From f7475b0b3150dcdc9b1ab899ebaabb5440261d90 Mon Sep 17 00:00:00 2001
From: Martin Preuss <martin@aquamaniac.de>
Date: Mon, 16 Feb 2026 01:10:15 +0100
Subject: [PATCH] avr: added support for 16MHz clock.

---
 avr/devices/all/hw_m644p.asm | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/avr/devices/all/hw_m644p.asm b/avr/devices/all/hw_m644p.asm
index f681530..05caf05 100644
--- a/avr/devices/all/hw_m644p.asm
+++ b/avr/devices/all/hw_m644p.asm
@@ -131,6 +131,14 @@ systemSetupTimer0:            ; setup timer for IRQ every 100ms
   ldi r16, 20
   sts baseTimerModuleReloadValue, r16
   sts baseTimerModuleTickCounter, r16
+.elif clock == 16000000
+  ; CMP-A interrupt about every 10ms
+  ldi r16, 98-1      ; (16,000,000 Hz/1024/10) = 156.25 Hz = 6.4ms
+  outr OCR0A, r16
+
+  ldi r16, 16
+  sts baseTimerModuleReloadValue, r16
+  sts baseTimerModuleTickCounter, r16
 .else
   .error "Unhandled clock frequency"
 .endif