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add memory functions to moremem.c for debugger integration

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This commit is contained in:
Dagen Brock 2016-10-19 12:41:38 -05:00
parent 2beff689d0
commit 8fd37324a8
1 changed files with 35 additions and 0 deletions
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35
src/moremem.c
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@ -1179,6 +1179,41 @@ show_bankptrs(int bnk)
}
}
// function to get the pointer to memory where a gs page is located - db
unsigned char * get_page_ptr_rd(int addr) {
Pg_info rd;
byte *ptr_rd;
int bank = ( addr & 0xFF0000 ) >> 16; // unnecessary conversion that we throw away below w/ "*0x100"
int page = ( addr & 0x00FF00 ) >> 8;
rd = GET_PAGE_INFO_RD(bank*0x100 + page);
ptr_rd = (byte *)rd;
//printf("ADDR %06x at pageptr %p\n",addr, ptr_rd); // seems to be correct.
/* code */
return rd;
}
// function to get a byte from a 24bit address - db
int get_byte_at_address(int addr)
{
unsigned char *page_ptr_rd = get_page_ptr_rd(addr);
int offset = addr & 0xff;
int mem_byte = page_ptr_rd[offset] & 0xff;
//printf("0x%06X = $%02X \t(dec) %d\n", addr, (int) mem_byte, (int) mem_byte);
return (int) mem_byte;
}
// function to set a byte from a 24bit address - db
void set_byte_at_address(int addr, int value)
{
unsigned char *page_ptr_rd = get_page_ptr_rd(addr);
int offset = addr & 0xff;
page_ptr_rd[offset] = value;
}
void
show_addr(byte *ptr)
{