Notes For V3.0-0

Because some key files have changed, V3.0 should be unzipped to a
clean directory.

1. New Features in 3.0-0

1.1 SCP and Libraries

- Added ASSIGN/DEASSIGN (logical name) commands.
- Changed RESTORE to unconditionally detach files.
- Added E11 and TPC format support to magtape library.
- Fixed bug in SHOW CONNECTIONS.
- Added USE_ADDR64 support

1.2 All magtapes

- Magtapes support SIMH format, E11 format, and TPC format (read only).
- SET <tape_unit> FORMAT=format sets the specified tape unit's format.
- SHOW <tape_unit> FORMAT displays the specified tape unit's format.
- Tape format can also be set as part of the ATTACH command, using
  the -F switch.

1.3 VAX

- VAX can be compiled without USE_INT64.
- If compiled with USE_INT64 and USE_ADDR64, RQ and TQ controllers support
  files > 2GB.
- VAX ROM has speed control (SET ROM DELAY/NODELAY).

2. Bugs Fixed in 3.01-0

2.1 VAX

- Fixed CVTfi bug: integer overflow not set if exponent out of range
- Fixed EMODx bugs:
  o First and second operands reversed
  o Separated fraction received wrong exponent
  o Overflow calculation on separated integer incorrect
  o Fraction not set to zero if exponent out of range
- Fixed interval timer and ROM access to pass power-up self-test even on very
  fast host processors (fixes from Mark Pizzolato).

2.2 1401

- Fixed mnemonic, instruction lengths, and reverse scan length check bug for MCS.
- Fixed MCE bug, BS off by 1 if zero suppress.
- Fixed chaining bug, D lost if return to SCP.
- Fixed H branch, branch occurs after continue.
- Added check for invalid 8 character MCW, LCA.
- Fixed magtape load-mode end of record response.

2.3 Nova

- Fixed DSK variable size interaction with restore.

2.4 PDP-1

- Fixed DT variable size interaction with restore.

2.5 PDP-11

- Fixed DT variable size interaction with restore.
- Fixed bug in MMR1 update (found by Tim Stark).
- Added XQ features and fixed bugs:
  o Corrected XQ interrupts on IE state transition (code by Tom Evans).
  o Added XQ interrupt clear on soft reset.
  o Removed XQ interrupt when setting XL or RL (multiple people).
  o Added SET/SHOW XQ STATS.
  o Added SHOW XQ FILTERS.
  o Added ability to split received packet into multiple buffers.
  o Added explicit runt and giant packet processing.

2.6 PDP-18B

- Fixed DT, RF variable size interaction with restore.
- Fixed MT bug in MTTR.

2.7 PDP-8

- Fixed DT, DF, RF, RX variable size interaction with restore.
- Fixed MT bug in SKTR.

2.8 HP2100

- Fixed bug in DP (13210A controller only), DQ read status.
- Fixed bug in DP, DQ seek complete.

2.9 GRI

- Fixed bug in SC queue pointer management.

3. New Features in 3.0 vs prior releases

N/A

4. Bugs Fixed in 3.0 vs prior releases

N/A

5. General Notes

WARNING: The RESTORE command has changed.  RESTORE will now
detach an attached file on a unit, if that unit did not have
an attached file in the saved configuration.  This is required
to assure that the unit flags and the file state are consistent.

WARNING: The compilation scheme for the PDP-10, PDP-11, and VAX
has changed.  Use one of the supplied build files, or read the
documentation carefully, before compiling any of these simulators.

GRI/gri_cpu.c

@@ -1,6 +1,6 @@
 /* gri_cpu.c: GRI-909 CPU simulator
 
-   Copyright (c) 2001-2002, Robert M. Supnik
+   Copyright (c) 2001-2003, 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"),
@@ -23,6 +23,10 @@
    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.
 
+   cpu		GRI-909 CPU
+
+   14-Mar-03	RMS	Fixed bug in SC queue tracking
+
    The system state for the GRI-909 is:
 
    AX<0:15>		arithmetic input
@@ -167,6 +171,7 @@ uint32 stop_opr = 1;					/* stop ill operator */
 int16 scq[SCQ_SIZE] = { 0 };				/* PC queue */
 int32 scq_p = 0;					/* PC queue ptr */
 REG *scq_r = NULL;					/* PC queue reg ptr */
+
 extern int32 sim_interval;
 extern int32 sim_int_char;
 extern int32 sim_brk_types, sim_brk_dflt, sim_brk_summ;	/* breakpoint info */
@@ -340,7 +345,7 @@ REG cpu_reg[] = {
 	{ FLDATA (ION, dev_done, INT_V_ON) },
 	{ FLDATA (INODEF, dev_done, INT_V_NODEF) },
 	{ FLDATA (BKP, bkp, 0) },
-	{ BRDATA (SCQ, scq, 8, 15, SCQ_SIZE), REG_RO+REG_CIRC },
+	{ BRDATA (SCQ, scq, 8, 15, SCQ_SIZE), REG_RO + REG_CIRC },
 	{ ORDATA (SCQP, scq_p, 6), REG_HRO },
 	{ FLDATA (STOP_OPR, stop_opr, 0) },
 	{ ORDATA (WRU, sim_int_char, 8) },
@@ -475,7 +480,7 @@ else if ((src != U_MEM) && (dst != U_MEM)) {		/* reg-reg? */
 /* Memory reference.  The second SC increment occurs after the first
    execution cycle.  For direct, defer, and immediate defer, this is
    after the first memory read and before the bus transfer; but for
-   immediate, it is before the bus transfer.
+   immediate, it is after the bus transfer.
 */
 
 else {	SC = (SC + 1) & AMASK;				/* incr SC */
@@ -512,6 +517,7 @@ else {	SC = (SC + 1) & AMASK;				/* incr SC */
 /* Simulation halted */
 
 AO = ao_update ();					/* update AO */
+scq_r->qptr = scq_p;					/* update sc q ptr */
 return reason;
 }
 
@@ -871,7 +877,7 @@ return SCPE_OK;
 t_stat cpu_set_size (UNIT *uptr, int32 val, char *cptr, void *desc)
 {
 int32 mc = 0;
-t_addr i;
+uint32 i;
 
 if ((val <= 0) || (val > MAXMEMSIZE) || ((val & 07777) != 0))
 	return SCPE_ARG;