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Type: Posts; User: jdreesen

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  1. Replies
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    PAL's can also be read out....It is even possible...

    PAL's can also be read out....It is even possible to reconstruct the equations from that readout !
    It looks like a standard RS2323 implementation to me.
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    Very very nice example ! They go for 1000's in...

    Very very nice example ! They go for 1000's in working condition in Ebay.
    Basically this thing is a "professional home computer" : build-in BASIC, built-in tape drive, GPIB expansion options, but,...
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    Roland, Nice find ! on...

    Roland,

    Nice find !

    on ftp://ftp.dreesen.ch/TEk4014 you wil find plt.tar, which contains a lot of graphic demos for the 4014. Just send them down the serial port .
    I believe they would also...
  4. Errr..it is standard, it is just that the 4 slot...

    Errr..it is standard, it is just that the 4 slot unit is rarer than the 2 slot & RS232 unit. They are exchangeable.
  5. Looks like you will have to wait some more..... ...

    Looks like you will have to wait some more.....

    The DS12885's I received after 5 weeks wait were fake ( some odd memory chip inside...)
    The other Chinese outfit send me 74ls90 instead of...
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    The ETH Ceres workstations were based on this...

    The ETH Ceres workstations were based on this chip : Ceres 1 uses the NS32032, Ceres 2 the NS32532 and the Ceres 3 uses the NS32GX32.
    All these are Oberon workstations. Detailed design reports are...
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    Roland and others, do download and install my...

    Roland and others,

    do download and install my i8008 system emulator : ( Windows program, but does run under Wine)

    ftp://ftp.dreesen.ch/Scelbal/I8008.zip

    Once installed you will be able to...
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    When was that ? I would have bought ! And I know...

    When was that ? I would have bought ! And I know of at least one other Cromemco enthousiast here in CH.

    But yes, I do mainly look into Ricardo, only recently started looking into anibis. Ebay.ch...
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    Wrong continent..... Also a nice DCC D112...

    Wrong continent.....

    Also a nice DCC D112 manual. PDP8 compatible I believe...Wonder if he still has that.

    Need to get my cromemco's running, but the pile-to-be-repaired is so high..
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    Not implemented at all : these systems were ...

    Not implemented at all : these systems were intended to be used with (multiple !) ASCII terminals. And you will be rewriting a lot of stuff if you have different implementation for the serial...
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    a upd765 based floppy interface and 2 intel 8253...

    a upd765 based floppy interface and 2 intel 8253 times would be a minimum. Schematics for the Sage II / IV machines are available.
    Sage IV has an in-house developed MFM-harddisk interface.
  12. Here they are... 60931 ..and another pic...

    Here they are...

    60931

    ..and another pic with empty PCB and 3D printed casing...

    60932

    They are functional, for the RTC part and at least the first 4 ROM images. My eprommer doesn't want...
  13. Thanks Monty ! PCB's are due in soon ...

    Thanks Monty ! PCB's are due in soon ...
  14. Replies
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    Damn, will have to find another victim to buy my...

    Damn, will have to find another victim to buy my 2nd 4052....

    PM send...
  15. That's 9 roms... which one will you leave out ?

    That's 9 roms... which one will you leave out ?
  16. Tektronix 4052/4054 Multifunction modules available.

    So I created a mutifunction module / ROMPack for the Tektronix 4052/4054

    - This covers the ROM-expander (Tektronix 4050E01) functionality in that it allows the equivalent of up to 8 ROMpacks ...
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    And some more progress : full pass on theTransera...

    And some more progress : full pass on theTransera RTC test program !
    PCB's are ordered, I'll open a new thread to check for interest.
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    Yes, the weekday calculation is correct for 19xx,...

    Yes, the weekday calculation is correct for 19xx, not 20xx. I guess that it it will not be worthwhile to adapt the code, not enough people left that do anything with a 405x.
    Like the HD146818, the...
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    Progress ! So my prototype can indeed access...

    Progress !

    So my prototype can indeed access the RTC chip, also bankswitching the ROM's seems to work. Here a trial run of my prototype, build upon a badly misused, leftover, diagnostic pack PCB...
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    If you buy it I can help out with key caps and...

    If you buy it I can help out with key caps and digital electronics, have some spare CPU / MAS boards.
    No cover plate I am afraid....

    Jos
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    Thanks for the links, Monty, I should be OK with...

    Thanks for the links, Monty, I should be OK with that. Will probably not need a full decoding of that PLA after all.
    Looks like Transera stuck to 6800 instructions only.

    Jos
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    Diassembly of the RTC code was easy with f9dasm,...

    Diassembly of the RTC code was easy with f9dasm, access to the RTC chip is easily recognized. Is there a list with known entry points in the 4052 code ?

    Dave, my wife tries to persuade me to get...
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    I only have one design a.t.m. : the...

    I only have one design a.t.m. : the Multifunktionmodule with the big eprom and RTC/serial. The simple general purpose board with be a simple modifikation of that, submitting the serial and RTC with...
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    Tek4052/4 generic ROM PCB's

    Any interest in a generic ROM board for the Tek405x machines ?
    If so, would you like it with or without a 0.1" holes "playfield" ?
    Or would you prefer a bare experimental board that fits the...
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    Only kidding Monty ! As you rightly say shipping...

    Only kidding Monty ! As you rightly say shipping these things across the pond is not fun or cost-effective.

    w.r.t. ROM imaging : donīt know how easy it is to read the Patch FPLA : if easy than...
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