| 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 noinline __attribute__((noinline)) |
| 13 | #define unused __attribute__((unused)) |
| 14 | #define _packed __attribute__((packed)) |
| 15 | |
| 16 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) |
| 17 | |
| 18 | #include "asmtools.h" |
| 19 | |
| 20 | #define GFX_DATA_PORT 0xC00000 |
| 21 | #define GFX_CTRL_PORT 0xC00004 |
| 22 | |
| 23 | #define TILE_MEM_END 0xB000 |
| 24 | |
| 25 | #define FONT_LEN 128 |
| 26 | #define TILE_FONT_BASE (TILE_MEM_END / 32 - FONT_LEN) |
| 27 | |
| 28 | /* note: using ED menu's layout here.. */ |
| 29 | #define WPLANE (TILE_MEM_END + 0x0000) |
| 30 | #define HSCRL (TILE_MEM_END + 0x0800) |
| 31 | #define SLIST (TILE_MEM_END + 0x0C00) |
| 32 | #define APLANE (TILE_MEM_END + 0x1000) |
| 33 | #define BPLANE (TILE_MEM_END + 0x3000) |
| 34 | |
| 35 | #define read8(a) \ |
| 36 | *((volatile u8 *) (a)) |
| 37 | #define read16(a) \ |
| 38 | *((volatile u16 *) (a)) |
| 39 | #define read32(a) \ |
| 40 | *((volatile u32 *) (a)) |
| 41 | #define write8(a, d) \ |
| 42 | *((volatile u8 *) (a)) = (d) |
| 43 | #define write16(a, d) \ |
| 44 | *((volatile u16 *) (a)) = (d) |
| 45 | #define write32(a, d) \ |
| 46 | *((volatile u32 *) (a)) = (d) |
| 47 | |
| 48 | #define GFX_WRITE_VRAM_ADDR(adr) \ |
| 49 | (((0x4000 | ((adr) & 0x3FFF)) << 16) | ((adr) >> 14) | 0x00) |
| 50 | #define GFX_WRITE_VSRAM_ADDR(adr) \ |
| 51 | (((0x4000 | ((adr) & 0x3FFF)) << 16) | ((adr) >> 14) | 0x10) |
| 52 | #define GFX_WRITE_CRAM_ADDR(adr) \ |
| 53 | (((0xC000 | ((adr) & 0x3FFF)) << 16) | ((adr) >> 14) | 0x00) |
| 54 | |
| 55 | #define VDP_setReg(r, v) \ |
| 56 | write16(GFX_CTRL_PORT, 0x8000 | ((r) << 8) | (v)) |
| 57 | |
| 58 | enum { |
| 59 | VDP_MODE1 = 0x00, |
| 60 | VDP_MODE2 = 0x01, |
| 61 | VDP_NT_SCROLLA = 0x02, |
| 62 | VDP_NT_WIN = 0x03, |
| 63 | VDP_NT_SCROLLB = 0x04, |
| 64 | VDP_SAT_BASE = 0x05, |
| 65 | VDP_BACKDROP = 0x07, |
| 66 | VDP_MODE3 = 0x0b, |
| 67 | VDP_MODE4 = 0x0c, |
| 68 | VDP_HSCROLL = 0x0d, |
| 69 | VDP_AUTOINC = 0x0f, |
| 70 | VDP_SCROLLSZ = 0x10, |
| 71 | }; |
| 72 | |
| 73 | /* cell counts */ |
| 74 | #define LEFT_BORDER 1 /* lame TV */ |
| 75 | #define PLANE_W 64 |
| 76 | #define PLANE_H 32 |
| 77 | #define CSCREEN_H 28 |
| 78 | |
| 79 | static int text_pal; |
| 80 | |
| 81 | static noinline void VDP_drawTextML(const char *str, u16 plane_base, |
| 82 | u16 x, u16 y) |
| 83 | { |
| 84 | const u8 *src = (const u8 *)str; |
| 85 | u16 basetile = text_pal << 13; |
| 86 | int max_len = 40 - LEFT_BORDER; |
| 87 | int len; |
| 88 | u32 addr; |
| 89 | |
| 90 | x += LEFT_BORDER; |
| 91 | |
