| 1 | /* |
| 2 | * This software is released into the public domain. |
| 3 | * See UNLICENSE file in top level directory. |
| 4 | */ |
| 5 | #include <stdlib.h> |
| 6 | #include <stdarg.h> |
| 7 | |
| 8 | #define u8 unsigned char |
| 9 | #define u16 unsigned short |
| 10 | #define u32 unsigned int |
| 11 | |
| 12 | #define GFX_DATA_PORT 0xC00000 |
| 13 | #define GFX_CTRL_PORT 0xC00004 |
| 14 | |
| 15 | #define TILE_MEM_END 0xB000 |
| 16 | |
| 17 | #define FONT_LEN 128 |
| 18 | #define TILE_FONT_BASE (TILE_MEM_END - FONT_LEN * 32) |
| 19 | |
| 20 | /* note: using ED menu's layout here.. */ |
| 21 | #define WPLANE (TILE_MEM_END + 0x0000) |
| 22 | #define HSCRL (TILE_MEM_END + 0x0800) |
| 23 | #define SLIST (TILE_MEM_END + 0x0C00) |
| 24 | #define APLANE (TILE_MEM_END + 0x1000) |
| 25 | #define BPLANE (TILE_MEM_END + 0x3000) |
| 26 | |
| 27 | #define read8(a) \ |
| 28 | *((volatile u8 *) (a)) |
| 29 | #define read16(a) \ |
| 30 | *((volatile u16 *) (a)) |
| 31 | #define read32(a) \ |
| 32 | *((volatile u32 *) (a)) |
| 33 | #define write16(a, d) \ |
| 34 | *((volatile u16 *) (a)) = (d) |
| 35 | #define write32(a, d) \ |
| 36 | *((volatile u32 *) (a)) = (d) |
| 37 | |
| 38 | #define GFX_WRITE_VRAM_ADDR(adr) \ |
| 39 | (((0x4000 | ((adr) & 0x3FFF)) << 16) | ((adr) >> 14) | 0x00) |
| 40 | #define GFX_WRITE_VSRAM_ADDR(adr) \ |
| 41 | (((0x4000 | ((adr) & 0x3FFF)) << 16) | ((adr) >> 14) | 0x10) |
| 42 | #define GFX_WRITE_CRAM_ADDR(adr) \ |
| 43 | (((0xC000 | ((adr) & 0x3FFF)) << 16) | ((adr) >> 14) | 0x00) |
| 44 | |
| 45 | #define VDP_setReg(r, v) \ |
| 46 | write16(GFX_CTRL_PORT, 0x8000 | ((r) << 8) | (v)) |
| 47 | |
| 48 | enum { |
| 49 | VDP_MODE1 = 0x00, |
| 50 | VDP_MODE2 = 0x01, |
| 51 | VDP_NT_SCROLLA = 0x02, |
| 52 | VDP_NT_WIN = 0x03, |
| 53 | VDP_NT_SCROLLB = 0x04, |
| 54 | VDP_SAT_BASE = 0x05, |
| 55 | VDP_BACKDROP = 0x07, |
| 56 | VDP_MODE3 = 0x0b, |
| 57 | VDP_MODE4 = 0x0c, |
| 58 | VDP_HSCROLL = 0x0d, |
| 59 | VDP_AUTOINC = 0x0f, |
| 60 | VDP_SCROLLSZ = 0x10, |
| 61 | }; |
| 62 | |
| 63 | /* cell counts */ |
| 64 | #define LEFT_BORDER 1 /* lame TV */ |
| 65 | #define PLANE_W 64 |
| 66 | #define PLANE_H 32 |
| 67 | #define CSCREEN_H 28 |
| 68 | |
| 69 | static void VDP_drawTextML(const char *str, u16 plane_base, |
| 70 | u16 x, u16 y) |
| 71 | { |
| 72 | const u8 *src = (const u8 *)str; |
| 73 | u16 basetile = 0; |
| 74 | int max_len = 40 - LEFT_BORDER; |
| 75 | int len; |
| 76 | u32 addr; |
| 77 | |
| 78 | x += LEFT_BORDER; |
| 79 | |
| 80 | for (len = 0; str[len] && len < max_len; len++) |
| 81 | ; |
| 82 | if (len > (PLANE_W - x)) |
| 83 | len = PLANE_W - x; |
| 84 | |
| 85 | addr = plane_base + ((x + (PLANE_W * y)) << 1); |
| 86 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(addr)); |
| 87 | |
| 88 | while (len-- > 0) { |
| 89 | write16(GFX_DATA_PORT, |
| 90 | basetile | ((*src++) - 32 + TILE_FONT_BASE / 32)); |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | static int printf_ypos; |
| 95 | |
| 96 | static void printf_line(int x, const char *buf) |
| 97 | { |
| 98 | u32 addr; |
| 99 | int i; |
| 100 | |
| 101 | VDP_drawTextML(buf, APLANE, x, printf_ypos++ & (PLANE_H - 1)); |
| 102 | |
| 103 | if (printf_ypos >= CSCREEN_H) { |
| 104 | /* clear next line */ |
| 105 | addr = APLANE; |
