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/* hp2100_lpt.c: HP 2100 12845B line printer simulator
Copyright (c) 1993-2008, 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 12845B 2607 line printer
26-Jun-08 JDB Rewrote device I/O to model backplane signals
Changed CTIME register width to match documentation
22-Jan-07 RMS Added UNIT_TEXT flag
28-Dec-06 JDB Added ioCRS state to I/O decoders
19-Nov-04 JDB Added restart when set online, etc.
29-Sep-04 JDB Added SET OFFLINE/ONLINE, POWEROFF/POWERON
Fixed status returns for error conditions
Fixed TOF handling so form remains on line 0
03-Jun-04 RMS Fixed timing (found by Dave Bryan)
26-Apr-04 RMS Fixed SFS x,C and SFC x,C
Implemented DMA SRQ (follows FLG)
25-Apr-03 RMS Revised for extended file support
24-Oct-02 RMS Cloned from 12653A
Reference:
- 12845A Line Printer Operating and Service Manual (12845-90001, Aug-1972)
The 2607 provides three status bits via the interface:
bit 15 -- printer ready (online)
bit 14 -- paper out
bit 0 -- printer idle
The expected status returns are:
140001 -- power off or cable disconnected
100001 -- power on, paper loaded, printer ready
100000 -- power on, paper loaded, printer busy
040000 -- power on, paper out (at bottom-of-form)
000000 -- power on, paper out (not at BOF) / print button up / platen open
Manual Note: "2-33. PAPER OUT SIGNAL. [...] The signal is asserted only
when the format tape in the line printer has reached the bottom of form."
These simulator commands provide the listed printer states:
SET LPT POWEROFF --> power off or cable disconnected
SET LPT POWERON --> power on
SET LPT OFFLINE --> print button up
SET LPT ONLINE --> print button down
ATT LPT <file> --> paper loaded
DET LPT --> paper out
*/
#include "hp2100_defs.h"
#define LPT_PAGELNT 60 /* page length */
#define LPT_NBSY 0000001 /* not busy */
#define LPT_PAPO 0040000 /* paper out */
#define LPT_RDY 0100000 /* ready */
#define LPT_PWROFF LPT_RDY | LPT_PAPO | LPT_NBSY /* power-off status */
#define LPT_CTL 0100000 /* control output */
#define LPT_CHAN 0000100 /* skip to chan */
#define LPT_SKIPM 0000077 /* line count mask */
#define LPT_CHANM 0000007 /* channel mask */
#define UNIT_V_POWEROFF (UNIT_V_UF + 0) /* unit powered off */
#define UNIT_V_OFFLINE (UNIT_V_UF + 1) /* unit offline */
#define UNIT_POWEROFF (1 << UNIT_V_POWEROFF)
#define UNIT_OFFLINE (1 << UNIT_V_OFFLINE)
FLIP_FLOP lpt_control = CLEAR;
FLIP_FLOP lpt_flag = CLEAR;
FLIP_FLOP lpt_flagbuf = CLEAR;
int32 lpt_ctime = 4; /* char time */
int32 lpt_ptime = 10000; /* print time */
int32 lpt_stopioe = 0; /* stop on error */
int32 lpt_lcnt = 0; /* line count */
static int32 lpt_cct[8] = {
1, 1, 1, 2, 3, LPT_PAGELNT/2, LPT_PAGELNT/4, LPT_PAGELNT/6
};
DEVICE lpt_dev;
uint32 lptio (uint32 select_code, IOSIG signal, uint32 data);
t_stat lpt_svc (UNIT *uptr);
t_stat lpt_reset (DEVICE *dptr);
t_stat lpt_restart (UNIT *uptr, int32 value, char *cptr, void *desc);
t_stat lpt_attach (UNIT *uptr, char *cptr);
/* LPT data structures
lpt_dev LPT device descriptor
lpt_unit LPT unit descriptor
lpt_reg LPT register list
*/
DIB lpt_dib = { LPT, &lptio };
UNIT lpt_unit = {
UDATA (&lpt_svc, UNIT_SEQ+UNIT_ATTABLE+UNIT_DISABLE+UNIT_TEXT, 0)
};
REG lpt_reg[] = {
{ ORDATA (BUF, lpt_unit.buf, 7) },
{ FLDATA (CTL, lpt_control, 0) },
{ FLDATA (FLG, lpt_flag, 0) },
{ FLDATA (FBF, lpt_flagbuf, 0) },
{ DRDATA (LCNT, lpt_lcnt, 7) },
{ DRDATA (POS, lpt_unit.pos, T_ADDR_W), PV_LEFT },
{ DRDATA (CTIME, lpt_ctime, 24), PV_LEFT },
{ DRDATA (PTIME, lpt_ptime, 24), PV_LEFT },
{ FLDATA (STOP_IOE, lpt_stopioe, 0) },
{ ORDATA (DEVNO, lpt_dib.devno, 6), REG_HRO },
{ NULL }
};
MTAB lpt_mod[] = {
{ UNIT_POWEROFF, UNIT_POWEROFF, "power off", "POWEROFF", NULL },
{ UNIT_POWEROFF, 0, "power on", "POWERON", lpt_restart },
{ UNIT_OFFLINE, UNIT_OFFLINE, "offline", "OFFLINE", NULL },
{ UNIT_OFFLINE, 0, "online", "ONLINE", lpt_restart },
{ MTAB_XTD | MTAB_VDV, 0, "DEVNO", "DEVNO",
&hp_setdev, &hp_showdev, &lpt_dev },
{ 0 }
};
DEVICE lpt_dev = {
"LPT", &lpt_unit, lpt_reg, lpt_mod,
1, 10, 31, 1, 8, 8,
NULL, NULL, &lpt_reset,
NULL, &lpt_attach, NULL,
&lpt_dib, DEV_DISABLE
};
/* I/O signal handler */
uint32 lptio (uint32 select_code, IOSIG signal, uint32 data)
{