| 92 | for (len = 0; str[len] && len < max_len; len++) |
| 93 | ; |
| 94 | if (len > (PLANE_W - x)) |
| 95 | len = PLANE_W - x; |
| 96 | |
| 97 | addr = plane_base + ((x + (PLANE_W * y)) << 1); |
| 98 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(addr)); |
| 99 | |
| 100 | while (len-- > 0) { |
| 101 | write16(GFX_DATA_PORT, |
| 102 | basetile | ((*src++) - 32 + TILE_FONT_BASE / 32)); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | static int printf_ypos; |
| 107 | |
| 108 | static void printf_line(int x, const char *buf) |
| 109 | { |
| 110 | u32 addr; |
| 111 | int i; |
| 112 | |
| 113 | VDP_drawTextML(buf, APLANE, x, printf_ypos++ & (PLANE_H - 1)); |
| 114 | |
| 115 | if (printf_ypos >= CSCREEN_H) { |
| 116 | /* clear next line */ |
| 117 | addr = APLANE; |
| 118 | addr += (PLANE_W * (printf_ypos & (PLANE_H - 1))) << 1; |
| 119 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(addr)); |
| 120 | for (i = 0; i < 40 / 2; i++) |
| 121 | write32(GFX_DATA_PORT, 0); |
| 122 | |
| 123 | /* scroll plane */ |
| 124 | write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0)); |
| 125 | write16(GFX_DATA_PORT, (printf_ypos - CSCREEN_H + 1) * 8); |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | #define PRINTF_LEN 40 |
| 130 | |
| 131 | static int printf_xpos; |
| 132 | |
| 133 | static noinline int printf(const char *fmt, ...) |
| 134 | { |
| 135 | static const char hexchars[] = "0123456789abcdef"; |
| 136 | char c, buf[PRINTF_LEN + 11 + 1]; |
| 137 | const char *s; |
| 138 | va_list ap; |
| 139 | int ival; |
| 140 | u32 uval; |
| 141 | int d = 0; |
| 142 | int i, j; |
| 143 | |
| 144 | va_start(ap, fmt); |
| 145 | for (d = 0; *fmt; ) { |
| 146 | int prefix0 = 0; |
| 147 | int fwidth = 0; |
| 148 | |
| 149 | c = *fmt++; |
| 150 | if (d < PRINTF_LEN) |
| 151 | buf[d] = c; |
| 152 | |
| 153 | if (c != '%') { |
| 154 | if (c == '\n') { |
| 155 | buf[d] = 0; |
| 156 | printf_line(printf_xpos, buf); |
| 157 | d = 0; |
| 158 | printf_xpos = 0; |
| 159 | continue; |
| 160 | } |
| 161 | d++; |
| 162 | continue; |
| 163 | } |
| 164 | if (d >= PRINTF_LEN) |
| 165 | continue; |
| 166 | |
| 167 | if (*fmt == '0') { |
| 168 | prefix0 = 1; |
| 169 | fmt++; |
| 170 | } |
| 171 | |
| 172 | while ('1' <= *fmt && *fmt <= '9') { |
| 173 | fwidth = fwidth * 10 + *fmt - '0'; |
| 174 | fmt++; |
| 175 | } |
| 176 | |
| 177 | switch (*fmt++) { |
| 178 | case '%': |
| 179 | d++; |
| 180 | break; |
| 181 | case 'd': |
| 182 | case 'i': |
| 183 | ival = va_arg(ap, int); |
| 184 | if (ival < 0) { |
| 185 | buf[d++] = '-'; |
| 186 | ival = -ival; |
| 187 | } |
| 188 | for (i = 1000000000; i >= 10; i /= 10) |
| 189 | if (ival >= i) |
