| 1 | #include <stdarg.h> |
| 2 | |
| 3 | #define u8 unsigned char |
| 4 | #define u16 unsigned short |
| 5 | #define u32 unsigned int |
| 6 | |
| 7 | #define noinline __attribute__((noinline)) |
| 8 | |
| 9 | #include "edos.h" |
| 10 | |
| 11 | #define GFX_DATA_PORT 0xC00000 |
| 12 | #define GFX_CTRL_PORT 0xC00004 |
| 13 | |
| 14 | #define TILE_MEM_END 0xB000 |
| 15 | |
| 16 | #define FONT_LEN 128 |
| 17 | #define TILE_FONT_BASE (TILE_MEM_END / 32 - FONT_LEN) |
| 18 | |
| 19 | /* note: using ED menu's layout here.. */ |
| 20 | #define WPLAN (TILE_MEM_END + 0x0000) |
| 21 | #define HSCRL (TILE_MEM_END + 0x0800) |
| 22 | #define SLIST (TILE_MEM_END + 0x0C00) |
| 23 | #define APLANE (TILE_MEM_END + 0x1000) |
| 24 | #define BPLANE (TILE_MEM_END + 0x3000) |
| 25 | |
| 26 | #define write16(a, d) \ |
| 27 | *((volatile u16 *) (a)) = (d) |
| 28 | #define write32(a, d) \ |
| 29 | *((volatile u32 *) (a)) = (d) |
| 30 | |
| 31 | #define GFX_WRITE_VRAM_ADDR(adr) \ |
| 32 | (((0x4000 | ((adr) & 0x3FFF)) << 16) | ((adr) >> 14) | 0x00) |
| 33 | #define GFX_WRITE_VSRAM_ADDR(adr) \ |
| 34 | (((0x4000 | ((adr) & 0x3FFF)) << 16) | ((adr) >> 14) | 0x10) |
| 35 | |
| 36 | enum { |
| 37 | VDP_MODE1 = 0x00, |
| 38 | VDP_MODE2 = 0x01, |
| 39 | VDP_BACKDROP = 0x07, |
| 40 | VDP_MODE3 = 0x0b, |
| 41 | VDP_MODE4 = 0x0c, |
| 42 | VDP_AUTOINC = 0x0f, |
| 43 | VDP_SCROLLSZ = 0x10, |
| 44 | }; |
| 45 | |
| 46 | /* cell counts */ |
| 47 | #define LEFT_BORDER 1 /* lame TV */ |
| 48 | #define PLANE_W 64 |
| 49 | #define PLANE_H 32 |
| 50 | #define CSCREEN_H 28 |
| 51 | |
| 52 | static noinline void VDP_drawTextML(const char *str, u16 plane_base, |
| 53 | u16 x, u16 y) |
| 54 | { |
| 55 | const u8 *src = (const u8 *)str; |
| 56 | u16 basetile = 0; |
| 57 | int max_len = 40 - LEFT_BORDER; |
| 58 | int len; |
| 59 | u32 addr; |
| 60 | |
| 61 | x += LEFT_BORDER; |
| 62 | |
| 63 | for (len = 0; str[len] && len < max_len; len++) |
| 64 | ; |
| 65 | if (len > (PLANE_W - x)) |
| 66 | len = PLANE_W - x; |
| 67 | |
| 68 | addr = plane_base + ((x + (PLANE_W * y)) << 1); |
| 69 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(addr)); |
| 70 | |
| 71 | while (len-- > 0) { |
| 72 | write16(GFX_DATA_PORT, |
| 73 | basetile | ((*src++) - 32 + TILE_FONT_BASE)); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | static int printf_ypos; |
| 78 | |
| 79 | static void printf_line(int x, const char *buf) |
| 80 | { |
| 81 | u32 addr; |
| 82 | int i; |
| 83 | |
| 84 | if (printf_ypos >= CSCREEN_H) { |
| 85 | } |
| 86 | |
| 87 | VDP_drawTextML(buf, APLANE, x, printf_ypos++ & (PLANE_H - 1)); |
| 88 | |
| 89 | if (printf_ypos >= CSCREEN_H) { |
| 90 | /* clear next line */ |
| 91 | addr = APLANE; |
| 92 | addr += (PLANE_W * (printf_ypos & (PLANE_H - 1))) << 1; |
| 93 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(addr)); |
| 94 | for (i = 0; i < 40 / 2; i++) |
| 95 | write32(GFX_DATA_PORT, 0); |
| 96 | |
| 97 | /* scroll plane */ |
| 98 | write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0)); |
| 99 | write16(GFX_DATA_PORT, (printf_ypos - 27) * 8); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | static noinline int printf(const char *fmt, ...) |
