88 lines
1.9 KiB
C
88 lines
1.9 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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*
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*
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* Authors: Sarah Walker, <https://pcem-emulator.co.uk/>
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* Miran Grca, <mgrca8@gmail.com>
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*
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* Copyright 2008-2018 Sarah Walker.
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* Copyright 2016-2018 Miran Grca.
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*/
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#ifndef VIDEO_CGA_H
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#define VIDEO_CGA_H
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typedef struct cga_t {
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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;
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uint8_t cgacol;
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int fontbase;
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int linepos;
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int displine;
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int sc;
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int vc;
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int cgadispon;
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int con;
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int coff;
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int cursoron;
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int cgablink;
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int vsynctime;
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int vadj;
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uint16_t ma;
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uint16_t maback;
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int oddeven;
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uint64_t dispontime;
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uint64_t dispofftime;
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pc_timer_t timer;
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int firstline;
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int lastline;
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int drawcursor;
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int fullchange;
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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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int rgb_type;
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int double_type;
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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 *priv);
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uint8_t cga_in(uint16_t addr, void *priv);
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void cga_write(uint32_t addr, uint8_t val, void *priv);
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uint8_t cga_read(uint32_t addr, void *priv);
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void cga_recalctimings(cga_t *cga);
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void cga_poll(void *priv);
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#ifdef EMU_DEVICE_H
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extern const device_config_t cga_config[];
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extern const device_t cga_device;
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extern const device_t cga_pravetz_device;
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#endif
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#endif /*VIDEO_CGA_H*/
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