| 190 | break; |
| 191 | for (; i >= 10; i /= 10) { |
| 192 | buf[d++] = '0' + ival / i; |
| 193 | ival %= i; |
| 194 | } |
| 195 | buf[d++] = '0' + ival; |
| 196 | break; |
| 197 | case 'x': |
| 198 | uval = va_arg(ap, int); |
| 199 | while (fwidth > 1 && uval < (1 << (fwidth - 1) * 4)) { |
| 200 | buf[d++] = prefix0 ? '0' : ' '; |
| 201 | fwidth--; |
| 202 | } |
| 203 | for (j = 1; j < 8 && uval >= (1 << j * 4); j++) |
| 204 | ; |
| 205 | for (j--; j >= 0; j--) |
| 206 | buf[d++] = hexchars[(uval >> j * 4) & 0x0f]; |
| 207 | break; |
| 208 | case 's': |
| 209 | s = va_arg(ap, char *); |
| 210 | while (*s && d < PRINTF_LEN) |
| 211 | buf[d++] = *s++; |
| 212 | break; |
| 213 | default: |
| 214 | // don't handle, for now |
| 215 | d++; |
| 216 | va_arg(ap, void *); |
| 217 | break; |
| 218 | } |
| 219 | } |
| 220 | buf[d] = 0; |
| 221 | va_end(ap); |
| 222 | |
| 223 | if (d != 0) { |
| 224 | // line without \n |
| 225 | VDP_drawTextML(buf, APLANE, printf_xpos, |
| 226 | printf_ypos & (PLANE_H - 1)); |
| 227 | printf_xpos += d; |
| 228 | } |
| 229 | |
| 230 | return d; // wrong.. |
| 231 | } |
| 232 | |
| 233 | static const char *exc_names[] = { |
| 234 | NULL, |
| 235 | NULL, |
| 236 | "Bus Error", |
| 237 | "Address Error", |
| 238 | "Illegal Instruction", |
| 239 | "Zero Divide", |
| 240 | "CHK Instruction", |
| 241 | "TRAPV Instruction", |
| 242 | "Privilege Violation", /* 8 8 */ |
| 243 | "Trace", |
| 244 | "Line 1010 Emulator", |
| 245 | "Line 1111 Emulator", |
| 246 | NULL, |
| 247 | NULL, |
| 248 | NULL, |
| 249 | "Uninitialized Interrupt", |
| 250 | NULL, /* 10 16 */ |
| 251 | NULL, |
| 252 | NULL, |
| 253 | NULL, |
| 254 | NULL, |
| 255 | NULL, |
| 256 | NULL, |
| 257 | NULL, |
| 258 | "Spurious Interrupt", /* 18 24 */ |
| 259 | "l1 irq", |
| 260 | "l2 irq", |
| 261 | "l3 irq", |
| 262 | "l4 irq", |
| 263 | "l5 irq", |
| 264 | "l6 irq", |
| 265 | "l7 irq", |
| 266 | }; |
| 267 | |
| 268 | struct exc_frame { |
| 269 | u32 dr[8]; |
| 270 | u32 ar[8]; |
| 271 | u16 ecxnum; // from handler |
| 272 | union { |
| 273 | struct { |
| 274 | u16 sr; |
| 275 | u32 pc; |
| 276 | } g _packed; |
| 277 | struct { |
| 278 | u16 fc; |
| 279 | u32 addr; |
| 280 | u16 ir; |
| 281 | u16 sr; |
| 282 | u32 pc; |
| 283 | } bae _packed; // bus/address error frame |
| 284 | }; |
| 285 | } _packed; |
| 286 | |
| 287 | int xtttt(void) { return sizeof(struct exc_frame); } |
| 288 | |
| 289 | void exception(const struct exc_frame *f) |
| 290 | { |
| 291 | int i; |
| 292 | |
| 293 | while (read16(GFX_CTRL_PORT) & 2) |
| 294 | ; |
| 295 | write16(GFX_CTRL_PORT, 0x8000 | (VDP_MODE1 << 8) | 0x04); |
