From 079c9b078b144ee21f62a5ca40299052c664edf0 Mon Sep 17 00:00:00 2001
From: Patrick Kingston <patrick@pkingston.xyz>
Date: Sat, 14 Feb 2026 20:54:34 -0500
Subject: Create toggleable screens

---
 main.fab        |  50 ++++++++++++++++++++++++++++++++++++++++++++++----
 nEs.nes         | Bin 40976 -> 40976 bytes
 nEslabels.mlb   |  32 ++++++++++++++++++--------------
 spritesheet.chr | Bin 8192 -> 8192 bytes
 4 files changed, 64 insertions(+), 18 deletions(-)

diff --git a/main.fab b/main.fab
index 948bd1c..8b52021 100644
--- a/main.fab
+++ b/main.fab
@@ -1,4 +1,4 @@
-vars /allvars
+vars /ecavars
   U[64] buf         // A buffer that can store the current and next row
   U curr_gen = 0       // Swap these offsets back and forth per generation
   U next_gen = 32
@@ -105,6 +105,8 @@ fn upload_curr_gen()
 
 nmi eca_nmi()
   // Turn on rendering sprites and bg
+  ppu_upload_oam_poll_pads(0)
+
   {PPUMASK}(PPUMASK_ON | PPUMASK_NO_CLIP)
 
   upload_curr_gen()
@@ -114,6 +116,11 @@ nmi eca_nmi()
 // Main mode for running the ECA
 mode eca_main()
 : nmi eca_nmi
+: vars /ecavars
+  nmi
+  nmi
+  nmi
+  nmi
   // Initialize the screen
   init_eca_state()
   // Wait 60 frames before beginning
@@ -122,9 +129,43 @@ mode eca_main()
   // Loop forever:
   while true
     nmi
+    update_pads()
+    if pads[0].held & BUTTON_START
+      goto mode settings()
+      : preserves /ecavars
     calc_and_advance_gen()
 
-charmap(".#-=n!@~E$%^S&*(C)_+A{}|12345678qwertyuiop<asd>")
+//charmap settingsscreen("E", 48)
+
+vars /settings_vars
+  U slow_counter = 0
+
+nmi settings_nmi()
+  // Turn on rendering sprites and bg
+  ppu_upload_oam_poll_pads(0)
+
+  {PPUMASK}(PPUMASK_ON | PPUMASK_NO_CLIP)
+
+  ppu_reset_scroll(0, 0)
+
+mode settings()
+: nmi settings_nmi
+: vars /ecavars
+: vars /settings_vars
+  nmi
+  nmi
+  nmi
+  nmi
+  while true
+    nmi
+    update_pads()
+    //update_cursor()
+    //upload_cursor()
+    if pads[0].held & BUTTON_START
+      goto mode eca_main()
+      : preserves /ecavars
+
+charmap (".#-=n!@~E$%^S&*(C)_+A{}|12345678qwertyuiop<asd>")
 
 data /titlescreen
     [] title
@@ -181,6 +222,7 @@ nmi main_nmi()
 // The main entry point for the program
 mode main()
 : nmi main_nmi
+: vars /titlescreen /ecavars
   // Set the palette:
   palette = example_palette
   ppu_upload_palette()
@@ -210,8 +252,8 @@ mode main()
     nmi
 
   // Go to the main eca mode
-  goto mode eca_main()
-  : preserves /allvars
+  goto mode settings()
+  : preserves /ecavars
 
 // Define the tileset (commonly called CHR):
 chrrom
diff --git a/nEs.nes b/nEs.nes
index cff0c1a..14d5359 100644
Binary files a/nEs.nes and b/nEs.nes differ
diff --git a/nEslabels.mlb b/nEslabels.mlb
index bcf5f9c..6b3797a 100644
--- a/nEslabels.mlb
+++ b/nEslabels.mlb
@@ -1,20 +1,24 @@
-NesPrgRom:000A8D:calc_next_cell@0_0:
-NesPrgRom:000988:calc_and_advance_gen@0_0:
-NesPrgRom:000991:calc_and_advance_gen@0_0_entry:
-NesPrgRom:000A12:eca_nmi@0_1:
-NesPrgRom:000AFA:eca_main@0_0:
-NesPrgRom:0007F8:main_nmi@0_1:
-NesPrgRom:0007FB:main_nmi@0_1_entry:
-NesPrgRom:000250:main@0_0:
-NesPrgRom:00073F:ppu_upload_palette@0_0:
-NesPrgRom:00035F-00073E:title@0_0:
+NesPrgRom:000B21:calc_next_cell@0_0:
+NesPrgRom:000A15:calc_and_advance_gen@0_0:
+NesPrgRom:000A1E:calc_and_advance_gen@0_0_entry:
+NesPrgRom:000A9F:eca_nmi@0_1:
+NesPrgRom:000988:eca_main@0_0:
+NesPrgRom:000BE6:settings_nmi@0_1:
+NesPrgRom:000BC3:settings@0_0:
+NesPrgRom:000826:main_nmi@0_1:
+NesPrgRom:000829:main_nmi@0_1_entry:
+NesPrgRom:000279:main@0_0:
+NesPrgRom:000238:ppu_upload_oam_poll_pads@0_1:
+NesPrgRom:000B8E:update_pads@0_0:
+NesPrgRom:00076D:ppu_upload_palette@0_0:
+NesPrgRom:00038D-00076C:title@0_0:
 NesPrgRom:007FFA-007FFF:runtime_vectors@0_0:
 NesPrgRom:00011C-00012F:runtime_nmi@0_1:
 NesPrgRom:000130-000137:runtime_nmi_exit@0_1:
 NesPrgRom:000139-000147:runtime_wait_nmi@0_0:
-NesPrgRom:00022C-00022E:runtime_nmi_lo_table@0_0:
-NesPrgRom:000230-000232:runtime_nmi_hi_table@0_0:
-NesPrgRom:000234-000236:runtime_nmi_bank_table@0_0:
+NesPrgRom:00022C-00022F:runtime_nmi_lo_table@0_0:
+NesPrgRom:000230-000233:runtime_nmi_hi_table@0_0:
+NesPrgRom:000234-000237:runtime_nmi_bank_table@0_0:
 NesPrgRom:000138-000138:runtime_irq@0_2:
 NesPrgRom:000138-000138:runtime_irq_exit@0_2:
 NesPrgRom:000148-00014D:runtime_reset@0_0:
@@ -28,7 +32,7 @@ NesPrgRom:0001E3-000228:runtime_mul8@0_2:
 NesPrgRom:000100-00010F:runtime_shl4_table@0_0:
 NesPrgRom:000110-000117:runtime_shl5_table@0_0:
 NesPrgRom:000118-00011B:runtime_shl6_table@0_0:
-R:031F:buf@0:
+R:031F:buf@0__slow_counter@0:
 R:000D:curr_gen@0:
 R:0010:next_gen@0:
 R:000E:drawing_row_offset@0:
diff --git a/spritesheet.chr b/spritesheet.chr
index 93d1ad4..fe7a52c 100644
Binary files a/spritesheet.chr and b/spritesheet.chr differ
-- 
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