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Bob Supnik 701f0fe028 Notes For V2.8 
1. New Features

1.1 Directory and documentation

- Only common files (SCP and libraries) are in the top level
  directory.  Individual simulator files are in their individual
  directories.
- simh_doc.txt has been split up.  simh_doc.txt now documents
  only SCP.  The individual simulators are documented in separate
  text files in their own directories.
- mingw_build.bat is a batch file for the MINGW/gcc environment
  that will build all the simulators, assuming the root directory
  structure is at c:\sim.
- Makefile is a UNIX make file for the gcc environment that will
  build all the simulators, assuming the root directory is at
  c:\sim.

1.2 SCP

- DO <file name> executes the SCP commands in the specified file.
- Replicated registers in unit structures can now be declared as
  arrays for examine, modify, save, and restore.  Most replicated
  unit registers (for example, mag tape position registers) have
  been changed to arrays.
- The ADD/REMOVE commands have been replaced by SET unit ONLINE
  and SET unit OFFLINE, respectively.
- Register names that are unique within an entire simulator do
  not have to be prefaced with the device name.
- The ATTACH command can attach files read only, either under
  user option (-r), or because the attached file is ready only.
- The SET/SHOW capabilities have been extended.  New forms include:

	SET <dev> param{=value}{ param ...}
	SET <unit> param{=value}{ param ...}
	SHOW <dev> {param param ...}
	SHOW <unit> {param param ...}

- Multiple breakpoints have been implemented.  Breakpoints are
  set/cleared/displayed by:

	BREAK addr_list{[count]}
	NOBREAK addr_list
	SHOW BREAK addr_list

1.3 PDP-11 simulator

- Unibus map implemented, with 22b RP controller (URH70) or 18b
  RP controller (URH11) (in debug).
- All DMA peripherals rewritten to use map.
- Many peripherals modified for source sharing with VAX.
- RQDX3 implemented.
- Bugs fixed in RK11 and RL11 write check.

1.4 PDP-10 simulator

- ITS 1-proceed implemented.
- Bugs fixed in ITS PC sampling and LPMR

1.5 18b PDP simulator

- Interrupts split out to multiple levels to allow easier
  expansion.

1.5 IBM System 3 Simulator

- Written by Charles (Dutch) Owen.

1.6 VAX Simulator (in debug)

- Simulates MicroVAX 3800 (KA655) with 16MB-64MB memory, RQDX3,
  RLV12, TSV11, DZV11, LPV11, PCV11.
- CDROM capability has been added to the RQDX3, to allow testing
  with VMS hobbyist images.

1.7 SDS 940 Simulator (not tested)

- Simulates SDS 940, 16K-64K memory, fixed and moving head
  disk, magtape, line printer, console.

1.8 Altair Z80

- Revised from Charles (Dutch) Owen's original by Peter Schorn.
- MITS 8080 with full Z80 simulation.
- 4K and 8K BASIC packages, Prolog package.

1.9 Interdata

The I4 simulator has been withdrawn for major rework.  Look for
a complete 16b/32b Interdata simulator sometime next year.

2. Release Notes

2.1 SCP

SCP now allows replicated registers in unit structures to be
modelled as arrays.  All replicated register declarations have
been replaced by register array declarations.  As a result,
save files from prior revisions will generate errors after
restoring main memory.

2.2 PDP-11

The Unibus map code is in debug.  The map was implemented primarily
to allow source sharing with the VAX, which requires a DMA map.
DMA devices work correctly with the Unibus map disabled.

The RQDX3 simulator has run a complete RSTS/E SYSGEN, with multiple
drives, and booted the completed system from scratch.

2.3 VAX

The VAX simulator will run the boot code up to the >>> prompt.  It
can successfully process a SHOW DEVICE command.  It runs the HCORE
instruction diagnostic.  It can boot the hobbyist CD through SYSBOOT
and through the date/time dialog and restore the hobbyist CD, using
standalone backup.  On the boot of the restored disk, it gets to the
date/time dialog, and then crashes.

2.4 SDS 940

The SDS 940 is untested, awaiting real code.

2.5 GCC Optimization

At -O2 and above, GCC does not correctly compile the simulators which
use setjmp-longjmp (PDP-11, PDP-10, VAX).  A working hypothesis is
that optimized state maintained in registers is being used in the
setjmp processing routine.  On the PDP-11 and PDP-10, all of this
state has been either made global, or volatile, to encourage GCC to
keep the state up to date in memory.  The VAX is still vulnerable.

