todd@uhccux.UUCP (03/08/87)
In article <5074@mit-eddie.MIT.EDU> moore@eddie.MIT.EDU (Andrew M. Moore) writes: > Also, what's the story with the Multi-Speed's memory? Specs say >that it has 512K Pseudo SRAM, and 128K static RAM. What's Pseudo RAM? >Is this the same as having 640K of -contiguous- RAM, or does the Multi- >Speed still have only 512K of accessible contiguous RAM? Here is the story. The NEC MultiSpeed comes with 640K RAM. The first 512K is standard dynamic RAM. The top 128K, however, is static RAM that has it's own battery (separate from the NiCad that powers the computer itself) that is used to hold system configuration information and as a battery backed RAM disk. The static RAM batteries can retain memory up to seven days after a full main unit discharge (sitting on the shelf with a dead NiCad). If you want, you can use all 640K RAM for program space. I've found it pretty handy to have a battery backed RAM Disk of about 60K in size (the rest of the 128K I use for the firmware work space)...todd -- Todd Ogasawara, U. of Hawaii Computing Center UUCP: {ihnp4,seismo,ucbvax,dcdwest}!sdcsvax!nosc!uhccux!todd ARPA: uhccux!todd@nosc.ARPA INTERNET: todd@UHCC.HAWAII.EDU