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comparison blastem.c @ 918:2e465934bddc

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Allow DMA from cartridge ROM above the 4MB mark. Should probably use get_native_pointer for everyting, but want to check the performance implications
author Michael Pavone <pavone@retrodev.com>
date Wed, 30 Dec 2015 19:00:03 -0800
parents a5a51465f8b0
children 8bd82aead087
comparison
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917:f057975212e9 918:2e465934bddc
132 //addresses here are word addresses (i.e. bit 0 corresponds to A1), so no need to do div by 2 132 //addresses here are word addresses (i.e. bit 0 corresponds to A1), so no need to do div by 2
133 if (address < 0x200000) { 133 if (address < 0x200000) {
134 return cart[address]; 134 return cart[address];
135 } else if(address >= 0x700000) { 135 } else if(address >= 0x700000) {
136 return ram[address & 0x7FFF]; 136 return ram[address & 0x7FFF];
137 } else {
138 uint16_t *ptr = get_native_pointer(address*2, (void **)genesis->m68k->mem_pointers, &genesis->m68k->options->gen);
139 if (ptr) {
140 return *ptr;
141 }
137 } 142 }
138 //TODO: Figure out what happens when you try to DMA from weird adresses like IO or banked Z80 area 143 //TODO: Figure out what happens when you try to DMA from weird adresses like IO or banked Z80 area
139 return 0; 144 return 0;
140 } 145 }
141 146