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cobol-source/ascebc.mac
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TITLE ASCEBC ASCII TO EBCDIC CONVERSION TABLE.
SUBTTL /ACK
SEARCH COPYRT
SALL
;THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY ONLY BE USED
; OR COPIED IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE.
COPYRIGHT (C) 1975, 1983, 1984 BY DIGITAL EQUIPMENT CORPORATION
SEARCH P
%%P==:%%P
DEBUG==:DEBUG
SEARCH CHREQV ;DEFINE THE CHARACTER EQUIVALENCES.
;EDITS:
;V10********************
;NAME DATE COMMENTS
;ACK 13-MAR-75 CREATION.
;***********************
HISEG
.COPYRIGHT ;Put standard copyright statement in REL file
SALL
.XCREF
ENTRY ASEBC.
COMMENT \
THIS MODULE CONTAINS THE CONVERSION TABLE FOR CONVERTING ASCII
CHARACTERS TO EBCDIC.
THE TABLE IS STRUCTURED AS FOLLOWS:
WORD ASEBC.+N CONTAINS:
IN BITS THE EBCDIC CHARACTER EQUIVALENT TO THE
ASCII CHARACTER WHOSE VALUE IS
0-8 N*4
9-17 N*4+1
18-26 N*4+2
27-35 N*4+3
GIVEN AN ASCII CHARACTER IN TAC1 THE FOLLOWING CODE COULD BE
USED TO CONVERT IT TO EBCDIC:
IDIVI TAC1, 4
LDB TAC1, PTRS(TAC1+1)
.
.
.
PTRS: POINT 9,ASEBC.##(TAC1),8
POINT 9,ASEBC.##(TAC1),17
POINT 9,ASEBC.##(TAC1),26
POINT 9,ASEBC.##(TAC1),35
\
;MACROS USED TO GENERATE THE TABLE.
DEFINE X0 (I)<
I0==I
I1==I+1
I2==I+2
I3==I+3
X1 \I0,\I1,\I2,\I3
> ;END OF DEFINITION OF X0.
DEFINE X1 (I0,I1,I2,I3)<BYTE (9)AE%'I0,AE%'I1,AE%'I2,AE%'I3>
DEFINE TBLGEN<
IFE DEBUG,<XLIST> ;;DON'T LIST THE TABLE UNLESS WE
;; ARE DEBUGGING IT.
I==0
REPEAT 40,<
X0 I
I==I+4
> ;END OF REPEAT 40.
LIST
> ;END OF DEFINITION OF TBLGEN.
;GENERATE THE TABLE.
.CREF
ASEBC.: BLOCK 0
.XCREF
TBLGEN
END