| 296 | write16(GFX_CTRL_PORT, 0x8000 | (VDP_MODE2 << 8) | 0x44); |
| 297 | /* adjust scroll */ |
| 298 | write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0)); |
| 299 | write16(GFX_DATA_PORT, |
| 300 | printf_ypos >= CSCREEN_H ? |
| 301 | (printf_ypos - CSCREEN_H + 1) * 8 : 0); |
| 302 | |
| 303 | printf("exception %i ", f->ecxnum); |
| 304 | if (f->ecxnum < ARRAY_SIZE(exc_names) && exc_names[f->ecxnum] != NULL) |
| 305 | printf("(%s)", exc_names[f->ecxnum]); |
| 306 | if (f->ecxnum < 4) |
| 307 | printf(" (%s)", (f->bae.fc & 0x10) ? "r" : "w"); |
| 308 | printf(" \n"); |
| 309 | |
| 310 | if (f->ecxnum < 4) { |
| 311 | printf(" PC: %08x SR: %04x \n", f->bae.pc, f->bae.sr); |
| 312 | printf("addr: %08x IR: %04x FC: %02x \n", |
| 313 | f->bae.addr, f->bae.ir, f->bae.fc); |
| 314 | } |
| 315 | else { |
| 316 | printf(" PC: %08x SR: %04x \n", f->g.pc, f->g.sr); |
| 317 | } |
| 318 | for (i = 0; i < 8; i++) |
| 319 | printf(" D%d: %08x A%d: %08x \n", i, f->dr[i], i, f->ar[i]); |
| 320 | printf(" \n"); |
| 321 | } |
| 322 | |
| 323 | extern u32 font_base[]; |
| 324 | extern u8 test_data[]; |
| 325 | extern u8 test_data_end[]; |
| 326 | |
| 327 | static void simple_test(int *odd, int *even, int *rom) |
| 328 | { |
| 329 | u32 old, new, v0, v1; |
| 330 | |
| 331 | *odd = *even = *rom = 0; |
| 332 | old = read16(0x200000); |
| 333 | new = old ^ 0xa55a; |
| 334 | write16(0x200000, new); |
| 335 | v0 = read16(0x200000); |
| 336 | write8(0x200000, ~new >> 8); |
| 337 | write8(0x200001, ~new); |
| 338 | //write16(0x200000, ~new); |
| 339 | v1 = read16(0x200000); |
| 340 | if (((v0 ^ new) & 0xff00) == 0 && ((v1 ^ ~new) & 0xff00) == 0) { |
| 341 | printf(" even"); |
| 342 | *even = 1; |
| 343 | } |
| 344 | if (((v0 ^ new) & 0x00ff) == 0 && ((v1 ^ ~new) & 0x00ff) == 0) { |
| 345 | printf(" odd"); |
| 346 | *odd = 1; |
| 347 | } |
| 348 | if (v0 == old && v1 == old) { |
| 349 | printf(" ROM"); |
| 350 | *rom = 1; |
| 351 | } |
| 352 | else if (!(*odd | *even)) { |
| 353 | text_pal = 2; |
| 354 | printf(" bad value"); |
| 355 | text_pal = 0; |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | static int detect_size(u8 *a) |
| 360 | { |
| 361 | int i, v; |
| 362 | |
| 363 | write8(a, 0); |
| 364 | for (i = 2, v = 1; i < 0x200000; i <<= 1, v++) { |
| 365 | write8(a + i, v); |
| 366 | if (read8(a) || read8(a + i) != v) |
| 367 | break; |
| 368 | } |
| 369 | return i > 2 ? i / 2 : 0; |
| 370 | } |
| 371 | |
| 372 | static unused void fill(u8 *d, unsigned int size, u8 val) |
| 373 | { |
| 374 | unsigned int i; |
| 375 | |
| 376 | for (i = 0; i < size * 2; i += 2) |
| 377 | d[i] = val; |
| 378 | } |
| 379 | |
