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.

Ibm1130/ibm1130_cpu.c

@@ -15,6 +15,7 @@
    10-May-02 BLK	Fixed bug in MDX instruction
    27-Mar-02 BLK	Made BOSC work even in short form
    16-Aug-02 BLK	Fixed bug in multiply instruction; didn't work with negative values
+   18-Mar-03 BLK	Fixed bug in divide instruction; didn't work with negative values
 
    The register state for the IBM 1130 CPU is:
 
@@ -883,7 +884,7 @@ t_stat sim_instr (void)
 				break;
 
 			case 0x11:						/* --- AD - Add Double --- */
-				src  = ((ACC << 16) + (EXT & 0xFFFF));
+				src  = ((ACC << 16) | (EXT & 0xFFFF));
 				src2 = (ReadW(eaddr) << 16) + ReadW(eaddr|1);
 				dst  = src + src2;
 				ACC  = (dst >> 16) & 0xFFFF;
@@ -905,7 +906,7 @@ t_stat sim_instr (void)
 				break;
 
 			case 0x13:						/* --- SD - Subtract Double	--- */
-				src  = ((ACC << 16) + (EXT & 0xFFFF));
+				src  = ((ACC << 16) | (EXT & 0xFFFF));
 				src2 = (ReadW(eaddr) << 16) + ReadW(eaddr|1);
 				dst  = src - src2;
 				ACC  = (dst >> 16) & 0xFFFF;
@@ -918,9 +919,9 @@ t_stat sim_instr (void)
 
 			case 0x14:						/* --- M - Multiply	--- */
 				if ((src = ACC & 0xFFFF)  & 0x8000)		/* sign extend the values */
-					src	 |= 0xFFFF0000;
+					src	 |= ~0xFFFF;
 				if ((src2 = ReadW(eaddr)) & 0x8000)
-					src2 |= 0xFFFF0000;
+					src2 |= ~0xFFFF;
 
 				dst = src * src2;
 				ACC = (dst >> 16) & 0xFFFF;				/* split the results */
@@ -928,8 +929,10 @@ t_stat sim_instr (void)
 				break;
 
 			case 0x15:						/* --- D - Divide --- */
-				src  = ((ACC << 16) + EXT);
-				src2 = ReadW(eaddr);
+				src  = ((ACC << 16) | (EXT & 0xFFFF));
+				if ((src2 = ReadW(eaddr)) & 0x8000)
+					src2 |= ~0xFFFF;		/* oops: sign extend was missing, fixed 18Mar03 */
+
 				if (src2 == 0)
 					V = 1;					/* divide by zero just sets overflow, ACC & EXT are undefined */
 				else {
@@ -1251,7 +1254,7 @@ void xio_error (char *msg)
  * register_cmd - add a command to the extensible command table
  * ------------------------------------------------------------------------ */
 
-t_stat register_cmd (char *name, t_stat (*action)(), int arg, char *help)
+t_stat register_cmd (char *name, t_stat (*action)(int32, char *), int arg, char *help)
 {
 	int i;