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/*
* VBMouse - Interface to the Windows int 2Fh services
* Copyright (C) 2022 Javier S. Pedro
*
* This program 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 2
* of the License, or (at your option) any later version.
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef INT2FWIN_H
#define INT2FWIN_H
#include <stdbool.h>
#include <stdint.h>
#include <dos.h>
typedef _Packed struct win386_instance_item
{
void __far * ptr;
uint16_t size;
} win386_instance_item;
typedef _Packed struct win386_startup_info
{
uint16_t version;
struct win386_startup_info __far * next;
char __far * device_driver;
void __far * device_driver_data;
struct win386_instance_item __far * instance_data;
} win386_startup_info;
typedef void (__far *LPFN)(void);
enum int2f_functions
{
/** Notification sent when Windows386 is starting up. */
INT2F_NOTIFY_WIN386_STARTUP = 0x1605,
/** Notification sent by a VxD that wants to invoke a function in a real-mode driver. */
INT2F_NOTIFY_DEVICE_CALLOUT = 0x1607,
INT2F_NOTIFY_BACKGROUND_SWITCH = 0x4001,
INT2F_NOTIFY_FOREGROUND_SWITCH = 0x4002
};
enum vxd_device_ids
{
VMD_DEVICE_ID = 0xC
};
static bool windows_386_enhanced_mode(void);
#pragma aux windows_386_enhanced_mode = \
"mov ax, 0x1600" \
"int 0x2F" \
"test al, 0x7F" /* return value is either 0x80 or 0x00 if win386 is not running */ \
"setnz al" \
__value [al] \
__modify [ax]
static LPFN win_get_vxd_api_entry(uint16_t devid);
#pragma aux win_get_vxd_api_entry = \
"mov ax, 0x1684" /* Get Device Entry Point Address */ \
"int 0x2F" \
__parm [bx] \
__value [es di] \
__modify [ax]
/* VMD (Virtual Mouse Device) API */
enum vmd_apis {
VMD_GET_VERSION = 0x0,
VMD_SET_MOUSE_TYPE = 0x100,
};
enum vmd_callouts
{
/** VMD emits this to know if there is a "win386 aware" DOS mouse driver installed.
* If there is, and the driver responds with CX!=0, VMD will assume
* the driver is taking care of its own instancing
* (which we do, through win386_startup_info)
* and not try to hack around our internals. */
VMD_CALLOUT_TEST = 0,
/** VMD emits this to know the entrypoint for the API of a "win386 aware"
* DOS mouse driver. */
VMD_CALLOUT_GET_DOS_MOUSE_API = 0x1
};
enum vmd_dos_mouse_api_actions
{
VMD_ACTION_MOUSE_EVENT = 1,
VMD_ACTION_HIDE_CURSOR = 2,
VMD_ACTION_SHOW_CURSOR = 3
};
enum vmd_mouse_type {
VMD_TYPE_UNDEFINED = 0,
VMD_TYPE_BUS = 1,
VMD_TYPE_SERIAL = 2,
VMD_TYPE_INPORT = 3,
VMD_TYPE_PS2 = 4,
VMD_TYPE_HP = 5
};
static inline int vmd_get_version(LPFN *vmd_entry);
#pragma aux vmd_get_version = \
"mov ax, 0x000" \
"call dword ptr es:[di]" \
__parm [es di] \
__value [ax]
static inline bool vmd_set_mouse_type(LPFN *vmd_entry, uint8_t mousetype, int8_t interrupt, int8_t com_port);
#pragma aux vmd_set_mouse_type = \
"stc" /* If nothing happens, assume failure */ \
"mov ax, 0x100" \
"call dword ptr es:[di]" \
"setnc al" \
__parm [es di] [bl] [bh] [cl] \
__value [al] \
__modify [ax]
/* Miscelaneous helpers. */
static inline void hook_int2f(LPFN *prev, LPFN new)
{
*prev = _dos_getvect(0x2F);
_dos_setvect(0x2F, new);
}
static inline void unhook_int2f(LPFN prev)
{
_dos_setvect(0x2F, prev);
}
#endif
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