| 380 | static int check(u8 *d, unsigned int size, u8 val) |
| 381 | { |
| 382 | unsigned int i; |
| 383 | |
| 384 | for (i = 0; i < size * 2; i += 2) |
| 385 | if (d[i] != val) |
| 386 | break; |
| 387 | |
| 388 | if (i == size * 2) |
| 389 | return 1; |
| 390 | |
| 391 | text_pal = 2; |
| 392 | printf("\nfailed at byte %x, val %02x vs %02x\n", |
| 393 | i / 2, d[i], val); |
| 394 | text_pal = 0; |
| 395 | return 0; |
| 396 | } |
| 397 | |
| 398 | static void do_test(u8 *d, unsigned int size) |
| 399 | { |
| 400 | int spos = printf_xpos; |
| 401 | int i; |
| 402 | |
| 403 | for (i = 0; i < 0x100; i++) { |
| 404 | printf_xpos = spos; |
| 405 | printf("%02x", i); |
| 406 | //fill(d, size, i); |
| 407 | fillpx16(d, size / 16, i); |
| 408 | if (!checkpx4(d, size / 4, i)) { |
| 409 | check(d, size, i); // for log |
| 410 | break; |
| 411 | } |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | int main() |
| 416 | { |
| 417 | volatile u32 *vptr32; |
| 418 | int odd, even, rom; |
| 419 | u32 old; |
| 420 | int i; |
| 421 | |
| 422 | /* z80 */ |
| 423 | write16(0xa11100, 0x100); |
| 424 | write16(0xa11200, 0); |
| 425 | |
| 426 | /* setup VDP */ |
| 427 | while (read16(GFX_CTRL_PORT) & 2) |
| 428 | ; |
| 429 | |
| 430 | VDP_setReg(VDP_MODE1, 0x04); |
| 431 | VDP_setReg(VDP_MODE2, 0x44); |
| 432 | VDP_setReg(VDP_MODE3, 0x00); |
| 433 | VDP_setReg(VDP_MODE4, 0x81); |
| 434 | VDP_setReg(VDP_NT_SCROLLA, APLANE >> 10); |
| 435 | VDP_setReg(VDP_NT_SCROLLB, BPLANE >> 13); |
| 436 | VDP_setReg(VDP_SAT_BASE, SLIST >> 9); |
| 437 | VDP_setReg(VDP_HSCROLL, HSCRL >> 10); |
| 438 | VDP_setReg(VDP_AUTOINC, 2); |
| 439 | VDP_setReg(VDP_SCROLLSZ, 0x01); |
| 440 | VDP_setReg(VDP_BACKDROP, 0); |
| 441 | |
| 442 | /* pattern 0 */ |
| 443 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(0)); |
| 444 | for (i = 0; i < 32 / 4; i++) |
| 445 | write32(GFX_DATA_PORT, 0); |
| 446 | |
| 447 | /* clear name tables */ |
| 448 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(APLANE)); |
| 449 | for (i = 0; i < PLANE_W * PLANE_H / 2; i++) |
| 450 | write32(GFX_DATA_PORT, 0); |
| 451 | |
| 452 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(BPLANE)); |
| 453 | for (i = 0; i < PLANE_W * PLANE_H / 2; i++) |
| 454 | write32(GFX_DATA_PORT, 0); |
| 455 | |
| 456 | /* SAT, h. scroll */ |
| 457 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(SLIST)); |
| 458 | write32(GFX_DATA_PORT, 0); |
| 459 | |
| 460 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(HSCRL)); |
| 461 | write32(GFX_DATA_PORT, 0); |
| 462 | |
| 463 | /* scroll plane vscroll */ |
| 464 | write32(GFX_CTRL_PORT, GFX_WRITE_VSRAM_ADDR(0)); |
