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comparison backend.c @ 1771:e59045f781ce mame_interp

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Fix a couple issues in manual memory map read/write functions
author Michael Pavone <pavone@retrodev.com>
date Tue, 12 Mar 2019 21:57:35 -0700
parents 8fe162bdb038
children 374a5ae694e8
comparison
equal deleted inserted replaced
1770:a81db00e171a 1771:e59045f781ce
160 { 160 {
161 memmap_chunk const *chunk = find_map_chunk(address, opts, 0, NULL); 161 memmap_chunk const *chunk = find_map_chunk(address, opts, 0, NULL);
162 if (!chunk) { 162 if (!chunk) {
163 return; 163 return;
164 } 164 }
165 uint32_t offset = (address - chunk->start) & chunk->mask; 165 uint32_t offset = address & chunk->mask;
166 if (chunk->flags & MMAP_WRITE) { 166 if (chunk->flags & MMAP_WRITE) {
167 uint8_t *base; 167 uint8_t *base;
168 if (chunk->flags & MMAP_PTR_IDX) { 168 if (chunk->flags & MMAP_PTR_IDX) {
169 base = mem_pointers[chunk->ptr_index]; 169 base = mem_pointers[chunk->ptr_index];
170 } else { 170 } else {
210 } 210 }
211 } else if (chunk->flags & MMAP_ONLY_ODD) { 211 } else if (chunk->flags & MMAP_ONLY_ODD) {
212 return 0xFF; 212 return 0xFF;
213 } 213 }
214 offset /= 2; 214 offset /= 2;
215 } else if(opts->byte_swap) {
216 offset ^= 1;
215 } 217 }
216 return base[offset]; 218 return base[offset];
217 } 219 }
218 } 220 }
219 if ((!(chunk->flags & MMAP_READ) || (chunk->flags & MMAP_FUNC_NULL)) && chunk->read_8) { 221 if ((!(chunk->flags & MMAP_READ) || (chunk->flags & MMAP_FUNC_NULL)) && chunk->read_8) {
244 } 246 }
245 } else if (chunk->flags & MMAP_ONLY_ODD) { 247 } else if (chunk->flags & MMAP_ONLY_ODD) {
246 return; 248 return;
247 } 249 }
248 offset /= 2; 250 offset /= 2;
251 } else if(opts->byte_swap) {
252 offset ^= 1;
249 } 253 }
250 base[offset] = value; 254 base[offset] = value;
251 } 255 }
252 } 256 }
253 if ((!(chunk->flags & MMAP_WRITE) || (chunk->flags & MMAP_FUNC_NULL)) && chunk->write_8) { 257 if ((!(chunk->flags & MMAP_WRITE) || (chunk->flags & MMAP_FUNC_NULL)) && chunk->write_8) {