From 95dac9109c821c8f905e0209b31b62c9d52ff300 Mon Sep 17 00:00:00 2001
From: "B. Watson" <urchlay@slackware.uk>
Date: Thu, 19 Mar 2026 03:02:42 -0400
Subject: Add /RESET command and nreset() func. Mainly for testing.

---
 src/cmd.c |  7 +++++++
 src/nio.c | 16 ++++++++++++++++
 2 files changed, 23 insertions(+)

(limited to 'src')

diff --git a/src/cmd.c b/src/cmd.c
index b463901..84829a2 100644
--- a/src/cmd.c
+++ b/src/cmd.c
@@ -33,6 +33,7 @@ static void do_quit(void);
 static void do_quote(void);
 static void do_topic(void);
 static void do_ver(void);
+static void do_reset(void);
 
 typedef struct {
 	char *cmd;
@@ -66,6 +67,7 @@ cmd_t command_defs[] = {
 	{ "QUIT", do_quit, 0 },
 	{ "QUOTE", do_quote, 1 },
 	{ "TOPIC", do_topic, 0 },
+	{ "RESET", do_reset, 0 },
 	{ "VER", do_ver, 0 },
 	{ "VERSION", do_ver, 0 },
 	{ 0, 0 }
@@ -73,6 +75,11 @@ cmd_t command_defs[] = {
 
 cmd_t *cmd_def;
 
+static void do_reset(void) {
+	extern unsigned char nreset(void);
+	nreset();
+}
+
 static void cmd_chan_text(void) {
 	scr_activate(scr_current);
 
diff --git a/src/nio.c b/src/nio.c
index cdececb..399b06d 100644
--- a/src/nio.c
+++ b/src/nio.c
@@ -148,6 +148,22 @@ unsigned char nwrite(char* devicespec, unsigned char* buf, unsigned short len)
   return OS.dcb.dstats; // Return SIO error or success.
 }
 
+/* https://fujinet.online/wiki/?p=SIO-Command-%24FF-Reset-FujiNet */
+unsigned char nreset(void) {
+  OS.dcb.ddevic   = 0x70;
+  OS.dcb.dunit    = 1;
+  OS.dcb.dcomnd   = 0xff; /* reset */
+  OS.dcb.dstats   = DWRITE;
+  OS.dcb.dbuf     = 0;
+  OS.dcb.dtimlo   = TIMEOUT;
+  OS.dcb.dbyt     = 0;
+  OS.dcb.daux     = 0;
+  siov();
+
+  return OS.dvstat[DVSTAT_EXTENDED_ERROR]; // return extended status
+}
+
+
 /* IRC doesn't need this */
 #if 0
 unsigned char nlogin(char* devicespec, char *login, char *password)
-- 
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