3. Work list

3.1 SCP

- Better ENABLE/DISABLE.

3.2 PDP-11 RQDX3

Software mapped mode, RCT read simulation, VMS debug.
2011-04-15 08:33:38 -07:00

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/* eclipse_tt.c: Eclipse console terminal simulator
Copyright (c) 1993-1997,
Robert M Supnik, Digital Equipment Corporation
Commercial use prohibited
tti terminal input
tto terminal output
*/
#include "nova_defs.h"
#define UNIT_V_DASHER (UNIT_V_UF + 0) /* Dasher mode */
#define UNIT_DASHER (1 << UNIT_V_DASHER)
extern int32 int_req, dev_busy, dev_done, dev_disable;
t_stat tti_svc (UNIT *uptr);
t_stat tto_svc (UNIT *uptr);
t_stat tti_reset (DEVICE *dptr);
t_stat tto_reset (DEVICE *dptr);
t_stat ttx_setmod (UNIT *uptr, int32 value);
extern t_stat sim_activate (UNIT *uptr, int32 delay);
extern t_stat sim_cancel (UNIT *uptr);
extern t_stat sim_poll_kbd (void);
extern t_stat sim_putchar (int32 out);
/* TTI data structures
tti_dev TTI device descriptor
tti_unit TTI unit descriptor
tti_reg TTI register list
ttx_mod TTI/TTO modifiers list
*/
UNIT tti_unit = { UDATA (&tti_svc, 0, 0), KBD_POLL_WAIT };
REG tti_reg[] = {
{ ORDATA (BUF, tti_unit.buf, 8) },
{ FLDATA (BUSY, dev_busy, INT_V_TTI) },
{ FLDATA (DONE, dev_done, INT_V_TTI) },
{ FLDATA (DISABLE, dev_disable, INT_V_TTI) },
{ FLDATA (INT, int_req, INT_V_TTI) },
{ DRDATA (POS, tti_unit.pos, 31), PV_LEFT },
{ DRDATA (TIME, tti_unit.wait, 24), REG_NZ + PV_LEFT },
{ FLDATA (MODE, tti_unit.flags, UNIT_V_DASHER), REG_HRO },
{ NULL } };
MTAB ttx_mod[] = {
{ UNIT_DASHER, 0, "ANSI", "ANSI", &ttx_setmod },
{ UNIT_DASHER, UNIT_DASHER, "Dasher", "DASHER", &ttx_setmod },
{ 0 } };
DEVICE tti_dev = {
"TTI", &tti_unit, tti_reg, ttx_mod,
1, 10, 31, 1, 8, 8,
NULL, NULL, &tti_reset,
NULL, NULL, NULL };
/* TTO data structures
tto_dev TTO device descriptor
tto_unit TTO unit descriptor
tto_reg TTO register list
*/
UNIT tto_unit = { UDATA (&tto_svc, 0, 0), SERIAL_OUT_WAIT };
REG tto_reg[] = {
{ ORDATA (BUF, tto_unit.buf, 8) },
{ FLDATA (BUSY, dev_busy, INT_V_TTO) },
{ FLDATA (DONE, dev_done, INT_V_TTO) },
{ FLDATA (DISABLE, dev_disable, INT_V_TTO) },
{ FLDATA (INT, int_req, INT_V_TTO) },
{ DRDATA (POS, tto_unit.pos, 31), PV_LEFT },
{ DRDATA (TIME, tto_unit.wait, 24), PV_LEFT },
{ FLDATA (MODE, tto_unit.flags, UNIT_V_DASHER), REG_HRO },
{ NULL } };
DEVICE tto_dev = {
"TTO", &tto_unit, tto_reg, ttx_mod,
1, 10, 31, 1, 8, 8,
NULL, NULL, &tto_reset,
NULL, NULL, NULL };
/* Terminal input: IOT routine */
int32 tti (int32 pulse, int32 code, int32 AC)
{
int32 iodata;
iodata = (code == ioDIA)? tti_unit.buf & 0377: 0;
switch (pulse) { /* decode IR<8:9> */
case iopS: /* start */
dev_busy = dev_busy | INT_TTI; /* set busy */
dev_done = dev_done & ~INT_TTI; /* clear done, int */
int_req = int_req & ~INT_TTI;
break;
case iopC: /* clear */
dev_busy = dev_busy & ~INT_TTI; /* clear busy */
dev_done = dev_done & ~INT_TTI; /* clear done, int */
int_req = int_req & ~INT_TTI;
break; } /* end switch */
return iodata;
}
/* Unit service */
t_stat tti_svc (UNIT *uptr)
{
int32 temp;
sim_activate (&tti_unit, tti_unit.wait); /* continue poll */
if ((temp = sim_poll_kbd ()) < SCPE_KFLAG) return temp; /* no char or error? */
tti_unit.buf = temp & 0177;
/* --- BEGIN MODIFIED CODE --- */
