🚀 go-pugleaf

In article <4000@copper.Denver.Colorado.EDU> ssarmast@ucdacm.denver.colorado.edu (Sam Sarmast)  
writes:
>I'm beginning a project using a NeXTstation for real time digital
>signal processing and I'm having a little trouble finding
>information on how to interface an A/D board to the DSP port on the
>back of the   machine.  Anyone have any thoughts on where I could
>find such information? 

You typically need 4 wires like below to interface A/D's to the
DSP port.  Actual pin# for signals may vary depending on the
operating mode of the DSP (whether transmitter and receivers are
synchronized or not).  NeXT DSP port presents directly what comes
out of Port-C of DSP56001.  You should get the DSP56000/1 User's
Manual from Motorola for more detail.

;; DSP56001 signal name         NeXT DSP port(DB15) pin#
;; -----------------------------------------------------
;; SCK (SSI bit clock)           1
;; SRD (SSI received data)       2
;; SC2 (frame sync)              12
;; GND (ground)                  9, 10, 11, (15)

--
Izumi Ohzawa
USMail: University of California, 360 Minor Hall, Berkeley, CA 94720
Telephone: (510) 642-6440     Fax:  (510) 642-6341
Internet: izumi@pinoko.berkeley.edu (NeXT Mail OK)
r not).  NeXT DSP port presents directly what comes
out of Port-C of DSP56001.  You should get the DSP56000/1 Use