Re: vortex memory upgrade?

["Tom Lambrecht" <hideo@concentric.net>]

YIKES

sure there are other Vortex owners besides me that are interested in this
bit of arcana . . .

keep us posted

Tom Lambrecht
hideo@concentric.net
-----Original Message-----
From: b.knox <b.knox@latrobe.edu.au>
To: Loopers-Delight@annihilist.com <Loopers-Delight@annihilist.com>
Date: Wednesday, November 17, 1999 3:14 AM
Subject: vortex memory upgrade?


>hi all ...
SNIP
>
>hang onto your chairs 'texter users ... page 4 in the "theory of
>operation" section:
>
>"Audio memory consists of 64K x 4 DRAMs, which provide a total of 2
>seconds of
>delay. The unit may optionally be configured with 256K x 4 DRAMs, with
>the
>addition of U10."
>
>an 8 second vortex? eeep um that would be er, nice.
>
>no other mention is made of this "memory upgrade" except in the actual
>schematics...
>the U10's look like they make up an extra bit of the DRAM controller ..
>part number 74HC125 (what are the little triangles again? capacitors?)
>...  it
>looks as though the routing to the DRAM chips must be completely changed
>to get
>the 256K's in there... i'm not too sure... U10 is included in the
>schematics as "spare".. don't know if they're actually inside the box
>... getting ye olde 256K DRAM should prove entertaining enough anyway...
>
>i've emailed both lexicon and Bob Sellon (of jamman upgrade fame) about
>this but with no response ... anyone heard of such an upgrade?
>
>i'd really like to know if 8 sec / dual 4 sec vortex bliss is possible
>in this universe ...
>
>brad
>
>