if (tti_unit.flags & UNIT_DASHER) /* translate input */
translate_in();
/* --- END MODIFIED CODE --- */
dev_busy = dev_busy & ~INT_TTI; /* clear busy */
dev_done = dev_done | INT_TTI; /* set done */
int_req = (int_req & ~INT_DEV) | (dev_done & ~dev_disable);
tti_unit.pos = tti_unit.pos + 1;
return SCPE_OK;
}
/* -------------------- BEGIN INSERTION -----------------------*/
int curpos = 0; /* used by translate_out() */
int row = 0, col = 0; /* ditto - for cursor positioning */
int spec200 = 0; /* signals next char is 'special' */
/* Translation: Vt100 input to D200 keycodes. */
int32 translate_in()
{
char rev = 0;
if (tti_unit.buf == '\r')
rev = '\n';
if (tti_unit.buf == '\n')
rev = '\r';
if (rev)
tti_unit.buf = rev;
}
/* -------------------- END INSERTION -----------------------*/
/* Reset routine */
t_stat tti_reset (DEVICE *dptr)
{
tti_unit.buf = 0;
dev_busy = dev_busy & ~INT_TTI; /* clear busy */
dev_done = dev_done & ~INT_TTI; /* clear done, int */
int_req = int_req & ~INT_TTI;
sim_activate (&tti_unit, tti_unit.wait); /* activate unit */
return SCPE_OK;
}
/* Terminal output: IOT routine */
int32 tto (int32 pulse, int32 code, int32 AC)
{
if (code == ioDOA) tto_unit.buf = AC & 0377;
switch (pulse) { /* decode IR<8:9> */
case iopS: /* start */
dev_busy = dev_busy | INT_TTO; /* set busy */
dev_done = dev_done & ~INT_TTO; /* clear done, int */
int_req = int_req & ~INT_TTO;
sim_activate (&tto_unit, tto_unit.wait); /* activate unit */
break;
case iopC: /* clear */
dev_busy = dev_busy & ~INT_TTO; /* clear busy */
dev_done = dev_done & ~INT_TTO; /* clear done, int */
int_req = int_req & ~INT_TTO;
sim_cancel (&tto_unit); /* deactivate unit */
break; } /* end switch */
return 0;
}
/* Unit service */
t_stat tto_svc (UNIT *uptr)
{
int32 c, temp;
dev_busy = dev_busy & ~INT_TTO; /* clear busy */
dev_done = dev_done | INT_TTO; /* set done */
int_req = (int_req & ~INT_DEV) | (dev_done & ~dev_disable);
c = tto_unit.buf & 0177;
/* --- BEGIN MODIFIED CODE --- */
if (tto_unit.flags & UNIT_DASHER) {
if ((temp = translate_out(c)) != SCPE_OK) return temp;
} else {
if ((temp = sim_putchar (c)) != SCPE_OK) return temp;
tto_unit.pos = tto_unit.pos + 1;
}
/* --- END MODIFIED CODE --- */
return SCPE_OK;
}
/* -------------------- BEGIN INSERTION -----------------------*/
/* Translation routine - D200 screen controls to VT-100 controls. */
int32 translate_out(int32 c)
{
int32 temp;
char outstr[32];
if (spec200 == 1) { /* Special terminal control seq */
spec200 = 0;
switch (c) {
case 'C': /* read model ID */
return SCPE_OK;
case 'E': /* Reverse video off */
return SCPE_OK;
case 'D': /* Reverse video on */
return SCPE_OK;
default:
return SCPE_OK;
}
}
if (curpos == 1) { /* 2nd char of cursor position */
col = c & 0x7f;
curpos++;
return (SCPE_OK);
}
if (curpos == 2) { /* 3rd char of cursor position */
row = c & 0x7f;
curpos = 0;
sprintf(outstr, "\033[%d;%dH", row+1, col+1);
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
return (SCPE_OK);
}
switch (c) { /* Single-char command or data */
case 003: /* Blink enable */
break;
case 004: /* Blink disable */
break;
case 005: /* Read cursor address */
break;
case 010: /* Cursor home */
sprintf(outstr, "\033[1;1H");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
