115 lines
3.9 KiB
C
115 lines
3.9 KiB
C
/* nova_lp.c: NOVA line printer simulator
|
||
|
||
Copyright (c) 1993-2001, 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
|
||
ROBERT M SUPNIK 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 Robert M Supnik shall not
|
||
be used in advertising or otherwise to promote the sale, use or other dealings
|
||
in this Software without prior written authorization from Robert M Supnik.
|
||
|
||
lpt line printer
|
||
*/
|
||
|
||
#include "nova_defs.h"
|
||
|
||
extern int32 int_req, dev_busy, dev_done, dev_disable;
|
||
int32 lpt_stopioe = 0; /* stop on error */
|
||
t_stat lpt_svc (UNIT *uptr);
|
||
t_stat lpt_reset (DEVICE *dptr);
|
||
|
||
/* LPT data structures
|
||
|
||
lpt_dev LPT device descriptor
|
||
lpt_unit LPT unit descriptor
|
||
lpt_reg LPT register list
|
||
*/
|
||
|
||
UNIT lpt_unit = {
|
||
UDATA (&lpt_svc, UNIT_SEQ+UNIT_ATTABLE, 0), SERIAL_OUT_WAIT };
|
||
|
||
REG lpt_reg[] = {
|
||
{ ORDATA (BUF, lpt_unit.buf, 8) },
|
||
{ FLDATA (BUSY, dev_busy, INT_V_LPT) },
|
||
{ FLDATA (DONE, dev_done, INT_V_LPT) },
|
||
{ FLDATA (DISABLE, dev_disable, INT_V_LPT) },
|
||
{ FLDATA (INT, int_req, INT_V_LPT) },
|
||
{ DRDATA (POS, lpt_unit.pos, 31), PV_LEFT },
|
||
{ DRDATA (TIME, lpt_unit.wait, 24), PV_LEFT },
|
||
{ FLDATA (STOP_IOE, lpt_stopioe, 0) },
|
||
{ NULL } };
|
||
|
||
DEVICE lpt_dev = {
|
||
"LPT", &lpt_unit, lpt_reg, NULL,
|
||
1, 10, 31, 1, 8, 8,
|
||
NULL, NULL, &lpt_reset,
|
||
NULL, NULL, NULL };
|
||
|
||
/* IOT routine */
|
||
|
||
int32 lpt (int32 pulse, int32 code, int32 AC)
|
||
{
|
||
|
||
if (code == ioDOA) lpt_unit.buf = AC & 0177;
|
||
switch (pulse) { /* decode IR<8:9> */
|
||
case iopS: /* start */
|
||
dev_busy = dev_busy | INT_LPT; /* set busy */
|
||
dev_done = dev_done & ~INT_LPT; /* clear done, int */
|
||
int_req = int_req & ~INT_LPT;
|
||
if ((lpt_unit.buf != 015) && (lpt_unit.buf != 014) &&
|
||
(lpt_unit.buf != 012))
|
||
return (lpt_svc (&lpt_unit) << IOT_V_REASON);
|
||
sim_activate (&lpt_unit, lpt_unit.wait);
|
||
break;
|
||
case iopC: /* clear */
|
||
dev_busy = dev_busy & ~INT_LPT; /* clear busy */
|
||
dev_done = dev_done & ~INT_LPT; /* clear done, int */
|
||
int_req = int_req & ~INT_LPT;
|
||
sim_cancel (&lpt_unit); /* deactivate unit */
|
||
break; } /* end switch */
|
||
return 0;
|
||
}
|
||
|
||
/* Unit service */
|
||
|
||
t_stat lpt_svc (UNIT *uptr)
|
||
{
|
||
dev_busy = dev_busy & ~INT_LPT; /* clear busy */
|
||
dev_done = dev_done | INT_LPT; /* set done */
|
||
int_req = (int_req & ~INT_DEV) | (dev_done & ~dev_disable);
|
||
if ((lpt_unit.flags & UNIT_ATT) == 0) /* attached? */
|
||
return IORETURN (lpt_stopioe, SCPE_UNATT);
|
||
if (putc (lpt_unit.buf, lpt_unit.fileref) == EOF) {
|
||
perror ("LPT I/O error");
|
||
clearerr (lpt_unit.fileref);
|
||
return SCPE_IOERR; }
|
||
lpt_unit.pos = ftell (lpt_unit.fileref);
|
||
return SCPE_OK;
|
||
}
|
||
|
||
/* Reset routine */
|
||
|
||
t_stat lpt_reset (DEVICE *dptr)
|
||
{
|
||
lpt_unit.buf = 0;
|
||
dev_busy = dev_busy & ~INT_LPT; /* clear busy */
|
||
dev_done = dev_done & ~INT_LPT; /* clear done, int */
|
||
int_req = int_req & ~INT_LPT;
|
||
sim_cancel (&lpt_unit); /* deactivate unit */
|
||
return SCPE_OK;
|
||
}
|