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Length: 7808 (0x1e80)
Types: TextFile
Names: »CALL.ASM«
└─⟦1b6e6286b⟧ Bits:30003265 CIS COBOL version 4.4 til CP/M-80 (BG/0000/BL)
└─⟦this⟧ »CALL.ASM«
└─⟦5487c9624⟧ Bits:30003266 CIS COBOL version 4.4 til CP/M-80 (BG/0026/BF)
└─⟦this⟧ »CALL.ASM«
└─⟦e265ead8b⟧ Bits:30005730 Add serial numbers to several RC700 & RC850 software packages
└─⟦this⟧ »CALL.ASM«
└─⟦f4cd6c984⟧ Bits:30005601 CIS COBOL v. 4.5 Rev 5 (RC702)
└─⟦this⟧ »CALL.ASM«
;*****************************************************************************
;*
;*
;* THIS IS AN EXAMPLE OF USER CALL CODE SUPPLIED PURELY FOR GUIDANCE OF THE
;* USER TO ENABLE THE MECHANICS OF CALL CODE INSERTION TO BE BETTER UNDERSTOOD.
;*
;* THE CODE IS DESIGNED TO BE A USEFUL EXAMPLE OF CALL, AND IF IMPLEMENTED
;* WILL ALLOW THE COBOL PROGRAMMER TO CREATE 16 BIT BINARY QUANTITIES FROM
;* UP TO 5 ASCII DIGITS, AND VICE VERSA. THE USE IS EXPLAINED IN MORE DETAIL
;* AT THE HEAD OF EACH ROUTINE.
;*
;* INTEL CORPORATION HAS TAKEN EVERY PRECAUTION TO ENSURE THE ACCURACY OF THESE
;* ROUTINES, BUT CANNOT BE HELD LIABLE IN ANY WAY FOR ANY ERRORS OR
;* OMISSIONS IN THEM.
;*
;*****************************************************************************
;*
;* THE MODULE MUST BE LOCATED AT THE ADDRESS SPECIFIED BY CONFIGURATOR
;* WHEN THE RTS IN WHICH THE CODE IS TO RESIDE WAS CONFIGURED. (SEE OPERATING
;* GUIDE, CHAPTER 4).
;*
BASE EQU 04404H ;REPLACE 04404H BY THE ADDRESS GIVEN
;BY CONFIGURATOR.
;*
;*
ORG BASE ;SET THE BASE ADDRESS
;*
;*****************************************************************************
;*
;* NOW FOLLOWS THE CALL CODE IDENTIFICATION TABLE. THIS IS A TABLE OF
;* ADDRESSES OF THE ENTRY-POINTS TO THE ROUTINES, PRECEDED BY A BINARY
;* 8 BIT ITEM SPECIFYING THE HIGHEST AVAILABLE ROUTINE NUMBER
;*
;*****************************************************************************
;*
CALTOP: DB MAXNO ;HIGHEST AVAILABLE CALL ROUTINE.
DW 0 ;CALL "00" (DOES NOT EXIST)
DW DECBIN ;CALL "01" - DECIMAL ASCII TO BINARY
DW BINDEC ;CALL "02" - BINARY TO DECIMAL ASCII
MAXNO EQU ($-CALTOP-3)/2 ;LET THE ASSEMBLER DO THE WORK.
;*
;*****************************************************************************
;*
;* NB. ALTHOUGH THE USE OF CALL "00" IN THE ABOVE EXAMPLE WOULD CAUSE
;* THE RTS TO ISSUE THE FOLLOWING ERROR:-
;* 164 - CALL CODE DOES NOT EXIST
;* THE USER IS AT LIBERTY TO PROVIDE HIS OWN CODE, BY PLUGGING IN
;* THE APPROPRIATE ROUTINE ADDRESS.
;*
;* SIMILARLY, OTHER ROUTINES MAY BE ADDED BY INCREASING THE NUMBER
;* OF ADDRESSES SPECIFIED. IF THESE ARE ADDED BEFORE THE MAXNO EQUATE,
;* THEN THE BYTE AT CALTOP WILL ALWAYS BE CORRECT
;*
;*
;*
;*
;
;
;
;
;
;
;
;*****************************************************************************
;*
;*ROUTINE: DECBIN
;*
;*CALLING SEQUENCE:
;* CALL "01" USING PARA1 PARA2 PARA3.
