Miroirs/waterfoul
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move loading cartridge from MMU initialize to attr_accessor

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Colby 2016-07-17 22:06:15 +10:00
parent 196235bce3
commit 4fa99873e4
2 changed files with 20 additions and 12 deletions
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3
lib/waterfoul/emulator.rb
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@ -7,7 +7,8 @@ module Waterfoul
# initialize emulated CPU, GPU & Sound components # initialize emulated CPU, GPU & Sound components
cartridge = Cartridge.new rom cartridge = Cartridge.new rom
# initialize emulated memory management unit # initialize emulated memory management unit
$mmu = MMU.new cartridge $mmu = MMU.new
$mmu.cartridge = cartridge
cpu = CPU.new cpu = CPU.new
@cpu = options.has_key?('skip_boot') ? SkipBoot.set_state(cpu) : cpu @cpu = options.has_key?('skip_boot') ? SkipBoot.set_state(cpu) : cpu
@gpu = GPU.new @gpu = GPU.new

29
lib/waterfoul/mmu.rb
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@ -18,10 +18,11 @@ module Waterfoul
DIV_MEM_LOC = 0xFF04 DIV_MEM_LOC = 0xFF04
attr_reader :memory attr_reader :memory
attr_accessor :cartridge
# Set the initial state the memory management unit when program starts # Set the initial state the memory management unit when program starts
def initialize(cartridge) def initialize
@cartridge = cartridge @cartridge = []
# flag to indicate if the boot rom is mapped to memory # flag to indicate if the boot rom is mapped to memory
@map_boot_rom = true @map_boot_rom = true
# storage for usable memory (zero filled) # storage for usable memory (zero filled)
@ -58,18 +59,24 @@ module Waterfoul
# Storage 1 byte into memory given address # Storage 1 byte into memory given address
# @param i Integer location in memory to storage value # @param i Integer location in memory to storage value
# @param v Integer value to be written into memory # @param v Integer value to be written into memory
def []=(i, v) def []=(i, v, options = {})
# raise exception if an attempt is made to read memory that is out of bounds # raise exception if an attempt is made to read memory that is out of bounds
raise MemoryOutOfBounds if i > MEMORY_SIZE || i < 0 raise MemoryOutOfBounds if i > MEMORY_SIZE || i < 0
case i unless options[:hardware_operation]
when UNMAP_BOOT_ROM_MEM_LOC case i
# unmap the boot rom when 0xFF50 is wrtiten to in memory when UNMAP_BOOT_ROM_MEM_LOC
@map_boot_rom = false if v == 0x1 && @map_boot_rom # unmap the boot rom when 0xFF50 is wrtiten to in memory
when 0x0..0x7FFF @map_boot_rom = false if v == 0x1 && @map_boot_rom
@cartridge[i] = v when 0x0..0x7FFF
when 0xFF46 @cartridge[i] = v
byebug when 0xFF46
byebug
when 0xFF04 # reset divider register
self[i] = 0
else
@memory[i] = v
end
else else
@memory[i] = v @memory[i] = v
end end