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/* vga.h -- Definition of types and structures for VGA/LCD
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/* vga.h -- Definition of types and structures for Richard's VGA/LCD controler.
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Copyright (C) 2001 Marko Mlinar, markom@opencores.org
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Copyright (C) 2002 Marko Mlinar, markom@opencores.org
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NOTE: device is only partially implemented!
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This file is part of OpenRISC 1000 Architectural Simulator.
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This file is part of OpenRISC 1000 Architectural Simulator.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifndef _VGA_H_
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#define _VGA_H_
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#define VGA_CTRL 0x00 /* Control Register */
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#define VGA_STAT 0x04 /* Status Register */
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#define VGA_HTIM 0x08 /* Horizontal Timing Register */
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#define VGA_VTIM 0x0c /* Vertical Timing Register */
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#define VGA_HVLEN 0x10 /* Horizontal and Vertical Length Register */
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#define VGA_VBARA 0x14 /* Video Memory Base Address Register A */
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#define VGA_VBARB 0x18 /* Video Memory Base Address Register B */
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#define VGA_CLUTA 0x800
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#define VGA_CLUTB 0xc00
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#define VGA_MASK 0xfff
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#define VGA_ADDR_SPACE 1024
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/* List of implemented registers; all other are ignored. */
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/* Control Register */
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#define VGA_CTRL_VEN 0x00000001 /* Video Enable */
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#define VGA_CTRL_CD 0x00000300 /* Color Depth */
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#define VGA_CTRL_PC 0x00000400 /* Pseudo Color */
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/* Status Register */
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/* Horiz. Timing Register */
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/* Vert. Timing Register */
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/* Horiz. and Vert. Length Register */
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/* Reset all VGAs */
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void vga_reset ();
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/* Handles one VGA clock */
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void vga_clock ();
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#endif /* _VGA_H_ */
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