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EPSNFX80.ASM
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Assembly Source File
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1990-05-06
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5KB
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267 lines
COMMENT %
GRAPHIC WORKSHOP DOT MATRIX PRINTER DRIVER
COPYRIGHT (C) 1990 ALCHEMY MINDWORKS INC.
VERSION 1.0
%
PAGEWIDE EQU 612 ;PAGE WIDTH IN PIXELS
PAGEDEEP EQU 756 ;PAGE DEPTH IN PIXELS
LINEDEEP EQU 8 ;NUMBER OF BITS (PINS) IN A LINE
COLOURS EQU 1 ;ONLY ONE COLOUR SUPPORTED AS YET
VERSION EQU 1 ;VERSION NUMBER
SUBVERSION EQU 0 ;SUBVERSION NUMBER
_AOFF EQU 6 ;STACK OFFSET
CODE SEGMENT PARA PUBLIC 'CODE'
ASSUME CS:CODE
ORG 0000H ;ORIGIN FOR LOADABLE DRIVER
DB 'ALCHPRDR' ;SIGNATURE - DON'T CHANGE THIS
;THE FOLLOWING ARE THE POINTERS TO THE CALLABLE ROUTINES AND THE COMMON
;DATA. THE SEGMENTS ARE FILLED IN BY GRAPHIC WORKSHOP. DON'T CHANGE ANYTHING.
DISPATCH PROC FAR
DW INIT_PRINTER ;FAR POINTER TO PRINTER INITIALIZATION
DW ?
DW PRINT_LINE ;FAR POINTER TO LINE PRINT
DW ?
DW DEINIT_PRINTER ;FAR POINTER TO PRINTER DEINIT
DW ?
DW PRINT_TEXT ;FAR POINTER TO TEXT PRINT
DW ?
DW 0,0 ;NULL ONE
DW 0,0 ;NULL TWO
DW 0,0 ;NULL THREE
DW 0,0 ;NULL FOUR
V_PAGEWIDE DW PAGEWIDE
V_PAGEDEEP DW PAGEDEEP
V_LINEDEEP DW LINEDEEP
V_COLOURS DW COLOURS
;THESE VERSION NUMBERS REFLECT THE DRIVER TEMPLATE VERSION AND THE
;VERSION OF THE DRIVER ITSELF. YOU CAN CHANGE THE SUBVERSION VALUE
;TO REFLECT CHANGES IN YOUR DRIVER. THE VERSION VALUE MUST REMAIN
;UNCHANGED OR GRAPHIC WORKSHOP MAY REJECT YOUR DRIVER.
DW VERSION
DW SUBVERSION
;THIS SHOULD BE THE PRINTER NAME AS IT WILL APPEAR IN THE GWS MENU.
;THE FIRST BYTE MUST BE 01H AND THE NAME MUST BE EXACTLY 19 BYTES LONG
;PLUS ONE ZERO BYTE AT THE END.
DB 01H,'Epson FX-80 ',0
DISPATCH ENDP
;THIS PROCEDURE SHOULD INITIALIZE THE PRINTER. IT SHOULD ALSO STORE THE
;FIRST THREE INTS ON THE STACK FOR FUTURE USE. THESE ARE IMAGE_WIDTH,
;IMAGE_DEPTH AND IMAGE_BYTES RESPECTIVELY. ALSO ON THE STACK ARE A POINTER
;TO THE GWS CONFIGURATION STRUCT AND A POINTER TO THE CURRENT FILE NAME
INIT_PRINTER PROC NEAR
PUSH BP
MOV BP,SP
MOV AX,[BP + _AOFF + 0]
MOV CS:[IMAGE_WIDTH],AX
MOV AX,[BP + _AOFF + 2]
MOV CS:[IMAGE_DEPTH],AX
MOV AX,[BP + _AOFF + 4]
MOV CS:[IMAGE_BYTES],AX
MOV DX,OFFSET INIT_SEQ
CALL PRINT_STRING
POP BP
RETF
INIT_PRINTER ENDP
;THIS PROCEDURE SHOULD PRINT ONE LINE. A POINTER TO THE LINE IS
;ON THE STACK.
