Just did a little research on WPS-8 floppy format, just to satisfy my curiosity.
WPS-8 stores data on an RX-50 as a series of 12-bit words, using two bytes on the floppy to store a word. The low 8 bits goes into the 1st byte, and the upper 4 go into the second btype. 4 bits in the secnd byte are unused. It stores two 6-bit characters in each word. To convert it to asCII, mask off the 6 bits and add 31. Character 63 (ASCII 94) is a command character, and following character(s) specify the command. Some other characters are also special '[' and ']' toggle upper/lower case. Looking at a WPS-8 floppy in raw mode on a PC would not display anything readable, so this guys floppy is obviously not wps-8,and if all pdp-8s systems handled floppies the same way (as 12 bit words), it probabl isn't from any psp-8. On Wed, Jul 12, 2017 at 4:33 AM, Johnny Billquist <[email protected]> wrote: > On 2017-07-12 02:04, Timothe Litt wrote: > >> On 11-Jul-17 18:02, Johnny Billquist wrote: >> >>> On 2017-07-11 21:09, Timothe Litt wrote: >>> >>>> VMS mount /over=id /foreign is the quickest way to identify files-11 and >>>> RT disks. FILES-11 can be read directly; use EXCHANGE for RT-11. Once >>>> you have the disk mounted on VMS, you can network it to wherever you >>>> like. >>>> >>> >>> Similar story if you have RSX. I might have forgotten a thing or two >>> about VMS here, but I would have thought /OVER=ID/FOREIGN would not >>> then let you access the disk in the direct way if it is Files-11. >>> >> I was suggesting the easiest way to IDENTIFY the media. /FOREIGN will >> dump the filesystem type when it looks for a HOM block. Once you know >> that, you use the appropriate command / utility to access that type. >> >> To access FILES-11 on VMS, you don't use /FOREIGN, just mount (though >> /over=id will allow a private mount without knowing the volume label.) >> > > Ok. Fair enough. I thought you meant that you'd mount it that way, and > then go at it. > > MOUNT and EXCHANGE details are available from HELP and the manuals. >> >> VMS has, arguably, the most filesystem support and tools for this. But >> OS choice is a religion. Use whatever you believe in & have available; >> there is no point in arguing religion. >> > > True. And, as with any religion, there is no point of even having an > argument. Whatever works is good enough. > > Of course, if the OP is more interested in the result than the process, >> he can probably get one of us to extract the one file for him... >> > > Also true. I'm sure plenty of people would help, if asked. > > > Johnny > > -- > Johnny Billquist || "I'm on a bus > || on a psychedelic trip > email: [email protected] || Reading murder books > pdp is alive! || tryin' to stay hip" - B. Idol > _______________________________________________ > Simh mailing list > [email protected] > http://mailman.trailing-edge.com/mailman/listinfo/simh >
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