From ee103457fa9a7a48f0782efcafbc526fbde7a803 Mon Sep 17 00:00:00 2001
From: SarahW <pcem@pcem-emulator.co.uk>
Date: Sat, 7 Mar 2020 14:36:30 +0000
Subject: [PATCH] Add waitstates to AT keyboard read. Fixes keyboard detection
 on Advanced/EV & ZP.

---
 src/keyboard_at.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/keyboard_at.c b/src/keyboard_at.c
index 7ef516f..c298da7 100644
--- a/src/keyboard_at.c
+++ b/src/keyboard_at.c
@@ -663,6 +663,8 @@ void keyboard_at_write(uint16_t port, uint8_t val, void *priv)
 uint8_t keyboard_at_read(uint16_t port, void *priv)
 {
         uint8_t temp = 0xff;
+        
+        cycles -= ISA_CYCLES(8);
 //        if (port != 0x61) pclog("keyboard_at : read %04X ", port);
         if (romset == ROM_XI8088 && port == 0x63)
                 port = 0x61;