🚀 go-pugleaf

A Low Cost DSP Hackerboard is being distributed on a not-for-profit
basis to keep costs down, so that more people can benefit from  the
critical mass being reached with the 56000 processor. 

The GMP/56K is a 9" by 6" four-layer board with the following
features: 

- 27 mHz 56K SLAM pack DSP

- 27 mHz crystal 

- 64K static RAM each for X and Y memory spaces 

- 32K static RAM for program memory 

- 32K ROM for DSPBUG monitor 

- on-board MIDI interface and ICL232 RS-232 interface 

- connectors for Host Port and High-speed serial port

- on-board 1.2amp 5v power supply 

The board was origionally designed and developed by Daniel Kelley, who
has also been working with low-cost DSP boards using the TMS32010. 
The PC board layout was implemented by Steven Curtin, who also added
the ICL232 and MIDI buffers and the power supply to the design.   

The GMP/56K comes up able to communicate with any computer via RS-232,
and is standalone, not requiring that it be plugged into any 
particular computer's bus system.  

A/D/A conversion is not supplied because of the plethora of solutions,
but a PC board with oversampling D/A's and A/D's is in the works.  In
the meantime it is possible to wire up inexpensive serial DACs to the
board for around $50. It's also possible to interface many CD players
and DAT machines to the GMP and use their converters.

For $250, you get: 

four-layer GMP PC board 

27 mHz 56001 DSP chip socket for 56001 

27 mHz crystal 

ICL232 if you're planning on running RS-232 

9 32K 85ns static RAM chips

32K DSPBUG ROM

Assembly instructions 

Two "batches" of these boards have already been sold and are being
assembled by their owners.  I am currently collecting names for
another batch- since the DSP parts must be bought at least ten at a
time and it's much cheaper to order the PC boards ten at a time.   

The SLAM pack has a delivery period of 12 weeks.  Motorola's new  Quad
Flat Pack has a much shorter delivery time of two weeks, and is being
tested with the board.  Motorola claims the Flat Pack's pinout is
compatible with the SLAM pack's, and if it works we'll switch. 

Upon receipt of a check I'll send the future owners a parts list  of
the other parts you'll need, mostly sockets and passive components, 
so you can shop for these parts while you're waiting for the kit.   If
you're interested in a board send me email at curtin@well.uucp or call
me at (415)340-8679.  

There's also a message and discussion section on GMP developments 
on the HMSL BBS.  Its modem line number is (415)928-8246.