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From: phil@Shiva.COM (Phil Budne)
Newsgroups: comp.sys.nsc.32k
Subject: Re:  Intel-based floppy controller
Message-ID: <9011280218.AA24024@Shiva.COM>
Date: 28 Nov 90 02:18:03 GMT
Sender: news@daver.bungi.com
Lines: 34
Approved: news@daver.bungi.com


	Date: Thu, 22 Mar 90 16:44:03 EST
	From: Jerry Callen <jcallen@maxzilla.encore.com>
	To: pc532@daver.bungi.com
	Subject: Intel-based floppy controller

	Well, I give up. the HD64180 is proving to be hard to get and
	expensive (at least $30), so I'm dumping it in favor of an,
	er, well, ah, an Intel chip. (cough, choke....) 

I know Jerry ran out of gas on this project but...

I've recently found out about the Zilog Z80180 (aka Z180) which is a
superintegrated chip with an enchanced (20% faster at the same clock
speed) Z80 core w/ OSC, plus an MMU which allows bank access to 1MB, 2
asynch channels (with baud rate generators), 2 DMA channels, 2 16 bit
timers and a high speed clocked serial I/O port for interprocessor
communication.  It even has an HD64180 compatability mode bit!  I've
seen released products which use it.  Its made with 6, 8 and 10MHz(!!)
system clocks, DIP 64, PLCC 68 and QFP80 packages.  Cost is about $10.

The Z181 "SAC" Smart Access Controller adds half an SCC (one channel)
an Z80 CTC (4 8 bit counter/timers), 2 8 bit general purpose parallel
I/O ports and two chip select signals in a 100 pin QFP! It is
available with a 10Mhz system clock. Cost: about $15.

-Phil

                                    ........o
Philip Budne                        :   o---+----o      Shiva Corporation
FastPath Project Leader             :       o    |      1 Cambridge Center
                                    :     Shiva  |      Cambridge, Ma 02142
Internet: phil@Shiva.COM            :        .   |      Tel (617) 252-6300
formerly budd@{bu-it.bu.edu,MIT-AI} :        o---o      Fax (617) 252-6852