1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
|
static time_t seconds = 1693475007;
#define RAM_PAGES 0x10
void
deo_console(u8 *dev, u8 port) {
switch(port) {
case 0x8:
txt_putc(dev[port]);
return;
case 0x9:
txt_printf("ERROR: %c");
txt_putc(dev[port]);
return;
}
}
u16
dei_screen(u8 *dev, u8 port) {
switch(port) {
case 0x0:
case 0x8:
case 0xa:
case 0xc: return PEEK2(dev + port);
case 0x2: return SCREEN_WIDTH;
case 0x4: return SCREEN_HEIGHT;
default: return dev[port];
}
}
u16
dei_mouse(u8 *dev, u8 port) {
switch(port) {
case 0x0:
case 0x2:
case 0x4:
case 0xa:
case 0xc: return PEEK2(dev + port);
default: return dev[port];
}
}
void
deo_screen(u8 *dev, u8 port) {
switch(port) {
case 0xe: {
u8 ctrl = dev[0xe];
u8 color = ctrl & 0x3;
u16 x0 = PEEK2(dev + 0x8);
u16 y0 = PEEK2(dev + 0xa);
u8 *layer = (ctrl & 0x40) ? FG_BACK : BG_BACK;
if(ctrl & 0x80) {
u16 x1 = SCREEN_WIDTH - 1;
u16 y1 = SCREEN_HEIGHT - 1;
if(ctrl & 0x10) x1 = x0, x0 = 0;
if(ctrl & 0x20) y1 = y0, y0 = 0;
PROF(screen_fill(layer, x0, y0, x1, y1, color), ppu_fill_cycles);
} else {
PROF(ppu_pixel(layer, x0, y0, color), ppu_pixel_cycles);
if(dev[0x6] & 0x1) POKE2(dev + 0x8, x0 + 1); /* auto x+1 */
if(dev[0x6] & 0x2) POKE2(dev + 0xa, y0 + 1); /* auto y+1 */
}
break;
}
case 0xf: {
u8 ctrl = dev[0xf];
u8 move = dev[0x6];
u8 length = move >> 4;
u8 twobpp = !!(ctrl & 0x80);
u8 *layer = (dev[0xf] & 0x40) ? FG_BACK : BG_BACK;
u8 color = ctrl & 0xf;
u16 x = PEEK2(dev + 0x8), dx = (move & 0x1) << 3;
u16 y = PEEK2(dev + 0xa), dy = (move & 0x2) << 2;
u16 addr = PEEK2(dev + 0xc), addr_incr = (move & 0x4) << (1 + twobpp);
int flipx = (ctrl & 0x10), fx = flipx ? -1 : 1;
int flipy = (ctrl & 0x20), fy = flipy ? -1 : 1;
for(size_t i = 0; i <= length; i++) {
u8 *sprite = &uxn_ram[addr];
if (twobpp) {
PROF(ppu_2bpp(layer,
x + dy * i * fx,
y + dx * i * fy,
sprite,
color,
flipx, flipy), ppu_chr_cycles);
} else {
PROF(ppu_1bpp(layer,
x + dy * i * fx,
y + dx * i * fy,
sprite,
color,
flipx, flipy), ppu_icn_cycles);
}
addr += addr_incr;
}
if(move & 0x1) POKE2(dev + 0x8, x + dx * fx); /* auto x+8 */
if(move & 0x2) POKE2(dev + 0xa, y + dy * fy); /* auto y+8 */
if(move & 0x4) POKE2(dev + 0xc, addr); /* auto addr+length */
break;
}
}
}
void
deo_system(u8 *dev, u8 port) {
switch(port) {
case 0x2: {
// Rom bank switching.
u16 addr = PEEK2(dev + port);
if(uxn_ram[addr] == 0x01) {
u16 length = PEEK2(uxn_ram + addr + 1);
u16 a_page = PEEK2(uxn_ram + addr + 1 + 2);
u16 a_addr = PEEK2(uxn_ram + addr + 1 + 4);
u16 b_page = PEEK2(uxn_ram + addr + 1 + 6);
u16 b_addr = PEEK2(uxn_ram + addr + 1 + 8);
u8 *ram = uxn_ram + (b_page % RAM_PAGES) * 0x10000;
u8 *rom = uxn_rom + (a_page % RAM_PAGES) * 0x10000 - PAGE_PROGRAM;
for(size_t i = 0; i < length; i++) {
ram[b_addr + i] = rom[a_addr + i];
}
}
} break;
case 0x4: {
// TODO: Set wst_ptr, but is it the offset instead?
} break;
case 0x5: {
// TODO: Set rst_ptr, but is it the offset instead?
