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os-k/kaleid/kernel/io/cursor.c

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//----------------------------------------------------------------------------//
// GNU GPL OS/K //
// //
// Desc: Cursor-related functions //
// //
// //
// Copyright © 2018-2019 The OS/K Team //
// //
// This file is part of OS/K. //
// //
// OS/K is free software: you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation, either version 3 of the License, or //
// any later version. //
// //
// OS/K is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY//without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
//----------------------------------------------------------------------------//
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#include <init/boot.h>
#include <io/cursor.h>
void IoEnableCursor(void)
{
IoWriteByteOnPort(0x3D4, 0xA);
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IoWriteByteOnPort(0x3D5, (IoReadByteFromPort(0x3D5) & 0xC0) | 14);
IoWriteByteOnPort(0x3D4, 0xB);
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IoWriteByteOnPort(0x3D5, (IoReadByteFromPort(0x3D5) & 0xE0) | 15);
}
void IoDisableCursor(void)
{
IoWriteByteOnPort(0x3D4, 0x0A);
IoWriteByteOnPort(0x3D5, 0x20);
}
void IoUpdateCursor(int x, int y)
{
const ushort pos = y * BtVideoInfo.framebufferWidth + x;
IoWriteByteOnPort(0x3D4, 0x0F);
IoWriteByteOnPort(0x3D5, (pos & 0xFF));
IoWriteByteOnPort(0x3D4, 0x0E);
IoWriteByteOnPort(0x3D5, ((pos >> 8) & 0xFF));
}