mirror of
https://github.com/mattrberry/crab.git
synced 2025-01-30 20:34:45 +01:00
added read/write of waitcnt and a bunch of ppu regs
This commit is contained in:
Matthew Berry
parent
7401788dab
commit
5c6ec3e6f2
2 changed files with 158 additions and 0 deletions
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@ -1,4 +1,20 @@
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class MMIO
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class WAITCNT < BitField(UInt16)
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bool gamepak_type, lock: true
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bool gamepack_prefetch_buffer
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bool not_used, lock: true
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num phi_terminal_output, 2
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num wait_state_2_second_access, 1
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num wait_state_2_first_access, 2
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num wait_state_1_second_access, 1
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num wait_state_1_first_access, 2
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num wait_state_0_second_access, 1
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num wait_state_0_first_access, 2
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num sram_wait_control, 2
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end
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@waitcnt = WAITCNT.new 0
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def initialize(@gba : GBA)
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end
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@ -10,6 +26,8 @@ class MMIO
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@gba.interrupts.read_io io_addr
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elsif io_addr >= 0x130 && io_addr <= 0x133
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@gba.keypad.read_io io_addr
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elsif io_addr >= 0x204 && io_addr <= 0x205
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(@waitcnt.value >> (8 * (io_addr & 1))).to_u8!
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elsif not_used? io_addr
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0xFF_u8 # todo what is returned here?
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else
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@ -25,6 +43,10 @@ class MMIO
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@gba.interrupts.write_io io_addr, value
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elsif io_addr >= 0x130 && io_addr <= 0x133
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@gba.keypad.read_io io_addr
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elsif io_addr >= 0x204 && io_addr <= 0x205
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shift = 8 * (io_addr & 1)
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mask = 0xFF00_u16 >> shift
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@waitcnt.value = (@waitcnt.value & mask) | value.to_u16 << shift
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elsif not_used? io_addr
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else
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abort "Unmapped MMIO write ~ addr:#{hex_str io_addr.to_u32}, val:#{value}"
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136
src/crab/ppu.cr
136
src/crab/ppu.cr
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@ -43,6 +43,74 @@ class PPU
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num offset, 9
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end
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class WINH < BitField(UInt16)
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num x1, 8
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num x2, 8
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end
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class WINV < BitField(UInt16)
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num y1, 8
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num y2, 8
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end
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class WININ < BitField(UInt16)
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num not_used_1, 2, lock: true
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bool window_1_color_special_effect
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bool window_1_obj_enable
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num window_1_enable_bits, 4
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num not_used_0, 2, lock: true
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bool window_0_color_special_effect
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bool window_0_obj_enable
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num window_0_enable_bits, 4
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end
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class WINOUT < BitField(UInt16)
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num not_used_obj, 2, lock: true
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bool obj_window_color_special_effect
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bool obj_window_obj_enable
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num obj_window_enable_bits, 4
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num not_used_outside, 2, lock: true
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bool outside_color_special_effect
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bool outside_obj_enable
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num outside_enable_bits, 4
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end
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class MOSAIC < BitField(UInt16)
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num obj_mosiac_v_size, 4
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num obj_mosiac_h_size, 4
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num bg_mosiac_v_size, 4
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num bg_mosiac_h_size, 4
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end
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class BLDCNT < BitField(UInt16)
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num not_used, 2, lock: true
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bool bd_2nd_target_pixel
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bool obj_2nd_target_pixel
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bool bg3_2nd_target_pixel
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bool bg2_2nd_target_pixel
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bool bg1_2nd_target_pixel
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bool bg0_2nd_target_pixel
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num color_special_effect, 2
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bool bd_1st_target_pixel
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bool obj_1st_target_pixel
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bool bg3_1st_target_pixel
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bool bg2_1st_target_pixel
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bool bg1_1st_target_pixel
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bool bg0_1st_target_pixel
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end
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class BLDALPHA < BitField(UInt16)
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num not_used_13_15, 3, lock: true
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num evb_coefficient, 5
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num not_used_5_7, 3, lock: true
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num eva_coefficient, 5
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end
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class BLDY < BitField(UInt16)
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num not_used, 11, lock: true
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num evy_coefficient, 5
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end
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@framebuffer : Bytes = Bytes.new 0x12C00 # framebuffer as 16-bit xBBBBBGGGGGRRRRR
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getter pram = Bytes.new 0x400
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@ -64,6 +132,16 @@ class PPU
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getter bg2vofs : BGOFS = BGOFS.new 0
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getter bg3hofs : BGOFS = BGOFS.new 0
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getter bg3vofs : BGOFS = BGOFS.new 0
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getter win0h : WINH = WINH.new 0
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getter win1h : WINH = WINH.new 0
