king@vrdxhq.verdix.com (Greg King) (07/04/90)
Greetings: I am currently trying to port a Berkley like (Sun OS 4.0.3) network interface driver to a Microvax 3300 under Ultrix 3.1 and looking for some information. My first question concerns the device specification for the configuration file. The device specification I expect to use is shown below: device xx0 at uba? csr 0xa000 vector xxintr Is there not a special mnemonic to refer to QBUS adapters? For example, maybe "qba?". I can find no mention of such a mnemonic anywhere so I'm going on the assumption that "uba" is used interchangeably to mean UNIBUS or QBUS. Is this true? Second, is the csr address an offset from the start of bus memory or an absolute physical address? Does the CSR literally have to be in the upper 8K of QBUS space typically reserved for CSRs or can it be anywhere within QBUS space? Finally, assuming that Ultrix does not use the output from the probe routine (the size of the device's register bank) what is the default size of a device's CSR bank? Can I have a set of CSRs that occupy 64k of QBUS space? Thanks in advance for any and all information. Greg King Verdix Corporation 14130-A Sullyfield Circle Chantilly, VA 22021 703-378-7600 x288 king@verdix.com