From 8fde6f1e74a8a0ae002c3f73a2a99fb5dd6f3e0d Mon Sep 17 00:00:00 2001
From: giomba <giomba@glgprograms.it>
Date: Wed, 11 Aug 2021 21:23:00 +0200
Subject: [PATCH] some comments and minor fixes

---
 Makefile  | 13 ++-----------
 frame.cpp |  5 +++++
 main.S    | 13 -------------
 main.c    |  1 -
 4 files changed, 7 insertions(+), 25 deletions(-)

diff --git a/Makefile b/Makefile
index 00fe984..16144a5 100644
--- a/Makefile
+++ b/Makefile
@@ -25,17 +25,8 @@ SRCS		+= main.c
 
 # asm files
 # S maiuscola! Invoca prima il compilatore gcc che interpreta macro e altro
-# ASRC       = main.S
-ASRC 		+= main.S frame.S
-#ASRC 		+= video.S
-#ASRC 		+= sleep.S
-# ASRC 		+= variables.S
-#ASRC 		+= lines/line_white.S
-#ASRC 		+= lines/line_black.S
-#ASRC 		+= lines/line_mid.S
-#ASRC 		+= lines/line_syncs.S
-#ASRC 		+= lines/line_calc.S
-# ASRC 		+= lines/line_digits.S
+ASRC 		+= main.S
+ASRC		+= frame.S
 
 # header files
 # Specify here libraries! Makefile will check existance before launching
diff --git a/frame.cpp b/frame.cpp
index 0fb820c..e2d29f6 100644
--- a/frame.cpp
+++ b/frame.cpp
@@ -1,3 +1,8 @@
+/*  frame.cpp
+ *  Takes a black/white (1bpp) PNM ASCII-armored image as input,
+ *  and produces the frame.S assembly code to draw it
+ *  as an analog video signal for this project's kernel.
+ * */
 #include <iostream>
 #include <fstream>
 
diff --git a/main.S b/main.S
index c2ddf76..20e17c7 100644
--- a/main.S
+++ b/main.S
@@ -61,8 +61,6 @@ int_horizontal_sync:    ; +3
     cpi r31, 0          ; +21
     breq enter          ; +23
     jmp int_horizontal_sync_end
-#    cpi r30, VERTICAL_OFFSET        ; +23
-#    brlo int_horizontal_sync_end    ; +24
 
 enter:
     ; here, +23 or +24 cycles have passed since horizontal sync
@@ -112,17 +110,6 @@ int_timer_0:
 
     ijmp
 
-#    ; draw things
-#    ldi r30, lo8(line_buffer)
-#    ldi r31, hi8(line_buffer)
-
-#.rept LINE_BUFFER_SIZE
-#    ld r29, z+
-#    out IO(PORTB), r29
-#    nop
-#.endr
-
-
 .global jump_table_return_address
 jump_table_return_address:
     pop r29
diff --git a/main.c b/main.c
index 13710ce..6c74c6c 100644
--- a/main.c
+++ b/main.c
@@ -5,7 +5,6 @@
 
 volatile uint16_t frame;
 volatile uint16_t line;
-volatile char line_buffer[LINE_BUFFER_SIZE];
 
 ISR(INT0_vect, ISR_NAKED) {
     asm("jmp int_vertical_sync");