| 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 |
I just got my B2000 today.
In the documentation supplied were some Amiga 2000 Manual Update
Pages.
On the second to the last page was a listing of how to set the
internal jumpers. ONE was for FAT AGNUS...
The last page was title CUSTOM ANIMATION CHIP -- FAT AGNUS
This page described all the functions of the FAT AGNUS,
and included a block diagram for FAT AGNUS. Has anybody
seen this? Guess I am gonna have to open my machine up
this evening and try and see if this thing is in there.
The chip is labeled an 8370 on this page. Does anybody know
what the current AGNUS is labeled??
brad
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 986.1 | Check the Manual First! | HIT::WHERRY | Servant of Cthulhu | Fri Dec 18 1987 13:25 | 13 |
With regard to labeling of AGNUS, I looked in the Introduction to
the Amiga 2000 which has yes, the Amiga 2000 schematics...nifty...
Wish I knew what all those squiggly lines mean. I managed to find
the AGNUS chip in them. It is labeled 8361.
so, to you EE types, does this mean that If I open my machine up
and find a chip labeled 8370 that there is a FAT AGNUS inside?
boy, things can get really strange in a day can't they.
brad
| |||||
| 986.2 | BAGELS::BRANNON | Dave Brannon | Fri Dec 18 1987 13:47 | 6 | |
the FAT AGNUS in the B2000 is still only for 512K chip ram.
The chip has the pins to support 1 Meg chip ram but it doesn't
use them. A future upgrade will have a new FAT AGNUS chip that
does use them.
-dave
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| 986.3 | ANGORA::SMCAFEE | Steve McAfee | Fri Dec 18 1987 15:36 | 9 | |
There was a usenet message recently about a someone selling
the 2000 with the machine already configured for FAT AGNUS. Most
likely they simply did whatever was mentioned on the page you
discussed. Unfortunately since the machines didn't actually have
a FAT AGNUS, they would crash when chip memory allocations went
over 512K. Not surprising.
- steve mcafee
| |||||
| 986.4 | The Fat Lady | TLE::RMEYERS | Randy Meyers | Fri Dec 18 1987 18:41 | 9 |
Yep, all Amiga 500s and all B2000s come with the (limited to 512K chip ram) Fat AGNUS. The limited Fat AGNUS is also handling the 512K of half-fast ram that is standard in the B2000 and an option in the A500. When the true Fat AGNUS comes out it is expected that the 512K of half-fast ram at C00000 will disappear and become chip memory located at 8000. The chip is easy to find. It is a large square chip in about the center of the motherboard. All the major chips on the board have their name next to then on the circuit board. The Fat AGNUS is labeled, "The Fat Lady." | |||||