From ba79d132393c88e704e4529d915a22a2fbef1103 Mon Sep 17 00:00:00 2001
From: sorgelig <pour.garbage@gmail.com>
Date: Tue, 4 Aug 2020 05:54:57 +0800
Subject: [PATCH] ao486: 3mbit for high speed UART mode.

---
 support/x86/x86.cpp | 5 +++++
 support/x86/x86.h   | 1 +
 user_io.cpp         | 4 +++-
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/support/x86/x86.cpp b/support/x86/x86.cpp
index 56fa66b..1eaa804 100644
--- a/support/x86/x86.cpp
+++ b/support/x86/x86.cpp
@@ -956,3 +956,8 @@ void x86_set_fdd_boot(uint32_t boot)
 {
 	boot_from_floppy = (boot != 0);
 }
+
+void x86_set_uart_mode(int mode)
+{
+	dma_sdio(mode ? 0x40 : 0x80);
+}
diff --git a/support/x86/x86.h b/support/x86/x86.h
index cc05bba..73343f6 100644
--- a/support/x86/x86.h
+++ b/support/x86/x86.h
@@ -9,5 +9,6 @@ void x86_set_image(int num, char *filename);
 void x86_config_load();
 void x86_config_save();
 void x86_set_fdd_boot(uint32_t boot);
+void x86_set_uart_mode(int mode);
 
 #endif
diff --git a/user_io.cpp b/user_io.cpp
index 0892a0e..2c15ee5 100644
--- a/user_io.cpp
+++ b/user_io.cpp
@@ -567,8 +567,10 @@ int GetUARTMode()
 
 void SetUARTMode(int mode)
 {
+	if (is_x86()) x86_set_uart_mode(mode != 3);
+
 	MakeFile("/tmp/CORENAME", user_io_get_core_name_ex());
-	MakeFile("/tmp/UART_SPEED", is_st() ? "19200" : (is_x86() && (user_io_8bit_set_status(0, 0, 0) & (1 << 10))) ? "1152000" : "115200");
+	MakeFile("/tmp/UART_SPEED", is_st() ? "19200" : (is_x86() && (user_io_8bit_set_status(0, 0, 0) & (1 << 10))) ? "4000000" : "115200");
 
 	char cmd[32];
 	sprintf(cmd, "uartmode %d", mode & 0xFF);