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/*
*
* Copyright (C) 1994, Paul S. LaFollette, Jr. This software may be used,
* modified, copied, distributed, and sold, in both source and binary form
* provided that the above copyright and these terms are retained. Under
* no circumstances is the author responsible for the proper functioning
* of this software, nor does the author assume any responsibility
* for damages incurred with its use
*
* $Id: ctxreg.h,v 1.1 1994/10/01 17:59:42 davidg Exp $
*/
/*
* Register and bit definitions for CORTEX-I frame grabber
*/
#ifndef _I386_ISA_CTXREG_H_
#define _I386_ISA_CTXREG_H_
/* Control Ports (all are write-only) */
#define ctx_cp0 0 /* offset to control port 0 */
#define ctx_cp1 1 /* offset to control port 1 */
#define ctx_lutaddr 2 /* offset to lut address port */
#define ctx_lutdata 3 /* offset to lut data port */
/* Status port (read-only but same address as control port 0) */
#define ctx_status 0 /* offset to status port */
/* Bit assignments for control port 0 */
#define PAGE_SELECT0 1 /* These two bits choose which 1/4 of the */
#define PAGE_SELECT1 2 /* video memory is accessible to us. */
#define PAGE_ROTATE 4 /* 0 => horizontal access. 1 => vertical */
#define ACQUIRE 8 /* set to start frame grab */
#define SEE_STORED_VIDEO 16 /* set to allow stored frame to be seen */
#define LOW_RESOLUTION 32 /* set to enable 256 x 256 mode */
/* Bit assignments for control port 1 */
#define INTERRUPT_ENABLE 1 /* Allow interrupts (we avoid this bit) */
#define TRIGGER_ENABLE 2 /* Enable external trigger for frame grab */
#define LUT_LOAD_ENABLE 4 /* Allow loading of lookup table */
#define BLANK_DISPLAY 8 /* Turn off display */
#define AB_SELECT 16 /* Along with HW switch, choose base memory */
#define RAM_ENABLE 32 /* Connect video RAM to computer bus */
/* Bit assignments for status port */
#define INTERRUPT_STATUS 1 /* Ignored by us */
#define ADC_OVERFLOW 2 /* Set if any pixes from camera "too bright"*/
#define FIELD 4 /* 0 or 1 shows which interlace field are in*/
#define VERTICAL_BLANK 8 /* 1 if in vertical blanking interval */
#define TRIGGERED 16 /* 1 if HW trigger contacts closed */
#define ACQUIRING_ACK 32 /* 1 if currently grabbing a frame */
#endif /* ifndef _I386_ISA_CTXREG_H_ */
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