Notes For V3.7-0

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.

sim_defs.h

@@ -23,6 +23,7 @@
    used in advertising or otherwise to promote the sale, use or other dealings
    in this Software without prior written authorization from Robert M Supnik.
 
+   18-Oct-06    RMS     Added limit check for clock synchronized keyboard waits
    13-Jul-06    RMS     Guarantee CBUFSIZE is at least 256
    07-Jan-06    RMS     Added support for breakpoint spaces
                         Added REG_FIT flag
@@ -243,9 +244,12 @@ typedef uint32          t_addr;
 /* Default timing parameters */
 
 #define KBD_POLL_WAIT   5000                            /* keyboard poll */
+#define KBD_MAX_WAIT    500000
 #define SERIAL_IN_WAIT  100                             /* serial in time */
 #define SERIAL_OUT_WAIT 100                             /* serial output */
 #define NOQUEUE_WAIT    10000                           /* min check time */
+#define KBD_LIM_WAIT(x) (((x) > KBD_MAX_WAIT)? KBD_MAX_WAIT: (x))
+#define KBD_WAIT(w,s)   ((w)? w: KBD_LIM_WAIT (s))
 
 /* Convert switch letter to bit mask */