Newsgroups: comp.sys.amiga
Path: utzoo!censor!comspec!darrell
From: darrell@comspec.uucp (Darrell Grainger)
Subject: Re: Amiga Custom Chips and others
Organization: Comspec Communications Inc  Toronto Ontario
Date: Sat, 29 Jun 91 16:26:19 GMT
Message-ID: <1991Jun29.162619.16282@comspec.uucp>
References: <9117613.21405@mulga.cs.mu.OZ.AU> <7574@vela.acs.oakland.edu>
Sender: Darrell Grainger

In article <7574@vela.acs.oakland.edu> lmbailey@vela.acs.oakland.edu (Laurana Bailey) writes:
>In article <9117613.21405@mulga.cs.mu.OZ.AU> rayhann@ee.mu.OZ.AU (rayhann chee) writes:
>| Just want to enquire how does one know if the Agnes in the A500
>| is the latest version? ( I have an A500 rev 6 motherboard. )
>
>Go into your CLI and type Avail if the listed amount of Chip Ram is
>greater than 512K then you have the newer 1 Meg Chip Ram Agnus. 

 If you buy an Amiga 500 with the new 8372A Agnus (1meg CHIP memory) it will
most likely be configured for 512K CHIP/512K FAST. Adding an A501 (or
equivalent) will bring the Amiga 500 up to one meg but before that you only
have 512K so Commodore would disable the one meg CHIP feature. 
 
 Bottom line. You can have the latest version, i.e. 1meg CHIP, Agnus but still
only show 512K of CHIP memory. The one feature that the 8372A Agnus has that
the old 8370 (NTSC) and 8371 (PAL) Agnus did not have was the ability to switch
between NTSC and PAL resolutions. There are many PD programs that will switch
between NTSC/PAL on the 8372A. If you run one of these programs and nothing
happens... you have the old Agnus. If it switches resolution then you have the
new Agnus. If you want one of these programs to test tell me and I'll uuencode
a version that I wrote.

>
>| 
>| rayhann
>
>Laurana
>-- 
>/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
>|Just another lemming...        | Yet another Amiga maniac set loose   | 
>|                               | on the world...and you thought things| 
>|lmbailey@vela.acs.oakland.edu  | couldn't get any worse.              |


-- 
Darrell Grainger % Comspec Communications Inc., Toronto, Ontario, Canada
darrell@comspec  % Disclaimer: All opinions expressed are my own. 
(416) 617-1475   % (416) 633-5605	(416)785-3553