[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference hydra::amiga_v1

Title:AMIGA NOTES
Notice:Join us in the *NEW* conference - HYDRA::AMIGA_V2
Moderator:HYDRA::MOORE
Created:Sat Apr 26 1986
Last Modified:Wed Feb 05 1992
Last Successful Update:Fri Jun 06 1997
Number of topics:5378
Total number of notes:38326

3345.0. "Fat Agnus " by VIVIAN::S_GOLDSTEIN (Steve G...DTN 847-5415 ) Tue Jan 16 1990 08:19

    
    	I Just been looking at the print set that come with the Amiga Tec
    Manual ..
    
    	I noticed that there are three different Agnus chips..
    
    8670 ? 8370 8371 (the one I have in my A500 board rev 5)
    
    and if I'm right the Fatter Agnus 8372 ?? Am I rght ??
    
    	If you upgrade to the new fatter Agnus on an A500 it might be
    cheaper to cut the _Extram signal on the A501 (equivalent)..pin
    37/38 from memory...
    Or if lucky enough you might have a switch to disable ram would in the
    case of the fatter AGNUS allow it use as 1.0 meg chip ram...
    
    		Is this not so and safer than cutting the motherboard..
    
    BTW you will still need to move j201 the jumper between the rom and
    68000 chips from 2 to 3  TO 2 to 1 <???>
    
    		Steve G
T.RTitleUserPersonal
Name		DateLines