The Perfect Computer - 36 bits?
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From: Brian Inglis on 15 Apr 2007 17:11 On 15 Apr 2007 15:06:37 -0400 in alt.folklore.computers, Rich Alderson <news(a)alderson.users.panix.com> wrote: >jmfbahciv(a)aol.com writes: > >[talking at cross purposes] > >The *hard wired* numbers the original poster was talking about are things like >tracks per cylinder, sectors per track, etc. etc., on disk drives for example. > >MONGEN does not put any of that into the monitor, ma'am. Is that in the monitor? If so, where? Are there publicly available sources? -- Thanks. Take care, Brian Inglis Calgary, Alberta, Canada Brian.Inglis(a)CSi.com (Brian[dot]Inglis{at}SystematicSW[dot]ab[dot]ca) fake address use address above to reply
From: Rich Alderson on 15 Apr 2007 20:41 Brian Inglis <Brian.Inglis(a)SystematicSW.Invalid> writes: > On 15 Apr 2007 15:06:37 -0400 in alt.folklore.computers, Rich Alderson > <news(a)alderson.users.panix.com> wrote: >> jmfbahciv(a)aol.com writes: >> [talking at cross purposes] >> The *hard wired* numbers the original poster was talking about are things >> like tracks per cylinder, sectors per track, etc. etc., on disk drives for >> example. >> MONGEN does not put any of that into the monitor, ma'am. > Is that in the monitor? If so, where? Are there publicly available > sources? Yes, it is, in the modules dealing with physical I/O. Tops-10 and Tops-20 sources are to found at http://pdp-10.trailing-edge.com . -- Rich Alderson | /"\ ASCII ribbon | news(a)alderson.users.panix.com | \ / campaign against | "You get what anybody gets. You get a lifetime." | x HTML mail and | --Death, of the Endless | / \ postings |
From: jmfbahciv on 16 Apr 2007 06:42 In article <865523h56mn3lt7jccldh1g3q2nl6bk1f9(a)4ax.com>, Brian Inglis <Brian.Inglis(a)SystematicSW.Invalid> wrote: >On 15 Apr 2007 15:06:37 -0400 in alt.folklore.computers, Rich Alderson ><news(a)alderson.users.panix.com> wrote: > >>jmfbahciv(a)aol.com writes: >> >>[talking at cross purposes] >> >>The *hard wired* numbers the original poster was talking about are things like >>tracks per cylinder, sectors per track, etc. etc., on disk drives for example. >> >>MONGEN does not put any of that into the monitor, ma'am. > >Is that in the monitor? If so, where? Are there publicly available >sources? > Trailing-edge [bless that man] has several full releases of our tapes. /BAH
From: jmfbahciv on 16 Apr 2007 07:06 In article <mddtzvh31aa.fsf(a)panix5.panix.com>, Rich Alderson <news(a)alderson.users.panix.com> wrote: >jmfbahciv(a)aol.com writes: > >[talking at cross purposes] > >The *hard wired* numbers the original poster was talking about are things like >tracks per cylinder, sectors per track, etc. etc., on disk drives for example. I thought we were talking about device codes, etc. > >MONGEN does not put any of that into the monitor, ma'am. Have you read COMMON.MAC, COMDEV.MAC, and COMMOD.MAC? Once these (plus S and F) are assembled, we could assemple all the other modules in parrallel.
From: David Powell on 16 Apr 2007 13:32
In article <5jp6f4-d3b.ln1(a)osl016lin.hda.hydro.com>, Terje Mathisen <terje.mathisen(a)hda.hydro.com> in alt.folklore.computers wrote: >Eric Smith wrote: >> nmm1(a)cus.cam.ac.uk (Nick Maclaren) writes: >>> I know quite a few people who used Z80s for that, and they >>> never really cut the mustard for mission-critical tasks >> >> I saw quite a few Z80s used for mission-critical critical tasks. > >Back in 1981 we had 12 (or 16?) channel 'Acoustic Emission' gear using a >dedicated Z80 per channel, this was used for monitoring stuff like >building platforms, offshore oil rigs and other relatively >'mission-critical' applications. > We had both, 11/23 with a few 4 channel async cards as data concentrators / protocol convertors to multiple Z80s as embedded real-time controllers. Not much difference in hardware reliability after infant mortality, provided appropriate PSUs and fans. Most of the early Z80 failures were PSU, charge-pumps from the +5 for the RS232 drivers that slowly declined from 10V ish to not much over a couple of years. Software reliability for the 11steadily improved over the years, easy to investigate post-mortem, and add robustness where necessary. The Z80s were just replaced, usually without investigation. >> More Z80s have been used for LIFE-critical tasks than the total >> number of PDP-11 computers manufactured. > >Almost certainly true. > Not surprising, after about 1979, every DEC sales office had painted on the wall. "Thirty-two bits good, sixteen bits bad." Regards, David P. |