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CPU_6502_INY.go
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CPU_6502_INY.go
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package CPU_6502
import "fmt"
// INY Increment Index Y by One
//
// Y + 1 -> Y N Z C I D V
// + + - - - -
//
// addressing assembler opc bytes cyles
// --------------------------------------------
// implied INY C8 1 2
func opc_INY(bytes uint16, opc_cycles byte) {
// Update Global Opc_cycles value
Opc_cycles = opc_cycles
// Print internal opcode cycle
debugInternalOpcCycle(opc_cycles)
// Just increment the Opcode cycle Counter
if Opc_cycle_count < opc_cycles {
Opc_cycle_count++
// After spending the cycles needed, execute the opcode
} else {
Y++
// Print Opcode Debug Message
opc_INY_DebugMsg(bytes)
flags_Z(Y)
flags_N(Y)
// Increment PC
PC += bytes
// Reset Internal Opcode Cycle counters
resetIntOpcCycleCounters()
}
}
func opc_INY_DebugMsg(bytes uint16) {
if Debug {
opc_string := debug_decode_opc(bytes)
dbg_show_message = fmt.Sprintf("\n\tOpcode %s [Mode: Implied]\tINY Increment Index Y by One (0x%02X)\n", opc_string, Y)
fmt.Println(dbg_show_message)
}
}