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  1. You'll need to experiment a little then. You will...

    You'll need to experiment a little then. You will need to thin it until it flows freely. Maybe start by thinning by a 10:1 paint:thinner ratio and see how that changes how it flows as you pour it...
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    Can you post the contents of the configuration...

    Can you post the contents of the configuration file you are using?
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    Be sure to remove any devices from your kernel...

    Be sure to remove any devices from your kernel configuration that you don't need.
    Here are the makefile definitions from my 11/73:

    CONF= scb.o \
    mch_backup.o mch_click.o mch_copy.o...
  4. Are there any instructions in the sprayer you...

    Are there any instructions in the sprayer you have? Obviously you need the paint to flow freely up the intake tube through the nozzle. How viscous is the undiluted paint?
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    I think there is a different makefile for the net...

    I think there is a different makefile for the net kernel, did you start with that? Did you adjust the overlay segment allocation of .o files? Have a look at this old newsgroup article and see if this...
  6. Make sure the thinner you select doesn't cause...

    Make sure the thinner you select doesn't cause the plastic case material to fall apart. Be sure to test it on a suitable "inconspicuous location" before you thin the paint. The amount you need...
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    Probably because the >>> prompt is not a Unix...

    Probably because the >>> prompt is not a Unix prompt, but the Alpha boot ROM. Have you been able to determine if there is a "single user" style boot available for those printer controllers? Why do...
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    Yes, that will work, for CPUs without a serial...

    Yes, that will work, for CPUs without a serial port you will need a board that is capable of acting as the standard console port interface. You may find it useful to have an Ethernet interface also.
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    All unused inputs must be tied to an appropriate...

    All unused inputs must be tied to an appropriate logic level. You could use a higher value resistor if you have some handy, the idea is to stop noise from entering via the input pin.

    If the open...
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    I have an RRD45 in my 4000/60. This post says it...

    I have an RRD45 in my 4000/60. This post says it is likely a Toshiba CDROM that supports 512 byte sectors....
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    Have you seen these documents? ...

    Have you seen these documents?

    EL-00160-00-0_A_DEC_STD_160_LSI-11_Bus_Specification_Sep91.pdf
    PDP11_BusHandbook1979.pdf
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    I found this with a search that turned up some...

    I found this with a search that turned up some discussion on comp.os.vms: https://training.vmssoftware.com/hobbyist/?fbclid=IwAR2Fen_xpZ9EKGsI4ERi9Pzii-HJkwGXJLVNxLn97SDX7v5OTUnu2S9-NPQ but it seems...
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    This is why when requests for purchase...

    This is why when requests for purchase procurements are performed, it is common for the requesting organization to provide sample codes to be run on the vendor's suggested configuration, and the...
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    It is best if you stop thinking of this system as...

    It is best if you stop thinking of this system as an 11/34. There is almost nothing left that is recognizable as an 11/34 except for the enclosure and the front panel. A J11 CPU will only look at the...
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    Good news. The headphone jack is used as a switch...

    Good news. The headphone jack is used as a switch to lower the drive level when a plug is inserted into the jack to avoid overdriving headphones. When there is no plug inserted, there are two...
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    If UM11 (LM380) was weak for some reason, you...

    If UM11 (LM380) was weak for some reason, you would likely get reasonable volume in headphones but not the speaker.

    You could test SR74 (1K) and SR75 (560) to see if they have their proper values,...
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    Have you tried disconnecting and reconnecting the...

    Have you tried disconnecting and reconnecting the speaker connector from the motherboard? Perhaps there is some corrosion on the connector pins.
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    The KDJ11-A manual (EK-KDJ1A-UG-001) states in...

    The KDJ11-A manual (EK-KDJ1A-UG-001) states in section 2.9.1 that the backplanes, memory and I/O devices must support 22-bit addressing. Section 2.9.2 states that if memory or memory addressed...
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    https://blog.toggl.com/mars-software-development/

    https://blog.toggl.com/mars-software-development/
  20. Oh, sorry, it is the Basic prompt. Like I said...

    Oh, sorry, it is the Basic prompt. Like I said I'm not very familiar with the Apple II series yet.
  21. I have the 658-4081 model IIgs keyboard on a ROM...

    I have the 658-4081 model IIgs keyboard on a ROM 1 IIgs, and today it seems to be behaving pretty reliably for the Ctrl-Apple-Reset reset operation. I've seen times in the past where it dropped into...
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    https://www.mouser.com/Connectors/D-Sub-Connectors...

    https://www.mouser.com/Connectors/D-Sub-Connectors/_/N-9gxxm?P=1ytcy2g...
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    Looking at Digikey and Mouser, the 19 pin D-sub...

    Looking at Digikey and Mouser, the 19 pin D-sub connectors are still made, but you probably won't like the prices for any of the ones with shorter lead time availability. Some are marked as ship from...
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    I expect it is relying on the Z80 to run the DRAM...

    I expect it is relying on the Z80 to run the DRAM refresh cycles. That is hinted at in the restriction of the longest DMA burst latency in the specifications section.
  25. Thread: Atex PDP-11/34

    by cruff
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    You need to concentrate on identifying which...

    You need to concentrate on identifying which serial port is the ODT console port that the J-11 CPU will talk to if it is configured to enter ODT at reset. This port is also commonly used by the DEC...
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