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getter win0V : WINV = WINV.new 0
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getter win1V : WINV = WINV.new 0
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getter winin : WININ = WININ.new 0
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getter winout : WINOUT = WINOUT.new 0
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getter mosaic : MOSAIC = MOSAIC.new 0
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getter bldcnt : BLDCNT = BLDCNT.new 0
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getter bldalpha : BLDALPHA = BLDALPHA.new 0
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getter bldy : BLDY = BLDY.new 0
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def initialize(@gba : GBA)
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start_line
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@ -201,6 +279,42 @@ class PPU
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when 0x00D then 0xFF_u8 & @bg2cnt.value >> 8
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when 0x00E then 0xFF_u8 & @bg3cnt.value
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when 0x00F then 0xFF_u8 & @bg3cnt.value >> 8
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when 0x010 then 0xFF_u8 & @bg0hofs.value
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when 0x011 then 0xFF_u8 & @bg0hofs.value >> 8
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when 0x012 then 0xFF_u8 & @bg0vofs.value
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when 0x013 then 0xFF_u8 & @bg0vofs.value >> 8
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when 0x014 then 0xFF_u8 & @bg1hofs.value
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when 0x015 then 0xFF_u8 & @bg1hofs.value >> 8
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when 0x016 then 0xFF_u8 & @bg1vofs.value
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when 0x017 then 0xFF_u8 & @bg1vofs.value >> 8
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when 0x018 then 0xFF_u8 & @bg2hofs.value
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when 0x019 then 0xFF_u8 & @bg2hofs.value >> 8
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when 0x01A then 0xFF_u8 & @bg2vofs.value
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when 0x01B then 0xFF_u8 & @bg2vofs.value >> 8
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when 0x01C then 0xFF_u8 & @bg3hofs.value
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when 0x01D then 0xFF_u8 & @bg3hofs.value >> 8
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when 0x01E then 0xFF_u8 & @bg3vofs.value
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when 0x01F then 0xFF_u8 & @bg3vofs.value >> 8
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when 0x040 then 0xFF_u8 & @win0h.value
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when 0x041 then 0xFF_u8 & @win0h.value >> 8
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when 0x042 then 0xFF_u8 & @win1h.value
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when 0x043 then 0xFF_u8 & @win1h.value >> 8
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when 0x044 then 0xFF_u8 & @win0V.value
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when 0x045 then 0xFF_u8 & @win0V.value >> 8
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when 0x046 then 0xFF_u8 & @win1V.value
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when 0x047 then 0xFF_u8 & @win1V.value >> 8
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when 0x048 then 0xFF_u8 & @winin.value
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when 0x049 then 0xFF_u8 & @winin.value >> 8
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when 0x04A then 0xFF_u8 & @winout.value
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when 0x04B then 0xFF_u8 & @winout.value >> 8
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when 0x04C then 0xFF_u8 & @mosaic.value
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when 0x04D then 0xFF_u8 & @mosaic.value >> 8
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when 0x050 then 0xFF_u8 & @bldcnt.value
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when 0x051 then 0xFF_u8 & @bldcnt.value >> 8
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when 0x052 then 0xFF_u8 & @bldalpha.value
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when 0x053 then 0xFF_u8 & @bldalpha.value >> 8
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when 0x054 then 0xFF_u8 & @bldy.value
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when 0x055 then 0xFF_u8 & @bldy.value >> 8
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else abort "Unmapped PPU read ~ addr:#{hex_str io_addr.to_u8}"
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end
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end
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@ -213,6 +327,8 @@ class PPU
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when 0x003 # undocumented - green swap
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when 0x004 then @dispstat.value = (@dispstat.value & 0xFF00) | value
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when 0x005 then @dispstat.value = (@dispstat.value & 0x00FF) | value.to_u16 << 8
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when 0x006 # vcount
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when 0x007 # vcount
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when 0x008 then @bg0cnt.value = (@bg0cnt.value & 0xFF00) | value
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when 0x009 then @bg0cnt.value = (@bg0cnt.value & 0x00FF) | value.to_u16 << 8
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when 0x00A then @bg1cnt.value = (@bg1cnt.value & 0xFF00) | value
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@ -237,6 +353,26 @@ class PPU
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when 0x01D then @bg3hofs.value = (@bg3hofs.value & 0x00FF) | value.to_u16 << 8
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when 0x01E then @bg3vofs.value = (@bg3vofs.value & 0xFF00) | value
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when 0x01F then @bg3vofs.value = (@bg3vofs.value & 0x00FF) | value.to_u16 << 8
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when 0x040 then @win0h.value = (@win0h.value & 0xFF00) | value
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when 0x041 then @win0h.value = (@win0h.value & 0x00FF) | value.to_u16 << 8
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when 0x042 then @win1h.value = (@win1h.value & 0xFF00) | value
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when 0x043 then @win1h.value = (@win1h.value & 0x00FF) | value.to_u16 << 8
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when 0x044 then @win0V.value = (@win0V.value & 0xFF00) | value
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when 0x045 then @win0V.value = (@win0V.value & 0x00FF) | value.to_u16 << 8
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when 0x046 then @win1V.value = (@win1V.value & 0xFF00) | value
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when 0x047 then @win1V.value = (@win1V.value & 0x00FF) | value.to_u16 << 8
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when 0x048 then @winin.value = (@winin.value & 0xFF00) | value
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when 0x049 then @winin.value = (@winin.value & 0x00FF) | value.to_u16 << 8
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when 0x04A then @winout.value = (@winout.value & 0xFF00) | value
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when 0x04B then @winout.value = (@winout.value & 0x00FF) | value.to_u16 << 8
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when 0x04C then @mosaic.value = (@mosaic.value & 0xFF00) | value
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when 0x04D then @mosaic.value = (@mosaic.value & 0x00FF) | value.to_u16 << 8
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when 0x050 then @bldcnt.value = (@bldcnt.value & 0xFF00) | value
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when 0x051 then @bldcnt.value = (@bldcnt.value & 0x00FF) | value.to_u16 << 8
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when 0x052 then @bldalpha.value = (@bldalpha.value & 0xFF00) | value
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when 0x053 then @bldalpha.value = (@bldalpha.value & 0x00FF) | value.to_u16 << 8
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when 0x054 then @bldy.value = (@bldy.value & 0xFF00) | value
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when 0x055 then @bldy.value = (@bldy.value & 0x00FF) | value.to_u16 << 8
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else abort "Unmapped PPU write ~ addr:#{hex_str io_addr.to_u8}, val:#{value}"
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end
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end
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