HP 2640 character set generation manual in the UK

Mattis Lind mattislind at gmail.com
Thu Nov 9 06:39:36 CST 2017

2017-11-09 10:55 GMT+01:00 Christian Corti via cctalk <cctalk at classiccmp.org

> On Wed, 8 Nov 2017, CuriousMarc wrote:
>> Awesome! The microcode listings would be fantastic too, as I also have a
>> 2749 (which you are supposed to be able to program in assembly)! Let us
>> know
> The firmware is already on bitsavers, IIRC. But you can program every 264x
> terminal in assembly. There are some games like Pong, Space Invaders etc.
> for these terminals, both for the i8008 based 2640/2644 and the i8080 based
> 2645/2648. These terminals all have a special control code sequence to load
> a binary file (either from tape or from the serial line) into memory and
> start executing. It is "<ESC> & b".
> A short description and sample program for the 8008 based terminals can be
> found here:
> http://computermuseum.informatik.uni-stuttgart.de/dev_en/hp2644/diag.html

Very interesting! I have a 2640 which I recently refurbished the screen on
and it runs happily and then a 2645 that still needs treatment for the
screen rot. Is the binaries for pong and space invaders downloadable
somewhere? I searched the usual places, but haven't found anything. It
would be interesting to test this binary download mode.

> Christian


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