From 5fdd6263a23e5c14b0c3a00ce2baa2a28bc47060 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Fri, 30 Aug 2024 19:47:22 +0200
Subject: [PATCH] FDC37x93x: Always return 0xFF on GPIO reads, allow the code
 in chipset/intel_piix.c to take over instead, fixes CPU speed readout on the
 HP Vectra VL 5 Series 4.

---
 src/sio/sio_fdc37c93x.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/sio/sio_fdc37c93x.c b/src/sio/sio_fdc37c93x.c
index 949c59552..a0152c34a 100644
--- a/src/sio/sio_fdc37c93x.c
+++ b/src/sio/sio_fdc37c93x.c
@@ -32,6 +32,7 @@
 #include <86box/fdd.h>
 #include <86box/fdc.h>
 #include <86box/keyboard.h>
+#include <86box/machine.h>
 #include <86box/nvr.h>
 #include <86box/apm.h>
 #include <86box/acpi.h>
@@ -131,7 +132,8 @@ fdc37c93x_gpio_read(uint16_t port, void *priv)
     const fdc37c93x_t *dev = (fdc37c93x_t *) priv;
     uint8_t            ret = 0xff;
 
-    ret = dev->gpio_regs[port & 1];
+    if (strcmp(machine_get_internal_name(), "vectra54"))
+        ret = dev->gpio_regs[port & 1];
 
     return ret;
 }