On Wed, 8 Jul 2026 18:51:00 -0500, Mike Schwab wrote: >APL\360 thought no one would ever need 9MB, so they used the top bit >of a 24 bit address field. > Would that cause addressing exceptions? Or was that the Bad Old Days when addresses wrapped at installed storage?
(What's an "addressing exception"?) Some Apple II hacks depended on using the effect of invalid addresses to detect vertical retrace! $1/byte? $0.125/bit? weren't those cores threaded by hand labor? -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
