From 6611c641465fa088d2752cda78ecf867b7e9aeb9 Mon Sep 17 00:00:00 2001
From: Andreas 'phix' Jonsson <mail@andreasjonsson.se>
Date: Wed, 8 Nov 2023 15:25:33 +0100
Subject: [PATCH] Fixed turbo mode switch

---
 front/sdl/main.c   | 8 +++++++-
 front/sdl/window.c | 2 ++
 lib/vxt/ppi.c      | 3 +--
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/front/sdl/main.c b/front/sdl/main.c
index be0f081f..757aff17 100644
--- a/front/sdl/main.c
+++ b/front/sdl/main.c
@@ -983,7 +983,13 @@ int main(int argc, char *argv[]) {
 					break;
 				case SDL_KEYUP:
 					if (e.key.keysym.sym == SDLK_F11) {
-						if ((e.key.keysym.mod & KMOD_CTRL)) {
+						if (e.key.keysym.mod & KMOD_ALT) {
+							printf("Toggle turbo!\n");
+							SYNC(
+								vxt_byte data = ppi_device->io.in(VXT_GET_DEVICE_PTR(ppi_device), 0x61);
+								ppi_device->io.out(VXT_GET_DEVICE_PTR(ppi_device), 0x61, data ^ 4);
+							);
+						} else if (e.key.keysym.mod & KMOD_CTRL) {
 							open_window(ctx, "Eject");
 						} else {
 							if (SDL_GetWindowFlags(window) & SDL_WINDOW_FULLSCREEN) {
diff --git a/front/sdl/window.c b/front/sdl/window.c
index 5208c7ea..37b74c29 100644
--- a/front/sdl/window.c
+++ b/front/sdl/window.c
@@ -63,6 +63,7 @@ void help_window(mu_Context *ctx) {
 
 		const char *text_l =
 			"<F11>\n"
+			"<Alt+F11>\n"
 			"<Ctrl+F11>\n"
 			"<F12>\n"
 			"<Alt+F12>\n"
@@ -72,6 +73,7 @@ void help_window(mu_Context *ctx) {
 
 		const char *text_r =
 			"Toggle fullscreen\n"
+			"Toggle CPU turbo mode\n"
 			"Eject floppy disk image\n"
 			"Show this help screen\n"
 			"Debug break, if GDB module is loaded\n"
diff --git a/lib/vxt/ppi.c b/lib/vxt/ppi.c
index 633d58b6..3d8e922c 100644
--- a/lib/vxt/ppi.c
+++ b/lib/vxt/ppi.c
@@ -44,7 +44,6 @@ struct ppi {
     vxt_byte xt_switches;
 
     vxt_byte command;
-    vxt_byte refresh_request;
     bool keyboard_enable;
     bool turbo_enabled;
 
@@ -69,7 +68,7 @@ static vxt_byte in(struct ppi *c, vxt_word port) {
             return data;
         }
         case 0x61:
-            return (c->port_61 & 0xEF) | c->refresh_request;
+            return c->port_61;
         case 0x62:
             return (c->port_61 & 8) ? (c->xt_switches >> 4) : (c->xt_switches & 0xF);
         case 0x64: