21bb3f6923
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@26 6ac86273-5f31-0410-b378-82cca8765d1b
209 lines
5.6 KiB
NASM
209 lines
5.6 KiB
NASM
;
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; File:
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; printer.asm
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; Description:
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; Printer device driver
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;
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; Copyright (c) 1998
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; Pasquale J. Villani
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; All Rights Reserved
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;
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; This file is part of DOS-C.
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;
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; DOS-C is free software; you can redistribute it and/or
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; modify it under the terms of the GNU General Public License
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; as published by the Free Software Foundation; either version
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; 2, or (at your option) any later version.
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;
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; DOS-C is distributed in the hope that it will be useful, but
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; WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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; the GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public
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; License along with DOS-C; see the file COPYING. If not,
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; write to the Free Software Foundation, 675 Mass Ave,
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; Cambridge, MA 02139, USA.
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;
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; $Header$
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;
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; $Log$
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; Revision 1.3 2000/05/25 20:56:21 jimtabor
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; Fixed project history
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;
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; Revision 1.2 2000/05/08 04:30:00 jimtabor
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; Update CVS to 2020
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;
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; Revision 1.1.1.1 2000/05/06 19:34:53 jhall1
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; The FreeDOS Kernel. A DOS kernel that aims to be 100% compatible with
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; MS-DOS. Distributed under the GNU GPL.
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;
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; Revision 1.2 1999/08/10 17:57:13 jprice
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; ror4 2011-02 patch
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;
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; Revision 1.1.1.1 1999/03/29 15:41:26 jprice
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; New version without IPL.SYS
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;
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; Revision 1.1 1999/02/08 05:55:57 jprice
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; Added Pat's 1937 kernel patches
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;
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; $EndLog$
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;
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%include "io.inc"
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segment _IO_FIXED_DATA
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global LptTable
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LptTable db 18h
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dw _IOExit
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dw _IOExit
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dw _IOExit
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dw _IOCommandError
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dw _IOSuccess
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dw _IODone
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dw _IOExit
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dw _IOExit
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dw PrtWrite
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dw PrtWrite
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dw PrtOutStat
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dw _IOExit
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dw _IOExit
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dw _IOExit
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dw _IOExit
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dw _IOExit
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dw PrtOutBsy
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dw _IOExit
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dw _IOExit
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dw PrtGenIoctl
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dw _IOExit
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dw _IOExit
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dw _IOExit
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dw _IOCommandError
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dw _IOCommandError
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segment _IO_TEXT
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global uPrtNo
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uPrtNo db 0
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uPrtQuantum dw 50h
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dw 50h, 50h
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db 50h, 00h
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PrtWrite:
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jcxz PrtWr3 ; Exit if nothing to write
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PrtWr1:
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mov bx,2
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PrtWr2:
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mov al,[es:di]
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inc di
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xor ah,ah ; Zero register
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call PrtIOCall ; (0800)
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jnz PrtWr4 ; Exit if done
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loop PrtWr1 ; otherwise loop
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PrtWr3:
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jmp _IOExit
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PrtWr4:
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dec di
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dec bx
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jnz PrtWr2
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PrtWr5:
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jmp _IOErrCnt
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PrtOutStat:
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call GetPrtStat
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jnz PrtWr5
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mov al,9
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test ah,20h
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jnz PrtWr5
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test ah,80h
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jnz PrtWr3
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jmp _IODone
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GetPrtStat:
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mov ah,2
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PrtIOCall:
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call GetUnitNum
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int 17h ; print char al, get status ah
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test ah,8
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jz PrtIOCal2
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mov al,9
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test ah,20h
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jnz PrtIOCal1
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inc al
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PrtIOCal1:
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retn
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PrtIOCal2:
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mov al,2
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test ah,1
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retn
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PrtOutBsy:
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push ds
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push es
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pop ds
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mov si,di
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PrtOtBsy1:
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push cx
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push bx
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xor bx,bx
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mov bl,[cs:uPrtNo]
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shl bx,1
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mov cx,[cs:uPrtQuantum+bx]
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pop bx
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PrtOtBsy2:
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call GetPrtStat
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jnz PrtOtBsy3
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test ah,80h
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loopz PrtOtBsy2
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pop cx
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jz PrtOtBsy4
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lodsb
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xor ah,ah
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call PrtIOCall
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jnz PrtOtBsy4
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loop PrtOtBsy1
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pop ds
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lds bx,[cs:_ReqPktPtr]
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sub [bx+12h],cx
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jmp _IOExit
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PrtOtBsy3:
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pop cx
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PrtOtBsy4:
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pop ds
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lds bx,[cs:_ReqPktPtr]
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sub [bx+12h],cx
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jmp _IOErrorExit
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PrtGenIoctl:
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les di,[cs:_ReqPktPtr]
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cmp byte [es:di+0Dh],5
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je PrtGnIoctl2
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PrtGnIoctl1:
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jmp _IOCommandError
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PrtGnIoctl2:
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mov al,[es:di+0Eh]
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les di,[es:di+13h]
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xor bx,bx
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mov bl,[cs:uPrtNo]
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shl bx,1
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mov cx,[cs:uPrtQuantum+bx]
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cmp al,65h
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je PrtGnIoctl3
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cmp al,45h
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jne PrtGnIoctl1
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mov cx,[es:di]
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PrtGnIoctl3:
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mov [cs:uPrtQuantum+bx],cx
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mov [es:di],cx
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jmp _IOExit
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