row = col = 0;
return (SCPE_OK);
case 012: /* Newline */
if ((temp = sim_putchar('\r')) != SCPE_OK) return temp;
tto_unit.pos += 1;
if ((temp = sim_putchar(c)) != SCPE_OK) return temp;
tto_unit.pos += 1;
col = 1;
row++;
if (row > 24) row = 1;
return (SCPE_OK);
case 013: /* Erase EOL */
sprintf(outstr, "\033[K");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
return (SCPE_OK);
case 014: /* Erase screen */
sprintf(outstr, "\033[1;1H\033[2J");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
row = col = 0;
return (SCPE_OK);
case 015: /* CR */
if ((temp = sim_putchar(c)) != SCPE_OK) return temp;
tto_unit.pos += 1;
col = 1;
return (SCPE_OK);
case 016: /* Blink On */
sprintf(outstr, "\033[5m");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
return (SCPE_OK);
case 017: /* Blink off */
sprintf(outstr, "\033[25m");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
return (SCPE_OK);
case 020: /* Write cursor address */
curpos = 1;
return SCPE_OK;
case 024: /* underscore on */
sprintf(outstr, "\033[4m");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
return (SCPE_OK);
case 025: /* underscore off */
sprintf(outstr, "\033[24m");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
return (SCPE_OK);
break;
case 027: /* cursor up */
sprintf(outstr, "\033[A");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
row--;
if (row < 1) row = 24;
return (SCPE_OK);
case 030: /* cursor right */
sprintf(outstr, "\033[C");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
col++;
if (col > 80) {
col = 1;
row++;
if (row > 24) row = 1;
}
return (SCPE_OK);
case 031: /* Cursor left */
sprintf(outstr, "\033[D");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
tto_unit.pos += 1;
col--;
if (col < 1) {
col = 80;
row--;
if (row < 1) row = 24;
}
return (SCPE_OK);
case 032: /* Cursor down */
sprintf(outstr, "\033[B");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
row++;
if (row > 24) row = 1;
return (SCPE_OK);
case 034: /* Dim on */
sprintf(outstr, "\033[22m");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
return (SCPE_OK);
case 035: /* Dim off */
sprintf(outstr, "\033[1m");
if ((temp = putseq(outstr)) != SCPE_OK) return temp;
return (SCPE_OK);
case 036: /* Special sequence */
spec200 = 1;
return SCPE_OK;
default: /* ..A character of data */
if ((temp = sim_putchar(c)) != SCPE_OK) return temp;
tto_unit.pos += 1;
col++;
if (col > 80) {
col = 1;
row++;
if (row > 24) row = 24;
}
return (SCPE_OK);
}
return SCPE_OK;
}
int32 putseq(char *seq)
{
int i, len, temp;
len = strlen(seq);
for (i = 0; i < len; i++) {
if ((temp = sim_putchar(seq[i])) != SCPE_OK)
return temp;
tto_unit.pos += 1;
}
return SCPE_OK;
}
/* -------------------- END INSERTION -----------------------*/
/* Reset routine */
t_stat tto_reset (DEVICE *dptr)
{
tto_unit.buf = 0;
dev_busy = dev_busy & ~INT_TTO; /* clear busy */
dev_done = dev_done & ~INT_TTO; /* clear done, int */
int_req = int_req & ~INT_TTO;
sim_cancel (&tto_unit); /* deactivate unit */
return SCPE_OK;
}
t_stat ttx_setmod (UNIT *uptr, int32 value)
{
tti_unit.flags = (tti_unit.flags & ~UNIT_DASHER) | value;
tto_unit.flags = (tto_unit.flags & ~UNIT_DASHER) | value;
return SCPE_OK;
}
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