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src/memory/hram.asm

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+
+SECTION "HRAM", HRAM
+
+; The OAM DMA routine
+hOAMDMA::
+    ds 8 ; OAMDMAEnd - OAMDMA
+
+
+; Currently-loaded ROM bank, useful to save back (eg. during ints)
+hCurROMBank::
+    db
+
+
+; Used by the PB16 decompressor
+pb16_byte0::
+    db
+
+
+; Place variables that need to be zero-cleared on init (and soft-reset) below
+hClearStart::
+
+
+; Used to let VBlank know it need to ACK
+; NOTE: VBlank doesn't preserve AF **on purpose** when this is set
+; Thus, make sure to wait for Z set before continuing
+hVBlankFlag::
+    db
+
+; Values transferred to hw regs on VBlank
+hLCDC::
+    db
+hSCY::
+    db
+hSCX::
+    db
+hWY::
+    db
+hWX::
+    db
+hBGP::
+    db
+hOBP0::
+    db
+hOBP1::
+    db
+
+
+; Low byte of the current scanline buffer
+; Permits double-buffering
+hWhichScanlineBuffer::
+    db
+; Low byte of byte read by STAT handler
+; NO TOUCHY
+hScanlineFXIndex::
+    db
+
+; Scanline FX buffers (scanline, addr, value)
+; Double-buffering used to prevent ract conditions
+hScanlineFXBuffer1::
+    ds 3 * 5 + 1
+hScanlineFXBuffer2::
+    ds 3 * 5 + 1
+
+; Addr/value pair to allow writing to 2 regs in the same scanline
+hSecondFXAddr::
+    db
+hSecondFXValue::
+    db
+
+hIsTextboxActive::
+    db
+hBackupScanlineFXBuffer::
+    ds 3 * 5 + 1
+
+
+; Joypad regs
+hHeldButtons::
+    db
+hPressedButtons::
+    db
+
+; High byte of the shadow OAM buffer to be transferred
+; Reset by the VBlank handler to signal transfer completion
+hOAMBufferHigh::
+    db

src/memory/vram.asm

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+
+SECTION "VRAM", VRAM[$8000]
+
+
+    ds $1000
+
+; $9000
+
+vBlankTile::
+    ds $10
+
+    ds $7F0
+
+; $9800
+
+    ds SCRN_VX_B * SCRN_VY_B ; $400
+
+; $9C00
+
+    ds SCRN_VX_B * SCRN_VY_B ; $400

src/memory/wram.asm

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+
+SECTION "Error handler memory", WRAM0
+
+; ID of the error that occurred
+wErrorType::
+; Once the ID has been used, this is re-used as a status, to route calls because stack space is available
+wErrorDrawStatus::
+; The status is also used to determine which dump to print
+wErrorWhichDump::
+    db
+
+wErrorRegs::
+; Value of A when the handler is called
+; Re-used as part of the reg dump
+wErrorA::
+; Re-used to hold last frame's keys
+wErrorHeldButtons::
+    db ; a
+; Re-used to hold the number of frames till the debugger is unlocked
+wErrorFramesTillUnlock::
+    db ; f
+    dw ; bc
+    dw ; de
+wErrorHL::
+    dw
+wErrorSP::
+    dw
+
+
+SECTION "Shadow OAM", WRAM0,ALIGN[8]
+
+wShadowOAM::
+    ds $A0
+
+
+SECTION "Stack", WRAM0[$E000 - STACK_SIZE]
+
+wStackTop::
+    ds STACK_SIZE
+wStackBottom::