Re: Hacking 1764 RAM expansion to 512KB

From: Marko Mäkelä (Marko.Makela_at_HUT.FI)
Date: 2002-03-27 08:09:42

  • Next message: MagerValp: "Re: Hacking 1764 RAM expansion to 512KB" 
    On Wed, 27 Mar 2002, Spiro Trikaliotis wrote:

> I'm surprised: In http://staff.washington.edu/rrcc/uwweb/1750/Schem-l.jpg,
> I see U18 as 27128/27256 EPROM. Although I have programmed a REU before and
> read the user's manual, I did not know that there is an EPROM socket 
> inside a REU! 
> 
> What is it used for?

Perhaps it could be used as an external C128 Function ROM.  I haven't
tried it; I'm just guessing.

BTW, does the service manual list both versions of the REC chip?  One is
in a square package (PLCC?), while the other is in ceramic dual-in-line
package.

	Marko

       Message was sent through the cbm-hackers mailing list

    Archive generated by hypermail 2.1.4.