Add a subdirectory for RAM files

ram/sram.asm

@@ -0,0 +1,53 @@
+SECTION "Sprite Buffers", SRAM
+
+sSpriteBuffer0:: ds SPRITEBUFFERSIZE
+sSpriteBuffer1:: ds SPRITEBUFFERSIZE
+sSpriteBuffer2:: ds SPRITEBUFFERSIZE
+
+	ds $100
+
+sHallOfFame:: ds HOF_TEAM * HOF_TEAM_CAPACITY
+
+
+SECTION "Save Data", SRAM
+
+	ds $598
+
+sGameData::
+sPlayerName::  ds NAME_LENGTH
+sMainData::    ds wMainDataEnd - wMainDataStart
+sSpriteData::  ds wSpriteDataEnd - wSpriteDataStart
+sPartyData::   ds wPartyDataEnd - wPartyDataStart
+sCurBoxData::  ds wBoxDataEnd - wBoxDataStart
+sTileAnimations:: db
+sGameDataEnd::
+sMainDataCheckSum:: db
+
+
+; The PC boxes will not fit into one SRAM bank,
+; so they use multiple SECTIONs
+DEF box_n = 0
+MACRO boxes
+	REPT \1
+		DEF box_n += 1
+	sBox{d:box_n}:: ds wBoxDataEnd - wBoxDataStart
+	ENDR
+ENDM
+
+SECTION "Saved Boxes 1", SRAM
+
+; sBox1 - sBox6
+	boxes 6
+sBank2AllBoxesChecksum:: db
+sBank2IndividualBoxChecksums:: ds 6
+
+SECTION "Saved Boxes 2", SRAM
+
+; sBox7 - sBox12
+	boxes 6
+sBank3AllBoxesChecksum:: db
+sBank3IndividualBoxChecksums:: ds 6
+
+; All 12 boxes fit within 2 SRAM banks
+	ASSERT box_n == NUM_BOXES, \
+		"boxes: Expected {d:NUM_BOXES} total boxes, got {d:box_n}"