test-drb March 2008

test-drb@ccmp.vtda.org

209 participants
369 discussions

by lynchaj＠yahoo.com

On Sunday 23 March 2008 18:06, Andrew Lynch wrote: > Hi, > > I found a mystery chip in a pile of stuff. Apparently, it was an AWARD > BIOS in a former life. I can read it in my EPROM programmer and it is read > compatible with a 27C512 (64Kx8 EPROM). The contents are consistent with > an AWARD BIOS for a PC of some sort. > > However, the chip itself is rather unusual. There is no EPROM quartz > window, the manufacturer symbol is a triangle, and the number is unlike > anything I have seen before. Worse yet, I get no helpful hints on GOOGLE > when I try. Maybe this'll help: http://www.classiccmp.org/rtellason/logos/semiconductorlogos.html ? A triangle sounds like Matsushita, maybe. > The chip number is 608C62. I am guessing it is either a One Time PROM or a > mask ROM. Has anyone heard of this or know what family it is from? I've not heard of that one before. > I am hoping it was a FLASH ROM or EEPROM but I can't seem to find anything > on this chip. Any hints or help much appreciated! > > Andrew Lynch -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin -----REPLY----- Hi Roy, Thanks for the reply. I reviewed your page of chip logos and the Hundai/Hynix triangle seems the closest but even then not exact. The logo is a perfect equilateral triangle outline. Thanks! Andrew Lynch

16 years, 9 months

Emailing: mystery chip 608C62.htm

by lynchaj＠yahoo.com

On Sunday 23 March 2008 18:06, Andrew Lynch wrote: > Hi, > > I found a mystery chip in a pile of stuff. Apparently, it was an AWARD > BIOS in a former life. I can read it in my EPROM programmer and it is read > compatible with a 27C512 (64Kx8 EPROM). The contents are consistent with > an AWARD BIOS for a PC of some sort. > > However, the chip itself is rather unusual. There is no EPROM quartz > window, the manufacturer symbol is a triangle, and the number is unlike > anything I have seen before. Worse yet, I get no helpful hints on GOOGLE > when I try. > > The chip number is 608C62. I am guessing it is either a One Time PROM or a > mask ROM. Has anyone heard of this or know what family it is from? > I found it on www.datasheets.org.uk - it's listed as an equivalent to a 6264 static ram, which sounds plausible... Julian > I am hoping it was a FLASH ROM or EEPROM but I can't seem to find anything > on this chip. Any hints or help much appreciated! > > Andrew Lynch > -----REPLY----- Hi Julian, Thanks for looking and the reply. That is the first place I went after Google looking for a datasheet. The only thing they said though was that I was not the only person who has searched for the device in the past. The chip is some sort of ROM because I can read the contents with my EPROM programmer in 27C512 mode. No luck on what it is though... At least it is not unique but it is starting to look a lot like a Mask ROM to me. Thanks! Andrew Lynch

16 years, 9 months

Emailing: mystery chip 608C62.htm

by lynchaj＠yahoo.com

> Date: Mon, 24 Mar 2008 20:23:52 +0000 > From: Julian > I found it on www.datasheets.org.uk - it's listed as an equivalent to a > 6264 static ram, which sounds plausible... Not if it already contains a copy of a BIOS. If you take a closer look, you'll see that the referencing page is merely a search list, not a pointer to equivalents. Had me fooled too. Cheers, Chuck -----REPLY----- Hi Chuck! Thanks for the reply. Well, no luck yet but I will try your idea of seeing if my EPROM programmer can identify it. The date code in BIOS indicates about 1994 vintage or so. I am not sure how to read the chips date code though. I will fire up the EPROM programmer and see if it can identify the chip. Maybe we'll get lucky... Thanks! Andrew Lynch

16 years, 9 months

advent sources?

