HP97 The journey begins
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04-25-2019, 01:47 AM
(This post was last modified: 04-25-2019 01:53 AM by teenix.)
Post: #59
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RE: HP97 The journey begins
Hi all,
I've been making some more progress with the HP67 replacement CPU board. It is really time consuming to debug software that is running other software that can also talk to a PC running more software :-). I have been building code for the external program storage/recall plus a menu interface to access them. The menu is activated by holding the "h" key down for 1/2 second or longer. Then you can scroll through the items with the "+" and "-" keys and make a selection with "Enter". I transferred the HP67 diagnostics "A" cards from the PC to the HP67 external program memory and loaded it from the new menu. If anyone is interested here is a small video of the result. It shows the HP-67 PC emulator and a HP-67 with the new CPU board both running the same code. http://www.teenix.org/HP67diag.mp4 (about 20Meg) The PCBs arrived today with the modified design so I have to build one and try it out. cheers Tony |
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