| 106 | addr += (PLANE_W * (printf_ypos & (PLANE_H - 1))) << 1; |
| 107 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(addr)); |
| 108 | for (i = 0; i < 40 / 2; i++) |
| 109 | write32(GFX_DATA_PORT, 0); |
| 110 | |
| 111 | /* scroll plane */ |
| 112 | write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0)); |
| 113 | write16(GFX_DATA_PORT, (printf_ypos - CSCREEN_H + 1) * 8); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | #define PRINTF_LEN 40 |
| 118 | |
| 119 | static int printf(const char *fmt, ...) |
| 120 | { |
| 121 | static const char hexchars[] = "0123456789abcdef"; |
| 122 | static int printf_xpos; |
| 123 | char c, buf[PRINTF_LEN + 11 + 1]; |
| 124 | const char *s; |
| 125 | va_list ap; |
| 126 | int ival; |
| 127 | u32 uval; |
| 128 | int d = 0; |
| 129 | int i, j; |
| 130 | |
| 131 | va_start(ap, fmt); |
| 132 | for (d = 0; *fmt; ) { |
| 133 | int prefix0 = 0; |
| 134 | int fwidth = 0; |
| 135 | |
| 136 | c = *fmt++; |
| 137 | if (d < PRINTF_LEN) |
| 138 | buf[d] = c; |
| 139 | |
| 140 | if (c != '%') { |
| 141 | if (c == '\n') { |
| 142 | buf[d] = 0; |
| 143 | printf_line(printf_xpos, buf); |
| 144 | d = 0; |
| 145 | printf_xpos = 0; |
| 146 | continue; |
| 147 | } |
| 148 | d++; |
| 149 | continue; |
| 150 | } |
| 151 | if (d >= PRINTF_LEN) |
| 152 | continue; |
| 153 | |
| 154 | if (*fmt == '0') { |
| 155 | prefix0 = 1; |
| 156 | fmt++; |
| 157 | } |
| 158 | |
| 159 | while ('1' <= *fmt && *fmt <= '9') { |
| 160 | fwidth = fwidth * 10 + *fmt - '0'; |
| 161 | fmt++; |
| 162 | } |
| 163 | |
| 164 | switch (*fmt++) { |
| 165 | case '%': |
| 166 | d++; |
| 167 | break; |
| 168 | case 'd': |
| 169 | case 'i': |
| 170 | ival = va_arg(ap, int); |
| 171 | if (ival < 0) { |
| 172 | buf[d++] = '-'; |
| 173 | ival = -ival; |
| 174 | } |
| 175 | for (i = 1000000000; i >= 10; i /= 10) |
| 176 | if (ival >= i) |
| 177 | break; |
| 178 | for (; i >= 10; i /= 10) { |
| 179 | buf[d++] = '0' + ival / i; |
| 180 | ival %= i; |
| 181 | } |
| 182 | buf[d++] = '0' + ival; |
| 183 | break; |
| 184 | case 'x': |
| 185 | uval = va_arg(ap, int); |
| 186 | while (fwidth > 1 && uval < (1 << (fwidth - 1) * 4)) { |
| 187 | buf[d++] = prefix0 ? '0' : ' '; |
| 188 | fwidth--; |
| 189 | } |
| 190 | for (j = 1; j < 8 && uval >= (1 << j * 4); j++) |
| 191 | ; |
| 192 | for (j--; j >= 0; j--) |
| 193 | buf[d++] = hexchars[(uval >> j * 4) & 0x0f]; |
| 194 | break; |
| 195 | case 's': |
| 196 | s = va_arg(ap, char *); |
| 197 | while (*s && d < PRINTF_LEN) |
| 198 | buf[d++] = *s++; |
| 199 | break; |
| 200 | default: |
| 201 | // don't handle, for now |
| 202 | d++; |
| 203 | va_arg(ap, void *); |
| 204 | break; |
| 205 | } |
| 206 | } |
| 207 | buf[d] = 0; |
| 208 | va_end(ap); |
| 209 | |
| 210 | if (d != 0) { |
| 211 | // line without \n |
| 212 | VDP_drawTextML(buf, APLANE, printf_xpos, |
| 213 | printf_ypos & (PLANE_H - 1)); |
| 214 | printf_xpos += d; |
| 215 | } |
| 216 | |
| 217 | return d; // wrong.. |
| 218 | } |
| 219 | |
| 220 | extern u32 font_base[]; |
| 221 | extern u8 test_data[]; |
| 222 | extern u8 test_data_end[]; |
| 223 | |
| 224 | int main() |
| 225 | { |
| 226 | volatile u32 *vptr; |
| 227 | u32 old; |
| 228 | u8 bad = 0; |
| 229 | u8 *p, val; |
| 230 | int i, t, len; |
| 231 | |
| 232 | /* z80 */ |
| 233 | write16(0xa11100, 0x100); |
