25055eb3 |
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)); |
3ee911dc |
286 | printf("ROM writable? "); |
25055eb3 |
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 |