| 104 | { |
| 105 | static int printf_xpos; |
| 106 | char buf[40+11]; |
| 107 | va_list ap; |
| 108 | int ival; |
| 109 | int d = 0; |
| 110 | int i; |
| 111 | |
| 112 | va_start(ap, fmt); |
| 113 | for (d = 0; *fmt; ) { |
| 114 | buf[d] = *fmt++; |
| 115 | if (buf[d] != '%') { |
| 116 | if (buf[d] == '\n') { |
| 117 | buf[d] = 0; |
| 118 | if (d != 0) |
| 119 | printf_line(printf_xpos, buf); |
| 120 | d = 0; |
| 121 | printf_xpos = 0; |
| 122 | continue; |
| 123 | } |
| 124 | d++; |
| 125 | continue; |
| 126 | } |
| 127 | |
| 128 | switch (*fmt++) { |
| 129 | case '%': |
| 130 | d++; |
| 131 | break; |
| 132 | case 'd': |
| 133 | case 'i': |
| 134 | ival = va_arg(ap, int); |
| 135 | if (ival < 0) { |
| 136 | buf[d++] = '-'; |
| 137 | ival = -ival; |
| 138 | } |
| 139 | for (i = 1000000000; i >= 10; i /= 10) |
| 140 | if (ival >= i) |
| 141 | break; |
| 142 | for (; i >= 10; i /= 10) { |
| 143 | buf[d++] = '0' + ival / i; |
| 144 | ival %= i; |
| 145 | } |
| 146 | buf[d++] = '0' + ival; |
| 147 | break; |
| 148 | case 's': |
| 149 | // s = va_arg(ap, char *); |
| 150 | default: |
| 151 | // don't handle, for now |
| 152 | d++; |
| 153 | buf[d++] = *fmt++; |
| 154 | va_arg(ap, void *); |
| 155 | break; |
| 156 | } |
| 157 | } |
| 158 | buf[d] = 0; |
| 159 | va_end(ap); |
| 160 | |
| 161 | if (d != 0) { |
| 162 | // line without \n |
| 163 | VDP_drawTextML(buf, APLANE, printf_xpos, |
| 164 | printf_ypos & (PLANE_H - 1)); |
| 165 | printf_xpos += d; |
| 166 | } |
| 167 | |
| 168 | return d; // wrong.. |
| 169 | } |
| 170 | |
| 171 | void exception(void) |
| 172 | { |
| 173 | VDP_drawTextML("============", APLANE, 0, 0); |
| 174 | VDP_drawTextML(" exception! ", APLANE, 0, 1); |
| 175 | VDP_drawTextML("============", APLANE, 0, 2); |
| 176 | while (1) |
| 177 | ; |
| 178 | } |
| 179 | |
| 180 | void vbl(void) |
| 181 | { |
| 182 | } |
| 183 | |
| 184 | int main() |
| 185 | { |
| 186 | OsRoutine *ed; |
| 187 | int i, j = 0; |
| 188 | |
| 189 | ed = (OsRoutine *) *(u32 *)0x1A0; |
| 190 | ed->memInitDmaCode(); |
| 191 | |
| 192 | ed->VDP_setReg(VDP_MODE1, 0x04); |
| 193 | ed->VDP_setReg(VDP_MODE2, 0x64); |
| 194 | ed->VDP_setReg(VDP_AUTOINC, 2); |
| 195 | ed->VDP_setReg(VDP_SCROLLSZ, 0x01); |
| 196 | |
| 197 | /* clear name tables */ |
| 198 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(APLANE)); |
| 199 | for (i = 0; i < PLANE_W * PLANE_H / 2; i++) |
| 200 | write32(GFX_DATA_PORT, 0); |
| 201 | |
| 202 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(BPLANE)); |
| 203 | for (i = 0; i < PLANE_W * PLANE_H / 2; i++) |
| 204 | write32(GFX_DATA_PORT, 0); |
| 205 | |
| 206 | /* note: relying on ED menu's font setup here.. */ |
| 207 | |
| 208 | // VDP_drawTextML("hello", APLANE, 0, 0); |
| 209 | printf("hello1"); |
| 210 | printf(" hello2\n"); |
| 211 | printf("hello3\n"); |
| 212 | |
| 213 | for (;;) { |
| 214 | for (i = 0; i < 30; i++) |
| 215 | asm volatile("stop #0x2000"); |
| 216 | |
| 217 | printf("hello %d\n", j++); |
| 218 | } |
| 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | // vim:ts=4:sw=4:expandtab |