13 Nov
2018
13 Nov
'18
2:02 p.m.
On 11/13/2018 03:46 PM, Ethan Dicks via cctalk wrote:
On Sat, Nov 24, 2012 at 4:08 AM Eric Smith <eric at
brouhaha.com> wrote:
Is Opcode #10 the "Enter
MRSP Mode" or is that something else?
-ethan
Same here,
I asked while I was at DEC and the designer said need a special rig to
do that and the important
things was EOT and BOToptical sensors and the code with the basic
patterns.? The TU58 does not
have an EOT or BOT sensor as it detects end marks on the tape.
I think using disassembled code and adding the sensors its possible to
put down the marks needed.
Never explored it fully to prove that.? It was easier to make a
RAM-based TU58 work alike and at
least one company did a floppy based TU58 work alike.
Allison
It is
remotely possible that there's an undocumented "format" command
in the protocol. However, I've heard multiple people claim that
special firmware was required.
I spent some time reverse-engineering the firmware.
There is only one
undocumented opcode, decimal 10, and I haven't yet figured out what it
does, but it definitely doesn't format a tape.