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/* vga.h -- Definition of types and structures for Richard's VGA/LCD controler.

   Copyright (C) 2002 Marko Mlinar, markom@opencores.org

NOTE: device is only partially implemented!

This file is part of OpenRISC 1000 Architectural Simulator.

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., 675 Mass Ave, Cambridge, MA 02139, USA. */

#ifndef _VGA_H_

#define _VGA_H_

#define VGA_CTRL        0x00       /* Control Register */

#define VGA_STAT        0x04       /* Status Register */

#define VGA_HTIM        0x08       /* Horizontal Timing Register */

#define VGA_VTIM        0x0c       /* Vertical Timing Register */

#define VGA_HVLEN       0x10       /* Horizontal and Vertical Length Register */

#define VGA_VBARA       0x14       /* Video Memory Base Address Register A */

#define VGA_VBARB       0x18       /* Video Memory Base Address Register B */

#define VGA_CLUTA       0x800

#define VGA_CLUTB       0xc00

#define VGA_MASK        0xfff

#define VGA_ADDR_SPACE  1024    

/* List of implemented registers; all other are ignored.  */

/* Control Register */

#define VGA_CTRL_VEN    0x00000001 /* Video Enable */

#define VGA_CTRL_CD     0x00000300 /* Color Depth */

#define VGA_CTRL_PC     0x00000400 /* Pseudo Color */

/* Status Register */

/* Horiz. Timing Register */

/* Vert. Timing Register */

/* Horiz. and Vert. Length Register */

/* Reset all VGAs */

void vga_reset ();

#endif /* _VGA_H_ */