mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-27 12:28:06 +11:00
57fd14b0b3
In CURSOR!, I was using a write commande to read from VRAM and the emulator didn't properly behave and did as if everything was fine. The result on a real SMS was that the cursor would contain the inverted glyph of the contents of the *old* cursor position.
28 lines
653 B
C
28 lines
653 B
C
#pragma once
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
#define TMS_VRAM_SIZE 0x4000
|
|
// Offset of the name table
|
|
#define TMS_NTABLE_OFFSET 0x3800
|
|
|
|
|
|
typedef struct {
|
|
uint8_t vram[TMS_VRAM_SIZE];
|
|
uint8_t regs[0x10];
|
|
uint8_t cmdlsb;
|
|
bool has_cmdlsb;
|
|
uint16_t curaddr;
|
|
uint8_t databuf;
|
|
uint16_t width; // in pixels
|
|
uint16_t height; // in pixels
|
|
} TMS9918;
|
|
|
|
void tms_init(TMS9918 *tms);
|
|
uint8_t tms_cmd_rd(TMS9918 *tms);
|
|
void tms_cmd_wr(TMS9918 *tms, uint8_t val);
|
|
uint8_t tms_data_rd(TMS9918 *tms);
|
|
void tms_data_wr(TMS9918 *tms, uint8_t val);
|
|
// result is a RGB value
|
|
uint8_t tms_pixel(TMS9918 *tms, uint16_t x, uint16_t y);
|