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12 changes: 7 additions & 5 deletions
12
core/src/main/kotlin/br/tiagohm/nestalgia/core/BandaiMicrophone.kt
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58 changes: 58 additions & 0 deletions
58
core/src/main/kotlin/br/tiagohm/nestalgia/core/Bmc830425C4391T.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| package br.tiagohm.nestalgia.core | ||
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| // https://www.nesdev.org/wiki/NES_2.0_Mapper_320 | ||
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| class Bmc830425C4391T(console: Console) : Mapper(console) { | ||
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| override val prgPageSize = 0x4000 | ||
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| override val chrPageSize = 0x2000 | ||
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| @Volatile private var innerReg = 0 | ||
| @Volatile private var outerReg = 0 | ||
| @Volatile private var prgMode = false | ||
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| override fun initialize() { | ||
| selectChrPage(0, 0) | ||
| updateState() | ||
| } | ||
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| private fun updateState() { | ||
| if (prgMode) { | ||
| // UNROM mode | ||
| selectPrgPage(0, (innerReg and 0x07) or (outerReg shl 3)) | ||
| selectPrgPage(1, 0x07 or (outerReg shl 3)) | ||
| } else { | ||
| // UOROM mode | ||
| selectPrgPage(0, innerReg or (outerReg shl 3)) | ||
| selectPrgPage(1, 0x0F or (outerReg shl 3)) | ||
| } | ||
| } | ||
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| override fun writeRegister(addr: Int, value: Int) { | ||
| innerReg = value and 0x0F | ||
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| if (addr and 0xFFE0 == 0xF0E0) { | ||
| outerReg = addr and 0x0F | ||
| prgMode = (addr shr 4).bit0 | ||
| } | ||
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| updateState() | ||
| } | ||
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| override fun saveState(s: Snapshot) { | ||
| super.saveState(s) | ||
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| s.write("innerReg", innerReg) | ||
| s.write("outerReg", outerReg) | ||
| s.write("prgMode", prgMode) | ||
| } | ||
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| override fun restoreState(s: Snapshot) { | ||
| super.restoreState(s) | ||
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| innerReg = s.readInt("innerReg") | ||
| outerReg = s.readInt("outerReg") | ||
| prgMode = s.readBoolean("prgMode") | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| package br.tiagohm.nestalgia.core | ||
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| // https://wiki.nesdev.com/w/index.php/INES_Mapper_366 | ||
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| class BmcGn45(console: Console) : MMC3(console) { | ||
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| @Volatile private var selectedBlock = 0 | ||
| @Volatile private var wramEnabled = false | ||
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| override val registerStartAddress = 0x6000 | ||
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| override val registerEndAddress = 0xFFFF | ||
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| override fun reset(softReset: Boolean) { | ||
| super.reset(softReset) | ||
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| if (softReset) { | ||
| selectedBlock = 0 | ||
| wramEnabled = false | ||
| resetMMC3() | ||
| updateState() | ||
| } | ||
| } | ||
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| override fun selectChrPage(slot: Int, page: Int, memoryType: ChrMemoryType) { | ||
| super.selectChrPage(slot, (page and 0x7F) or (selectedBlock shl 3), memoryType) | ||
| } | ||
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| override fun selectPrgPage(slot: Int, page: Int, memoryType: PrgMemoryType) { | ||
| super.selectPrgPage(slot, (page and 0x0F) or selectedBlock, memoryType) | ||
| } | ||
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| override fun writeRegister(addr: Int, value: Int) { | ||
| if (addr < 0x7000) { | ||
| if (!wramEnabled) { | ||
| selectedBlock = addr and 0x30 | ||
| wramEnabled = addr.bit7 | ||
| updateState() | ||
| } else { | ||
| writePrgRam(addr, value) | ||
| } | ||
| } else if (addr < 0x8000) { | ||
| if (!wramEnabled) { | ||
| selectedBlock = value and 0x30 | ||
| updateState() | ||
| } else { | ||
| writePrgRam(addr, value) | ||
| } | ||
| } else { | ||
| super.writeRegister(addr, value) | ||
| } | ||
| } | ||
| } |
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