[HECnet] Ersatz-11 V7.1

[John Wilson]

V7.1 of Ersatz-11 is done.   New features include:

- DMP11/DMV11 network ports.

- DDCMP over TCP and UDP (as well as serial lines).

- Kermit client for transferring files in and out of the PDP-11 over any
  emulated serial line (KERMIT command and KERMIT: pseudo-driver).

- "MOUNT ddcu: BAD: /LIST:badblks.txt ..." adds fake bad blocks (from a
  list in a file) to any disk (for testing PDP-11 utilities).

- "MOUNT ddcu: ... {/NOPAD | /PAD:NULL | /PAD:RAM}" selects how to handle
  emulating disks with an image file (or physical drive) that's smaller
  than the drive being emulated.   (/PAD:RAM is currently an experimental
  feature and may have bugs -- it's intended for systems that use the tail
  end of the drive as swap space.)

- DPDISK: and DPTAPE: (BOTH UNSUPPORTED) set up dual-ported disks and tapes.
  Any disk or tape type can be mounted on one of these pseudo-devices, after
  which units 0 and 1 of the pseudo-device represent the two ports which may
  in turn each be mounted on different PDP-11 controllers, presumably on
  different processors of a multi-processor system.

- "SET TTu: DL11A" (needed by DOS/BATCH for TT0:).

- "SET PCLOG n" enlarges the number of logged PC values that can be shown
  with SHOW PCLOG.

- New native "SYS" utilities for Linux, OS/2, and Windows, for making disks
  (or flash drives) boot the stand-alone version of E11.   The Linux and
  Windows versions try to notice if a drive (e.g. USB flash card that came
  pre-partitioned) hasn't been made "active" and/or is missing the MBR
  bootstrap, and fixes it (may require privs).   If anyone can please tell
  me what sys calls in OS/2 will find out which physical drive owns a FAT
  volume given the drive letter, I'd appreciate it!

- The stand-alone version's bootstrap supports USB drives (including flash).
  Also there's a bootable CD, but since there's currently no ATAPI dev
  driver or ISO9660 FS driver, it can't install E11 onto a hard drive, and
  it requires a FAT volume to hold .DSK files etc.   So it's more of a proof
  of concept than something useful (but it's an easy way to try out the
  stand-alone version of E11).

Bug fixes and tweaks as usual (sorry about that .TAP seeking thing in V7.0!).

As usual, the Demo version can be downloaded from:

	http://www.dbit.com/demo.html

John Wilson
D Bit