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/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: dc503.h
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 9/90
*
* Routines for the DEC DC503 Programmable Cursor Chip
*/
#include <platforms.h>
#include <chips/pm_defs.h>
#include <chips/dc503.h>
#if defined(DECSTATION) || defined(VAXSTATION)
typedef struct {
volatile unsigned short pcc_cmdr; /* all regs are wo */
short pad0;
volatile unsigned short pcc_xpos;
short pad1;
volatile unsigned short pcc_ypos;
short pad2;
volatile unsigned short pcc_xmin1;
short pad3;
volatile unsigned short pcc_xmax1;
short pad4;
volatile unsigned short pcc_ymin1;
short pad5;
volatile unsigned short pcc_ymax1;
short pad6[9];
volatile unsigned short pcc_xmin2;
short pad7;
volatile unsigned short pcc_xmax2;
short pad8;
volatile unsigned short pcc_ymin2;
short pad9;
volatile unsigned short pcc_ymax2;
short pad10;
volatile unsigned short pcc_memory;
short pad11;
} dc503_padded_regmap_t;
#else
typedef dc503_regmap_t dc503_padded_regmap_t;
#endif
#ifdef VAXSTATION
#define X_CSHIFT 216
#define Y_CSHIFT 34
#define wbflush()
#define PCC_STATE (DC503_CMD_ENPA | DC503_CMD_ENPB | DC503_CMD_HSHI)
#endif /*VAXSTATION*/
/* defaults, for the innocents */
#ifndef X_CSHIFT
#define X_CSHIFT 212
#define Y_CSHIFT 34
#define PCC_STATE (DC503_CMD_ENPA | DC503_CMD_ENPB)
#endif
/*
* Cursor
*/
dc503_pos_cursor( regs, x, y)
dc503_padded_regmap_t *regs;
{
regs->pcc_xpos = x + X_CSHIFT;
regs->pcc_ypos = y + Y_CSHIFT;
wbflush();
}
dc503_load_cursor( pm, cursor)
pm_softc_t *pm;
unsigned short *cursor;
{
dc503_padded_regmap_t *regs;
register int i;
regs = (dc503_padded_regmap_t*)pm->cursor_registers;
pm->cursor_state |= DC503_CMD_LODSA;
regs->pcc_cmdr = pm->cursor_state;
wbflush();
for (i = 0; i < 32; i++) {
regs->pcc_memory = *cursor++;
wbflush();
}
pm->cursor_state &= ~DC503_CMD_LODSA;
regs->pcc_cmdr = pm->cursor_state;
}
unsigned short dc503_default_cursor[16+16] = {
/* Plane A */
0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff,
0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff,
/* Plane B */
0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff,
0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff
};
/*
* Vert retrace interrupt
*/
dc503_vretrace( pm, on)
pm_softc_t *pm;
{
if (on)
pm->cursor_state |= DC503_CMD_ENRG2;
else
pm->cursor_state &= ~DC503_CMD_ENRG2;
((dc503_padded_regmap_t*)pm->cursor_registers)->pcc_cmdr = pm->cursor_state;
}
/*
* Video on/off
*/
dc503_video_on( pm, up)
pm_softc_t *pm;
{
pm->cursor_state = DC503_CMD_ENPA | (pm->cursor_state & ~DC503_CMD_FOPB);
((dc503_padded_regmap_t*)pm->cursor_registers)->pcc_cmdr = pm->cursor_state;
}
dc503_video_off( pm, up)
pm_softc_t *pm;
{
pm->cursor_state = DC503_CMD_FOPB | (pm->cursor_state & ~DC503_CMD_ENPA);
((dc503_padded_regmap_t*)pm->cursor_registers)->pcc_cmdr = pm->cursor_state;
}
/*
* Initialization
*/
dc503_init( pm )
pm_softc_t *pm;
{
dc503_padded_regmap_t *regs;
regs = (dc503_padded_regmap_t*)pm->cursor_registers;
dc503_load_cursor( pm, dc503_default_cursor);
dc503_pos_cursor( regs, 0, 0); /* XXX off screen */
regs->pcc_xmin1 = 0; /* test only */
regs->pcc_xmax1 = 0;
regs->pcc_ymin1 = 0;
regs->pcc_ymax1 = 0;
regs->pcc_xmin2 = 212; /* vert retrace detector */
regs->pcc_xmax2 = 212+1023;
regs->pcc_ymin2 = 34+863;
regs->pcc_ymax2 = 34+863;
#if 0
regs->pcc_cmdr = DC503_CMD_FOPB | DC503_CMD_VBHI;/* reset */
#endif
pm->cursor_state = PCC_STATE;
regs->pcc_cmdr = pm->cursor_state;
}
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