/* Copyright 1998 (c) by Salvador Eduardo Tropea
   This code is part of the FreeBE/AF project you can use it under the
terms and conditions of the FreeBE/AF project. */

/*
 List of ports used:
 0x3C0,0x3C1,0x3C2,0x3C3,0x3C4,0x3C5,0x3C6,0x3C7,0x3C8,0x3C9,0x3CC,0x3CE,
 0x3CF,0x3D4,0x3D5,0x3DA
 TGUI:
 0x3D8,0x3D9,0x3DB,0x43C6,0x43C7,0x43C8,0x43C9,0x83C6,0x83C8
 0x2100-0x21FF
*/
/*  CRT (Cathode Rays Tube) Controller Registers
    They control the sync signals.
    0x00 to 0x18 */
// SVGALib and XFree86 uses <0x18 so they miss the line compare register,
// don't know why.
#define CRTbase 0
#define CRTcant 25
/*  ATT Attribute Controller Registers
    They control some attributes like 16 colors palette, overscan color, etc.
    0x00 to 0x14 */
#define ATTbase (CRTbase + CRTcant)
#define ATTcant 21
/*  GRA Graphics Controller Registers
    They control the read/write mode to the video memory.
    0x00 to 0x08 */
#define GRAbase (ATTbase + ATTcant)
#define GRAcant 9
/*  SEQ Sequence Registers
    They control how the memory is scanned.
    0x00 to 0x04 */
#define SEQbase (GRAbase + GRAcant)
#define SEQcant 5
/*  MOR Miscellaneous Output Register
    1 register */
#define MORbase (SEQbase + SEQcant)
#define MORcant 1

#define VGARegsCant (MORbase + MORcant)

/*  Status values: Here I store special status values that doesn't
    correspond to a physical register but to an operation plus some
    special registers */
#define SPbase 0
#define SPcant 12
#define OldNewStatus SPbase + 0
#define ALT_BNK_WRITE SPbase + 1
#define ALT_BNK_READ SPbase + 2
#define ALT_CLK SPbase + 3
#define DAC_3C6 SPbase + 4
#define DAC_3C6_4th SPbase + 5
#define DAC_WR_ADD SPbase + 6
#define MCLKLOW SPbase + 7
#define MCLKHIG SPbase + 8
#define VCLKLOW SPbase + 9
#define VCLKHIG SPbase + 10
#define DAC_INDEX SPbase + 11
/*  ESEQ Extra Sequence Registers
    0x08 to 0x0F (They have some tricks) */
#define ESEQbase (SPbase + SPcant)
#define ESEQcant 5
#define ESEQ_0D_old ESEQbase + 0
#define ESEQ_0E_old ESEQbase + 1
#define ESEQ_0D_new ESEQbase + 2
#define ESEQ_0E_new ESEQbase + 3
#define ESEQ_0F ESEQbase + 4
/*  ECRT Extra CRT Registers
    0x19 to 0x50 */
#define ECRTbase (ESEQbase + ESEQcant)
#define ECRTcant 33
#define ECRT_19 ECRTbase
#define ECRT_1E ECRTbase + 1
#define ECRT_1F ECRTbase + 2
#define ECRT_20 ECRTbase + 3
#define ECRT_21 ECRTbase + 4
#define ECRT_22 ECRTbase + 5
#define ECRT_23 ECRTbase + 6
#define ECRT_24 ECRTbase + 7
#define ECRT_25 ECRTbase + 8
#define ECRT_26 ECRTbase + 9
#define ECRT_27 ECRTbase + 10
#define ECRT_28 ECRTbase + 11
#define ECRT_29 ECRTbase + 12
#define ECRT_2A ECRTbase + 13
#define ECRT_2C ECRTbase + 14
#define ECRT_2F ECRTbase + 15
#define ECRT_30 ECRTbase + 16
#define ECRT_33 ECRTbase + 17
#define ECRT_34 ECRTbase + 18
#define ECRT_35 ECRTbase + 19
#define ECRT_36 ECRTbase + 20
#define ECRT_37 ECRTbase + 21
#define ECRT_38 ECRTbase + 22
#define ECRT_39 ECRTbase + 23
#define ECRT_40 ECRTbase + 24
#define ECRT_41 ECRTbase + 25
#define ECRT_42 ECRTbase + 26
#define ECRT_43 ECRTbase + 27
#define ECRT_44 ECRTbase + 28
#define ECRT_45 ECRTbase + 29
#define ECRT_46 ECRTbase + 30
#define ECRT_47 ECRTbase + 31
#define ECRT_50 ECRTbase + 32
/*  EGRA Extra Graphics Controller Registers
    0x0E, 0x0F, 0x23 and 0x2F */
#define EGRAbase (ECRTbase + ECRTcant)
#define EGRAcant 4
#define EGRA_0E_old EGRAbase
#define EGRA_0F EGRAbase + 1
#define EGRA_23 EGRAbase + 2
#define EGRA_2F EGRAbase + 3
/* EDAC Extra DAC/Clk */
#define EDACbase (EGRAbase + EGRAcant)
#define EDACcant 4
#define EDAC_00 EDACbase + 0
#define EDAC_01 EDACbase + 1
#define EDAC_02 EDACbase + 2
#define EDAC_03 EDACbase + 3
/* GER Graphics Engine Register. Only the relevant stuff */
/* 0x22 and 0x23 */
#define GERbase (EDACbase + EDACcant)
#define GERcant 6
#define GER_22 GERbase + 0
#define GER_23 GERbase + 1
#define GER_44 GERbase + 2
#define GER_45 GERbase + 3
#define GER_46 GERbase + 4
#define GER_47 GERbase + 5

#define SVGARegsCant (GERbase + GERcant)

#ifdef __cplusplus
extern "C" {
#endif
int VGASaveRegs(uchar *regs, uchar *Sregs);
void VGALoadRegs(const uchar *regs, const uchar *Sregs);
void TGUI9440SaveRegs(uchar *regs);
void TGUI9440LoadRegs(const uchar *regs);
#ifdef __cplusplus
}
#endif