From 74fa3423b3feafe4877c3bfc819462e80797ed3a Mon Sep 17 00:00:00 2001
From: Bernard Blackham <dagobah@ucc.asn.au>
Date: Wed, 23 Jun 2004 15:20:57 +0000
Subject: [PATCH] Bugfixes
---
ROM2/sci.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/ROM2/sci.c b/ROM2/sci.c
index fe59f75..646e443 100644
--- a/ROM2/sci.c
+++ b/ROM2/sci.c
@@ -113,10 +113,14 @@ void serial_rti() { /* called every 6.6 ms */
/* for gdb compatibility */
int serial_readchar(u8 timeout) {
+ int ret;
sci_timer = timeout * 152;
while (sci_timer && sci_rx_buf_ptr_start == sci_rx_buf_ptr); /* spin */
if (sci_timer == 0) return SERIAL_TIMEOUT;
- return sci_rx_buf[sci_rx_buf_ptr_start++];
+ ret = sci_rx_buf[sci_rx_buf_ptr_start];
+ sci_rx_buf_ptr_start++;
+ sci_rx_buf_ptr_start %= BUFFER_LEN;
+ return ret;
}
void serial_write(const char *str, int len) {
@@ -127,3 +131,4 @@ void serial_write(const char *str, int len) {
_io_ports[M6811_SCDR] = *c; /* send byte */
}
}
+
--
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