Den Thu, 12 Jul 2018 11:31:42 +0200 skrev Michał Pleban <lists@michau.name>: > Hello! > > Mia Magnusson wrote: > > > Of course this would only be visible by the 6509, but it would still > > make it far easier, just copy 4k of data each time the screen needs > > updating. Not sure if a 4k block copy (fixed addresses both for > > source and destination, and requiring ,Y indirect addressing for > > either source or destination) would be too slow to just do on each > > interrupt. > > Regarding this, I already tried to check what would it require to > write a screen copy routine. Generally, an IBM->PETSCII conversion > requires just two additional LDA xxx,X instructions so it will not be > much more difficult. > > Plus, you cannot run this in the interrupt, because you would need to > access the RAM to copy the characters from, and you can't do that when > 8088 is running. The copying must be initiated by the 8088. How about inside the 18Hz 8088 interrupt (if that is emulated)? -- (\_/) Copy the bunny to your mails to help (O.o) him achieve world domination. (> <) Come join the dark side. /_|_\ We have cookies.Received on 2018-07-12 22:00:04
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