From 6bacbe9fdb361175a6ab5787fa7199bd3461316a Mon Sep 17 00:00:00 2001
From: Vince Weaver <vince@deater.net>
Date: Mon, 14 Mar 2022 23:22:32 -0400
Subject: [PATCH] lemm: draw menu to both pages

---
 games/lemm/hgr_hlin.s    | 15 +++++++++++++++
 games/lemm/hgr_vlin.s    |  7 +++++++
 games/lemm/update_menu.s | 11 +++++++++++
 3 files changed, 33 insertions(+)

diff --git a/games/lemm/hgr_hlin.s b/games/lemm/hgr_hlin.s
index 59062d5d..402c6903 100644
--- a/games/lemm/hgr_hlin.s
+++ b/games/lemm/hgr_hlin.s
@@ -21,6 +21,12 @@ hgr_hlin:
 
 	tay			; get row info for Y1 into GBASL/GBASH
 	lda	hposn_high,Y
+
+        ; eor   #$00 draws on page2
+        ; eor   #$60 draws on page1
+hgr_hlin_page_smc:
+        eor     #$00
+
 	sta	GBASH
 	lda	hposn_low,Y
 	sta	GBASL
@@ -198,6 +204,15 @@ hgr_colortbl:
 	.byte $00,$2A,$55,$7F
 	.byte $80,$AA,$D5,$FF
 
+
+hgr_hlin_page_toggle:
+	lda	hgr_hlin_page_smc+1
+	eor	#$60
+	sta	hgr_hlin_page_smc+1
+	rts
+
+
+
 ; notes
 	; 4+3
 	; 0000 CCCC	0000 1111
diff --git a/games/lemm/hgr_vlin.s b/games/lemm/hgr_vlin.s
index 0ee8ae6f..880fda90 100644
--- a/games/lemm/hgr_vlin.s
+++ b/games/lemm/hgr_vlin.s
@@ -45,6 +45,8 @@ hgr_vlin_loop:
 current_row_smc:
 	ldy	#$dd	; get row info for Y1 into GBASL/GBASH
 	lda	hposn_high,Y
+hgr_vlin_page_smc:
+	eor	#$00
 	sta	GBASH
 	lda	hposn_low,Y
 	sta	GBASL
@@ -75,3 +77,8 @@ vlin_masks:
 	.byte $81,$82,$84,$88,$90,$A0,$C0
 
 
+hgr_vlin_page_toggle:
+	lda	hgr_vlin_page_smc+1
+	eor	#$60
+	sta	hgr_vlin_page_smc+1
+	rts
diff --git a/games/lemm/update_menu.s b/games/lemm/update_menu.s
index 6176d2ab..c7180985 100644
--- a/games/lemm/update_menu.s
+++ b/games/lemm/update_menu.s
@@ -57,6 +57,17 @@ draw_button:
 	adc	#15
 	sta	button_smc4+1
 
+	; draw on both pages
+	jsr	actual_button_draw
+	jsr	hgr_hlin_page_toggle
+	jsr	hgr_vlin_page_toggle
+	jsr	actual_button_draw
+	jsr	hgr_hlin_page_toggle
+	jsr	hgr_vlin_page_toggle
+	rts
+
+actual_button_draw:
+
 button_smc1:
 	ldx	#144
 	lda	#168