77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/*
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GSport - an Apple //gs Emulator
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Copyright (C) 2010 by GSport contributors
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Based on the KEGS emulator written by and Copyright (C) 2003 Kent Dickey
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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parallel.c
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This file handles the Apple II Parallel Card emulation in slot 1. Its very
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basic, but allows for future support of redirecting the output to a real
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parallel port, files, and additional types of emulated printers.
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*/
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#include "defc.h"
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#include "printer.h"
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extern int g_parallel_out_masking;
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extern word32 g_vbl_count;
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extern int g_printer_timeout;
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word32 printer_vbl_count = 0;
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int port_block = 0;
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byte parallel_read(word16 io_address)
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{
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//printf("parallel card status called at %x\n", io_address);
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//since we only have a virtual printer, always return state as "Ready"
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return 0xff;
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}
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void parallel_write(word16 io_address, byte val)
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{
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//Mask MSB if user has it set.
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if(g_parallel_out_masking) {
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val = val & 0x7f;
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}
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//printf("parallel card called at %x\n", io_address);
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//send a byte to the virtual printer
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//By default all output to $C090 gets sent to the printer
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if (io_address == 0x00)
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{
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port_block = 1;
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printer_loop(val);
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printer_vbl_count = g_vbl_count+(g_printer_timeout*60);
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port_block = 0;
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}
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return;
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}
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//This function handles the automatic timeout of the virtual printer if an
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//application doesn't send a form feed at the end of the page. It also
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//allows multipage mode Postscript and native printer documents to
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//print somewhat how a regular application would.
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void printer_update()
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{
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if (port_block != 1 && printer_vbl_count != 0 && g_vbl_count >= printer_vbl_count)
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{
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printf("Calling printer_update and flushing!\n");
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printer_feed();
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printer_vbl_count = 0;
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}
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return;
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}
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