From bdbc8cbd48765cf287a524bea5ae2323772cc1c8 Mon Sep 17 00:00:00 2001
From: Rangi42 <sylvie.oukaour+rangi42@gmail.com>
Date: Mon, 11 Aug 2025 15:43:27 -0400
Subject: Update hardware.inc to 5.3.0 and use its `JOYP_SGB_*` constants

---
 engine/gfx/palettes.asm | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

(limited to 'engine')

diff --git a/engine/gfx/palettes.asm b/engine/gfx/palettes.asm
index ef532c66..fe69144c 100644
--- a/engine/gfx/palettes.asm
+++ b/engine/gfx/palettes.asm
@@ -338,30 +338,30 @@ SendSGBPacket:
 	ld a, 1
 	ldh [hDisableJoypadPolling], a
 ; send RESET signal (P14=LOW, P15=LOW)
-	xor a
+	xor a ; JOYP_SGB_START
 	ldh [rJOYP], a
 ; set P14=HIGH, P15=HIGH
-	ld a, $30
+	ld a, JOYP_SGB_FINISH
 	ldh [rJOYP], a
 ;load length of packets (16 bytes)
-	ld b, $10
+	ld b, 16
 .nextByte
 ;set bit counter (8 bits per byte)
-	ld e, $08
+	ld e, 8
 ; get next byte in the packet
 	ld a, [hli]
 	ld d, a
 .nextBit0
 	bit 0, d
 ; if 0th bit is not zero set P14=HIGH, P15=LOW (send bit 1)
-	ld a, $10
+	ld a, JOYP_SGB_ONE
 	jr nz, .next0
 ; else (if 0th bit is zero) set P14=LOW, P15=HIGH (send bit 0)
-	ld a, $20
+	ld a, JOYP_SGB_ZERO
 .next0
 	ldh [rJOYP], a
 ; must set P14=HIGH,P15=HIGH between each "pulse"
-	ld a, $30
+	ld a, JOYP_SGB_FINISH
 	ldh [rJOYP], a
 ; rotation will put next bit in 0th position (so  we can always use command
 ; "bit 0, d" to fetch the bit that has to be sent)
@@ -371,11 +371,11 @@ SendSGBPacket:
 	jr nz, .nextBit0
 	dec b
 	jr nz, .nextByte
-; send bit 1 as a "stop bit" (end of parameter data)
-	ld a, $20
+; send bit 0 as a "stop bit" (end of parameter data)
+	ld a, JOYP_SGB_ZERO
 	ldh [rJOYP], a
 ; set P14=HIGH,P15=HIGH
-	ld a, $30
+	ld a, JOYP_SGB_FINISH
 	ldh [rJOYP], a
 	xor a
 	ldh [hDisableJoypadPolling], a
@@ -465,17 +465,17 @@ CheckSGB:
 	and $3
 	cp $3
 	jr nz, .isSGB
-	ld a, $20
+	ld a, JOYP_SGB_ZERO
 	ldh [rJOYP], a
 	ldh a, [rJOYP]
 	ldh a, [rJOYP]
 	call Wait7000
 	call Wait7000
-	ld a, $30
+	ld a, JOYP_SGB_FINISH
 	ldh [rJOYP], a
 	call Wait7000
 	call Wait7000
-	ld a, $10
+	ld a, JOYP_SGB_ONE
 	ldh [rJOYP], a
 	ldh a, [rJOYP]
 	ldh a, [rJOYP]
@@ -486,7 +486,7 @@ CheckSGB:
 	call Wait7000
 	vc_hook Unknown_network_reset
 	call Wait7000
-	ld a, $30
+	ld a, JOYP_SGB_FINISH
 	ldh [rJOYP], a
 	ldh a, [rJOYP]
 	ldh a, [rJOYP]
-- 
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