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Diffstat (limited to 'chips/dc503.c')
| -rw-r--r-- | chips/dc503.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/chips/dc503.c b/chips/dc503.c new file mode 100644 index 00000000..8bfab509 --- /dev/null +++ b/chips/dc503.c @@ -0,0 +1,189 @@ +/* + * 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; +} |