This rockwell sheet is inconsistent: http://archive.6502.org/datasheets/rockwell_r65c00_microprocessors.pdf On page 1-12, only the 6502 branches have (2) but the bbs/bbr don't On page 1-11, both the 6502 branches and the bbs/bbr have **. (2) & ** are +1 cycle if taking branch to same page, +2 if taking branch to different page. If it were like the 6502 branches then I'd expect it to be 4/5/6, not 5/6/7. As it would be 3 cycles to fetch the instruction, 1 cycle to fetch from zero page, 1 cycle if the branch was taken and another cycle if that branch crossed a page. Therefore I think page 1-12 is more likely to be correct and it always takes 5 cycles. On 26/06/2016 09:12, Kajtár Zsolt wrote: > * Rockwell sheet says 5/6/7 cycles. > Message was sent through the cbm-hackers mailing listReceived on 2016-06-29 10:00:07
Archive generated by hypermail 2.2.0.