HP-71 Diagnostics

[Dave Frederickson]

(06-08-2020 02:34 PM)KimH Wrote:  I got a response, no good answer as to why parts of the debugger is built in, maybe this was for the HW-designers to have the functions handy in a module, rather than loading something.

Despite being one of the developers, the seller only recently learned of the undocumented, QQ debugger, so don't expect any answers in that regard.

(06-06-2020 04:07 PM)KimH Wrote:  In the BRILLIANT 71B Compendium from Sylvain there is a link to a [Service] ROM-dump made by J-F, so one is available. Playing with that will have to wait to next time it rains

There are two versions of the Service ROM image. The original is 64k, like the O/S ROM, so that it'll run in Emu71/DOS. The ROM itself is only 16k and both versions will run in Emu71/Win. There is another version of the Service ROM without the HP-IL or Card Reader tests - a prototype.

Here's something I've been wondering, could the QQ debugger have been used to dump the Service ROM?

Dave