by tiggerlasv＠aim.com

I'd love to find an Advent fortran source that compiles on the PDP-11 under RSTS/E. I've run across about 20 different versions in various places on-line, but haven't been able to get any of them to compile successfully under Fortran-IV or Fortran-77. . . Zane -- When you say "DND", do you mean DND, as in Lamorte/Shvenk's Lair style DND, or do you mean DUNGEO, as in "You are standing in an open field west of a small white house." ? T

16 years, 9 months

NRI 832 restoration.

by davis＠saw.net

I've started restoring a National Radio Institute (remember the 60's pop-sci ads?) model 832 computer.The system was functional when I received it about 15 years ago, but it's showing it's age now.This system is very fragile, All the signal connection use 22-24? gauge kynar, tack soldered to the edges of machine screw sockets, the sockets being used to test and experiment with the dozen+ circuit boards constructed during the training program. I've looked on the net and can find close to nothing on this machine. Does anyone have schematics?or do I need to tear this thing down and draw up a decent print? Thanks. Jim.

16 years, 9 months

cassette interface of Panasonic HHC

by eric＠brouhaha.com

Can anyone provide a summary of how to use the cassette interface on a Panasonic HHC (or Quasar, etc.)? I don't have the relevant manuals. I expect that there must be some way to transfer files between memory (either internal RAM or external RAM modules) and the cassette, but it's not obvious how to do it, and the I/O menu doesn't list the cassette interface. Thanks, Eric

16 years, 9 months

End of restoration of the early French computer SEREL ODP-505 (germanium CPU)

by pichotjm＠free.fr

Hi,[back to home]> It is difficult for me to give a precise date. I don't have any > manufacturing notes/schematics about this machine. Published > computer lists > indicate 1965. But they don't know my work. It seems that the > machine began > a military career, before a commercial one. (My machine has a military > color, and a customs seal)And I think that the 1965 date is only for > commercial use (not reserved to military).Date codes on PCBs range > from 1962 > to 1964. It's why I think 1964. But the machine was used for > manufacturing > problems debugging / ECN. 1964 may be the date of the last ECN... > So the > date is between 1962 and 1965. | Thank. I presume ECN means PCB = Printed Circuit Board. ECN: Engineering change notice. Indicates revision of PCB. > |It is tiny compared with my Germanium machine > (ICT 1301) which weighs > |five tons. It has the same clock speed but is quite a bit slower, so > |I guess it is earlier than mine. But maybe the emphasis of the design > |was miniaturisation and the designers traded speed for size. > | | I should have made it clear that it is the 1301 which is the faster | of the two. For example a 48 bit decimal (i.e. 12 digits) add to / | subtract from a register takes 21 microseconds. The ODP-505 is a pure binary machine, not designed for arithmetics, statistical purposes or BCD computations.It is a real time (!!!) computer. Get some datas (voltages, frequencies, switch states, motor speed, temperature...) compare to thresholds or values, and speed up / slow down motor, or move a cadmium bar (?) in a nuclear reactor...> What is the manufacturing date of your ICT 1301? | Actually I have two. Serial number 6 was the first one to be sold and | was installed in 1962 and it is this one which is assembled and | works, though not all the peripherals are functional. Serial number | 75 I would guess was made in 1963. I have a few parts of serial | number 155, which I would think would be from 1965 when the machines | were largely replaced by the ICT 1900 series. Designing of the | machines was started in the late 1950s, and many of the engineering | drawings have initial revisions from that period. | The architecture of your machine reminds me of the first machine I | was allowed to operate. It was an 18 bit binary machine, it had 8k of | memory built in, expandable with external modules and was made by the | Airborne Computing Division (ACD) of Elliotts, it was an Elliott 920B | and was a compact, flyable version of the commercial Elliott 903. | There had been an earlier model 920A which I think would have been | Germanium and was roughly the size and shape of a carpenters work | bench. This may have been contemporary with your earlier machine I | think. Unfortunately I never saw one in the flesh, but there was a | bench in the computer room which I found out later, was the empty | chassis of a 920A. Behind the bench was a large panel full of | electrical 'chocolate strip' connectors where the analogue and | digital input and output signals of the 920A could be connected up. | Apparently some of the analogue outputs had been connected up to an | oscilloscope to provide a visual display unit, though it used a fair | bit of processor time to keep it refreshed, even with the long | persistence phosphor of an oscilloscope. The panel had been covered | with board with pegs to hold mylar paper tapes and until the day it | was scrapped I had not seen what was behind it. Very interesting!There are some video connector in the earlier machine and the Serel companywas specialized in high tech video solutions. I have read somewhere in docs, thatthis computer have a screen output...I have found, last week a small notice describing microprogramming on ODP-505.http://pichotjm.free.fr/Serel/ODP505/MicroProgrammation/MicroProgrammation.html(doc found in photomultiplier doc!)I have found commercial document describing displays and analog memories...I don't know the date... (1970?) I have to study these documents... > I have a > earlier machine from the same company SEREL, named OA-1001. Built in > 1959/1960.I need to restore it. It lays on the floor (horizontal > position)... The blue one > here:http://pichotjm.free.fr/Serel/Photos/Photos.htmlI will start > restoring > next month (with the Sun!) | What is involved in the restoration? Do you intend to make it work, | this would be very hard without the schematics.As you know, i am alone, here. I want to make an esthetic restoration:Photos and notes, dismantle, photos and notes, wash, dry, fix the rust, protect with Rustol, photos an reassemble. I hope to be capable to do that... may be one year, may be two... May be some reverse engineering to get 2 or 3 schematics. (need one week for a board! I have 2 boards in process...)JM Pichot

