On 1/14/21 7:55 PM, Fred Cisin wrote:
> You are right. At the time, it simply never occured to me that anybody
> would use it for anything other than matrix processing of scientific data.
> (MY view of the elephant)
The vector thing did strange things to your thinking. Any scalar
instruction wa
On Thu, Jan 14, 2021 at 07:55:52PM -0800, Fred Cisin via cctalk wrote:
> Yes, I suppose that somebody of sufficient skill COULD write
> accounting software with it, . . .
> But why?
When I was living outside Dallas around 1988 or so, I knew a woman who
had a job-for-life with an insurance company
On Thu, 14 Jan 2021, Chuck Guzis via cctalk wrote:
It's a different world from BASIC, for sure.
Neil maintained that its strength lay in thinking about things in a
non-scalar way. I'll give him that--programming on STAR, where a scalar
was treated by the hardware as a vector of length 1 (and th
On 1/14/21 6:42 PM, Fred Cisin via cctalk wrote:
> APL was terse.
>
> You could do amazing things with very short source code.
> Extremely well suited for scientific programming.
> (I used it on a timesharing terminal at Goddard Space Flight Center half
> a century ago)
>
> It had a lot of operat
I should point out that, as far as I know, you can't use the floppy and
hard disk emulation of the DREM-2 at the same time; it's one or the other.
--Bjoren
On 1/14/2021 8:59 PM, Cameron Kaiser via cctalk wrote:
I've successfully used a DREM-2 (https://www.drem.info/) with my Pro 380
for both f
APL was terse.
On Fri, 15 Jan 2021, Mark Linimon wrote:
That's a nice way of saying "It was a write-only language".
Even back when my brain still worked 100% I could only remember what
the code I had just written actually _did_ for 24-48 hours. After
that it was easier to rewrite from scratch.
On 1/14/2021 8:59 PM, Cameron Kaiser via cctalk wrote:
I've successfully used a DREM-2 (https://www.drem.info/) with my Pro 380
for both floppy and hard disk emulation.
Cool! I just bought one of the G thingies ($30 on Amazon), will try
loading up the modified firmware and see if it works. J
On Thu, Jan 14, 2021 at 06:42:34PM -0800, Fred Cisin via cctalk wrote:
> APL was terse.
That's a nice way of saying "It was a write-only language".
Even back when my brain still worked 100% I could only remember what
the code I had just written actually _did_ for 24-48 hours. After
that it was e
APL was terse.
You could do amazing things with very short source code.
Extremely well suited for scientific programming.
(I used it on a timesharing terminal at Goddard Space Flight Center half a
century ago)
It had a lot of operators. So much so that it had to expand the character
set. Ty
I remember colleagues competing for the most 'interesting' one-liner in APL
that actually did something useful, in university.
I wrote several different kinds of simulator, one of which generated APL code
on the fly that was then executed... plus a database-or-two.
I've been actively collecting
On 1/14/21 5:44 PM, Paul Koning via cctalk wrote:
> I was just poking around the computerhistory.org website, searching for Knuth
> stuff.
>
> The second or third hit when I search for "Knuth" is this one:
> https://computerhistory.org/blog/the-apl-programming-language-source-code/ .
> It's no
> > I've successfully used a DREM-2 (https://www.drem.info/) with my Pro 380
> > for both floppy and hard disk emulation.
>
> Cool! I just bought one of the G thingies ($30 on Amazon), will try
> loading up the modified firmware and see if it works. Just easier than
> making an endless pile of f
I was just poking around the computerhistory.org website, searching for Knuth
stuff.
The second or third hit when I search for "Knuth" is this one:
https://computerhistory.org/blog/the-apl-programming-language-source-code/ .
It's not just about APL, it actually has a downloadable copy of the s
On Thu, Jan 14, 2021 at 3:53 PM Chris Zach via cctalk
wrote:
> So does a 380 support programs in split I/D? If not I need to start
> hacking it to do so as 64k limits are for the birds...
The Pro380 has a J-11 chip. It should support Split I&D just fine on
any OS that knows about it. The real t
Cool! I just bought one of the G thingies ($30 on Amazon), will try
loading up the modified firmware and see if it works. Just easier than
making an endless pile of floppies I will only use once or twice (I
already have the whole POS 2.0 set).
So does a 380 support programs in split I/D? If no
I've successfully used a DREM-2 (https://www.drem.info/) with my Pro 380
for both floppy and hard disk emulation.
--Bjoren
On 1/14/2021 2:14 PM, Bill Gunshannon via cctalk wrote:
On 1/14/21 1:52 PM, Paul Koning via cctalk wrote:
On Jan 14, 2021, at 1:42 PM, Chris Zach wrote:
...
Is there
The books I offered last week have all been spoken for.
Van Snyder
van.sny...@sbcglobal.net
On 1/14/21 1:52 PM, Paul Koning via cctalk wrote:
On Jan 14, 2021, at 1:42 PM, Chris Zach wrote:
...
Is there a hardware emulator that can emulate RX50's from images to a Pro? Been
wondering that...
Perhaps David Gesswein's MFM emulator could be modified to do that. You might
ask him.
torsdag 14 januari 2021 skrev Paul Koning via cctalk :
>
>
> > On Jan 14, 2021, at 1:42 PM, Chris Zach wrote:
> >
> > ...
> > Is there a hardware emulator that can emulate RX50's from images to a
> Pro? Been wondering that...
As far as the releasnotes tell FlashFloppy by Keir Fraser support RX
> On Jan 14, 2021, at 1:42 PM, Chris Zach wrote:
>
> ...
> Is there a hardware emulator that can emulate RX50's from images to a Pro?
> Been wondering that...
Perhaps David Gesswein's MFM emulator could be modified to do that. You might
ask him. I don't think it does so out of the box, th
Hm. I did not know this, although the RMD process does show SY1: as well
as SY0: so it makes sense.
I'll have to try that. The power supply in the Pro is somewhat limited,
wonder if you set the drives up to power up in sequence if it would hold.
Longer term Pro project for me is to figure out
I'll give that a try, thanks Chris.
The hardware supports multiple drives just fine (one per controller). The
power supply shuts down with three hard drives, though, the surge current is
too high. I could work around that if I ever needed two. Two drives is not a
problem, and my RSTS code su
Hm. I remember that POS 2.0 and above would just format the hard disk
and go during the install. Likewise I don't know if you can have
multiple hard disks in P/OS so that's a pain in the tail.
Boot from floppies and just init the raw disk.
C
On 1/14/2021 11:39 AM, Paul Koning via cctalk wrot
I'm wondering how to do hard drive formatting, which is likely to be needed
when working with emulated disks in David Gesswein's MFM emulator.
As far as I can tell, RT-11 can do this. At least I have a source code
printout for such a formatter. But while I can find a hard drive image of RT
V5
On Sat, Jan 09, 2021 at 04:16:59PM +0100, Mattis Lind via cctech wrote:
> The "shim" method worked fine. The drive spun up and I managed to dump it.
> Imade six dumps and the same five sectors were bad on every read I did.
Fantastic work!
FYI, The info. I have here is that the defect management on
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