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From: Wolfram Sang <ninja@the-dreams.de>
Date: Sat, 29 Oct 2011 19:01:11 +0200
Subject: [PATCH] Add IOBASE and pseudo-timer (will give RND-functionality)
Signed-off-by: Wolfram Sang <ninja@the-dreams.de>
# ---
# 20091210 rsc: check if there is another upstream version
# 20081127 wsa: already sent mainline and accepted.
---
runtime.c | 14 ++++++++++++--
1 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/runtime.c b/runtime.c
index 454000e..2c3c54b 100644
--- a/runtime.c
+++ b/runtime.c
@@ -29,6 +29,7 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
+#include <time.h>
unsigned char RAM[65536];
@@ -155,6 +156,7 @@ init_os(int argc, char **argv) {
interactive = 1;
f = NULL;
}
+ srand(time(NULL));
}
static void
@@ -565,8 +567,16 @@ PLOT() {
/* IOBASE */
static void
IOBASE() {
- printf("UNIMPL: IOBASE\n");
- exit(1);
+ /*
+ * IOBASE is just used inside RND to get a timer value.
+ * So, let's fake this here, too.
+ */
+ int pseudo_timer = rand();
+ RAM[0xDC04] = pseudo_timer&0xff;
+ RAM[0xDC05] = pseudo_timer>>8;
+
+ X = 0x00;
+ Y = 0xDC;
}
int
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