diff --git a/src/board/system76/galp3-c/board.mk b/src/board/system76/galp3-c/board.mk
index eef4650..8757d67 100644
--- a/src/board/system76/galp3-c/board.mk
+++ b/src/board/system76/galp3-c/board.mk
@@ -16,7 +16,7 @@ SCRATCH_CC=\
 	sdcc \
 	-mmcs51 \
 	--model-small \
-	--code-size 1024 \
+	--code-size 2048 \
 	--Werror
 
 # Convert from binary file to C header
diff --git a/src/board/system76/galp3-c/scratch.c b/src/board/system76/galp3-c/scratch.c
index 6b089d2..5649f48 100644
--- a/src/board/system76/galp3-c/scratch.c
+++ b/src/board/system76/galp3-c/scratch.c
@@ -8,13 +8,25 @@ uint8_t __code scratch_rom[] = {
     #include <scratch.h>
 };
 
-// Scratch RAM 1 is 1024 bytes, located at 2048 bytes
-volatile uint8_t __xdata __at(0x0800) scratch_ram_1[1024];
+// Scratch RAM 1, 2, 3, and 4 are 2048 bytes total, located at 0x0800 bytes
+volatile uint8_t __xdata __at(0x0800) scratch_ram[2048];
 
 volatile uint8_t __xdata __at(0x1043) SCAR1L;
 volatile uint8_t __xdata __at(0x1044) SCAR1M;
 volatile uint8_t __xdata __at(0x1045) SCAR1H;
 
+volatile uint8_t __xdata __at(0x1046) SCAR2L;
+volatile uint8_t __xdata __at(0x1047) SCAR2M;
+volatile uint8_t __xdata __at(0x1048) SCAR2H;
+
+volatile uint8_t __xdata __at(0x1049) SCAR3L;
+volatile uint8_t __xdata __at(0x104A) SCAR3M;
+volatile uint8_t __xdata __at(0x104B) SCAR3H;
+
+volatile uint8_t __xdata __at(0x104C) SCAR4L;
+volatile uint8_t __xdata __at(0x104D) SCAR4M;
+volatile uint8_t __xdata __at(0x104E) SCAR4H;
+
 // Create new segment located at 0x1000, after scratch ROM mapping
 static void scratch_start(void) __naked {
 	__asm
@@ -27,24 +39,36 @@ static void scratch_start(void) __naked {
 
 // Enter scratch ROM
 int scratch_trampoline(void) {
-	// Uses SCAR1 which is mapped at 0x0800 in data space and is 1024 bytes in
-	// size. SCAR0 cannot be used due to __pdata overwriting it.
+	// Uses SCAR1, 2, 3, and 4 which are mapped at 0x0800 in data space and are
+    // 2048 bytes in size. SCAR0 cannot be used due to __pdata overwriting it.
 
     int i;
     // Copy scratch ROM
-    for (i = 0; i < ARRAY_SIZE(scratch_rom) && i < ARRAY_SIZE(scratch_ram_1); i++) {
-        scratch_ram_1[i] = scratch_rom[i];
+    for (i = 0; i < ARRAY_SIZE(scratch_rom) && i < ARRAY_SIZE(scratch_ram); i++) {
+        scratch_ram[i] = scratch_rom[i];
     }
 
     // Fill the rest with nop
-    for (; i < ARRAY_SIZE(scratch_ram_1); i++) {
-        scratch_ram_1[i] = 0x00;
+    for (; i < ARRAY_SIZE(scratch_ram); i++) {
+        scratch_ram[i] = 0x00;
     }
 
-    // Set mapping at 0x0000 and enable
+    // Set scratch RAM 1 mapping at 0x0000 and enable
     SCAR1L = 0x00;
     SCAR1M = 0x00;
     SCAR1H = 0x00;
+    // Set scratch RAM 2 mapping at 0x0400 and enable
+    SCAR2L = 0x00;
+    SCAR2M = 0x04;
+    SCAR2H = 0x00;
+    // Set scratch RAM 3 mapping at 0x0600 and enable
+    SCAR3L = 0x00;
+    SCAR3M = 0x06;
+    SCAR3H = 0x00;
+    // Set scratch RAM 4 mapping at 0x0800 and enable
+    SCAR4L = 0x00;
+    SCAR4M = 0x08;
+    SCAR4H = 0x00;
 
     // Jump to scratch reset function
     __asm__("ljmp 0");