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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!noc.near.net!news.cs.brandeis.edu!binah.cc.brandeis.edu!DERNIS
- From: dernis@binah.cc.brandeis.edu
- Subject: Iterface Card?
- Message-ID: <1992Sep3.210221.22782@news.cs.brandeis.edu>
- Sender: news@news.cs.brandeis.edu (USENET News System)
- Reply-To: dernis@binah.cc.brandeis.edu
- Organization: Brandeis University
- Date: Thu, 3 Sep 1992 21:02:21 GMT
- Lines: 52
-
- Hi
-
- I hope someone has some suggestions.
-
- I am interested in interfacing an old waveform recorder to a PC computer,
- I have a 286 and 386 available if it makes any difference.
-
- The recoder, Biomation 8100, has the following interface features.
-
- 8 output lines.
- 16 input lines.
- A FLAG handshake line
- A CMD handshake line
- 3 address lines
- 3 address assignement lines
- Polarity asignement lines for the ouput, input, and each of the
- handshake lines independentaly. i.e. the logic is all switchable
- by hardwiring the cable properly.
-
- The handshake goes as follows.
-
- When the Biomation is ready for a comand it pulls the FLAG to 1 for at
- least 100ns, again the polarity can be switched.
-
- The computer, or other interfacing device, now puts an instruction on the
- inputs. 50ns or more later, no limit as I understand it, it pulls the
- CMD line to 1 and holds it at least 100 ns. But the instruction must
- be held until the Biomation gives the next 1 one the FLAG line.
-
- The biomation executes the insturction on the inputs, which may or may not
- include putting data on the outputs, and gives a 1 on the FLAG when completed
- and at least 50 ns after putting data on the outputs if applicable. The FLAG
- is held for at least 100 ns. Any data is held on the outputs until the CMD
- is pulled to one by the computer.
-
- That is the end of the handshake cycle, the biomation can do this at
- up to 2Mhz transfer rate.
-
- The biomation can also be set up to output only. The handshake is identical
- only the inputs are held at 0 and not read the instruction is always
- assumed to be output data.
-
- Questions: Does anyone now of a commercially availbe card that will do this?
- Preferably the full handshake, but at least the output. I think I can
- get a GPIB to do the output.
-
- Preferably such a card would be capable of DMA in an input only mode or
- better yet input and output.
-
- Please Help,
- Thanks
- Mitch Dernis
-