PRINT_LINE PROC NEAR
PUSH BP
MOV BP,SP
PUSH DS
MOV CX,CS:[IMAGE_WIDTH]
CMP CX,0
JE PRINT_L3
CMP CX,CS:[V_PAGEWIDE]
JL PRINT_L1
MOV CX,CS:[V_PAGEWIDE]
PRINT_L1: MOV CS:[START_LO],CL
MOV CS:[START_HI],CH
MOV DX,OFFSET START_SEQ
CALL PRINT_STRING
MOV SI,[BP + _AOFF + 0]
MOV DS,[BP + _AOFF + 2]
MOV DX,0
PRINT_L2: PUSH CX
CALL GET_BYTE
CALL PRINT_BYTE
INC DX
POP CX
LOOP PRINT_L2
MOV DX,OFFSET END_SEQ
CALL PRINT_STRING
PRINT_L3: POP DS
POP BP
RETF
PRINT_LINE ENDP
;THIS SHOULD DO ANYTHING NECESSARY TO FINISH THE PICTURE. IT SHOULD NOT
;ISSUE A FORM FEED, THOUGH.
DEINIT_PRINTER PROC NEAR
PUSH BP
MOV BP,SP
PUSH DS
MOV DX,OFFSET DEINIT_SEQ
CALL PRINT_STRING
POP DS
POP BP
RETF
DEINIT_PRINTER ENDP
;THIS WILL PRINT A LINE OF TEXT TO THE PRINTER. THE STRING IS ON THE
;STACK FOLLOWED BY THE LENGTH OF THE STRING
PRINT_TEXT PROC NEAR
PUSH BP
MOV BP,SP
PUSH DS
MOV SI,[BP + _AOFF + 0]
MOV DS,[BP + _AOFF + 2]
MOV CX,[BP + _AOFF + 4]
CMP CX,0
JE PRINT_T2
CLD
PRINT_T1: LODSB
CALL PRINT_BYTE
LOOP PRINT_T1
PRINT_T2: POP DS
POP BP
RETF
PRINT_TEXT ENDP
;GET ONE BYTE FROM THE LINE FIELD
GET_BYTE PROC NEAR
PUSH BX
PUSH CX
PUSH DX
PUSH SI
MOV BX,DX
SHR BX,1
SHR BX,1
SHR BX,1
MOV AH,80H
MOV CL,DL
AND CL,0007H
SHR AH,CL
MOV AL,0
MOV CX,CS:[V_LINEDEEP]
MOV DH,80H
GETBYTE1: TEST DS:[SI + BX],AH
JNZ GETBYTE2
OR AL,DH
GETBYTE2: ADD SI,CS:[IMAGE_BYTES]
SHR DH,1
LOOP GETBYTE1
POP SI
POP DX
POP CX
POP BX
RET
GET_BYTE ENDP
;PRINT A PASCAL STYLE STRING IN CS:DX
PRINT_STRING PROC NEAR
PUSH CX
PUSH BX
MOV BX,DX
MOV CX,0
MOV CL,CS:[BX]
PRINT_S1: INC BX
MOV AL,CS:[BX]
CALL PRINT_BYTE
LOOP PRINT_S1
POP BX
POP CX
RET
PRINT_STRING ENDP
;PRINT ONE BYTE IN AL
PRINT_BYTE PROC NEAR
PUSH AX
PUSH BX
PUSH CX
PUSH DX
PUSH SI
PUSH DS
PUSH AX
PRINT_B1: MOV AH,2
MOV DX,0
INT 17H
TEST AH,80H
JZ PRINT_B1
POP AX
MOV AH,0
MOV DX,0
INT 17H
POP DS
POP SI
POP DX
POP CX
POP BX
POP AX
RET
PRINT_BYTE ENDP
IMAGE_WIDTH DW 0
IMAGE_DEPTH DW 0
IMAGE_BYTES DW 0
;
; NOTE - ALL STRINGS START WITH A LENGTH BYTE
;
;THIS IS THE STRING SENT TO THE PRINTER AT THE START OF A GRAPHIC LINE
START_SEQ DB 5,1BH,'*',06H
START_LO DB 0
START_HI DB 0
;THIS IS THE STRING SENT TO THE PRINTER AT THE END OF A GRAPHIC LINE
END_SEQ DB 4,0DH,1BH,'J',18H
;THIS IS THE STRING SENT TO THE PRINTER TO INITIALIZE THE BEAST
INIT_SEQ DB 2,1BH,'@'
;THIS IS THE STRING SENT TO THE PRINTER TO DIINITIALIZE THE BEAST
DEINIT_SEQ DB 4,0DH,0AH,1BH,'@'
CODE ENDS
END