85 lines
1.6 KiB
C
85 lines
1.6 KiB
C
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/*++
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Copyright (c) 1993 Weitek Corporation
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Module Name:
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viper.h
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Abstract:
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This module contains definitions for the Diamond Viper VL board.
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Environment:
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Kernel mode
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Revision History may be found at the end of this file.
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--*/
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//
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// Viper uses the same DAC addresses as the Weitek VL cards.
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//
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extern VIDEO_ACCESS_RANGE VLDefDACRegRange[];
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//
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// Default memory base address for the Viper.
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//
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#define MemBase 0x80000000
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//
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// Bit to write to the sequencer control register to enable/disable P9
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// video output.
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//
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#define P9_VIDEO_ENB 0x10
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#define P9_VIDEO_DIS ~P9_VIDEO_ENB
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//
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// Define the bits in the sequencer control register which determine
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// H and V sync polarties. For Viper, 1 = negative.
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//
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#define HSYNC_POL_MASK 0x20
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#define VSYNC_POL_MASK 0x40
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#define POL_MASK (HSYNC_POL_MASK | VSYNC_POL_MASK)
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//
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// Bit to in the sequencer control register to enable VGA output
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// for the Viper board.
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//
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#define VGA_VIDEO_ENB 0x80
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#define VGA_VIDEO_DIS ~VGA_VIDEO_ENB
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//
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// These defines represents the values to be written to the
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// VGA sequencer control register for the possible memory mappings for
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// the Diamond Viper board. Whew!
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//
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#define MEM_DISABLED 0x00
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#define MEM_AXXX 0x01
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#define MEM_2XXX 0x02
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#define MEM_8XXX 0x03
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//
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// Value to mask off the memory address select bits in the sequencer
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// control register.
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//
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#define ADDR_SLCT_MASK ~0x03
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//
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// Defines used to scan the VGA ROM in order to auto-detect a Viper card.
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//
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#define VIPER_VL_ID_STR "VIPER"
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#define VIPER_ID_STR "VIPER"
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#define VGA_BIOS_ADDR 0xC0000L
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#define VGA_BIOS_LEN 0x8000L
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