Path: utzoo!mnetor!uunet!lll-winken!lll-tis!ames!elroy!mahendo!jplgodo!wlbr!etn-rad!jru
From: jru@etn-rad.UUCP (John Unekis)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Prom burners ???
Message-ID: <340@etn-rad.UUCP>
Date: 9 Mar 88 18:02:17 GMT
References: <523@wa3wbu.UUCP>
Reply-To: jru@etn-rad.UUCP (John Unekis)
Organization: Eaton Inc. IMSD, Westlake Village, CA
Lines: 22

In article <523@wa3wbu.UUCP> john@wa3wbu.UUCP (John Gayman) writes:
>
>    I'm having a slight problem with a Prom burner that maybe one of you
>has already run across. The problem seems to be a failure when writing
>a new Prom, it bombs out at address 4000. It always stops at 4000!  I've
....
Check the amount of memory that is actually located in your prom burner.
Most prom burners were designed back when a 4K prom was REALLY BIG. Address
4000 hex is 16K in decimal, thats about the total memory available on a lot
of prom burners. If this proves to be the case with your machine, you will
need to either add memory, or program the machine to burn the prom in several
(like 16) passes. Pass 1 would read 16K starting at address 0, then write
16K at address 0, pass 2 would read 16K starting at address 4000, then write
16K at address 4000 (pass1 would go 0-3FFF, pass2 would go 4000-7FFF) etc.
till you get to 3FFFF.  

This may seem like a royal pain, but it just goes to show that technology is
advancing faster than it can propagate into the supporting structure of
most companies.

Just wait a couple of years until microprocessors hit the  multiple 100 MIPS
range, and circuit boards will start radiating microwaves. Imagine your PC
locked in a lead box to protect you from harmful radiations. It wont be long!