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- Newsgroups: comp.unix.sysv386
- Path: sparky!uunet!decwrl!access.usask.ca!regina!udevdiv!roe
- From: roe@Unibase.SK.CA (Roe Peterson)
- Subject: Re: Anyone heard of the BocaBoard?
- Message-ID: <1992Aug22.230959.9649@Unibase.SK.CA>
- Organization: Unibase Telecom Ltd.
- References: <2A95BEE8.5424@telly.on.ca>
- Date: Sat, 22 Aug 1992 23:09:59 GMT
- Lines: 28
-
- evan@telly.on.ca (Evan Leibovitch) writes:
-
-
- >Its UARTs -- two of them -- are ST16C554s. The brochure says "each
- >ST16C554 chip is equivalent to four NS16C550s with FIFO buffering".
-
- >I/O addresses are assigned in blocks of 0x40 10-bit addresses based
- >at the following start addresses:
-
- >000 040 080 0C0 100 140 180 1C0
- >200 240 280 2C0 300 340 380 3C0
-
- >The interrupt switchable to 3,4,5,7,10,11,12,15
- >Would SAS or FAS be possible on all eight ports of this thing? The
- >8-port card sells for a dealer price of under $130US. A four-port
- >version is under $90.
-
- At first glance, I would say not. 64 I/O addresses for 8 ports would
- appear to be double the number required for a simple "lets' put
- 8 16550's in a row".
-
- However, if the 16C554 is reasonably close a 4x16550 implementation,
- I should be able to hack SAS to use it given a simple data sheet for the
- chip. Anybody know where I can get one?
-
- >Worth it?
-
- Yep.
-