[time-nuts] Rom Expansion for HP5370B

[Poul-Henning Kamp]

In message <920772.7182.qm at smtp103.prem.mail.sp1.yahoo.com>, Scott Newell writes:
>At 08:50 AM 2/19/2011, Poul-Henning Kamp wrote:

>I've had similar (like maybe a Luminary ARM + ethernet) thoughts.  I 
>wasn't sure if the firmware was simple enough to be re-written so 
>that the entire CPU section could be replaced.

I have far from made any plans, it's only "If I landed on a desert island
with only my entire lab and plenty of time" kind of musings :-)

I guess it depends on the spirit of the project how you would do it,
from adding an ekstra EPROM and using the M6800 to add a bit of steampunk
features or to replacing the entire CPU board and modernize the instrument.

The firmware is pretty approachable, it is only 8KB code and I am pretty
sure a cortex3 could emulate it in real time if it came to that.

Since the image is static, it would be trivial to write a m6800->C
converter and compile the image for any CPU you cared for.

Poul-Henning
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