20 May
2014
20 May
'14
2:15 p.m.
On 5/20/2014 1:25 PM, Marco Rauhut wrote:
Hello together,
the restoration of my PDP-8 and TU56 going forward. Many PDP 8 machine
tests are OK. The TU56 come slowly back to life.
My current problem is, that i do not own a ASR33. Or is it no Problem?
I testet the M8655 with the echo and printer test like in the smal
computers handbook described. All is working fine. I see readable
characters in cutecom on my linux desktop. With the cutecom i also
send the binloader and the testprograms to the PDP8. There i have no
problems too. But... some maindec testsoftware is doing printouts on
the Teletype witch i canot read on cutecom. Exactly the same happens,
if i bootstrap software witch come on tape with the tapedrive.
Exampe hexdump of the output from software on tape (generated with
cutecom):
00000000: 00 ff bf b0 b0 ae b0 b0 20 c0 20 b1 b1 ae b3 b0
00000010: 20 8d 8a aa aa c7 8d 8a 8d 8a 8d 8a 8d 8a c4 c5
00000020: c3 d4 c1 d0 c5 a0 d3 d9 d3 d4 c5 cd a0 c4 d4 a3
00000030: b4 8d 8a 8d 8a c2 c9 ce c1 d2 d9 a0 cd cf ce c9
Is there an existing software witch can act like a ASR33 for typing
and printing , or i got to write my own ?
Many thanks to all who help me again and again.....
Marco Rauhut
PDP-8 console output typically was done with bit7 set to a 1; thus hex
0x0A (octal 012) is sent as hex 0x8A (octal 212) for 'LF'.
If you set your terminal program to '7 bit' data mode (instead of '8
bit') you should see standard ascii characters.
Of course, if you are also downloading programs thru the console line
(like reading a tape on the ASR-33) you need to go back to 8bit mode.
Don