From 51d19f9e8b844c1ba4ebd044ee4307ec0d8078c3 Mon Sep 17 00:00:00 2001
From: Javier <dev.git@javispedro.com>
Date: Sat, 5 Sep 2026 01:05:36 +0200
Subject: moustest: allow changing speed/sensitivity

---
 int33.h    |  2 +-
 moustest.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 71 insertions(+), 2 deletions(-)

diff --git a/int33.h b/int33.h
index b36b8f4..df870be 100644
--- a/int33.h
+++ b/int33.h
@@ -319,7 +319,7 @@ static void int33_get_sensitivity(uint16_t *sens_x, uint16_t *sens_y, uint16_t *
 	"pop bx" \
 	"mov [bx], dx" \
 	__parm [si] [di] [dx] \
-	__modify [ax]
+	__modify [ax bx cx dx]
 
 static uint16_t int33_get_driver_version(void);
 #pragma aux int33_get_driver_version = \
diff --git a/moustest.c b/moustest.c
index cca2b63..3270c9c 100644
--- a/moustest.c
+++ b/moustest.c
@@ -3,6 +3,7 @@
 #include <stdlib.h>
 #include <stdarg.h>
 #include <string.h>
+#include <ctype.h>
 
 #include <dos.h>
 #include <conio.h>
@@ -141,7 +142,7 @@ void gui_draw_title()
 	const int cols = vidconf.numtextcols;
 
 	gui_draw_textwindow(1, 1, 1, cols, GUI_COLOR_BAR);
-	gui_print(GUI_COLOR_BAR, "MOUSTEST   ESC to exit, 'm' mode, 'r' reset, 's' show, 'h' hide");
+	gui_print(GUI_COLOR_BAR, "MOUSTEST   ESC to exit, 'm'ode, 'r'eset, 's'how, 'h'ide, s'p'eed");
 }
 
 void gui_draw_status()
@@ -302,6 +303,34 @@ void console_printf(const char *format, ...)
 	console_print(buffer);
 }
 
+int console_getline(char *buffer, int maxlen)
+{
+	int bufpos = 0;
+
+	while (bufpos < maxlen) {
+		int c = getch();
+		switch (c) {
+		case 0: // Extended: consume and ignore
+			c = getch();
+			break;
+		case 27: // ESC
+			console_print("\n");
+			return -1;
+		case '\r':
+			buffer[bufpos] = '\0';
+			console_print("\n");
+			return bufpos;
+		default:
+			if (isalnum(c) || isspace(c)) {
+				buffer[bufpos++] = c;
+				console_printf("%c", c); // Echo
+			 }
+		}
+	}
+
+	return bufpos;
+}
+
 struct modeentry {
 	char *name;
 	int modenum;
@@ -554,6 +583,44 @@ void mouse_report()
 	console_printf("Number of wheels: %u\n", num_wheels);
 }
 
+void mouse_speed()
+{
+	uint16_t speed_x, speed_y, double_speed_threshold;
+	bool update = false;
+	char buffer[16] = {'\0'};
+	int ret;
+
+	int33_get_sensitivity(&speed_x, &speed_y, &double_speed_threshold);
+
+	console_printf("X speed [default=8, current=%u] ? ", speed_x);
+	ret = console_getline(buffer, sizeof(buffer)-1);
+	if (ret > 0) {
+		speed_x = atoi(buffer);
+		update = true;
+	}
+
+	console_printf("Y speed [default=16, current=%u] ? ", speed_y);
+	ret = console_getline(buffer, sizeof(buffer)-1);
+	if (ret > 0) {
+		speed_y = atoi(buffer);
+		update = true;
+	}
+
+	console_printf("Double speed threshold [default=64, current=%u] ? ", double_speed_threshold);
+	ret = console_getline(buffer, sizeof(buffer)-1);
+	if (ret > 0) {
+		double_speed_threshold = atoi(buffer);
+		update = true;
+	}
+
+	if (update) {
+		int33_set_sensitivity(speed_x, speed_y, double_speed_threshold);
+		console_printf("Values updated: %u %u %u\n", speed_x, speed_y, double_speed_threshold);
+	} else {
+		console_printf("No values changed\n");
+	}
+}
+
 void mouse_quit()
 {
 	int33_reset();
@@ -728,6 +795,8 @@ int main(int argc, const char *argv[])
 					}
 				}
 				break;
+			case 'p':
+				mouse_speed();
 			case 'd':
 				mouse_debug();
 				break;
-- 
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