From: Wilber Williams Newsgroups: alt.sys.pdp10 Subject: Re: KA10 paper tape reader Date: Wed, 06 Feb 2002 11:02:36 +1000 Organization: The University of Queensland Lines: 42 Message-ID: <3C6080AC.A9E468FF@its.uq.edu.au> References: <60rr4ugmk9ubv7mfnk4tuiu85li24u4j0k@4ax.com> <3C4DFC9E.1BF0C88E@bartek.dontspamme.net> <3C4F5576.475D89BD@bartek.dontspamme.net> <3C4F7247.FDE5224F@Empire.Net> <3C4F7869.6451C4F8@bartek.dontspamme.net> <3C500360.A00B8C00@bartek.dontspamme.net> <3C502D04.73678C85@bartek.dontspamme.net> <51f05u01lldtscr5v4pfgv5j58c18oe8cu@4ax.com> <3C503F7C.CF01F739@bartek.dontspamme.net> <3C509844.BAAE62A5@bartek.dontspamme.net> <3C50CE97.1A941261@Empire.Net> NNTP-Posting-Host: chook.cc.uq.edu.au Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: bunyip.cc.uq.edu.au 1012957491 10222 130.102.128.100 (6 Feb 2002 01:04:51 GMT) X-Complaints-To: news@uq.edu.au NNTP-Posting-Date: 6 Feb 2002 01:04:51 GMT X-Mailer: Mozilla 4.78 [en] (Win98; U) X-Accept-Language: en Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news-ge.switch.ch!enews.sgi.com!harbinger.cc.monash.edu.au!bunyip.cc.uq.edu.au!not-for-mail Xref: chonsp.franklin.ch alt.sys.pdp10:10221 Try - http://chook.cc.uq.edu.au/DEC-9L-H2AA-D%20PC09C%20High%20Speed%20Paper%20Tape%20Reader%20and%20Punch%20Manual.pdf for more information on the paper tape. Wilber John Sauter wrote: > > Arthur Krewat wrote: > > The high-speed paper tape reader on the KA10 console - it > was parallel or serial? And if serial how fast? > > John Sauter responded: > > The terms "serial" and "parallel" don't apply very well > to the KA10's paper tape reader. It had two input modes. > In one mode it would read an 8-bit frame from the tape > in response to a DATAI instruction from the KA10. > In the other mode it would search the tape for an 8-bit > frame with the eighth bit punched. It would read this > frame and the five following frames, then return bits > 1 to 6 of the six frames as a 36-bit word in response > to a DATAI instruction. It was this mode, which I > believe was called "binary mode," that was used by > the RIM loader to read the bootstrap into memory. > The searching feature meant you could position the > bootstrap tape anywhere before the beginning of data. > > Without checking the manual, I believe the paper tape > reader operated at 300 frames per second. > John Sauter (J_Sauter@Empire.Net) -- Wilber Associate Director, Networks And Design Services +----------------------------------------------------------------------+ |Wilber WILLIAMS w.williams@its.uq.edu.au | | Telephone : +61 7 3365 4232 | |ITS The University of Queensland Facsimile : +61 7 3365 7539 | |Brisbane Qld 4072 AUSTRALIA Mobile : +61 412 210 063 | +----------------------------------------------------------------------+