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comparison src/cpu.c @ 20:a9364f5ee81a

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Fix timing of port IO
author Michael Pavone <pavone@retrodev.com>
date Tue, 29 Mar 2016 19:57:34 -0700
parents d8ae30286d17
children fb14515266f4
comparison
equal deleted inserted replaced
19:04fc17376999 20:a9364f5ee81a
98 } 98 }
99 } 99 }
100 100
101 uint16_t cpu_read_port(cpu *context, uint8_t port) 101 uint16_t cpu_read_port(cpu *context, uint8_t port)
102 { 102 {
103 context->cycles += context->clock_inc;
103 port &= 0xF; 104 port &= 0xF;
104 if (context->port_handlers[port].read) { 105 if (context->port_handlers[port].read) {
105 return context->port_handlers[port].read(context, port); 106 return context->port_handlers[port].read(context, port);
106 } 107 }
107 return 0xFFFF; 108 return 0xFFFF;
108 } 109 }
109 110
110 void cpu_write_port(cpu *context, uint8_t port, uint16_t value) 111 void cpu_write_port(cpu *context, uint8_t port, uint16_t value)
111 { 112 {
113 context->cycles += context->clock_inc;
112 port &= 0xF; 114 port &= 0xF;
113 if (context->port_handlers[port].write) { 115 if (context->port_handlers[port].write) {
114 context->port_handlers[port].write(context, port, value); 116 context->port_handlers[port].write(context, port, value);
115 } 117 }
116 } 118 }