5 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
6 // Cleanups by James L. Hammons
13 static uint16 eeprom_ram[64];
15 void eeprom_set_di(uint32 state);
16 void eeprom_set_cs(uint32 state);
17 uint32 eeprom_get_do(void);
19 #define EE_STATE_START 1
20 #define EE_STATE_OP_A 2
21 #define EE_STATE_OP_B 3
26 #define EE_STATE_0_0 8
27 #define EE_READ_ADDRESS 9
28 #define EE_STATE_0_0_0 10
29 #define EE_STATE_0_0_1 11
30 #define EE_STATE_0_0_2 12
31 #define EE_STATE_0_0_3 13
32 #define EE_STATE_0_0_1_0 14
33 #define EE_READ_DATA 15
34 #define EE_STATE_BUSY 16
35 #define EE_STATE_1_0 17
36 #define EE_STATE_1_1 18
37 #define EE_STATE_2_0 19
38 #define EE_STATE_3_0 20
40 uint16 jerry_ee_state = EE_STATE_START;
41 uint16 jerry_ee_op = 0;
42 uint16 jerry_ee_rstate = 0;
43 uint16 jerry_ee_address_data = 0;
44 uint16 jerry_ee_address_cnt = 6;
45 uint16 jerry_ee_data = 0;
46 uint16 jerry_ee_data_cnt = 16;
47 uint16 jerry_writes_enabled = 0;
48 uint16 jerry_ee_direct_jump = 0;
50 extern char * jaguar_boot_dir;
53 void eeprom_init(void)
55 static char eeprom_filename[1024];
57 sprintf(eeprom_filename, "%s\\%s%08X.eep", jaguar_boot_dir, jaguar_eeproms_path, (unsigned int)jaguar_mainRom_crc32);
58 jerry_ee_fp = fopen(eeprom_filename, "rb");
61 fread(eeprom_ram, 1, 128, jerry_ee_fp);
63 fprintf(log_get(), "eeprom: loaded from %s\n", eeprom_filename);
64 jerry_ee_fp = fopen(eeprom_filename, "wrb");
68 fprintf(log_get(), "eeprom: creating %s\n", eeprom_filename);
69 jerry_ee_fp = fopen(eeprom_filename, "wb");
70 if (jerry_ee_fp == NULL)
71 fprintf(log_get(), "EEPROM: Could not open/create %s\n", eeprom_filename);
75 void eeprom_reset(void)
77 if (jerry_ee_fp == NULL)
78 memset(eeprom_ram, 0xFF, 64 * sizeof(uint16));
81 void eeprom_done(void)
85 fwrite(eeprom_ram, 1, 128, jerry_ee_fp);
89 fprintf(log_get(),"eeprom: not saved\n");
92 void eeprom_byte_write(uint32 offset, uint8 data)
99 eeprom_set_di(data & 0x01);
104 // default: fprintf(log_get(),"eeprom: unmapped 0x%.8x\n",offset); break;
108 void eeprom_word_write(uint32 offset, uint16 data)
110 eeprom_byte_write(offset+0, (data >> 8) & 0xFF);
111 eeprom_byte_write(offset+1, data & 0xFF);
114 uint8 eeprom_byte_read(uint32 offset)
119 return eeprom_get_do();
125 // default: fprintf(log_get(),"eeprom: unmapped 0x%.8x\n",offset); break;
131 uint16 eeprom_word_read(uint32 offset)
133 return ((uint16)eeprom_byte_read(offset+0) << 8) | eeprom_byte_read(offset+1);
136 void eeprom_set_di(uint32 data)
138 // fprintf(log_get(),"eeprom: di=%i\n",data);
139 // fprintf(log_get(),"eeprom: state %i\n",jerry_ee_state);
140 switch (jerry_ee_state)
143 jerry_ee_state = EE_STATE_OP_A;
146 jerry_ee_op = (data << 1);
147 jerry_ee_state = EE_STATE_OP_B;
151 jerry_ee_direct_jump = 0;
152 // fprintf(log_get(),"eeprom: opcode %i\n",jerry_ee_op);
155 case 0: jerry_ee_state = EE_STATE_0; break;
156 case 1: jerry_ee_state = EE_STATE_1; break;
157 case 2: jerry_ee_state = EE_STATE_2; break;
158 case 3: jerry_ee_state = EE_STATE_3; break;
163 jerry_ee_rstate = EE_STATE_0_0;
164 jerry_ee_state = EE_READ_ADDRESS;
165 jerry_ee_direct_jump = 1;
166 jerry_ee_address_cnt = 6;
167 jerry_ee_address_data = 0;
170 switch ((jerry_ee_address_data >> 4) & 0x03)
172 case 0: jerry_ee_state=EE_STATE_0_0_0; break;
173 case 1: jerry_ee_state=EE_STATE_0_0_1; break;
