.gitignore

@@ -5,4 +5,3 @@
 *.lst
 *.note
 ./build/*
-*.lbl

host/mainloop.s

@@ -1,26 +1,14 @@
 ;;; -*- Mode: asm; indent-tabs-mode: t; tab-width: 8 -*-
 .scope mainsetup
-;; 	USERPROG	=	$C000
+	USERPROG	=	$C000
-;; 	.repeat 4, I
+	.repeat 4, I
-;; 	ldy #$00
+	ldy #$00
-;; :
+:
-;; 	lda batch_userprog+(I*256),Y
+	lda batch_userprog+(I*256),Y
-;; 	sta USERPROG+(I*256),Y
+	sta USERPROG+(I*256),Y
-;; 	dey
+	dey
-;; 	bne :-
+	bne :-
-;; 	.endrep
+	.endrep
-
-@waitstart: ;; Wait until joystick 2 has been pulled down to start the program
-	lda $dc00
-	and #$02
-	bne @waitstart
-
-	jsr setup_loader
-	inc $d020
-@trying:
-	dec $d020
-	jsr maybe_download_userprog
-	beq @trying
 .endscope
 
 .scope mainloop
@@ -35,7 +23,6 @@ ml:
 	and $01
 	sta $01
 
-	;;jsr maybe_download_userprog
 	jsr USERPROG
 
 	;; Bank out character ROM, I/O in

host/source.s

@@ -12,16 +12,13 @@
 .include "STARTUP.s"
 ;.include "dubbel_buffer/raster_irqs.s"
 
-.include "mainloop.s"
-.include "loader.s"
-
 ;.include "routines/arithmatic/mult_test.s"
 ;.include "routines/arithmatic/div_test.s"
 ;.include "routines/circle/circle_test.s"
 ;.include "routines/circle/circle_test_size.s"
 ;.include "routines/circle/circle_test_position.s"
 ;.include "routines/line/line_test.s"
-;.include "routines/line/line_test_extensive.s"
+.include "routines/line/line_test_extensive.s"
 ;.include "routines/text/char_draw_test.s"
 ;.include "routines/pixel/pixel_test.s"
 ;.include "routines/memory/memcpy_test.s"
@@ -42,7 +39,7 @@ JMP exit
 .include "routines/arithmatic/mult.s"
 .include "routines/arithmatic/div.s"
 
-;batch_userprog:
+batch_userprog:
-;.incbin "userprog.bin", 0, 1024
+.incbin "userprog.bin", 0, 1024
 
 .include "END.s"

wip-duuqnd/loader.s

@@ -20,46 +20,46 @@
 
 ;; More documentation on the Joystick port can be found here: https://www.c64-wiki.com/wiki/Joystick
 
+
 	progdest	=	$fe
 	CLKMASK		=	%00000010
 	CTRL1		=	$DC01
 
-setup_loader:
+	.org $80d
-	;; Bank out character ROM, I/O in
+coldstart: ;; Draw an at sign on screen to show that program has loaded
-	lda #%00000100
+	lda #$0
-	ora $01
+	sta $400
-	sta $01
-
-	lda #$00
 	sta progdest
 	lda #$c0
 	sta progdest+1
+waitstart: ;; Wait until joystick 2 has been pulled down to start the program
+	lda $dc00
+	and #$02
+	bne waitstart
+
+	;; Change border colour for debugging
+	lda #$03
+	sta $d020
+teststart:
+	jsr check_for_load_start ; Check if start_bit is correct
+	bcs @error   ; The routine sets carry in the event of an error
+	beq teststart
+@doneforever:
+	jmp $c000   ; starts the program?
+@error:
+	lda #1
 	rts
 
-maybe_download_userprog:
+check_for_load_start:
-	;; Bank out character ROM, I/O in
-	lda #%00000100
-	ora $01
-	sta $01
-
 	lda #CLKMASK
 	bit CTRL1
-	bne download_userprog
+	bne start
-
 	lda #$00
 	rts
-
+start:
-download_userprog:
-.scope userprog_downloader
 	sei
-
-	lda #$00
-	sta progdest
-	lda #$c0
-	sta progdest+1
-
 	;; change border color for debugging purposes
-	ldx #$02		; X needed for more than that debug color
+	ldx #$02
 	stx $d020
 	ldy #$00
 	jmp new_byte
@@ -70,9 +70,6 @@ wait_for_bit_start:
 	bit CTRL1
 	beq @loop
 
-	lda #$06
-	sta $d020
-
 	lda #CLKMASK
 	bit CTRL1
 	beq error
@@ -125,7 +122,7 @@ wait_for_bit_end:
 	bit CTRL1
 	bne @loop
 	;; Debug show the clock is low
-	lda #$02
+	lda #$00
 	sta $d020
 
 	jmp wait_for_bit_start
@@ -140,11 +137,9 @@ error:
 	;; TODO
 	cli
 	sec
-	jmp $c000
 	rts
 
 BYTE		= $400
 LEN		= $402
 stop:		.word $0000
 loaded:		.byte 0
-.endscope