Notes For V3.7

1. New Features

1.1 3.7-0

1.1.1 SCP

- Added SET THROTTLE and SET NOTHROTTLE commands to regulate simulator
  execution rate and host resource utilization.
- Added idle support (based on work by Mark Pizzolato).
- Added -e to control error processing in nested DO commands (from
  Dave Bryan).

1.1.2 HP2100

- Added Double Integer instructions, 1000-F CPU, and Floating Point
  Processor (from Dave Bryan).
- Added 2114 and 2115 CPUs, 12607B and 12578A DMA controllers, and
  21xx binary loader protection (from Dave Bryan).

1.1.3 Interdata

- Added SET IDLE and SET NOIDLE commands to idle the simulator in wait
  state.

1.1.4 PDP-11

- Added SET IDLE and SET NOIDLE commands to idle the simulator in wait
  state (WAIT instruction executed).
- Added TA11/TU60 cassette support.

1.1.5 PDP-8

- Added SET IDLE and SET NOIDLE commands to idle the simulator in wait
  state (keyboard poll loop or jump-to-self).
- Added TA8E/TU60 cassette support.

1.1.6 PDP-1

- Added support for 16-channel sequence break system.
- Added support for PDP-1D extended features and timesharing clock.
- Added support for Type 630 data communications subsystem.

1.1.6 PDP-4/7/9/15

- Added SET IDLE and SET NOIDLE commands to idle the simulator in wait
  state (keyboard poll loop or jump-to-self).

1.1.7 VAX, VAX780

- Added SET IDLE and SET NOIDLE commands to idle the simulator in wait
  state (more than 200 cycles at IPL's 0, 1, or 3 in kernel mode).

1.1.8 PDP-10

- Added SET IDLE and SET NOIDLE commands to idle the simulator in wait
  state (operating system dependent).
- Added CD20 (CD11) support.

2. Bugs Fixed

Please see the revision history on http://simh.trailing-edge.com or
in the source module sim_rev.h.

PDP8/pdp8_ct.c

@@ -1,6 +1,6 @@
 /* pdp8_ct.c: PDP-8 cassette tape simulator
 
-   Copyright (c) 2006, Robert M Supnik
+   Copyright (c) 2006-2007, 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"),
@@ -25,6 +25,8 @@
 
    ct           TA8E/TU60 cassette tape
 
+   30-May-2007  RMS	Fixed typo (from Norm Lastovica)
+
    Magnetic tapes are represented as a series of variable records
    of the form:
 
@@ -461,7 +463,7 @@ int32 srb;
 if (uptr == NULL) {                                     /* unit specified? */
     uptr = ct_busy ();                                  /* use busy unit */
     if ((uptr == NULL) && (ct_sra & SRA_ENAB))          /* none busy? */
-        uptr = uptr = ct_dev.units + GET_UNIT (ct_sra); /* use sel unit */
+        uptr = ct_dev.units + GET_UNIT (ct_sra);        /* use sel unit */
     }
 else if (ct_srb & SRB_EOF) uptr->UST |= UST_GAP;        /* save gap */
 if (uptr) {                                             /* any unit? */