84595f1c78
Unfinished JEGA emulation based on akm's DOSVAX (AX-emulating fork of DOSBox), not yet hooked into the reset of the emulator.
66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Emulation of the old and new IBM CGA graphics cards.
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*
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* Version: @(#)vid_cga.h 1.0.0 2017/05/30
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*
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* Author: Sarah Walker, <http://pcem-emulator.co.uk/>
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* Miran Grca, <mgrca8@gmail.com>
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* Copyright 2008-2017 Sarah Walker.
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* Copyright 2016-2017 Miran Grca.
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*/
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typedef struct cga_t
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{
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mem_mapping_t mapping;
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int crtcreg;
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uint8_t crtc[32];
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uint8_t cgastat;
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uint8_t cgamode, cgacol;
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int linepos, displine;
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int sc, vc;
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int cgadispon;
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int con, coff, cursoron, cgablink;
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int vsynctime, vadj;
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uint16_t ma, maback;
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int oddeven;
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int dispontime, dispofftime;
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int vidtime;
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int firstline, lastline;
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int drawcursor;
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uint8_t *vram;
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uint8_t charbuffer[256];
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int revision;
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int composite;
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int snow_enabled;
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#ifndef __unix
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int rgb_type;
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#endif
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} cga_t;
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void cga_init(cga_t *cga);
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void cga_out(uint16_t addr, uint8_t val, void *p);
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uint8_t cga_in(uint16_t addr, void *p);
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void cga_write(uint32_t addr, uint8_t val, void *p);
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uint8_t cga_read(uint32_t addr, void *p);
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void cga_recalctimings(cga_t *cga);
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void cga_poll(void *p);
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extern device_t cga_device;
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