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- Path: sparky!uunet!mcsun!uknet!pyrltd!mwuk!tony
- From: tony@microware.co.uk (Tony Mountifield)
- Newsgroups: comp.sys.atari.st.tech
- Subject: TT VME Interrupt help needed!
- Message-ID: <1313@mwuk.UUCP>
- Date: 8 Jan 93 14:19:43 GMT
- Organization: Microware Systems (UK) Ltd., Winchester, UK.
- Lines: 42
-
-
- Hi Folks,
-
- I wonder if any TT people out there can help me?
-
- I am writing a device driver to run under OS-9 on the TT, to talk to an
- Ethernet card called the Bionet VME from Biodata GmbH. The example
- driver from Biodata running under TOS just polls the chip, but under
- OS-9 I need the Ethernet to generate an interrupt. I haven't yet
- succeeded in doing so.
-
- The Ethernet chip is a DP8390, and has an INT output.
-
- Looking at the tracks on the Ethernet card, there is a connection to the
- *IRQ5 line, so I guess it should be possible somehow.
-
- I was concerned that I could not see any tracks to *IACK, *IACKIN and
- *IACKOUT. Is the TT VME bus non-standard in some way?
-
- The only information I have on the TT is a Field Service Manual with
- circuit diagrams, but no programming information. The VME *IRQ5 line
- appears to be called XIRQ5 and goes to the TTSCU pin /BIR5. The XIRQ5
- line also gets driven by the SCC interrupt.
-
- If the VME *IRQ5 is aserted, does the TT execute a standard IACK cycle
- on the VME bus? Or does the TTSCU define some sort of automatic vector?
-
- Any relevant advice would be much appreciated - particularly from anyone
- familiar with the Bionet card!
-
- Thanks in advance,
-
- Tony.
-
- --
- Tony Mountifield (G4CJO) | Microware Systems (UK) Ltd.
- -----------------------------------| Leylands Farm, Nobs Crook,
- Email: tony@microware.co.uk | Colden Common, WINCHESTER, SO21 1TH.
- (or: ...!uknet!mwuk!tony) | Tel: 0703 601990 Fax: 0703 601991
- ------------------------------------------------------------------------
- ** Any opinions are mine, not Microware's - but you knew that anyway. **
- ------------------------------------------------------------------------
-