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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 > >