;*
;*FUNCTION: THIS ROUTINE CONVERTS A STRING OF DECIMAL (ASCII)
;* DIGITS INTO A 16 BIT BINARY QUANTITY. IT IS VERY LOW LEVEL
;* IN THAT IT EXPECTS A POSITIVE DECIMAL VALUE
;*
;*PARAMETERS: PARA1 - ADDRESS OF LENGTH OF DECIMAL STRING
;* HELD AS 1 BYTE ASCII DIGIT (NOT CHECKED)
;* THIS ADDRESS WILL BE NO. 2 ON STACK
;*
;* PARA2 - ADDRESS OF DECIMAL STRING
;* THIS ADDRESS WILL BE IN B,C ON ENTRY
;*
;* PARA3 - ADDRESS OF RESULT AREA.
;* SPECIFIES A 2 BYTE AREA
;* THIS ADDRESS WILL BE IN D,E ON ENTRY
;*
;*VALUES RETURNED: 16 BIT RESULT IN PARA3
;*
;*
;*****************************************************************************
;*
DECBIN:
POP H ;GET RETURN ADDRESS OFF STACK
XTHL ;GET ADDRESS OF PARA1
;PUTTING RETURN ADDRESS BACK.
;*
MOV A,M ;PUT IT IN ACCUMULATOR
ANI 0FH ;CONVERT TO BINARY
PUSH D ;SAVE ADDRESS OF RESULT
PUSH B ;MOVE STRING REF
POP D ; INTO D,E
LXI H,0 ;HL = BINARY ACCUMULATOR
DEC10:
PUSH PSW ;SAVE THE COUNT
DAD H ;BINARY ACCUMULATOR *2
MOV B,H ; AND MOVE IT INTO B,C
MOV C,L ;
DAD H ;BINARY ACCUMULATOR *4
DAD H ; *8
DAD B ; *8 + *2 = *10
; (IE. 8X + 2X = 10X)
;------------------------
LDAX D ;GET THE DECIMAL CHAR
INX D
ANI 0FH ;CONVERT TO BINARY CHAR
MVI B,0H
MOV C,A
DAD B ;ACC + CHAR
POP PSW
DCR A ;KEEP COUNT
JNZ DEC10
;*
;* NOW STORE RESULT IN USER'S AREA.
;*
XCHG ;PUT RESULT IN D,E
POP H ;GET ADDRESS OF RESULT AREA
MOV M,D ;STORE MS BYTE
INX H
MOV M,E ;STORE LS BYTE
RET
;
;*****************************************************************************
;*
;*ROUTINE: BINDEC
;*
;*CALLING SEQUENCE:
;* CALL "02" USING PARA1 PARA2.
;*
;*FUNCTION: TAKES THE BINARY QUANTITY ADDRESSED BY PARA1 AND CONVERTS
;* IT INTO A 5 DIGIT DECIMAL (ASCII) NO. THE RESULT IS PLACED
;* IN THE AREA SPECIFIED BY PARA2.
;*
;*PARAMETERS: PARA1 = ADDRESS OF 16 BIT (2 BYTE) QUANTITY.
;* WILL BE IN REG B,C ON ENTRY
;*
;* PARA2 = ADDRESS OF 5 BYTE RESULT AREA.
;* WILL BE IN REG D,E ON ENTRY
;*
;*VALUES RETURNED:
;* 5 DIGIT ASCII VALUE IN PARA2.
;*
;*****************************************************************************
BINDEC:
PUSH B ;GET VALUE ADDR
POP H ; IN H,L
MOV B,M ;VALUE
INX H ; IN
MOV C,M ; B,C
LXI H,0 ;PUSH CONSTANTS
PUSH H ; ON TO
LXI H,-10 ; STACK
PUSH H ; FOR USE
LXI H,-100 ; DURING
;*
PUSH H ; BINARY TO DECIMAL CONVERSION.
LXI H,-1000
PUSH H
LXI H,-10000
PUSH H
;* ;D,E = ADDRESS OF RESULT FIELD
CN25:
MVI A,30H ;SET TALLY TO ASCII ZERO
CN30:
POP H ;GET THE CONSTANT
PUSH H ;RESTORE IT
DAD B ;SUBTRACT FROM SOURCE OP
JNC CN40 ;ITS GONE NEGATIVE
INR A ;INC TALLY
PUSH H ;REPLACE B,C WITH
POP B ; NEW RESULT
JMP CN30
CN40:
POP H ;CLEAR CONSTANT OFF STACK
STAX D ;STORE TALLY IN RESULT FIELD
INX D ;INC RESULT ADDR POINTER
POP H ;ANY MORE CONSTANTS ?
MOV A,L
ORA H
JZ CN50 ;NO - FINISH OFF
PUSH H ;YES - RESTORE IT
JMP CN25
CN50:
MOV A,C ;INSERT UNITS
ADI 30H ;CONVERT TO ASCII
STAX D
RET ;RETURN
;*
;*
;*
END
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