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ram load address

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This commit is contained in:
Irmen de Jong 2019-09-16 01:21:55 +02:00
parent d0dfb24172
commit da722cf63a
1 changed files with 10 additions and 6 deletions
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16
src/main/kotlin/razorvine/ksim65/components/Ram.kt
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@ -28,14 +28,14 @@ class Ram(startAddress: Address, endAddress: Address) : MemoryComponent(startAdd
}
/**
* load a c64-style prg program at the given address,
* this file has the load address as the first two bytes.
* Load a c64-style prg program. This file type has the load address as the first two bytes.
*/
fun loadPrg(filename: String) {
val bytes = File(filename).readBytes()
val address = (bytes[0].toInt() or (bytes[1].toInt() shl 8)) and 65535
val loadAddress = (bytes[0].toInt() or (bytes[1].toInt() shl 8)) and 65535
val baseAddress = loadAddress - startAddress
bytes.drop(2).forEachIndexed { index, byte ->
memory[address + index] =
memory[baseAddress + index] =
if (byte >= 0)
byte.toShort()
else
@ -57,11 +57,15 @@ class Ram(startAddress: Address, endAddress: Address) : MemoryComponent(startAdd
}
fun load(data: Array<UByte>, address: Address) =
data.forEachIndexed { index, byte -> memory[address + index] = byte }
data.forEachIndexed { index, byte ->
val baseAddress = address - startAddress
memory[baseAddress + index] = byte
}
fun load(data: ByteArray, address: Address) =
data.forEachIndexed { index, byte ->
memory[address + index] =
val baseAddress = address - startAddress
memory[baseAddress + index] =
if (byte >= 0)
byte.toShort()
else