CompuServe Messages

#Virtual memory

    24-Aug-95 02:20:48
Sb: #209476-#Virtual memory
Fm: Brian Bartlett 72037,570
To: stephen savner 76323,3677
Stephen, no virtual memory program will work for you. All of them require that you have a 68020 chip with a 68551 MMU installed, or 68030 or beyond, which all have the MMU as an integral part of the chip (excepting the EC series chips). Without the MMU (Memory Management Unit) there is no way to interrupt the processor when a particular page of memory is stored on disk instead of in memory, so that the swap between the two can occur. So, you need to consider upgrading to an accelerated A500, or another machine entirely, if you are serious about using virtual memory. If you do upgrade/replace, avoid machines with 68ECxxx CPU's like the plague. They won't help you. Brian Been there…. Done that…. Better.