Apple-1-Tools/FruitMachine-Swift
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adding read and write override handlers i guess?

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This commit is contained in:
Luigi Thirty 2017-07-26 00:44:53 -04:00
parent fb950c6cec
commit 2903eac409
7 changed files with 97 additions and 5 deletions
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22
FruitMachine.xcodeproj/project.pbxproj
View File

@ -17,6 +17,9 @@
2AD458E31F20661300F05121 /* CPUInstructions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2AD458E21F20661300F05121 /* CPUInstructions.swift */; };
2AD458E51F2070DF00F05121 /* Opcodes.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2AD458E41F2070DF00F05121 /* Opcodes.swift */; };
2AD6D5841F26E6BF008F3CF5 /* DebuggerCommands.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2AD6D5831F26E6BF008F3CF5 /* DebuggerCommands.swift */; };
2AE42E081F2850F400C4900E /* ReadOverride.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2AE42E071F2850F400C4900E /* ReadOverride.swift */; };
2AE42E0A1F28521E00C4900E /* WriteOverride.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2AE42E091F28521E00C4900E /* WriteOverride.swift */; };
2AE42E0C1F28522D00C4900E /* MemoryOverride.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2AE42E0B1F28522D00C4900E /* MemoryOverride.swift */; };
2AE5BA041F23DE4400FAA343 /* Disassembly.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2AE5BA031F23DE4400FAA343 /* Disassembly.swift */; };
2AE5BA061F2469EB00FAA343 /* AddressConversions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2AE5BA051F2469EB00FAA343 /* AddressConversions.swift */; };
/* End PBXBuildFile section */
@ -35,6 +38,9 @@
2AD458E21F20661300F05121 /* CPUInstructions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CPUInstructions.swift; sourceTree = "<group>"; };
2AD458E41F2070DF00F05121 /* Opcodes.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Opcodes.swift; sourceTree = "<group>"; };
2AD6D5831F26E6BF008F3CF5 /* DebuggerCommands.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DebuggerCommands.swift; sourceTree = "<group>"; };
2AE42E071F2850F400C4900E /* ReadOverride.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ReadOverride.swift; sourceTree = "<group>"; };
2AE42E091F28521E00C4900E /* WriteOverride.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WriteOverride.swift; sourceTree = "<group>"; };
2AE42E0B1F28522D00C4900E /* MemoryOverride.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MemoryOverride.swift; sourceTree = "<group>"; };
2AE5BA031F23DE4400FAA343 /* Disassembly.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Disassembly.swift; sourceTree = "<group>"; };
2AE5BA051F2469EB00FAA343 /* AddressConversions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AddressConversions.swift; sourceTree = "<group>"; };
/* End PBXFileReference section */
@ -84,17 +90,28 @@
2AD458DD1F205F0D00F05121 /* M6502 */ = {
isa = PBXGroup;
children = (
2AE42E061F2850E100C4900E /* Memory */,
2AD458DE1F205F4500F05121 /* CPU.swift */,
2AD458E21F20661300F05121 /* CPUInstructions.swift */,
2AE5BA031F23DE4400FAA343 /* Disassembly.swift */,
2AD458E41F2070DF00F05121 /* Opcodes.swift */,
2AE5BA051F2469EB00FAA343 /* AddressConversions.swift */,
2AD458E01F2064CB00F05121 /* MemoryInterface.swift */,
2A22EBFA1F21A7A700A36A61 /* IntegerExtensions.swift */,
);
path = M6502;
sourceTree = "<group>";
};
2AE42E061F2850E100C4900E /* Memory */ = {
isa = PBXGroup;
children = (
2AD458E01F2064CB00F05121 /* MemoryInterface.swift */,
2AE42E071F2850F400C4900E /* ReadOverride.swift */,
2AE42E091F28521E00C4900E /* WriteOverride.swift */,
2AE42E0B1F28522D00C4900E /* MemoryOverride.swift */,
);
path = Memory;
sourceTree = "<group>";
};
/* End PBXGroup section */
/* Begin PBXNativeTarget section */
@ -168,11 +185,14 @@
2AD458E31F20661300F05121 /* CPUInstructions.swift in Sources */,
2AD458D01F205EB700F05121 /* DebuggerViewController.swift in Sources */,
2AD458CE1F205EB700F05121 /* AppDelegate.swift in Sources */,
2AE42E0C1F28522D00C4900E /* MemoryOverride.swift in Sources */,
2A22EBFB1F21A7A700A36A61 /* IntegerExtensions.swift in Sources */,
2AD6D5841F26E6BF008F3CF5 /* DebuggerCommands.swift in Sources */,
2AE5BA041F23DE4400FAA343 /* Disassembly.swift in Sources */,
2AD458E51F2070DF00F05121 /* Opcodes.swift in Sources */,
2AE42E081F2850F400C4900E /* ReadOverride.swift in Sources */,
2AE5BA061F2469EB00FAA343 /* AddressConversions.swift in Sources */,
2AE42E0A1F28521E00C4900E /* WriteOverride.swift in Sources */,
2AD458E11F2064CB00F05121 /* MemoryInterface.swift in Sources */,
2AD458DF1F205F4500F05121 /* CPU.swift in Sources */,
);

