I've always wanted to own a minicomputer, at least, ever since I learned wh=
at a minicomputer was in my computer architecture class. Something about t=
he user interface was wonderfully refreshing, of course all we had was SIMH=
, which is awesome in its own right, but wasn't the same. Anyway, last mon=
th I was finally able to pick up a minicomputer (I could afford) off eBay, =
the HP 1000E/2113E.
Nice! The HP1000 is one familty of machines I've not found yet.
Annoyingly I'vealomst got one 3 times in my life, every time I lost out :-(
It looks like the original system peripherals are very few and far between,=
and when they do show up for sale, they are astronomically priced. My pla=
n is to put together a system with whatever inexpensive contemporaneous par=
ts I can find, regardless of how sacrilegious it is.
I got a hold of two mostly working DEC RL02 disk drives, along with a SCSI =
9-track tape drive, and my (pipe) dream is to interface this all to the HP =
using an FPGA and HP True In/Out card (i.e. HP Bizarro-Bus to TTL converter=
Personally I see nothing wrong with projects like this, provided you make
no permanent changes to the cvhassic machines. Something that plugs into
an I/O conencotr, or a new PCB that goes into an expansion slot seems ot
be a very reasoanble thing to do.
But personally I prefer to use the sort of technology that was around
when the machine was current. So I wouldn't use FPGAs (there are otehr
reasons why I detest these devices oto...) For me it would eb a rack of
PCBs stuffed with SSI/MSI chips :-)
). As for software, I'm looking towards writing a
backend for GCC (underst=
atement x1000) and running FreeRTOS (because I'm familiar with it, I don't =
need runtime application loading, and I'm going to need to write drivers an=
I've not looked, but is there anything useful on http://www.hpmuseum.net/
At this point my question is, has anybody tried something like this before =
and succeeded (or not)? Are there any helpful lessons to be imparted about=
the HP 1000 or RL02s or working on this type of project in general? I thi=
The RL is a bit strange.. A few thigns I rmeemebr from when I repaied a
The 'energiser clock must be present and the right frequency all the
time. Even the motor speed uses it as a reference.
To do a seek you send the _offest_ -- how many cylinders to move,not the
absolute cylidner number. This is different from just about every other
14" demountable drive I've seen
Be carefu lwith wrtie gate timing. I _think_ the drive hardware prevents
you from overwriting the servo bursts, but you get a fatal error if you
try. Best nto to risk it though.