46 lines
999 B
Go
46 lines
999 B
Go
package gb
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import (
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"fmt"
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"os"
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)
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var SerialData [2]byte
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var InterruptFlags byte
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func IORead(address uint16) byte {
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if address == 0xFF01 {
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return SerialData[0]
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} else if address == 0xFF02 {
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return SerialData[1]
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} else if (address >= 0xFF04) && (address <= 0xFF07) {
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return timer.Read(address)
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} else if address == 0xFF0F {
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return InterruptFlags
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} else if (address >= 0xFF10) && (address <= 0xFF3F) {
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// Ignore sound
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return 0
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} else {
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fmt.Printf("Reading from IO: invalid address %X\n", address)
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os.Exit(1)
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}
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return 0
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}
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func IOWrite(address uint16, value byte) {
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if address == 0xFF01 {
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SerialData[0] = value
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} else if address == 0xFF02 {
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SerialData[1] = value
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} else if (address >= 0xFF04) && (address <= 0xFF07) {
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timer.Write(address, value)
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} else if address == 0xFF0F {
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InterruptFlags = value
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} else if (address >= 0xFF10) && (address <= 0xFF3F) {
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// Ignore sound
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} else {
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fmt.Printf("Writing to IO: invalid address %X\n", address)
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os.Exit(1)
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}
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}
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