claunia/86Box
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Do the same for the registers.

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This commit is contained in:
starfrost013
2025-06-09 15:25:28 +01:00
parent e637f53981
commit d13251c07a
2 changed files with 27 additions and 17 deletions
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19
src/include/86box/vid_cga.h
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@@ -29,7 +29,7 @@ typedef enum cga_mode_flags_e
CGA_MODE_FLAG_GRAPHICS = 1 << 1, // Graphics mode
CGA_MODE_FLAG_BW = 1 << 2, // Black and white
CGA_MODE_FLAG_VIDEO_ENABLE = 1 << 3, // 0 = no video (as if the video was 0)
CGA_MODE_FLAG_HIGHRES_GRAPHICS = 1 << 4, // 640*200 mode. Corrupts the
CGA_MODE_FLAG_HIGHRES_GRAPHICS = 1 << 4, // 640*200 mode. Corrupts text mode if CGA_MODE_FLAG_GRAPHICS not set.
CGA_MODE_FLAG_BLINK = 1 << 5, // If this is set, bit 5 of textmode characters blinks. Otherwise it is a high-intensity bg mode.
} cga_mode_flags;
@@ -51,11 +51,22 @@ typedef enum cga_crtc_registers_e
CGA_CRTC_START_ADDR_HIGH = 0xC, // Screen start address high 8 bits
CGA_CRTC_START_ADDR_LOW = 0xD, // Screen start address low 8 bits
CGA_CRTC_CURSOR_ADDR_HIGH = 0xE, // Cursor address high 8 bits
CGA_CRTC_CURSOR_ADDR_LOW = 0xF, // Cursor addres low 8 bits
CGA_CRTC_LIGHT_PEN_ADDR_HIGH = 0x10,
CGA_CRTC_LIGHT_PEN_ADDR_LOW = 0x11,
CGA_CRTC_CURSOR_ADDR_LOW = 0xF, // Cursor address low 8 bits
CGA_CRTC_LIGHT_PEN_ADDR_HIGH = 0x10, // Light pen address high 8 bits (not currently supported)
CGA_CRTC_LIGHT_PEN_ADDR_LOW = 0x11, // Light pen address low 8 bits (not currently supported)
} cga_crtc_registers;
typedef enum cga_registers_e
{
CGA_REGISTER_CRTC_INDEX = 0x3D4,
CGA_REGISTER_CRTC_DATA = 0x3D5,
CGA_REGISTER_MODE_CONTROL = 0x3D8,
CGA_REGISTER_COLOR_SELECT = 0x3D9,
CGA_REGISTER_STATUS = 0x3DA,
CGA_REGISTER_CLEAR_LIGHT_PEN_LATCH = 0x3DB,
CGA_REGISTER_SET_LIGHT_PEN_LATCH = 0x3DC,
} cga_registers;
typedef struct cga_t {
mem_mapping_t mapping;