54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
#include "dump.h"
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/* Desc:Dump cart memory into buffer's data array
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* Pre: buffer elements must be updated to designate how/where to dump
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* buffer's cur_byte must be cleared or set to where to start dumping
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* Post:page dumped from cart memory to buffer.
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* Rtn: SUCCESS or ERROR# depending on if there were errors.
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*/
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uint8_t dump_page( buffer *buff ) {
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uint8_t addrH = buff->page_num; //A15:8 while accessing page
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//warn uint8_t addrX; //A23:16 while accessing page
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//TODO use mapper to set mapper controlled address bits
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//use mem_type to set addrH/X as needed for dump loop
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//also use to get read function pointer
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switch ( buff->mem_type ) {
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case PRGROM:
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addrH |= 0x80; //$8000
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//uint8_t nes_cpu_page_rd( uint8_t *data, uint8_t addrH, uint8_t first, uint8_t last, uint8_t poll )
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buff->cur_byte = nes_cpu_page_rd_poll( buff->data, addrH, buff->id,
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//id contains MSb of page when <256B buffer
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buff->last_idx, ~FALSE );
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break;
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case CHRROM: //$0000
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//buff->cur_byte = nes_ppu_page_rd( buff->data, addrH, buff->id,
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// (buff->last_idx | buff->id) );
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break;
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case PRGRAM:
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addrH |= 0x60; //$6000
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buff->cur_byte = nes_cpu_page_rd_poll( buff->data, addrH, buff->id,
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buff->last_idx, ~FALSE );
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break;
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case SNESROM:
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case SNESRAM:
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//warn addrX = ((buff->page_num)>>8);
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break;
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default:
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return ERR_BUFF_UNSUP_MEM_TYPE;
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}
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//lets start just reading first page of PRG-ROM then get fancy
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// while (buff->cur_byte < buff->last_idx) {
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//
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// //might be faster to put some of these in new pointers, but not sure..
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// buff->data[buff->cur_byte] = nes_cpu_rd( addrH, buff->cur_byte );
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// buff->cur_byte++;
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// }
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return SUCCESS;
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}
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