From 0edbf6ab027b3fd1770636ccf61ad6a048db9361 Mon Sep 17 00:00:00 2001
From: Johannes Theiner <j.theiner@live.de>
Date: Tue, 11 Dec 2018 16:55:56 +0100
Subject: [PATCH] =?UTF-8?q?a4:=20=C3=84nderungen?=
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---
 src/asm/a4.asm | 63 +++++++++++++++++++++++++++++++++-----------------
 1 file changed, 42 insertions(+), 21 deletions(-)

diff --git a/src/asm/a4.asm b/src/asm/a4.asm
index 8d81ce4..0199a3b 100644
--- a/src/asm/a4.asm
+++ b/src/asm/a4.asm
@@ -16,6 +16,7 @@ tcountv		dw 100 * twait	; Impulszaehler fuer Verzoegerung * 10ms
 				; Rueckwaertszaehler
 frei		db 'frei  ', 0	; Texte
 belegt		db 'belegt  ', 0
+dir		db 20
 
 ; Konstanten
 divider		equ 0		; Platzhalter fuer Ihre Zeitkonstante1
@@ -121,7 +122,7 @@ ifzero:
 ifbelowzero: 
 	
 	mov dx, pieces << shcnt
-	and dx, 10000001b
+	and dx, 10000010b
 	mov [status], dx
 	
 	
@@ -194,26 +195,29 @@ init:
 isr_opentimer: ; Timer fuer Vereinzeler (Zeit fuer Oeffnung)
 	push ax
 	
-; Ihr Programmcode
 	;Zeit abgelaufen ?
-	inc byte [divider]
-	cmp byte [divider], tcountv
-	jne isr_opentimer_out
+	mov ah, [divider]
+	mov al, [status]
+	test al, 00000010b
+	jz isr_opentimer_out
 
-	mov ax, [status]
-	and ax, 11111110b
-	mov [status], ax
+	inc ah
+	cmp ah, [tcountv]
+	jnz isr_opentimer_out
 
-	
+	mov ah, 0
+	mov byte[dir], trechts
+	and al, 0xfd
 
 isr_opentimer_out: ; Ausgang aus dem Service
+	mov [status], al
+	mov [divider], ah
 	mov al, eoi		; EOI an PIC
 	out ocw_2_3, al
 	pop ax
 	iret
 	
 isr_lt: ; Lichttaster
-; Ihr Programmcode
 	push ax
 
 	mov al, [status]
@@ -223,12 +227,25 @@ isr_lt: ; Lichttaster
 	times shcnt shl al, 1
 	and byte [status], 00001111b
 	or [status], al
-	
+	mov [status], al
+
+	and al, 11111101b
+	cmp al, 0b
+	jz left
+	cmp al, 10b
+	je right
+
+left:
+	mov byte[dir], tlinks
+	jmp isr_lt_out
+
+right:	
+	mov byte[dir], trechts
+	jmp isr_lt_out
 	
 
 isr_lt_out: ; Ausgang aus dem Service
-	mov [status], al
-	or byte [status], 00000001b
+	or byte [status], 00000010b
 	mov al, eoi		; EOI an PIC
 	out ocw_2_3, al
 	pop ax
@@ -236,20 +253,24 @@ isr_lt_out: ; Ausgang aus dem Service
 	
 isr_servotimer: ; Timer fuer Servo (Vereinzeler)
 	push ax
-	push bx
-; Ihr Programmcode
-	mov bl, [status]
-	and bl, 11111110b
+	
+	mov ah, [tcounts]
+	inc ah
+	cmp ah, [dir]
+	jnz auf
+	out ppi_a, al	
 
-	cmp bl, 0x0
-	jz auf
+auf:
+	cmp ah, tpwm
+	jnz isr_servotimer_out
+	mov al, ppi_pa6
+	out ppi_a, al
 
-	jmp isr_servotimer_out
 	
 
 isr_servotimer_out: ; Ausgang aus dem Service
 	mov al, eoi		; EOI an PIC
 	out ocw_2_3, al
-	pop bx
 	pop ax
 	iret
+