| 234 | write16(0xa11200, 0); |
| 235 | |
| 236 | /* setup VDP */ |
| 237 | while (read16(GFX_CTRL_PORT) & 2) |
| 238 | ; |
| 239 | |
| 240 | VDP_setReg(VDP_MODE1, 0x04); |
| 241 | VDP_setReg(VDP_MODE2, 0x64); |
| 242 | VDP_setReg(VDP_MODE3, 0x00); |
| 243 | VDP_setReg(VDP_MODE4, 0x81); |
| 244 | VDP_setReg(VDP_NT_SCROLLA, APLANE >> 10); |
| 245 | VDP_setReg(VDP_NT_SCROLLB, BPLANE >> 13); |
| 246 | VDP_setReg(VDP_SAT_BASE, SLIST >> 9); |
| 247 | VDP_setReg(VDP_HSCROLL, HSCRL >> 10); |
| 248 | VDP_setReg(VDP_AUTOINC, 2); |
| 249 | VDP_setReg(VDP_SCROLLSZ, 0x01); |
| 250 | VDP_setReg(VDP_BACKDROP, 0); |
| 251 | |
| 252 | /* clear name tables */ |
| 253 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(APLANE)); |
| 254 | for (i = 0; i < PLANE_W * PLANE_H / 2; i++) |
| 255 | write32(GFX_DATA_PORT, 0); |
| 256 | |
| 257 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(BPLANE)); |
| 258 | for (i = 0; i < PLANE_W * PLANE_H / 2; i++) |
| 259 | write32(GFX_DATA_PORT, 0); |
| 260 | |
| 261 | /* SAT, h. scroll */ |
| 262 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(SLIST)); |
| 263 | write32(GFX_DATA_PORT, 0); |
| 264 | |
| 265 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(HSCRL)); |
| 266 | write32(GFX_DATA_PORT, 0); |
| 267 | |
| 268 | /* scroll plane vscroll */ |
| 269 | write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0)); |
| 270 | write32(GFX_DATA_PORT, 0); |
| 271 | printf_ypos = 0; |
| 272 | |
| 273 | /* load font */ |
| 274 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(TILE_FONT_BASE)); |
| 275 | for (i = 0; i < FONT_LEN * 32 / 4; i++) |
| 276 | write32(GFX_DATA_PORT, font_base[i]); |
| 277 | |
| 278 | /* set colors */ |
| 279 | write32(GFX_CTRL_PORT, GFX_WRITE_CRAM_ADDR(0)); |
| 280 | write32(GFX_DATA_PORT, 0); |
| 281 | write32(GFX_CTRL_PORT, GFX_WRITE_CRAM_ADDR(15 * 2)); // font |
| 282 | write16(GFX_DATA_PORT, 0xeee); |
| 283 | |
| 284 | printf("\n"); |
| 285 | printf("MD version: %02x\n", read8(0xa10001)); |
| 286 | printf("ROM writable? "); |
| 287 | |
| 288 | vptr = (void *)0x120; |
| 289 | old = *vptr; |
| 290 | *vptr ^= ~0; |
| 291 | printf(*vptr == old ? "no" : "yes"); |
| 292 | printf("\n\n"); |
| 293 | |
| 294 | p = test_data; |
| 295 | len = test_data_end - test_data; |
| 296 | |
| 297 | for (t = 1; ; t++) { |
| 298 | printf("executing stop.. "); |
| 299 | for (i = 0; i < 5 * 60; i++) |
| 300 | asm volatile("stop #0x2000" ::: "cc"); |
| 301 | printf("done\n"); |
| 302 | |
| 303 | printf("checking memory..\n"); |
| 304 | |
| 305 | val = 0; |
| 306 | for (i = 0; i < len; i++) { |
| 307 | if (p[i] != val) { |
| 308 | printf("bad: %06x: got %02x, expected %02x\n", |
| 309 | &p[i], p[i], val); |
| 310 | bad = 1; |
| 311 | } |
| 312 | val++; |
| 313 | } |
| 314 | |
| 315 | printf("done. Try %d: test ", t); |
| 316 | if (bad) { |
| 317 | printf("FAILED\n"); |
| 318 | break; |
| 319 | } |
| 320 | printf("PASSED\n"); |
| 321 | } |
| 322 | |
| 323 | write32(GFX_CTRL_PORT, GFX_WRITE_CRAM_ADDR(0)); |
| 324 | write16(GFX_DATA_PORT, 0x008); |
| 325 | |
| 326 | /* there are not enough STOP opcodes in this world :D */ |
| 327 | while (1) |
| 328 | asm volatile("stop #0x2000" ::: "cc"); |
| 329 | |
| 330 | return 0; |
| 331 | } |
| 332 | |
| 333 | // vim:ts=4:sw=4:expandtab |