4
FruitMachine/DebuggerViewController.swift
View File

@ -46,7 +46,7 @@ class DebuggerViewController: NSViewController {
text_CPU_SR.stringValue = String(format:"%02X", cpuInstance.stack_pointer)
text_CPU_Flags.stringValue = String(cpuInstance.status_register.asString())
disassembly = cpuInstance.disassemble(fromAddress: 0, length: 40000)
disassembly = cpuInstance.disassemble(fromAddress: 0, length: 65535)
highlightCurrentInstruction()
}
@ -60,7 +60,7 @@ class DebuggerViewController: NSViewController {
cpuInstance.performReset()
cpuInstance.program_counter = 0x400 //entry point for the test program
updateCPUStatusFields()
disassembly = cpuInstance.disassemble(fromAddress: 0, length: 65000)
disassembly = cpuInstance.disassemble(fromAddress: 0, length: 65535)
debuggerTableView.reloadData()
cpuInstance.breakpoints.append(0x34E8) //failing at $34FD SBC test

3
FruitMachine/M6502/CPU.swift
View File

@ -156,8 +156,7 @@ class CPU: NSObject {
//Branches incur a 1-cycle penalty if taken plus the page boundary penalty if necessary.
branch_was_taken = false
breakpoints = [UInt16]()
breakpoints = [UInt16]()
}
func getOperandByte() -> UInt8 {

18
FruitMachine/M6502/MemoryInterface.swift → FruitMachine/M6502/Memory/MemoryInterface.swift
View File

@ -12,15 +12,33 @@ class MemoryInterface: NSObject {
fileprivate var memory: [UInt8]
var read_overrides: [ReadOverride]
var write_overrides: [WriteOverride]
override init() {
memory = [UInt8](repeating: 0x00, count: 65536)
read_overrides = [ReadOverride]()
write_overrides = [WriteOverride]()
}
func readByte(offset: UInt16) -> UInt8 {
for override in read_overrides {
if case override.rangeStart ... override.rangeEnd = offset {
override.action(CPU.sharedInstance, nil)
}
}
//No match.
return memory[Int(offset)]
}
func writeByte(offset: UInt16, value: UInt8) {
for override in read_overrides {
if case override.rangeStart ... override.rangeEnd = offset {
override.action(CPU.sharedInstance, value)
}
}
memory[Int(offset)] = value
}

23
FruitMachine/M6502/Memory/MemoryOverride.swift Normal file
View File

@ -0,0 +1,23 @@
//
// MemoryOverride.swift
// FruitMachine
//
// Created by Christopher Rohl on 7/26/17.
// Copyright © 2017 Christopher Rohl. All rights reserved.
//
import Cocoa
class MemoryOverride: NSObject {
let rangeStart: UInt16
let rangeEnd: UInt16
let action: (CPU, UInt8?) -> Void
init(start: UInt16, end: UInt16, action: @escaping (CPU, UInt8?) -> Void) {
rangeStart = start
rangeEnd = end
self.action = action
}
}

16
FruitMachine/M6502/Memory/ReadOverride.swift Normal file
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@ -0,0 +1,16 @@
//
// ReadOverride.swift
// FruitMachine
//
// Created by Christopher Rohl on 7/26/17.
// Copyright © 2017 Christopher Rohl. All rights reserved.
//
import Cocoa
/* A ReadOverride is special behavior that occurs when a memory address is read.
Memory-mapped registers, peripherals, etc. */
class ReadOverride: MemoryOverride {
}

16
FruitMachine/M6502/Memory/WriteOverride.swift Normal file
View File

@ -0,0 +1,16 @@
//
// WriteOverride.swift
// FruitMachine
//
// Created by Christopher Rohl on 7/26/17.
// Copyright © 2017 Christopher Rohl. All rights reserved.
//
import Cocoa
/* A ReadOverride is special behavior that occurs when a memory address is written.
Memory-mapped registers, peripherals, etc. */
class WriteOverride: MemoryOverride {
}