Re: laser 128ex rom image

["Richard Tilleman" <903455@ican.net>]

----- Original Message -----
From: Robert L. Doerr <rdoerr@bizserve.com>
Newsgroups: comp.sys.apple2
Sent: Wednesday, January 19, 2000 17:27
Subject: Re: laser 128ex rom image


> > btw the chip I pulled has the markings
> >  ks74hctls244n
> >  korea 752
> >
> > and I'm looking for a replacement
>
> That part is not a ROM chip.  I suppose it is possible that the chip
> could be bad but that has nothing to do with a ROM chip.  The
> one you pulled is an Octal 3-STATE Buffer/Line Driver/Line Receiver.
> It is a standard 74 series part but you have the High-speed CMOS
> TTL Low-power Shottkey version. of the part below:
>
> http://www.fairchildsemi.com/pf/DM/DM74LS244.html
>
> Most of the ROM's will start with a 27 number is an EPROM.  They
> didn't have flash memory in those old machines and if it has a mask
> programmed ROM then you need to get the ROM image and have it
> programmed into a new ROM if yours is really bad.
>
> I don't have a Laser so I can't help you there......
>
> Robert
>
thanks
do you think it will make a difference that I just ordered the hct(cmos?)
version?