dana@locus.com (Dana H. Myers) (04/24/91)
Last year, I discussed the idea of a packet-assembler-disassembler on rec.ham-radio.packet (now rec.radio.amateur.packet) which uses a SCSI link to the host. This is a project I've had on the back burner since then, mostly 'cause I wasn't looking very hard for data on SCSI interface chips. Now, while perusing some Zilog literature, I discover they offer a chip which combines the Z85C30 SCC (ubiquitous in packet radio) and the Z53C80 SCSI. The Z85C30 SCC is a very well known quantity; however I know nearly nothing about the Z53C80. Are there any readers who have used either the Z85C80 SCSCI (the combo) or the Z53C80 SCSI? I'd like to know about this SCSI controller, particularly any difficulties with the part or availability. Thanks, Dana -- * Dana H. Myers KK6JQ | Views expressed here are * * (213) 337-5136 | mine and do not necessarily * * dana@locus.com | reflect those of my employer *
freed@fraktur.adobe.com (Alex Freed) (04/25/91)
I'm almost sure (99.9%) that the Z53C80 is the same as a very well known NCR SCSI chip - 5380. It's a _standard_ SCSI device and quite well behaved. One thought - both chips come in 40 pin cases, so the combination might be hard to use: I mean PGA is not very nice for home projects. -- |--------------------------------------------------------------------------- | -Alex Freed (The opinions expressed are my own. | However everyone is entitled to them.) -- |--------------------------------------------------------------------------- | -Alex Freed (The opinions expressed are my own. | However everyone is entitled to them.)
<LEEK@QUCDN.QueensU.CA> (04/25/91)
In article <1991Apr24.041843.2822461@locus.com>, dana@locus.com (Dana H. Myers) says: > >chips. Now, while perusing some Zilog literature, I discover they offer a >chip which combines the Z85C30 SCC (ubiquitous in packet radio) and the >Z53C80 SCSI. The Z85C30 SCC is a very well known quantity; however I >know nearly nothing about the Z53C80. Zilog has a databook for telcom chips which has both chips inside. I got the data book a couple of months ago. > > Are there any readers who have used either the Z85C80 SCSCI (the combo) >or the Z53C80 SCSI? I'd like to know about this SCSI controller, particularly >any difficulties with the part or availability. I am in the process of building a SCSI controller for my Commodore Amiga. I happens to be using a NCR 5380. I got the part off Active Components, a mail ordering place for about $13 Canadian a piece. You can get the data sheets for the Z5380 from Zilog. According to Zilog's data sheet, it is identical to the generic 5380 part. You might want to get hold of the SCSI specs some how as the data sheets do not explain about SCSI too much. I got my SCSI spec from Seagate for free. Email me if you want the address of Seagate and literature# to order. I am at work (supposed to be anyway) and I don't have them handy. If you need more info/help, please let me know. > >Thanks, >Dana > >-- > * Dana H. Myers KK6JQ | Views expressed here are * > * (213) 337-5136 | mine and do not necessarily * > * dana@locus.com | reflect those of my employer * K. C. Lee Elec. Eng. Grad. Student
ts@cup.portal.com (Tim W Smith) (05/01/91)
AAAARRRRRRGGGGGGHHHHHHHH!!!!! Have you ever tried to work with both an 8530 and a 5380 and NOT get the names confused when talking to other people? Why did they have to pick these two chips? Tim Smith
michael@otago.ac.nz (05/03/91)
In article <41874@cup.portal.com>, ts@cup.portal.com (Tim W Smith) writes: > AAAARRRRRRGGGGGGHHHHHHHH!!!!! Have you ever tried to work with both an > 8530 and a 5380 and NOT get the names confused when talking to other > people? Why did they have to pick these two chips? Ah. Open the back of virtually any model of Apple Macintosh. See the NCR 53C80 and the Z85C30. Consider the vast quantities of these chips that Apple uses. Would Apple be interested in one chip that did both jobs? Darn right they would... Michael(tm) Hamel, Computing Services Centre, University of Otago, New Zealand CORRIECRAVIE (n.) To avert the horrors of corrievorrie (q.v.) corriecravie is usually employed. This is the cowardly but highly skilled process by which both protagonists continue to approach while keeping up the pretence that they haven't noticed each other - by staring furiously into a notebook, or studying the walls closely as if in a mood of deep irritation.