Path: utzoo!attcan!uunet!dalcs!lane
From: lane@dalcs.UUCP (John Wright/Dr. Pat Lane)
Newsgroups: comp.sys.ibm.pc
Subject: Speeding up old PC's
Keywords: CPU clock speed, V20
Message-ID: <3009@dalcs.UUCP>
Date: 25 Sep 88 08:28:14 GMT
Organization: Math, Stats & CS, Dalhousie University, Halifax, NS, Canada
Lines: 47

I have two old 4.77 MHz PCs...they're true blue IBM's...one is a "5150" which
is, I believe, a PC-2 and the other a "5160", an XT.

I'm wondering what I can do to jazz them up, particularly with regard to CPU
speed.  Could I replace the CPU with an 8MHz 8088 or V20?  Would I have to
change the crystal?  how about the RAM memory? 

Any suggestions on other things I could with these old clunkers (besides boat
anchors :-)

Technical details on the 5150:
Intel 8088 CPU, no co-processor
256K on motherboard (MOSTEK 8424/MK4564N-20 if I'm reading the chips (and my
	notes) correctly...some chips have "8344" instead of "8424")
AST Six Pak Plus with 384K (MicroTek 4264-15's ...I presume this is 150nsec
	memory while that on the motherboard is 200?)
PERSYST monochrome display adapter/printer port...would the RAM on this card
	be an issue?
Process Traveller full height floppy and controller from "TPA"?
Miniscribe 10Meg hard drive (very noisy, even after I fiddled with the static
	strap) with an IBM 1501492 controller...no format routine in ROM that
	I can find
63.5 Watt power supply...would this not be a candidate for upgrading?
ROM BIOS dated 10/27/82
HD controller BIOS contains "5000059 (c) IBM 1982  08/16/82"
Also in ROM space "IBM PC Basic ver C1.10 copyr. 1981   25-Apr-81"

Technical details on the 5160:
AMD 8088 with no co-processor
256K on mother board...didn't record what the chips were
STB RIO PLUS II multifunction board with 384K RAM, uT4264-15s and MM4164A-15's
Hercules monochone graphics/printer
Tandon TM100-2A full height floppy with controller (don't know what kind)
Tandon TM502 hard disk with an Adaptec controller (BIOS has ACB2000 fmt pgm)
130W power supply
BIOS dated 11/08/82

What about changing the full height floppies for half height devices?

Much appreciate any advise or general info on what I've got here.


-- 
John Wright      /////////////////     Phone:  902-424-3805  or  902-424-6527
Post: c/o Dr Pat Lane, Biology Dept, Dalhousie U, Halifax N.S., CANADA B3H-4H8 
Cdn/Bitnet: lane@cs.dal.cdn    Arpa: lane%dalcs.uucp@uunet.uu.net
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