Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail From: Jack Strangio Newsgroups: comp.os.linux.misc,comp.sys.raspberry-pi Subject: Re: Keeping 'order' without RTC. Date: Sun, 8 Mar 2015 02:38:38 GMT Organization: North Star Horizon Builders Club Lines: 21 Message-ID: References: <1367529749447367530.483338mjmahon-aol.com@news.giganews.com> Injection-Info: mx02.eternal-september.org; posting-host="c01c6455a1e61e7afbd705a91fe2ff93"; logging-data="7430"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18+U0N40pUD/PgpiTK/xlYro29YTFENM28=" X-Newsreader: TASS News Reader 3.7.2 jvs [linux] Cancel-Lock: sha1:aDw4n1QV0oIdQdjI5VUz10R2cfg= Xref: csiph.com comp.os.linux.misc:13978 Michael J. Mahon writes: > > FWIW, this was the same single-density, single-sided diskette standard that > Woz used with Group Coded Recording to get (eventually) 143K bytes on a > side (by using a clever state machine to do clock recovery)--at the same > bit density. > I don't think so. Mine was a standard FM (later superseded by the double-density MFM 512 bytes per sector) format: 35 tracks, 10 sectors, 256 bytes per sector, hard-sectored. (North Star MDS using fairly simple hardware) Woz's system was completely different, being software-intensive utilising the CPU instead of simple hardware,if I remember correctly. Jack -- "I'm a home-loving girl. And that's where I wish I was." "At home ..." "Loving." - Laugh-In, 1968