Just cleaning out storage and decided to sell my one-owner HP150B.
But first I need to make it work. It was working when I put it back in its boxes 20 +/- years ago.
But, I can't get past the pre-boot error message, "Power-on test failed 0004" or sometimes "0000c".
Anybody know these error messages? Or better yet, where I can get a list of power-on error messages?
> James Fogg wrote:
> > My interests stop at the "classic" Macs, of which the SE30 is the
> > height of engineering achievement (in my opinion).
> Why? I know a bit of the classic Mac engineering history
> thanks to Andy's retro website/book, but I know nothing of the SE30.
OK, neither do I (it's too late to argue). It is the last of the classic
Macs and has the greatest number of features and capabilities.
Okay, I pulled the power supply on the VT100 after replacing the two video
board components, only to find 3 resistors on the PSU burned out. I know I
should probably get a book on how to read a schematic (I will soon) but in
the meantime can someone tell me what these resistors are?
I copied a portion of the diagram image on page 23 of the VT100 found at:
If someone could tell me what resistor is what, that would be awesome.
Thanks again for everyone's help (and time)
made by Vermont Microsystems. Takes up 2 card slots,
like an IBM PGA card. Has on onboard 80188. Is VM
Yahoo! Mail - PC Magazine Editors' Choice 2005
I would suggest that you get your self up on
reading schematics. Resistors rarely just burn
up without there being some other cause. Just
replacing the resistors will most likely result
in more burnt resistors if it is powered up without
locating the reason for the resistors to burn
in the first place.
Many IC's and transistors show little to no visual
indications that they are shorted inside. I don't
know how one can find these without understanding
where the resistors are in the schematic and how
the resistors are being used.
>From: "Julian Wolfe" <fireflyst at earthlink.net>
>Okay, I pulled the power supply on the VT100 after replacing the two video
>board components, only to find 3 resistors on the PSU burned out. I know I
>should probably get a book on how to read a schematic (I will soon) but in
>the meantime can someone tell me what these resistors are?
>I copied a portion of the diagram image on page 23 of the VT100 found at:
>If someone could tell me what resistor is what, that would be awesome.
>Thanks again for everyone's help (and time)
I have a wire that is broken on the Berg connector that plugs into my
DLV12 controller for my RL01 drive. How do I remove one of the pins
>from the Berg connector so that I can reattach the broken wire? Is it
possible to repair these connectors or do I have to replace it?
>Subject: PDP-11/73 booting!
> From: David Betz <dbetz at xlisper.mv.com>
> Date: Tue, 15 Nov 2005 19:56:03 -0500
> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>I got my PDP-11/73 booting by connecting an RX02 drive to the system
>and using an RT-11 boot floppy. I've convinced myself that the 1.5mb
>of memory (two M8059s and a third party card) works and that the
>KDJ11-A CPU is working as well as the multi-function boot card
>(M8047) and the RX02 drive and controller (M8029).
>Unfortunately, I still can't access the RL01 drive. RT-11 sees the
>controller card but if I type "DIR RL0:", there is no indication that
the RL02 is accessed by the DL: driver. is there a DL.sys on the disk?
>the drive is even accessed. The disk seems to spin up and the ready
>light comes on on the drive but I don't seem to be able to access the
>drive from RT-11. I've also tried using a scratch pack and typing
>"INIT DL0:" but that doesn't work either. Does anyone have any idea
>what might cause this kind of behavior? Also, can anyone make me a
>bootable RX02 disk with the RL01 diagnostics on it? I can supply the
Assuming the interrupt grant is good (no empty slots between the cpu and
the RLV controller. the cables are good and connected correctly. No fault
light and When the load bitton is in you get spin up and a white load lamp.
It should work.
On Nov 19 2005, 9:50, Barry Watzman wrote:
> I have a chart of paper tape hole patterns for all 128 characters,
> shows the LSB (bit zero, although the chart numbers them 1-8) as the
> hole on the 3-hole side, with the bits in order 0 to 7 (or 1 to 8).
> However, one question, this chart shows the high-order bit (parity
> punched for every character, no exceptions. Was that a standard
> in sending ascii files to paper tape?
It was for DEC, at least with PDP-8s. I don't know about anyone else.
Pete Peter Turnbull
University of York
Not funny VAX.
I still use and am a fan of IBM PS/2's. So are a couple others on
here. A few still use IBM RS6000 machines and one or two use
AS/400's. Please watch the generalizations...
-John Boffemmyer IV
At 09:20 PM 11/28/2005, you wrote:
> > BIG GOTCHA- you need to make sure your machine comes with
> not only the OS, but also the mashine-specific intermediate layer
> software. Unless you have a friend at IBM, they may be happy to
> give you a replacement in return for much cash, or they may do the
> snooty Maitre d' thing . . . and OS/400 is rumored to lock itself
> after a certain period of inactivity as well.
>You have found the reason why there are so many DEC fans and no IBM
>fans on the mailing list.
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