ksb@homxa.UUCP (K.BANDES) (02/12/86)
Someone named Brad writes > I found out today that if you add a third party hard drive to a > 6300 (on the 8-bit bus) the cpu slowes down to the speed of an IBM PC > while access that memory. What exactly does this mean? How could a hard drive (or anything else) slow down the cpu? Should I worry? (I have a 6300 with a third-party hard drive.) Ken Bandes AT&T IS Disclaimer: I'm not responsible for anyone's grammer but my own.
guzzi@uiucdcsb.CS.UIUC.EDU (02/15/86)
> >/* ---------- "Hard Drive Slows Memory?" ---------- */ >Someone named Brad writes > >> I found out today that if you add a third party hard drive to a >> 6300 (on the 8-bit bus) the cpu slowes down to the speed of an IBM PC >> while access that memory. > >What exactly does this mean? How could a hard drive (or anything else) >slow down the cpu? Should I worry? (I have a 6300 with a third-party >hard drive.) > >Ken Bandes >AT&T IS > >Disclaimer: I'm not responsible for anyone's grammer but my own. I was also puzzled when I first read this. I think you sould substitute "memory expansion card" for "hard drive" in the above message. All expansion cards for the ibm pc use an 8 bit data bus while the pc6300 uses a 16 bit data bus. If you put in an 8 bit memory card, then the 6300 will slow down to the speed of an ibm pc when accessing memory on the 8 bit bus. --Mark Guzzi University of Illinois at Urbana-Champaign ARPA: guzzi@uicsrd.csrd.uiuc.edu guzzi%uicsrd@uiuc.arpa CSNET: guzzi%uicsrd@uiuc guzzi%uicsrd.csrd.uiuc.edu@csnet-relay UUCP: {ihnp4,convex,pur-ee}!uiucdcs!guzzi BITNET: guzzi%uicsrd.csrd.uiuc.edu@WISCVM.BITN
tue@olamb.UUCP (Tue Bertelsen) (02/17/86)
It is only the presence of a memory board with an 8-bit access path that can slow down the PC6300 (and the Olivetti M24 here in Europe). It will however not be as slow as the IBM PC, due to the higher clock frequency. I remember seeing an announcement of a PC6300 compatible memory board from AST. However, why don't you just plug in 256Kbit RAM's in the motherboard. It is prepared for it and your dealer/service center should be able to do it. That's what we do here in Europe, but we are not so clever ! -- Tue Bertelsen AmbraSoft A/S tue@olamb.UUCP
bam@sdchem.UUCP (Bret Marquis) (02/23/86)
The earlier 6300's did not have sockets for the additional memory. for 640k your had to use another board. Bret Marquis (sdcsvax, ihnp4) bang!bam
gpw@ihlpf.UUCP (Wilkin) (02/25/86)
> The earlier 6300's did not have sockets for the additional > memory. for 640k your had to use another board. > Bret Marquis > (sdcsvax, ihnp4) bang!bam If you would consider a MAC upgrade, you would consider removing the ram chips from the motherboard. Then replacing them with sockets and 256k ram chips. It is worth it if you need all the slots. Or if you want your memory fast ( if you currently use the 2 connector type board - this won't gain you much) it is the best way to go. gpw -- George Wilkin AT&T Network Systems work 312-979-6593 ihnp4!ihlpf!gpw Naperville-Wheaton Road Naperville, IL