Difference between revisions of "SP0256 Page Prefix"

From Intellivision Wiki
Jump to: navigation, search
m (Protected "SP0256 Page Prefix" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite)))
(No difference)

Latest revision as of 09:12, 4 December 2010

The Page Prefix register provides the upper 4 bits of the address for JSR instructions, as well as branches initiated by an external SP0256 Address Load command.

(Unsure: Do JSRs push 12-bit or 16-bit addresses...? I think they push 16-bit, so RTS always returns to the right place. Need to check.)