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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