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9216057db8
I implement the screen using XCB which is much more friendly than z80e's SDL+CMake for development machines that want to install minimal dependencies (for example, a port-less OpenBSD rig).
42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
#include <stdint.h>
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#include <stdbool.h>
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#define T6A04_ROWSIZE (120/8)
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#define T6A04_RAMSIZE 64*T6A04_ROWSIZE
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typedef enum {
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T6A04_XDEC = 0,
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T6A04_XINC = 1,
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T6A04_YDEC = 2,
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T6A04_YINC = 3
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} T6A04_INCMODE;
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typedef struct {
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// RAM is organized in 64 rows of 120 pixels (there is some offscreen
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// memory). Each byte holds 8 pixels. unset means no pixel, set means pixel.
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uint8_t ram[T6A04_RAMSIZE];
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bool enabled;
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// Whether the 8bit mode is enabled.
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bool has8bitmode;
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// Current "increment mode"
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T6A04_INCMODE incmode;
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// current Z offset
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uint8_t offset;
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// Currently active row
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uint8_t currow;
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// Currently active col (actual meaning depends on whether we're in 8bit
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// mode)
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uint8_t curcol;
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// True when a movement command was just made or if the LCD was just
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// initialized. When this is true, a read operation on the data port will be
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// invalid (returns zero and doesn't autoinc).
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bool just_moved;
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} T6A04;
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void t6a04_init(T6A04 *lcd);
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uint8_t t6a04_cmd_rd(T6A04 *lcd);
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void t6a04_cmd_wr(T6A04 *lcd, uint8_t val);
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uint8_t t6a04_data_rd(T6A04 *lcd);
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void t6a04_data_wr(T6A04 *lcd, uint8_t val);
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bool t6a04_pixel(T6A04 *lcd, uint8_t y, uint8_t x);
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