From 438648dc884712056ad7cb0c02279c74f55f3c51 Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Wed, 28 Jun 2023 01:12:08 +0300
Subject: [PATCH] testpico: more messing to better understand timers
---
testpico/asmtools.S | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/testpico/asmtools.S b/testpico/asmtools.S
index 807ac9a..6be859a 100644
--- a/testpico/asmtools.S
+++ b/testpico/asmtools.S
@@ -498,9 +498,16 @@ test_ym_ab_sync:
beq 0b /* 10|8 */
0:
move.b #0x3f, (a1) /* 12 start a, clear */
- moveq.l #3, d1 /* 12 cycles for old flag to clear itself */
- nop
- nop
+ move.w #(1800/10-1), d0 /* waste cycles */
+0:
+ dbra d0, 0b
+
+ ymwrite a0, a1, #0x24, #0x00 /* 30 show that rewriting count */
+ ymwrite a0, a1, #0x25, #0x00 /* 30 does nothing */
+ ymwrite a0, a1, #0x26, #0x00 /* 30 */
+ ymwrite a0, a1, #0x27, #0x0f /* 30 setting already set bits too */
+ moveq.l #0, d0
+ moveq.l #3, d1
0:
move.b (a0), d0
and.b d1, d0
--
2.39.5