mirror of
https://github.com/reactos/reactos.git
synced 2024-07-06 12:45:16 +00:00
b20613401f
Rewrite the VGA emulation. Nah, it's a joke! - Store VGA registers setup in VGA_REGISTERS structure. - Improve BiosSetVideoMode and introduce a VgaSetRegisters function for setting VGA regs. - Initialize Bda->CrtBasePort: it is used to determine the address of some I/O ports which depend on whether we are in color or monochrome mode. - Add UnregisterIoPort in io.c (and fix some DPRINTs) (needed for VGA). - When setting the misc. VGA register, check whether we're going to monochrome emulation, and reset some port addresses in that case. svn path=/branches/ntvdm/; revision=61246
107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/*
|
|
* COPYRIGHT: GPL - See COPYING in the top level directory
|
|
* PROJECT: ReactOS Virtual DOS Machine
|
|
* FILE: io.c
|
|
* PURPOSE: I/O Port Handlers
|
|
* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
|
|
* Hermes Belusca-Maito (hermes.belusca@sfr.fr)
|
|
*/
|
|
|
|
/* INCLUDES *******************************************************************/
|
|
|
|
#define NDEBUG
|
|
|
|
#include "emulator.h"
|
|
#include "io.h"
|
|
|
|
/* PRIVATE VARIABLES **********************************************************/
|
|
|
|
typedef struct _EMULATOR_IOPORT_HANDLER
|
|
{
|
|
EMULATOR_IN_PROC In;
|
|
EMULATOR_OUT_PROC Out;
|
|
} EMULATOR_IOPORT_HANDLER, *PEMULATOR_IOPORT_HANDLER;
|
|
|
|
/*
|
|
* This is the list of registered I/O Port handlers.
|
|
*/
|
|
EMULATOR_IOPORT_HANDLER IoPortProc[EMULATOR_MAX_IOPORTS_NUM];
|
|
|
|
/* PUBLIC FUNCTIONS ***********************************************************/
|
|
|
|
VOID WINAPI RegisterIoPort(ULONG Port,
|
|
EMULATOR_IN_PROC InHandler,
|
|
EMULATOR_OUT_PROC OutHandler)
|
|
{
|
|
if (IoPortProc[Port].In == NULL)
|
|
IoPortProc[Port].In = InHandler;
|
|
else
|
|
DPRINT1("IoPortProc[0x%X].In already registered\n", Port);
|
|
|
|
if (IoPortProc[Port].Out == NULL)
|
|
IoPortProc[Port].Out = OutHandler;
|
|
else
|
|
DPRINT1("IoPortProc[0x%X].Out already registered\n", Port);
|
|
}
|
|
|
|
VOID WINAPI UnregisterIoPort(ULONG Port)
|
|
{
|
|
IoPortProc[Port].In = NULL;
|
|
IoPortProc[Port].Out = NULL;
|
|
}
|
|
|
|
VOID WINAPI
|
|
EmulatorReadIo(PFAST486_STATE State,
|
|
ULONG Port,
|
|
PVOID Buffer,
|
|
ULONG DataCount,
|
|
UCHAR DataSize)
|
|
{
|
|
INT i, j;
|
|
LPBYTE Address = (LPBYTE)Buffer;
|
|
|
|
UNREFERENCED_PARAMETER(State);
|
|
|
|
for (i = 0; i < DataCount; i++) for (j = 0; j < DataSize; j++)
|
|
{
|
|
ULONG CurrentPort = Port + j;
|
|
|
|
/* Call the IN Port handler */
|
|
if (IoPortProc[CurrentPort].In != NULL)
|
|
{
|
|
*(Address++) = IoPortProc[CurrentPort].In(CurrentPort);
|
|
}
|
|
else
|
|
{
|
|
DPRINT1("Read from unknown port: 0x%X\n", CurrentPort);
|
|
*(Address++) = 0xFF; // Empty port value
|
|
}
|
|
}
|
|
}
|
|
|
|
VOID WINAPI
|
|
EmulatorWriteIo(PFAST486_STATE State,
|
|
ULONG Port,
|
|
PVOID Buffer,
|
|
ULONG DataCount,
|
|
UCHAR DataSize)
|
|
{
|
|
INT i, j;
|
|
LPBYTE Address = (LPBYTE)Buffer;
|
|
|
|
UNREFERENCED_PARAMETER(State);
|
|
|
|
for (i = 0; i < DataCount; i++) for (j = 0; j < DataSize; j++)
|
|
{
|
|
ULONG CurrentPort = Port + j;
|
|
|
|
/* Call the OUT Port handler */
|
|
if (IoPortProc[CurrentPort].Out != NULL)
|
|
IoPortProc[CurrentPort].Out(CurrentPort, *(Address++));
|
|
else
|
|
DPRINT1("Write to unknown port: 0x%X\n", CurrentPort);
|
|
}
|
|
}
|
|
|
|
/* EOF */
|