# HG changeset patch
# User Michael Pavone <pavone@retrodev.com>
# Date 1449445356 28800
# Node ID 73732ae76fa8a5f3abdc295c8accf4487bf93227
# Parent  c030e4af32b7d17d83121228421a23e965c27f46
IO port pins should read as high from the perspective of a device when they are set as inputs

diff -r c030e4af32b7 -r 73732ae76fa8 io.c
--- a/io.c	Sat Dec 05 18:40:34 2015 -0800
+++ b/io.c	Sun Dec 06 15:42:36 2015 -0800
@@ -1164,7 +1164,8 @@
 uint8_t io_data_read(io_port * port, uint32_t current_cycle)
 {
 	uint8_t control = port->control | 0x80;
-	uint8_t th = control & port->output & 0x40;
+	uint8_t output = (control & port->output) | (~control & 0xFF);
+	uint8_t th = output & 0x40;
 	uint8_t input;
 	switch (port->device_type)
 	{
@@ -1207,7 +1208,7 @@
 	}
 	case IO_MOUSE:
 	{
-		uint8_t tr = control & port->output & TR;
+		uint8_t tr = output & TR;
 		if (th) {
 			if (tr) {
 				input = 0x10;