150 lines
3.4 KiB
C
150 lines
3.4 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 EGA, Chips & Technologies SuperEGA, and
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* AX JEGA graphics cards.
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*
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* Version: @(#)vid_ega.h 1.0.7 2018/03/18
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*
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* Authors: Sarah Walker, <http://pcem-emulator.co.uk/>
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* Miran Grca, <mgrca8@gmail.com>
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* akm,
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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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* Copyright 2017,2018 akm.
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*/
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#ifndef VIDEO_EGA_H
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# define VIDEO_EGA_H
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#ifdef JEGA
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# define SBCS 0
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# define DBCS 1
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# define ID_LEN 6
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# define NAME_LEN 8
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# define SBCS19_LEN 256 * 19
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# define DBCS16_LEN 65536 * 32
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#endif
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#if defined(EMU_MEM_H) && defined(EMU_ROM_H)
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typedef struct ega_t {
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mem_mapping_t mapping;
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rom_t bios_rom;
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uint8_t crtcreg;
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uint8_t crtc[32];
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uint8_t gdcreg[16];
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int gdcaddr;
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uint8_t attrregs[32];
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int attraddr, attrff;
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int attr_palette_enable;
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uint8_t seqregs[64];
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int seqaddr;
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uint8_t miscout;
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int vidclock;
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uint8_t la, lb, lc, ld;
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uint8_t stat;
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int fast;
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uint8_t colourcompare, colournocare;
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int readmode, writemode, readplane;
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int chain4, chain2_read, chain2_write;
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int oddeven_page, oddeven_chain;
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int extvram;
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uint8_t writemask;
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uint32_t charseta, charsetb;
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uint8_t egapal[16];
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uint32_t *pallook;
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int vtotal, dispend, vsyncstart, split, vblankstart;
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int hdisp, htotal, hdisp_time, rowoffset;
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int lowres, interlace;
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int linedbl, rowcount;
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double clock;
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uint32_t ma_latch;
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int vres;
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int64_t dispontime, dispofftime;
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int64_t vidtime;
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uint8_t scrblank;
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int dispon;
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int hdisp_on;
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uint32_t ma, maback, ca;
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int vc;
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int sc;
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int linepos, vslines, linecountff, oddeven;
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int con, cursoron, blink;
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int scrollcache;
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int firstline, lastline;
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int firstline_draw, lastline_draw;
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int displine;
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uint8_t *vram;
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int vrammask;
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uint32_t vram_limit;
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int video_res_x, video_res_y, video_bpp;
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#ifdef JEGA
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uint8_t RMOD1, RMOD2, RDAGS, RDFFB, RDFSB, RDFAP, RPESL, RPULP, RPSSC, RPSSU, RPSSL;
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uint8_t RPPAJ;
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uint8_t RCMOD, RCCLH, RCCLL, RCCSL, RCCEL, RCSKW, ROMSL, RSTAT;
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int is_jega, font_index;
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int chr_left, chr_wide;
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#endif
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} ega_t;
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#endif
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#ifdef EMU_DEVICE_H
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extern const device_t ega_device;
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extern const device_t cpqega_device;
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extern const device_t sega_device;
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#endif
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#ifdef JEGA
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extern uint8_t jfont_sbcs_19[SBCS19_LEN]; /* 256 * 19( * 8) */
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extern uint8_t jfont_dbcs_16[DBCS16_LEN]; /* 65536 * 16 * 2 (* 8) */
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#endif
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extern int update_overscan;
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#define DISPLAY_RGB 0
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#define DISPLAY_COMPOSITE 1
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#define DISPLAY_RGB_NO_BROWN 2
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#define DISPLAY_GREEN 3
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#define DISPLAY_AMBER 4
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#define DISPLAY_WHITE 5
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#if defined(EMU_MEM_H) && defined(EMU_ROM_H)
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extern void ega_init(ega_t *ega, int monitor_type, int is_mono);
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extern void ega_recalctimings(struct ega_t *ega);
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#endif
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extern void ega_out(uint16_t addr, uint8_t val, void *p);
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extern uint8_t ega_in(uint16_t addr, void *p);
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extern void ega_poll(void *p);
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extern void ega_write(uint32_t addr, uint8_t val, void *p);
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extern uint8_t ega_read(uint32_t addr, void *p);
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#endif /*VIDEO_EGA_H*/
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