11 Apr
2007
11 Apr
'07
10:31 p.m.
Allison wrote:
To boot a floppy under RT-11 is fairly easy. You will
need a bootable
disk, That is a copy of RT-11 with the bootdevice you plan to use configured.
It also must have the hard disk driver as well and basic utilities. RT-11
fits on small devices (even tu58 256kB).
FYI: an option is to use TU-58 emulator on a PC and a serial line to
a PDP-11 as a fairly straight forward way to get stuff on a an -11
with blank media. At the extreme the DD boot can be hand entered
into uODT as its something like 30 words long. I know I used to boot
a romless 11/23 that way.
Jerome Fine replies:
David has an RX33 drive which can use HD 1.2 MB floppies
from a PC. They each hold 2400 blocks, so the TU-58 is
not really needed.
A TU-58 certainly can't hurt, but if it takes any time
to set up, the RX33 is already working. Also, the TU-58
takes more time to boot that manually entering in the
boot program (well not the emulated TU-58 since that
runs as fast as the PC behind it and the file on the
hard disk of the PC)!. But I once had a project that
used a real DEC TU-58. Not the fastest "random"
access device!!!!!!!!!!!!!!!!!!
Sincerely yours,
Jerome Fine
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