174 case 2: jerry_ee_state=EE_STATE_0_0_2; break;
175 case 3: jerry_ee_state=EE_STATE_0_0_3; break;
181 // fprintf(log_get(),"eeprom: read only\n");
182 jerry_writes_enabled = 0;
183 jerry_ee_state = EE_STATE_START;
187 jerry_ee_rstate = EE_STATE_0_0_1_0;
188 jerry_ee_state = EE_READ_DATA;
189 jerry_ee_data_cnt = 16;
191 jerry_ee_direct_jump = 1;
193 case EE_STATE_0_0_1_0:
194 // fprintf(log_get(),"eeprom: filling eeprom with 0x%.4x\n",data);
195 if (jerry_writes_enabled)
196 for(int i=0; i<64; i++)
197 eeprom_ram[i] = jerry_ee_data;
199 // fprintf(log_get(),"eeprom: not writing because read only\n");
200 jerry_ee_state = EE_STATE_BUSY;
204 //fprintf(log_get(),"eeprom: erasing eeprom\n");
205 if (jerry_writes_enabled)
206 for(int i=0; i<64; i++)
207 eeprom_ram[i] = 0xFFFF;
209 jerry_ee_state=EE_STATE_BUSY;
213 //fprintf(log_get(),"eeprom: read/write\n");
214 jerry_writes_enabled = 1;
215 jerry_ee_state = EE_STATE_START;
218 jerry_ee_rstate = EE_STATE_1_0;
219 jerry_ee_state = EE_READ_ADDRESS;
220 jerry_ee_address_cnt = 6;
221 jerry_ee_address_data = 0;
222 jerry_ee_direct_jump = 1;
225 jerry_ee_rstate = EE_STATE_1_1;
226 jerry_ee_state = EE_READ_DATA;
227 jerry_ee_data_cnt = 16;
229 jerry_ee_direct_jump = 1;
232 //fprintf(log_get(),"eeprom: writing 0x%.4x at 0x%.2x\n",jerry_ee_data,jerry_ee_address_data);
233 if (jerry_writes_enabled)
234 eeprom_ram[jerry_ee_address_data] = jerry_ee_data;
235 jerry_ee_state = EE_STATE_BUSY;
238 jerry_ee_rstate = EE_STATE_2_0;
239 jerry_ee_state = EE_READ_ADDRESS;
240 jerry_ee_address_cnt = 6;
241 jerry_ee_address_data = 0;
242 jerry_ee_data_cnt = 16;
246 jerry_ee_rstate = EE_STATE_3_0;
247 jerry_ee_state = EE_READ_ADDRESS;
248 jerry_ee_address_cnt = 6;
249 jerry_ee_address_data = 0;
250 jerry_ee_direct_jump = 1;
253 //fprintf(log_get(),"eeprom: erasing 0x%.2x\n",jerry_ee_address_data);
254 if (jerry_writes_enabled)
255 eeprom_ram[jerry_ee_address_data] = 0xFFFF;
256 jerry_ee_state = EE_STATE_BUSY;
259 //fprintf(log_get(),"eeprom:\t\t\t%i bit %i\n",data,jerry_ee_data_cnt-1);
261 jerry_ee_data |= data;
263 if (!jerry_ee_data_cnt)
265 jerry_ee_state = jerry_ee_rstate;
266 if (jerry_ee_direct_jump)
270 case EE_READ_ADDRESS:
271 jerry_ee_address_data <<= 1;
272 jerry_ee_address_data |= data;
273 jerry_ee_address_cnt--;
274 // fprintf(log_get(),"eeprom:\t%i bits remaining\n",jerry_ee_address_cnt);
275 if (!jerry_ee_address_cnt)
277 jerry_ee_state = jerry_ee_rstate;
278 //fprintf(log_get(),"eeprom:\t\tread address 0x%.2x\n",jerry_ee_address_data);
279 if (jerry_ee_direct_jump)
284 jerry_ee_state = EE_STATE_OP_A;
288 void eeprom_set_cs(uint32 state)
290 // fprintf(log_get(),"eeprom: cs=%i\n",state);
291 jerry_ee_state = EE_STATE_START;
294 jerry_ee_address_data = 0;
295 jerry_ee_address_cnt = 6;
297 jerry_ee_data_cnt = 16;
298 jerry_writes_enabled = 1;
301 uint32 eeprom_get_do(void)
305 switch (jerry_ee_state)
311 jerry_ee_state = EE_STATE_START;
316 data = (eeprom_ram[jerry_ee_address_data] & (1 << jerry_ee_data_cnt)) >> jerry_ee_data_cnt;
317 if (!jerry_ee_data_cnt)
319 //fprintf(log_get(),"eeprom: read 0x%.4x at 0x%.2x cpu %i pc=0x%.8x\n",eeprom_ram[jerry_ee_address_data],jerry_ee_address_data,jaguar_cpu_in_exec,s68000readPC());
320 jerry_ee_state = EE_STATE_START;
325 // fprintf(log_get(),"eeprom: do=%i\n",data);