- memory_write8(INT_MEM_ID, _P0_, 0xFF);
- memory_write8(INT_MEM_ID, _P1_, 0xFF);
- memory_write8(INT_MEM_ID, _P2_, 0xFF);
- memory_write8(INT_MEM_ID, _P3_, 0xFF);
- memory_write8(INT_MEM_ID, _SP_, 0x07);
+ /* The default value of SP (after system reset) is 07 */
+ memory_sfr_write8(_SP_, 0x07);