The 'os' is in ROM on the 2647F and I can get to the command line to format
floppies and create and copy files and such. It is just that BASIC is not
in ROM so doing more interesting things other than using it as a terminal
will take more work.
I did find a little bit of information on the web and you can send it a
sequence like this to enter and execute 8085 code:
ESC & b (at this point the display says "LOADER")
<address in octal> a
<data in octal> d
... and so on
<data in octal> d
<address in octal> a
E
I wrote a loop to cycle reading every byte in the address space and I
attached a logic analyzer to verify that the code was executing. Since I
can do that I should be able to capture the ROM code and then unassemble it
and then maybe figure out how to read the keyboard and write to the display
and then do some more interesting things with it.
Anyone on the list happen to have an HP 10304B 8085 processor probe?
-Glen
>From: "John Allain" <allain_at_panix.com>
>Reply-To: cctalk_at_classiccmp.org
>To: <cctalk_at_classiccmp.org>
>Subject: Re: HP 2647A / F Terminal
>Date: Mon, 21 Oct 2002 16:29:38 -0400
>
>+AD4- ...since I have no software media
>+ADw- with the 2647F that I have...
>
>Since the tape based terminals of that era did
>not rely on the tape for an os (it was ROMmed),
>perhaps the +ACo-F series also has control of the
>drives using only ROMware.
>
>The way I remember it working is that a combination
>of Top Key presses would result in commandlines like so:
> COPY DISPLAY to PRINTER
> COPY LTAPE to RTAPE
> COPY DISPLAY to RTAPE
>That sort of thing.
>To try before you give up.
>
>John A.
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Received on Mon Oct 21 2002 - 16:09:00 BST