From c9c562a372f808f9474b14daf0ae23d32c86da8d Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Fri, 12 May 2023 17:39:09 +0100
Subject: Add some comments

---
 game/main.asm | 53 ++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 38 insertions(+), 15 deletions(-)

(limited to 'game/main.asm')

diff --git a/game/main.asm b/game/main.asm
index 8abd239..4b9a81f 100644
--- a/game/main.asm
+++ b/game/main.asm
@@ -4,7 +4,11 @@
 
     call init
 
+;
+; Menu entry point
+;
 menu:
+    ; reset the blink flag
     ld x, <blink
     ld a, >blink
     ld y, 0
@@ -27,6 +31,10 @@ menu_loop:
     bnz
     jmp menu_loop
 
+
+;
+; Gameplay entry point
+;
 play:
     call init_game
 
@@ -49,21 +57,9 @@ game_loop:
 
     jmp menu
 
-init:
-    ; setup an int handler so we
-    ; can use the frame int to sync
-    ld a, >INT_VECTOR
-    ld x, <INT_VECTOR
-    ld b, <int_handler
-    ld [a : x], b
-    inc x
-    ld b, >int_handler
-    ld [a : x], b
-
-    ; enable interrupts
-    cif
-    ret
-
+;
+; Setup the game after the menu
+;
 init_game:
     halt
 
@@ -84,6 +80,9 @@ init_game:
 
     ret
 
+;
+; Helper to clear the screen
+;
 clear_screen:
     ; erase the screen
     ld b, 0
@@ -101,9 +100,15 @@ fill_loop:
     jmp fill_loop
     ret
 
+;
+; Controls the blink of the "press start" text
+;
 blink:
     .db 0
 
+;
+; Draws the menu
+;
 menu_draw:
     ; settings mode
     ld y, 128
@@ -222,6 +227,24 @@ menu_continue_start:
     port b, y
     ret
 
+;
+; Init the TR8 (setup an int handler)
+;
+init:
+    ; setup an int handler so we
+    ; can use the frame int to sync
+    ld a, >INT_VECTOR
+    ld x, <INT_VECTOR
+    ld b, <int_handler
+    ld [a : x], b
+    inc x
+    ld b, >int_handler
+    ld [a : x], b
+
+    ; enable interrupts
+    cif
+    ret
+
 int_handler:
     iret
 
-- 
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