Panasonic HHC ROM 'capules'

[brouhaha]

(01-09-2023 12:35 AM)Paul Berger (Canada) Wrote:  Its too bad about the Apple II development system a few years ago I bought a lot of HHC stuff and among that lot there was a copy of a document "A Programmer's Manual for the Hand-Held Computer' written by Friends Amis and the Apple II development system is mentioned in their I had scanned it some time ago for another person interested in the HHC and it is still floating around n my Google Drive

Wow, those documents are great! Thanks for sharing them. They would have saved me a huge amount of time back when I was trying to reverse-engineer the HHC. Even now, if I can find time to work on it, I can use the Programmer's Manual to update my sources for a lot of stuff I hadn't yet figured out.

Quote:I have one SnapBASIC module that has a pin rotted off it so I lifted the label on the top and found:
AMI 8306RE
11677A (the first two character could be II)
SBASIC Korea

AMI was a big player in masked ROM (and made PMOS chips for HP calculators). The 8306 is the date code (sixth week of 1983), and 11677A is probably the mask code number AMI assigned.

I see mention in the manuals that 16K ROMs are "slow ROMs" and have to be marked as such. I'll have to check whether the image I have is so marked. Since it was in an separate EPROM box, it rpobalby could have run fast.