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TOD latching

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This commit is contained in:
Irmen de Jong 2019-10-05 22:22:06 +02:00
parent dd3bfa49e9
commit 3f78c13b80
1 changed files with 18 additions and 5 deletions
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23
src/main/kotlin/razorvine/c64emu/Cia.kt
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@ -24,6 +24,8 @@ class Cia(val number: Int, startAddress: Address, endAddress: Address) : MemMapp
var minutes = 0
var seconds = 0
var tenths = 0
private var latchedTime = 0L
private var latched = false
fun start() {
if (!running) {
@ -32,17 +34,25 @@ class Cia(val number: Int, startAddress: Address, endAddress: Address) : MemMapp
userStartTime = hours * 3600 + minutes * 60 + seconds + tenths / 10.0
running = true
}
latch(false)
}
fun stop() {
running = false
}
fun latch(latched: Boolean) {
this.latched = latched
update()
}
fun update() {
val currentTime = System.currentTimeMillis()
if (running && updatedAt != currentTime) {
updatedAt = currentTime
var elapsedSeconds = (currentTime.toDouble() - startedAt) / 1000.0 + userStartTime
if(!running || latched)
return
latchedTime = System.currentTimeMillis()
if (updatedAt != latchedTime) {
updatedAt = latchedTime
var elapsedSeconds = (latchedTime.toDouble() - startedAt) / 1000.0 + userStartTime
hours = (elapsedSeconds / 3600).toInt()
elapsedSeconds -= hours * 3600
minutes = (elapsedSeconds / 60).toInt()
@ -241,7 +251,10 @@ class Cia(val number: Int, startAddress: Address, endAddress: Address) : MemMapp
}
0x09 -> toBCD(tod.seconds)
0x0a -> toBCD(tod.minutes)
0x0b -> toBCD(tod.hours)
0x0b -> {
tod.latch(true)
toBCD(tod.hours)
}
else -> ramBuffer[register]
}
}