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- /*****
- * CPU<>APU communication ports
- *****/
- uint8 apu_port[4];
- uint8 port_read(uint8 port) { return apu_port[port & 3]; }
- void port_write(uint8 port, uint8 data) { apu_port[port & 3] = data; }
- /*****
- * core CPU bus functions
- *****/
- void op_io();
- uint8 op_read(uint32 addr);
- void op_write(uint32 addr, uint8 data);
- /*****
- * helper memory addressing functions used by CPU core
- *****/
- uint8 op_readpc ();
- uint8 op_readstack ();
- uint8 op_readstackn();
- uint8 op_readaddr (uint32 addr);
- uint8 op_readlong (uint32 addr);
- uint8 op_readdbr (uint32 addr);
- uint8 op_readpbr (uint32 addr);
- uint8 op_readdp (uint32 addr);
- uint8 op_readsp (uint32 addr);
- void op_writestack (uint8 data);
- void op_writestackn(uint8 data);
- void op_writeaddr (uint32 addr, uint8 data);
- void op_writelong (uint32 addr, uint8 data);
- void op_writedbr (uint32 addr, uint8 data);
- void op_writepbr (uint32 addr, uint8 data);
- void op_writedp (uint32 addr, uint8 data);
- void op_writesp (uint32 addr, uint8 data);
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