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/*************************************************************************
* *
* $Id: tx0_dpy.c 2060 2009-02-24 06:49:07Z hharte $ *
* *
* Copyright (c) 2009-2012, Howard M. Harte *
* Copyright (c) 2004, Philip L. Budne *
* Copyright (c) 1993-2003, Robert M. Supnik *
* *
* Permission is hereby granted, free of charge, to any person obtaining *
* a copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, sublicense, and/or sell copies of the Software, and to *
* permit persons to whom the Software is furnished to do so, subject to *
* the following conditions: *
* *
* The above copyright notice and this permission notice shall be *
* included in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, *
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND *
* NONINFRINGEMENT. IN NO EVENT SHALL HOWARD M. HARTE BE LIABLE FOR ANY *
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, *
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE *
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name of Howard M. Harte shall *
* not be used in advertising or otherwise to promote the sale, use or *
* other dealings in this Software without prior written authorization *
* of Howard M. Harte. *
* *
* Module Description: *
* TX-0 display simulator *
* *
* Environment: *
* User mode only *
* *
*************************************************************************/
#ifdef USE_DISPLAY
#include "tx0_defs.h"
#include "display/display.h"
extern int32 ios, iosta, PF;
extern int32 stop_inst;
extern int32 PEN_HIT;
t_stat dpy_svc (UNIT *uptr);
t_stat dpy_reset (DEVICE *dptr);
/* DPY data structures
dpy_dev DPY device descriptor
dpy_unit DPY unit
dpy_reg DPY register list
*/
#define CYCLE_TIME 5 /* 5us memory cycle */
#define DPY_WAIT (50/CYCLE_TIME) /* 50us */
UNIT dpy_unit = {
UDATA (&dpy_svc, UNIT_ATTABLE, 0), DPY_WAIT };
DEVICE dpy_dev = {
"DPY", &dpy_unit, NULL, NULL,
1, 10, 31, 1, 8, 8,
NULL, NULL, &dpy_reset,
NULL, NULL, NULL,
NULL, DEV_DISABLE };
/* Display Routine */
int32 dpy (int32 ac)
{
int32 pen_hit;
int32 x, y;
int level;
if (dpy_dev.flags & DEV_DIS) /* disabled? */
return SCPE_UDIS;
x = (ac >> 9) & 0777; /* X = high nine bits of AC */
y = (ac & 0777); /* Y = low nine bits of AC */
/*
* convert one's complement -255..+255 center origin
* to 0..511 (lower left origin)
*/
if (x & 0400)
x ^= 0400;
else
x += 255;
if (y & 0400)
y ^= 0400;
else
y += 255;
level = DISPLAY_INT_MAX; /* Maximum intensity */
if (display_point(x,y,level,0)) {
/* here with light pen hit */
PF = PF | 010; /* set prog flag 3 */
pen_hit = 1;
} else {
pen_hit = 0;
}
sim_activate (&dpy_unit, dpy_unit.wait); /* activate */
return pen_hit;
}
/*
* Unit service routine
*
* Under X11 this includes polling for events, so it can't be
* call TOO infrequently...
*/
t_stat dpy_svc (UNIT *uptr)
{
display_age(dpy_unit.wait*CYCLE_TIME, 1);
sim_activate (&dpy_unit, dpy_unit.wait); /* requeue! */
return SCPE_OK;
}
/* Reset routine */
t_stat dpy_reset (DEVICE *dptr)
{
display_init(DIS_TX0, RES_FULL);
display_reset();
iosta = iosta & ~(IOS_PNT | IOS_SPC); /* clear flags */
sim_cancel (&dpy_unit); /* deactivate unit */
return SCPE_OK;
}
#else /* USE_DISPLAY not defined */
char tx0_dpy_unused; /* sometimes empty object modules cause problems */
#endif /* USE_DISPLAY not defined */