21 Feb
2011
21 Feb
'11
2:46 p.m.
On Mon, Feb 21, 2011 at 1:55 PM, Bill Degnan <billdeg at degnanco.com> wrote:
I have a PDP 11/05 all dressed up and ready to go,
stock config.
Very nice.
Does
anyone have or be willing to make copies PDP 11/05 or 11/10 papetape
programs available? ?(diagnostics, assembler, editor, utilities).
I don't have any papertape software for -11s, but here's a link to
some of what should be out there...
http://www.retrotechnology.com/pdp11/11_20_PTS.html
?I have
an ASR 33 and the computer has 8K core.
Worst case I guess I could toggle in the code, then punch it for use next
time!
If you can get binary file images, it's not hard to locate/buy/build a
20mA-EIA adapter to run your ASR-33 off of a more modern machine -
you'd just need a way to set the serial port to 110 bps and set two
stop bits (i.e., easier with a "real" serial port than with a
USB-serial adapter) - then you could punch your own tapes.
I've seen 20mA-EIA converters built into null-modem-sized packages
(http://en.wikipedia.org/wiki/File:Rscl.jpg), and the original IBM
serial board is easy to use with a 20mA device
http://stason.org/TULARC/pc/pc_pinout.html
RS-232 SERIAL (COM) PC PORT CONNECTOR DB-25
DB-25 PIN (Male) FUNCTION ABBREVIATION
1 ---------------------------- Chassis/Frame Ground GND
2 ------------------------------ Transmitted Data TX or TD
3 -------------------------------- Receive Data RX or RD
4 ------------------------------ Request To Send RTS
5 ------------------------------- Clear To Send CTS
6 ------------------------------- Data Set Ready DSR
7 ------------------------------- Signal Ground GND
8 ---------------------------- Data Carrier Detect DCD or CD
9 ------------------------- Transmit + (Current loop) TD+
11 ------------------------ Transmit - (Current Loop) TD-
18 ------------------------- Receive + (Current Loop) RD+
20 --------------------------- Data Terminal Ready DTR
22 ----------------------------- Ring Indicator RI
25 ------------------------- Receive - (Current Loop) RD-
NOTE!! Current loop technology was supported in the PC and
XT interfaces.
Current loop was discontinued when the AT interface
was introduced.
Transmitted and receive data are referenced from the data
device and not the modem.
What you don't get with the PC interface is the "reader run" circuit
used by DEC consoles (that's why a lot of ASR-33s have a six-wire
cable - transmit loop, receive loop, and RR) - but if you are punching
tapes from a PC, you'll only need the one loop hooked up to your
serial interface.
-ethan
