On Wed, 23 Feb 2000, Levente Hársfalvi wrote: > There is no difference between the C16 and Plus/4 ROM. Instead, the > Reset routine checks the available RAM amount by the method Marko wrote > (writes to $ffx0...$ffff, then checks if $3fx0, then $7fx0 is the same). > Actually, it can detect three different memory sizes (16K, 32K and 64K) > - there was a prototype in this series, the 232 which was somehow > equipped with 32K of RAM. It uses 4 41416 DRAMs (2 banks of 16K) which may be selected with NAND gates, the normal RAS and CAS signals and A14 perhaps? (I'm guessing) Does anyone on the list have a 232? Apparently they leaked out in the Netherlands. Richard - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
Archive generated by hypermail 2.1.1.