[comp.sys.amiga.hardware] Fat Agnus in A500 Amiga

richardc@sands1.swbt.com (Richard Cavin) (01/06/91)

With all this talk about the Fat Agnus Chip I decided to check out my A500.
I checked inside and have the 8372A Agnus chip in my machine. The machine
is an A500 with the commodore 512K add in ram expansion. I purchased the
machine in the first half of 1990 new through the educational discount.
Since I had the 8372A chip I tried the NTSC-PAL program to boot in PAL
mode. I used the BootPal program specifically and did a warm reboot. When
the workbench came back up the display was more compressed vertically and
the text and icons seemed to be at a higher resolution with a different
scan rate on the video (1084S monitor). I then proceeded to go through
my collection of Europeon demos I have and lo and behold there was text I
have never seen before at the bottom of the screen and at the top on
one of the demos. Not only that the graphics were remarkably faster on a
couple of the demos. I also booted several NTSC versions of Euro games
in the Pal mode and they also shrunk vertically but seemed to be better
resolution. On the recommendation of a friend I tried the avail command
from the WB and it only showed a max of .5 meg chip ram and .5 meg of
fast ram. He told me that if the chip ram was not 1 meg then I did 
not have the Fat Agnus? I tried the avail command in regular NTSC mode
and Pal mode. The results wer identical. So could anybody tell me what
I really have? Also, what are the benefits of the Fatter Agnus? If I
do have it would it be advisible to get Pal versions of programs
since the resolution does look better? Thanks in advance and remember
I am NEW to the Amiga world.

Richard