const IOSIG base_signal = IOBASE (signal); /* derive base signal */
switch (base_signal) { /* dispatch base I/O signal */
case ioCLF: /* clear flag flip-flop */
lpt_flag = lpt_flagbuf = CLEAR;
break;
case ioSTF: /* set flag flip-flop */
case ioENF: /* enable flag */
lpt_flag = lpt_flagbuf = SET;
break;
case ioSFC: /* skip if flag is clear */
setstdSKF (lpt);
break;
case ioSFS: /* skip if flag is set */
setstdSKF (lpt);
break;
case ioIOI: /* I/O data input */
if (lpt_unit.flags & UNIT_POWEROFF) /* power off? */
data = LPT_PWROFF;
else if (!(lpt_unit.flags & UNIT_OFFLINE)) { /* online? */
if (lpt_unit.flags & UNIT_ATT) { /* paper loaded? */
data = LPT_RDY;
if (!sim_is_active (&lpt_unit)) /* printer busy? */
data = data | LPT_NBSY;
}
else if (lpt_lcnt == LPT_PAGELNT - 1) /* paper out, at BOF? */
data = LPT_PAPO;
}
else
data = 0;
break;
case ioIOO: /* I/O data output */
lpt_unit.buf = data & (LPT_CTL | 0177);
break;
case ioPOPIO: /* power-on preset to I/O */
lpt_flag = lpt_flagbuf = SET; /* set flag and flag buffer */
lpt_unit.buf = 0; /* clear output buffer */
/* fall into CRS handler */
case ioCRS: /* control reset */
/* fall into CLC handler */
case ioCLC: /* clear control flip-flop */
lpt_control = CLEAR;
break;
case ioSTC: /* set control flip-flop */
lpt_control = SET;
sim_activate (&lpt_unit, /* schedule op */
(lpt_unit.buf & LPT_CTL)? lpt_ptime: lpt_ctime);
break;
case ioSIR: /* set interrupt request */
setstdPRL (select_code, lpt); /* set standard PRL signal */
setstdIRQ (select_code, lpt); /* set standard IRQ signal */
setstdSRQ (select_code, lpt); /* set standard SRQ signal */
break;
case ioIAK: /* interrupt acknowledge */
lpt_flagbuf = CLEAR;
break;
default: /* all other signals */
break; /* are ignored */
}
if (signal > ioCLF) /* multiple signals? */
lptio (select_code, ioCLF, 0); /* issue CLF */
else if (signal > ioSIR) /* signal affected interrupt status? */
lptio (select_code, ioSIR, 0); /* set interrupt request */
return data;
}
/* Unit service */
t_stat lpt_svc (UNIT *uptr)
{
int32 i, skip, chan;
if ((uptr->flags & UNIT_ATT) == 0) /* attached? */
return IORETURN (lpt_stopioe, SCPE_UNATT);
else if (uptr->flags & UNIT_OFFLINE) /* offline? */
return IORETURN (lpt_stopioe, STOP_OFFLINE);
else if (uptr->flags & UNIT_POWEROFF) /* powered off? */
return IORETURN (lpt_stopioe, STOP_PWROFF);
lptio (lpt_dib.devno, ioENF, 0); /* set flag */
if (uptr->buf & LPT_CTL) { /* control word? */
if (uptr->buf & LPT_CHAN) {
chan = uptr->buf & LPT_CHANM;
if (chan == 0) { /* top of form? */
fputc ('\f', uptr->fileref); /* ffeed */
lpt_lcnt = 0; /* reset line cnt */
skip = 0;
}
else if (chan == 1) skip = LPT_PAGELNT - lpt_lcnt - 1;
else skip = lpt_cct[chan] - (lpt_lcnt % lpt_cct[chan]);
}
else {
skip = uptr->buf & LPT_SKIPM;
if (skip == 0) fputc ('\r', uptr->fileref);
}
for (i = 0; i < skip; i++) fputc ('\n', uptr->fileref);
lpt_lcnt = (lpt_lcnt + skip) % LPT_PAGELNT;
}
else fputc (uptr->buf & 0177, uptr->fileref); /* no, just add char */
if (ferror (uptr->fileref)) {
perror ("LPT I/O error");
clearerr (uptr->fileref);
return SCPE_IOERR;
}
lpt_unit.pos = ftell (uptr->fileref); /* update pos */
return SCPE_OK;
}
/* Reset routine */
t_stat lpt_reset (DEVICE *dptr)
{
lptio (lpt_dib.devno, ioPOPIO, 0); /* send POPIO signal */
sim_cancel (&lpt_unit); /* deactivate unit */
return SCPE_OK;
}
/* Restart I/O routine
If I/O is started via STC, and the printer is powered off, offline,
or out of paper, the CTL and CMD flip-flops will set, a service event
will be scheduled, and the service routine will be entered. If
STOP_IOE is not set, the I/O operation will "hang" at that point
until the printer is powered on, set online, or paper is supplied
(attached).
If a pending operation is "hung" when this routine is called, it is
restarted, which clears CTL and sets FBF and FLG, completing the
original I/O request.
*/
t_stat lpt_restart (UNIT *uptr, int32 value, char *cptr, void *desc)
{
if (lpt_control && !sim_is_active (uptr))
sim_activate (uptr, 0); /* reschedule I/O */
return SCPE_OK;
}
/* Attach routine */
t_stat lpt_attach (UNIT *uptr, char *cptr)
{
lpt_lcnt = 0; /* top of form */
lpt_restart (uptr, 0, NULL, NULL); /* restart I/O if hung */
return attach_unit (uptr, cptr);
}