Hi Si, In a word... Wow! I hadn't realised there was such a performance hit using JP over JR! A 24T JP is painful! I've always used JP - assuming (naively) that it was faster based on Z80 T-state lists.
So all these years I've been crippling my code with JPs when I should have used JRs! Doh! Still, it's only taken me 21-years to realise this! I've always been a bit on the slow side! In short, then, I guess I should ignore what Zaks is telling me regarding T-states and simply try to use single/double byte instructions wherever and whenever possible? Thanks for the info Si. It's quite an eye opener! Chris...
