On 2013-12-17, at 22:59, Bil Herd <bherd@mercury-cg.com> wrote: > Several of the times when I tried to "clean up" this kind of thing for > the C128 I would come across a compatibility issue; we found that third > parties had used the glitches on IO lines to latch R/W and that some carts > like the Magic Voice cart would drive the bus at unexpected times > including the high address lines (They would toggle /GAME and /EXROM > dynamically when the system had been designed for them to be solder > jumpers). Actually the cart that spawned the whole discussion about ribbon cables (initially in the SX) depends exactly on this. It reconfigures the memory layout dynamically and within an extremely tight timeframe to allow a true KERNAL replacement over the EXPANSION port. -- SD! Message was sent through the cbm-hackers mailing listReceived on 2013-12-18 15:00:06
Archive generated by hypermail 2.2.0.