diff --git a/constants/hardware_constants.asm b/constants/hardware_constants.asm
index ae2e97a6b..9cb278622 100644
--- a/constants/hardware_constants.asm
+++ b/constants/hardware_constants.asm
@@ -1,4 +1,19 @@
-; Graciously aped from http://nocash.emubase.de/pandocs.htm .
+; Graciously aped from:
+; http://nocash.emubase.de/pandocs.htm
+; http://gameboy.mongenel.com/dmg/asmmemmap.html
+
+; memory map
+VRAM_Begin  EQU $8000
+VRAM_End    EQU $a000
+SRAM_Begin  EQU $a000
+SRAM_End    EQU $c000
+WRAM0_Begin EQU $c000
+WRAM0_End   EQU $d000
+WRAM1_Begin EQU $d000
+WRAM1_End   EQU $e000
+; hardware registers $ff00-$ff80 (see below)
+HRAM_Begin  EQU $ff80
+HRAM_End    EQU $ffff
 
 ; MBC3
 MBC3SRamEnable EQU $0000
diff --git a/docs/bugs_and_glitches.md b/docs/bugs_and_glitches.md
index 3c940ef78..b4a8f9a59 100644
--- a/docs/bugs_and_glitches.md
+++ b/docs/bugs_and_glitches.md
@@ -1398,8 +1398,8 @@ ClearWRAM:: ; 25a
 	push af
 	ld [rSVBK], a
 	xor a
-	ld hl, WRAM1_Start
-	ld bc, WRAM1_End - WRAM1_Start
+	ld hl, WRAM1_Begin
+	ld bc, WRAM1_End - WRAM1_Begin
 	call ByteFill
 	pop af
 	inc a
diff --git a/engine/intro_menu.asm b/engine/intro_menu.asm
index 7dd6cc01b..77d1af6f9 100755
--- a/engine/intro_menu.asm
+++ b/engine/intro_menu.asm
@@ -111,8 +111,8 @@ _ResetWRAM: ; 5bae
 	xor a
 	call ByteFill
 
-	ld hl, WRAM1_Start
-	ld bc, wGameData - WRAM1_Start
+	ld hl, WRAM1_Begin
+	ld bc, wGameData - WRAM1_Begin
 	xor a
 	call ByteFill
 
diff --git a/home/init.asm b/home/init.asm
index 41bc3960f..daac79da3 100644
--- a/home/init.asm
+++ b/home/init.asm
@@ -69,8 +69,8 @@ Init:: ; 17d
 	ld [rLCDC], a
 
 ; Clear WRAM bank 0
-	ld hl, WRAM0_Start
-	ld bc, WRAM0_End - WRAM0_Start
+	ld hl, WRAM0_Begin
+	ld bc, WRAM0_End - WRAM0_Begin
 .ByteFill:
 	ld [hl], 0
 	inc hl
@@ -87,8 +87,8 @@ Init:: ; 17d
 	ld a, [hFFEA]
 	push af
 	xor a
-	ld hl, HRAM_START
-	ld bc, HRAM_END - HRAM_START
+	ld hl, HRAM_Begin
+	ld bc, HRAM_End - HRAM_Begin
 	call ByteFill
 	pop af
 	ld [hFFEA], a
@@ -201,8 +201,8 @@ ClearWRAM:: ; 25a
 	push af
 	ld [rSVBK], a
 	xor a
-	ld hl, WRAM1_Start
-	ld bc, WRAM1_End - WRAM1_Start
+	ld hl, WRAM1_Begin
+	ld bc, WRAM1_End - WRAM1_Begin
 	call ByteFill
 	pop af
 	inc a
diff --git a/hram.asm b/hram.asm
index d036085bc..3f84d19ca 100644
--- a/hram.asm
+++ b/hram.asm
@@ -1,4 +1,3 @@
-HRAM_START         EQU $ff80
 hPushOAM           EQU $ff80 ; 10 bytes
 
 hROMBankBackup     EQU $ff8a
@@ -124,5 +123,3 @@ hDMATransfer       EQU $ffe8
 hMobile            EQU $ffe9
 hFFEA              EQU $ffea
 hClockResetTrigger EQU $ffeb
-
-HRAM_END EQU $ffff
diff --git a/sram.asm b/sram.asm
index 95b4f1eee..0b44c9304 100644
--- a/sram.asm
+++ b/sram.asm
@@ -1,9 +1,3 @@
-SRAM_Begin EQU $a000
-SRAM_End   EQU $c000
-
-GLOBAL SRAM_Begin, SRAM_End
-
-
 SECTION "Scratch", SRAM
 
 sScratch:: ds $600 ; a000
diff --git a/vram.asm b/vram.asm
index 6f7b6eb15..fdb0dc159 100644
--- a/vram.asm
+++ b/vram.asm
@@ -1,9 +1,3 @@
-VRAM_Begin EQU $8000
-VRAM_End   EQU $a000
-
-GLOBAL VRAM_Begin, VRAM_End
-
-
 SECTION "VRAM0", VRAM
 
 VTiles0:: ds $800
diff --git a/wram.asm b/wram.asm
index d741f5206..5c0cd5929 100644
--- a/wram.asm
+++ b/wram.asm
@@ -1,14 +1,9 @@
 INCLUDE "includes.asm"
 INCLUDE "macros/wram.asm"
+
+
 INCLUDE "vram.asm"
 
-WRAM0_Start EQU $c000
-WRAM0_End   EQU $d000
-WRAM1_Start EQU $d000
-WRAM1_End   EQU $e000
-
-GLOBAL WRAM0_Start, WRAM0_End, WRAM1_Start, WRAM1_End
-
 
 SECTION "Stack", WRAM0