28 Sep
2020
28 Sep
'20
6:03 a.m.
don't know how that board uses the SD card, in terms of where it keeps the
RL02 image, but if you can find that out, SD<->USB3 adaptors are cheap and
plentiful, and it shouldn't be too hard to load the disk image into it
using
one of them. (For the QSIC, I found a 'dd' for Winsdoze and used that to
write
the disk image onto the SD card.)
Here's how the formatting of the SD card is done. First you partition the
disk
into n 'FAT 12" partitions, one for each drive you wish to connect.
Then you pop the card in the emulator board, and run a utility which
formats the partitions as "Linux" and you then have n 10.5MB Linux
partitions. Putting the card back into your host machine, you then copy
your RL02 disk images to the newly formatted Linux partitions.
Here's the full explanation:
https://www.5volts.ch/pages/rlv12/rlv12-createdisk/
I don't
have any PROMs other than what would be on the '03 or '23+
boards now.
Not a problem: if you hook up the -11's console to another computer, you
can download a bootstrap into it over the serial line, using the -11's ODT.
Speaking of booting, I have Mini-Uix booting under an
-11/05 simulator
(Ersatz-11); I used the RK image from here:
Thanks again.
Oh, I recently realized how to make a bit more room
on an -11/03: most
DEC small QBUS memory cards allow you to use half the 'I/O page' for
memory,
Sounds beyond me, and not necessary at this stage.
What kind of memory card(s) do you have for the
-11/03?
The 256kB card is:
M8067-KA MSV11-PK 256-kbyte MOS memory with parity CSR
I'll keep that for the '23+.
Can you clarify something for me regarding memory? I understand the bottom
area of memory in a Unix system is for the Kernel and it's stuff, and that
the top 8kB is set aside for device I/O (with the exceptions you mentioned
in a previous email about using some of that space). The LSI-11 board has
4kW of RAM on it, and I have already a 16KW board. If I want to further
expand the RAM, and say I buy another 16kW board, that makes an arithmetic
sum of 32kW for the boards, making 36kW total. Can the 4kW of on-board RAM
be disabled, and only the 32kW on the boards be used? Is it ok for the
installed RA mto overlap the 8kW at the high memory area? Do the devices
spoof these addresses or do they read/write in the high installed RAM area?
Paul