(HP71B) ASM question

[KeithB]

(07-30-2024 07:54 AM)J-F Garnier Wrote:  Do you know where the Capricorn CPU architecture, used in the Series 80 and the 75C, comes from?
It has some loose connections with the calculator architecture with its capability to handle a whole 64-bit register operation in one opcode, but has many distinctive capabilities and is less calculator-oriented with no dedicated register fields but a flexible 'multi-byte' mode.
I never found anything close. Did HP develop it from scratch ?


J-F

Check out the August 1980 HP Journal:
"A Custom LSI Approach to a personal computer"
I think "Custom" tells you what you need to know. 8^)