drtiller@uokmax.uucp (Donald Richard Tillery Jr) (08/21/90)
Hey all you hardware types! Has anyone got any idea how to hack 2 Megs of Chip RAM out of a B2000 using the new 2 Meg Agnus? Surely one of you A1000 owners who have done some much great hardware hacks for it has upgraded to the B2000 and is as desperate for 2 Megs of chip as I. I'm not in a position where I have the time to look into this myself (at least for another year in my E.E. program) but I was thinking maybe a piggy back set up with an extra address line added. I recall a similar hack on my TRaSh-80 color computer for 32K on a 16K machine that worked fine. I don't know if there's enough physical room on the motherboard, but if there is.... If no one is looking into this, perhaps a techie at C= could give me enough info (and 2 Meg Agnus availability) for me to give it a try, I WAS looking for a senior project :-) Rick Tillery
billsey@agora.uucp (Bill Seymour) (08/22/90)
In article <1990Aug21.143813.7205@uokmax.uucp> drtiller@uokmax.uucp (Donald Richard Tillery Jr) writes:
:Hey all you hardware types! Has anyone got any idea how to hack 2 Megs of
:Chip RAM out of a B2000 using the new 2 Meg Agnus? Surely one of you A1000
:owners who have done some much great hardware hacks for it has upgraded to the
:B2000 and is as desperate for 2 Megs of chip as I.
:
:I'm not in a position where I have the time to look into this myself (at least
:for another year in my E.E. program) but I was thinking maybe a piggy back set
:up with an extra address line added. I recall a similar hack on my TRaSh-80
:color computer for 32K on a 16K machine that worked fine. I don't know if
:there's enough physical room on the motherboard, but if there is....
:
:If no one is looking into this, perhaps a techie at C= could give me enough
:info (and 2 Meg Agnus availability) for me to give it a try, I WAS looking
:for a senior project :-)
I looked into a bit when the 2 meg Agnus was first announced... When
I found that adapter sockets to piggyback boards on PLCC sockets cost in the
neighborhood of $140 each, I put it aside though. :-{ Note that the pinouts
of the two chips are different, and any good hack would have to be a piggyback
instead of an in-socket hack. (Too bad, we could have remapped the one meg of
onboard memory into $c00000 and made 11meg 2000s popular. :-) )
:Rick Tillery
--
-Bill Seymour ...tektronix!reed!percival!agora!billsey
=============================================================================
Bejed, Inc. NES, Inc. Northwest Amiga Group At Home Sometimes
(503) 281-8153 (503) 246-9311 (503) 656-7393 BBS (503) 640-0842