16 years, 9 months

End of restoration of the early French computer SEREL ODP-505 (germanium CPU)

by pichotjm＠free.fr

|pichotjm wrote: | |> Hi, Be carefull! fr.comp.ordinosaures is in french. | |And this is somehow dangerous for my health :-) | |> The best way for you, |> would be to subscribe to the news server Astraweb.com. You will have |> to pay | |Actually an unrelated google search showed up "ordinosaure" on |the French wikipedia and the very next link was google groups |(or dejanews as I still like to think of it). | |56000 messages ... I may be some time ... | |Antonio [back to home] Hi, 'Ordinosaure' is a beautiful new word composed with 'Ordinateur' (computer) and Dinosaure. We could translate it by 'computosaure'. It has about the same definition as in this group: older than 10 years. (I would prefer more than 20 or 30 years, to minimise the use of the word...) In 56000 messages, you will find a lot without interest! If you need some french url, i can make a copy of my book-mark. JMP

16 years, 9 months

Loading an OS onto a real PDP-11 - not an emulator

by tiggerlasv＠aim.com

> With dual RL01's you're going to be fairly limited on space, > I don't know how old of a version of RSTS/E you'd need > to go with in order to get it to fit. RT-11 is a good choice > for a system with that limited of disk space. RSTS/E V7.0-07 will happily reside on a single RL01 pack. Depending on the program packages you install, you could wind up with as much as 3MB of space free. Add another RL01 as a public pack, and you're "living large". ;-) His real limitation will be the amount of memory on the 11/34. If he's got 256K, then he'd be able to run between 2 - 4 maximum size jobs without swapping, depending on the size he sets for SWAPMAX. T

16 years, 9 months

608C62

by cclist＠sydex.com

> Date: Sun, 23 Mar 2008 18:06:27 -0400 > From: "Andrew Lynch" > Subject: mystery chip > I found a mystery chip in a pile of stuff. Apparently, it was an AWARD > BIOS in a former life. I can read it in my EPROM programmer and it is > read compatible with a 27C512 (64Kx8 EPROM). The contents are consistent > with an AWARD BIOS for a PC of some sort. Well, if it's an EPROM (OTP or flash), it should have a "silicon signature"/"intelligent identifier" readable by your EPROM programmer. Does your programmer have an auto-identify capability? Cheers, Chuck

16 years, 9 months

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test-drb March 2008