} break;
case 0x8:
case 0x9:
case 0xa:
case 0xb:
case 0xc:
case 0xd: {
// Setup RGB palette.
putcolors(&dev[0x8]);
} break;
case 0xe: {
// TODO: System inspect.
} break;
}
}
u16
dei_system(u8 *dev, u8 port) {
switch (port) {
case 0x0:
case 0x2:
case 0x6:
case 0x8:
case 0xa:
case 0xc: return PEEK2(dev + port);
case 0x4: {
// TODO: Return wst_ptr, but is it the offset instead?
} break;
case 0x5: {
// TODO: Return rst_ptr, but is it the offset instead?
} break;
}
return dev[port];
}
u16
dei_datetime(u8 *dev, u8 port) {
struct tm *t = gmtime(&seconds);
switch(port) {
case 0x0: return (t->tm_year + 1900);
case 0x1: return (t->tm_year + 1900) >> 8;
case 0x2: return t->tm_mon;
case 0x3: return t->tm_mday;
case 0x4: return t->tm_hour;
case 0x5: return t->tm_min;
case 0x6: return t->tm_sec;
case 0x7: return t->tm_wday;
case 0x8: return t->tm_yday;
case 0x9: return t->tm_yday >> 8;
case 0xa: return t->tm_isdst;
}
return dev[port];
}
u16
dei_audio(u8 *dev, u8 port) {
size_t idx = (dev - (device_data + 0x30)) / 16;
AudioChannel *c = &channels[idx];
switch(port) {
case 0x0:
case 0x8:
case 0xa:
case 0x2: // TODO: return the position
case 0xc: return PEEK2(dev + port);
// case 0x2: {
// POKE2(d + 0x2, c->pos);
// c->pos <<= 12; // fixed point.
// break;
// }
// case 0x4: return apu_get_vu(idx);
// TODO: return the current envelope loudness (0x00-0xff).
default: return dev[port];
}
return dev[port];
}
void
deo_audio(u8 *dev, u8 port) {
size_t idx = (dev - (device_data + 0x30)) / 16;
txt_printf("IDX: %d\n", idx);
AudioChannel *c = &channels[idx];
if (port == 0xf) {
u16 length = 0;
u16 adsr = 0;
u16 addr = 0;
u8 pitch = dev[0xf] & 0x7f;
adsr = PEEK2(dev + 0x8);
length = PEEK2(dev + 0xa);
addr = PEEK2(dev + 0xc);
u8 *data = &uxn_ram[addr];
u32 vol = MAX(dev[0xe] >> 4, dev[0xe] & 0xf) * 4 / 3;
bool loop = !(dev[0xf] & 0x80);
update_channel(c, data, length, pitch, adsr, vol, loop);
}
}
u16
dei_file(u8 *dev, u8 port) {
size_t idx = (dev - (device_data + 0xa0)) / 16;
UxnFile *c = &uxn_file[idx];
switch(port) {
case 0x0:
case 0x2:
case 0x4:
case 0x8:
case 0xa:
case 0xe: return PEEK2(dev + port);
case 0xc:
case 0xd: {
u16 res = file_read(c, &dev[port], 1);
POKE2(dev + 0x2, res);
return res;
}
}
return dev[port];
}
void
deo_file(u8 *dev, u8 port) {
size_t idx = (dev - (device_data + 0xa0)) / 16;
u16 a, b, res;
UxnFile *f = &uxn_file[idx];
switch(port) {
case 0x5: {
a = PEEK2(dev + 0x4);
b = PEEK2(dev + 0xa);
if(b > 0x10000 - a) {
b = 0x10000 - a;
}
res = file_stat(f, &uxn_ram[a], b);
POKE2(dev + 0x2, res);
} break;
case 0x6: {
// TODO: no file deletion for now
// res = file_delete();
// POKE2(dev + 0x2, res);
} break;
case 0x9: {
a = PEEK2(dev + 0x8);
res = file_init(f, &uxn_ram[a]);
POKE2(dev + 0x2, res);
} break;
case 0xd: {
a = PEEK2(dev + 0xc);
b = PEEK2(dev + 0xa);
if(b > 0x10000 - a) {
b = 0x10000 - a;
}
res = file_read(f, &uxn_ram[a], b);
POKE2(dev + 0x2, res);
} break;
case 0xf: {
a = PEEK2(dev + 0xe);
b = PEEK2(dev + 0xa);
if(b > 0x10000 - a) {
b = 0x10000 - a;
}
res = file_write(f, &uxn_ram[a], b, dev[0x7]);
POKE2(dev + 0x2, res);
} break;
}
}
void
deo_stub(u8 *dev, u8 port) {
(void)dev;
(void)port;
}
u16
dei_stub(u8 *dev, u8 port) {
if (port == 0) {
return PEEK2(dev);
}
return dev[port];
}
|
