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- Newsgroups: comp.sys.laptops
- Path: sparky!uunet!nwnexus!prangba
- From: prangba@halcyon.com (Bruce Prang)
- Subject: Re: Floppy format of Japanese NEC PC-9800 Notebook
- Message-ID: <1992Dec23.170112.17818@nwnexus.WA.COM>
- Keywords: Japanese, NEC, PC-98, Notebook
- Sender: sso@nwnexus.WA.COM (System Security Officer)
- Organization: Northwest Nexus Inc. (206) 455-3505
- References: <3539@accucx.cc.ruu.nl>
- Date: Wed, 23 Dec 1992 17:01:12 GMT
- Lines: 43
-
- mmeijer@accucx.cc.ruu.nl (Maarten Meijer) writes:
-
- >On behalf of a Japanese colleague at our university in the Netherlands
- >I would like to know if there's anyone who knows how to read or convert
- >floppies from a NEC PC-9801 NS/E Notebook computer with MS-DOS 3.3 on/to
- >a normal MS-DOS computer.
- >The floppy format of this special notebook (that can display not only
- >the English letters, but also Japanese characters) appears to be
- >unreadable in standard MS-DOS floppy drives (those that we use to call
- >NEC compatible ... ). Some people here suggested that it should be
- >readible on a Macintosh, but so far we didn't succeed.
-
- If my memory serves me correctly, the NEC 3.5" (I assume it is 3.5) is
- the "exact same" format as the 5.25" HD. That is the drive spins at 360
- rpms (not the 300rpm for US drives). The sector layout is also the same
- (15 512-byte). The only way to read these disk that I know of for sure
- is to replace the clock on the drive controller. This will change the
- data rate and make it "look" like the drive is spinning faster than it
- really is. This of course won't let you use US formated disks in the
- machine :) The other possible option is just a variation on the same
- theme. If some of multi-format floppy disk controller manufactures
- (Sysgen, MicroSolutions (i think)) allow you to controller the data rate
- by software you can do the same thing without having to modify a FDC.
-
- I don't remember the exact clock needed to achieve the new data rate but
- if your interested I can find out. Just mail me.
-
- >Another solution would be a serial cable (null modem) but even the
- >serial port doesn't seem to be standard RS-232. It's a female connector
- >instead of a male one, to just mention a detail.
-
- This is probably your best bet.
-
- >Any reaction or suggestion would be greatly appreciated. Thanks in
- >advance!
-
- Another possible option would be a data conversion company.
-
-
- --
- Bruce Prang
- prangba@halcyon.com
-
-