The HP1000 264x boot rom uses a common BACI board. I have the source
code listing for that
boot rom.
The protocol is very simple, the HP sends "<escape> e" I beleive, and
then listens to a stream of bytes to be sent in the HP standard BBL
format. This is the same format used for HP paper tapes, so all the
software on the HP2100 archive site can be loaded this way. There is no
additional handshaking for each byte as it is read.
(its also the format used to distribute HP-IPL/OS)
This is a quick and easy way to get your 2117F booting.
Glen Slick wrote:
> Thanks for the info, but that's a bummer since I have no software
> media with the 2647F that I have, and it might not be too likely that
> I will ever find any.
>
> My guess is that the difference between the 2647A and 2647F is that
> the A model uses tapes while the F model uses floppies. I have two
> 5.25" drives for my F model and it does not have tape drives, and
> apparently tapes were not options on the F model. I have an HP '84
> catalog which lists the 2647F (at around $9000) but not the 2647A.
>
> Does anyone have a service manual for 264x terminals? If they have
> full schematics and firmware info at least I could try writing 8085
> code to run on my 2647F if I find a copy of one. From looking inside
> it looks like it has 128KB of DRAM (must be paged somehow) and 12 ROM
> chips of unknown size. Also it looks like the floppy controller has
> it's own Z80 and ROM and a WD 1791 controller.
>
> This might make a interesting project (aka timesink) trying to figure
> out how it works and how to do someting with it other than use it as a
> terminal.
>
> I have a 264x loader rom in my HP 2117F so maybe I can get it load
> code from a floppy on the 2647F (it appears that you can set a file on
> a floppy to respond to tape commands). That would be another project
> in itself since I don't have any documentation on the 264x loader rom
> nor do I know if I even have a serial interface card that it supports.
>
> -Glen
>
>
>> From: kevenm_at_reeltapetransfer.com (Keven Miller)
>> Reply-To: cctalk_at_classiccmp.org
>> To: cctech_at_classiccmp.org
>> Subject: Re: HP 2647A / F Terminal
>> Date: Sun, 20 Oct 2002 00:46:28 -0600
>>
>> I just happen to have a 2647A User's manual
>> and a 2647A Reference Manual [no terminal].
>>
>> User manual, CH. 6, starts:
>> This section describes briefly how to load
>> the BASIC interpreter from your BASIC
>> Multiplot cartridge tape (part no. 02647-13301).
>>
>> Sounds like you need a tape.
>>
>> Keven Miller
>> kevenm_at_reeltapetransfer.com
>
>
>
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Received on Mon Oct 21 2002 - 16:18:00 BST