[volt-nuts] Guide to programming the Hitachi 6303?

[David C. Partridge]

I'm trying to understand the floating ROM code for my 7081 (many thanks to Mickle T. for stating the reverse engineering job and pointing me to the right tools).

Why am I doing this?  I want to fix a broken 7081 which is reporting MAINS FAULT on power up.

I am massively hampered in this task as I don't have any experience of assembly programming 6800 or similar CPUs (or indeed any micro processors).  Are there any good resources online I can download, or books I can buy to that will get me on the road.

I know this request may be in vain as this stuff is now considered WAY out of date.

Regards,
David Partridge