| 465 | write32(GFX_DATA_PORT, 0); |
| 466 | printf_xpos = printf_ypos = 0; |
| 467 | |
| 468 | /* load font */ |
| 469 | write32(GFX_CTRL_PORT, GFX_WRITE_VRAM_ADDR(TILE_FONT_BASE)); |
| 470 | for (i = 0; i < FONT_LEN * 32 / 4; i++) |
| 471 | write32(GFX_DATA_PORT, font_base[i]); |
| 472 | |
| 473 | /* set colors */ |
| 474 | write32(GFX_CTRL_PORT, GFX_WRITE_CRAM_ADDR(0)); |
| 475 | write32(GFX_DATA_PORT, 0); |
| 476 | write32(GFX_CTRL_PORT, GFX_WRITE_CRAM_ADDR(15 * 2)); // font normal |
| 477 | write16(GFX_DATA_PORT, 0xeee); |
| 478 | write32(GFX_CTRL_PORT, GFX_WRITE_CRAM_ADDR(31 * 2)); // green |
| 479 | write16(GFX_DATA_PORT, 0x0e0); |
| 480 | write32(GFX_CTRL_PORT, GFX_WRITE_CRAM_ADDR(47 * 2)); // red |
| 481 | write16(GFX_DATA_PORT, 0x00e); |
| 482 | text_pal = 0; |
| 483 | |
| 484 | printf("\n"); |
| 485 | printf("MD version: %02x\n", read8(0xa10001)); |
| 486 | printf("ROM writable? "); |
| 487 | |
| 488 | vptr32 = (void *)0x120; |
| 489 | old = *vptr32; |
| 490 | *vptr32 ^= ~0; |
| 491 | printf("%s\n", *vptr32 == old ? "no" : "yes"); |
| 492 | |
| 493 | printf("200000 initial state:"); |
| 494 | simple_test(&odd, &even, &rom); |
| 495 | |
| 496 | printf("\nenable with i0: "); |
| 497 | write_rreg_i0(1); |
| 498 | simple_test(&odd, &even, &rom); |
| 499 | |
| 500 | printf("\ndisable with i0:"); |
| 501 | write_rreg_i0(0); |
| 502 | simple_test(&odd, &even, &rom); |
| 503 | |
| 504 | printf("\nenable with i1: "); |
| 505 | write_rreg_i1(1); |
| 506 | simple_test(&odd, &even, &rom); |
| 507 | |
| 508 | printf("\ndisable with i1:"); |
| 509 | write_rreg_i1(0); |
| 510 | simple_test(&odd, &even, &rom); |
| 511 | |
| 512 | printf("\nenable with 16: "); |
| 513 | write16(0xa130f0, 1); |
| 514 | simple_test(&odd, &even, &rom); |
| 515 | printf("\n"); |
| 516 | |
| 517 | if (even) { |
| 518 | even = detect_size((void *)0x200000); |
| 519 | printf("detected even size: %d\n", even); |
| 520 | } |
| 521 | if (odd) { |
| 522 | odd = detect_size((void *)0x200001); |
| 523 | printf("detected odd size: %d\n", odd); |
| 524 | } |
| 525 | if (even) { |
| 526 | printf("testing even: ", even); |
| 527 | do_test((void *)0x200000, even); |
| 528 | printf("\n"); |
| 529 | } |
| 530 | if (odd) { |
| 531 | printf("testing odd: ", odd); |
| 532 | do_test((void *)0x200001, odd); |
| 533 | printf("\n"); |
| 534 | } |
| 535 | |
| 536 | if (!odd && !even) { |
| 537 | text_pal = 2; |
| 538 | printf("no RAM\n"); |
| 539 | text_pal = 0; |
| 540 | } |
| 541 | |
| 542 | printf("done.\n"); |
| 543 | |
| 544 | for (;;) |
| 545 | ; |
| 546 | |
| 547 | return 0; |
| 548 | } |
| 549 | |
| 550 | // vim:ts=4:sw=4:expandtab |