, 00H
DB 'LDX', 0, 01H, 0F0H
DB 'LDXA', 01H, 72H
DB 'LOAD', 80H, 0CH
DB 'LSDF', 01H, 0CFH
DB 'LSIE', 01H, 0CCH
DB 'LSKP', 01H, 0C8H
DB 'LSNF', 01H, 0C7H
DB 'LSNQ', 01H, 0C5H
DB 'LSNZ', 01H, 0C6H
DB 'LSQ', 0, 01H, 0CDH
DB 'LSZ', 0, 01H, 0CEH
DB 'MARK', 01H, 79H
DB 'NBR', 0, 1AH, 38H
DB 'NLBR', 23H, 0C8H
DB 'NOP', 0, 01H, 0C4H
DB 'OR', 0, 0, 01H, 0F1H
DB 'ORG', 0, 80H, 00H
DB 'ORI', 0, 12H, 0F9H
DB 'OUT', 0, 29H, 60H
DB 'PAGE', 80H, 0BH
DB 'PHI', 0, 09H, 0B0H
DB 'PLO', 0, 09H, 0A0H
DB 'REQ', 0, 01H, 7AH
DB 'RET', 0, 01H, 70H
DB 'RLDI', 74H, 0C0H
DB 'RLXA', 4AH, 60H
DB 'RNX', 0, 4AH, 0B0H
DB 'RSHL', 01H, 7EH
DB 'RSHR', 01H, 76H
DB 'RSXD', 4AH, 0A0H
DB 'SAV', 0, 01H, 78H
DB 'SCAL', 74H, 80H
DB 'SCM1', 42H, 05H
DB 'SCM2', 42H, 03H
DB 'SD', 0, 0, 01H, 0F5H
DB 'SDB', 0, 01H, 75H
DB 'SDBI', 12H, 7DH
DB 'SDI', 0, 12H, 0FDH
DB 'SEP', 0, 09H, 0D0H
DB 'SEQ', 0, 01H, 7BH
DB 'SET', 0, 80H, 0AH
DB 'SEX', 0, 09H, 0E0H
DB 'SHL', 0, 01H, 0FEH
DB 'SHLC', 01H, 7EH
DB 'SHR', 0, 01H, 0F6H
DB 'SHRC', 01H, 76H
DB 'SKP', 0, 01H, 38H
DB 'SM', 0, 0, 01H, 0F7H
DB 'SMB', 0, 01H, 77H
DB 'SMBI', 12H, 7FH
DB 'SMI', 0, 12H, 0FFH
DB 'SPM1', 42H, 04H
DB 'SPM2', 42H, 02H
DB 'SRET', 4AH, 90H
DB 'STM', 0, 42H, 07H
DB 'STPC', 42H, 00H
DB 'STR', 0, 09H, 50H
DB 'STXD', 01H, 73H
DB 'TEXT', 80H, 04H
DB 'WORD', 80H, 03H
DB 'XID', 0, 42H, 0BH
DB 'XIE', 0, 42H, 0AH
DB 'XOR', 0, 01H, 0F3H
DB 'XRI', 0, 12H, 0FBH
;
OPTBLL EQU ($ - OPTBLB) / 6 ;Calculate length of table.
;
ENDFUNCTION
;
PAGE
;
; This function returns the number of opcodes in the opcode table
; for the benefit of the binary searching routine (written in C).
;
; This function is called as follows:
;
; numopcs();
;
FUNCTION NUMOPCS
;
LXI H, OPTBLL ;Return number of opcodes.
RET
;
ENDFUNCTION
;
; End of package:
;
END
EP', 0,