The B5500 simulator supports the following peripherals.
Two CPUs with between 4K and 32K of memory. The second CPU can be
enabled with "set cpu1 enable". "set cpu1 disable" disables the
second CPU.
Up to 4 floating IO channels. Individual channels can be enabled with
"set io# enable", or "set io# disable".
There are two card readers. The second reader is disabled by default.
There is one Card Punch.
The Card reader and Card Punch support the following options:
set cr format=
auto - will automatically determine the format based on the
text it recieves.
text Text based cards. Tabs are converted to the correct
number of spaces. A record of
~raw octal will enter a binary card.
~eor will enter a 7/8/9 punch in column 1.
~eof will enter a 6/7/9 punch in column 1.
~eoi will enter a 6/7/8/9 punch in column 1.
~~ will enter a ~ as the first character.
bin Binary Card format:
Each record 160 characters.
First characters 6789----
Second character 21012345
111
Top 4 bits of second character are 0.
It is unlikely that any other format could
look like this.
bcd BCD Format:
Each record variable length (80 chars or less).
Record mark has bit 7 set.
Bit 6 is even parity.
Bits 5-0 are character.
cbn CBN Format:
Each record 160 charaters.
First char has bit 7 set. Rest set to 0.
Bit 6 is odd parity.
Bit 5-0 of first character are top 6 bits
of card.
Bit 5-0 of second character are lower 6 bits
of card.
For punch format of auto if the card can't be converted to text it is
output as a raw record.
There are two line printers, the second one is disabled by default. The LP
supports the option "set lp# linesperpage=#" which determines when the
printer will force out a page break.
There are up to 16 mag tape drives, the format is controlled by the standard
simh format control for tapes. These are 6 bit tapes, 1 character per record
with parity. Units 8-16 are disabled by default.
There are up to two drum units DR0 and DR1. These can either be attached
to a file or set to AUXMEM. Setting to AUXMEM causes them to exist only
during the given simh run. Setting back to DRUM will clear whatever was
stored on the drum. To enable use of DRUM on XV the following options should
be turned on "DRA,DRB,CODEOLAY,DATAOLAY". MCP will then use the drum as a
overlay device instead of the disk system.
Disks can be attached to the various ESU's, ESU0-9 are on DKA by default,
ESU10-19 are on DKB. If "set dk1 dfx" is set, then ESU10-19 are not used and
the disks are shared by both DKA and DKB. To use more then 10 ESU's in a non
shared mode, a new version of MCP must be created. MCP must be compiled with
DFX option set to false. For MCP XV DKBNODFX must also be set to true. ESU units
can be set to MODI or MODIB. MODIB will double the size of the drive.
The DTC can be attached to a telnet port with "attach dtc #" to enable dialup
access to the sim.
The loader card for the card reader is:
~raw0104441100204231524012004000004444550211002041317700000000000024045303040243
00050000006501004131011041310055005500000062005042310000006600304231000000720010
42310000007675610165001002310010413100040107202500440106202533554061256520252265
20251765202514655355536117650000004401062025155522610165225572610465044101160500
4131
This card should be all in one line.
Device probe logic when running VAXELN was unable to correctly initialize
the XQ device when it was set to be a DELQA or DELQA-T, but worked when
it was a DEQNA or a DELQA/DELQA-T in DEQNALock mode. Problem
initially reported in #271
Both VT11 and VS60 properly autoconfigure on the PDP11.
PDP11 now runs Lunar Lander on all SDL supported platforms.
Reworked refresh logic to not require internal delays in the display library
In the event that there are no active clock devices, no instruction
rate calibration will be performed. This is more likely on simpler
simulators which don't have a full spectrum of standard devices or
possibly when a clock device exists but its use is optional and thus
sometimes it may be disabled.
To promote clarity of experience, a user on a telnet connected line (which
supports modem control signaling) will receive a "Disconnected from
{simulator name}" message when a session is explicitly terminated by the
simulated system. This allows the user to differentiate that case from the
simulator merely being powered off or otherwise crashing. This behavior
mirrors the "Connected to the {simulator name}" message that is presented
when the connection is established.
If a driver sets up a receive buffer descriptor list as a circular ring, the
potential exists for a burst of arriving packets to wrap around the receive
buffer ring in a single round of input processing. This is avoided by
stopping list processing when a full circle has been observed.
Additionally, debug output has been added to display issues while
processing both the receive buffer descriptor list and the transmit buffer
descriptor list. The debug bit names are RBDL and XBDL respectively.
PDP11 network boot ROM of the DEQNA, DELQA, and DELQA-T along with
the MicroVAX I ROM boot each expect particular behavior from the XQ
device. Prior efforts to get the PDP11 boot working added several device
specific complications to the receive buffer processing. These are now
simplified. Meanwhile, the generic device 'work alike' boot process has
been implemented to provide an XQ (device independent) primary
loader which extracts the first 512 bytes of the device internal boot
ROM and passes control to it for a complete boot.
Dynamically configured devices simulate multiple controllers with a single DEVICE structure and can have the number of controllers being simulated set by the user. DLI, DZ, DUP, DMC, TDC, VH, DC are all dynamically configured devices.
DLI and TDC are dynamically configured devices which get static bus addresses.
When an auto configuration table entry contains multiple devices be sure
to account for earlier devices which may be disabled while allocating fixed
address and vector values. Examples: XQ, XQB, RB, RQB, RQC, RQD, RX, RY
This problem is discussed in #263
If a TPC format tape image has garbage at the end of the image, but the
image contains multiple successive tape marks, then assume that logical
End Of Tape is immediately after the last successive tape marks.
