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Thread: "Amiga 600 Tower Mk.II" aka "Sabrina 600"

  1. #41
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    1N4148 is a signal/rectifier diode, not a zener.

    Zeners are intended as voltage regulators and/or over-voltage protection.
    David Bradley made Ctrl+Alt+Del, Gates turn it mandatory
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    Ok. Thanks. I've changed that in schematic on my computer.
    But the main problem is those buffers will work?

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    The octal transceivers you are using are perfect for the task, so I can't see anything wrong with it.

    Just you might get an irritating task in getting your hands in the F series as they are a bit hard to find nowadays.
    Last edited by rkauer; 19th May 2014 at 20:00.
    David Bradley made Ctrl+Alt+Del, Gates turn it mandatory
    16 Amigas at home :D
    3x C= 64 :smile:
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    8 PC (argh) :thumbsdown: at least one is an AROS/Amithlon unit

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    I think about HCT series. Are they faster than F ones?
    F was changed from LS when I've made this schematic. It isn't set yet.

  5. #45
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    HC/HCT are slow as pushing a block of cement over tarmac covered by cold molasses compared to S/F TTL series.

    Your only logical choice is replacing S/F series by AC/ACT CMOS chips.

    Table of comparison:
    http://en.wikipedia.org/wiki/Logic_f...ilies_compared
    http://www.fairchildsemi.com/an/AN/AN-319.pdf

    Notice that the AC/ACT families are not cheap yet.
    David Bradley made Ctrl+Alt+Del, Gates turn it mandatory
    16 Amigas at home :D
    3x C= 64 :smile:
    1 VIC-20 :smile:
    8 PC (argh) :thumbsdown: at least one is an AROS/Amithlon unit

  6. #46
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    So as for me logical choice is ACT series. Even they aren't so cheap

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    After some vacation from this project I can start it again
    I was thinking all the time about boards which must be here. Also I found some errors in my design of Zorro slots. Unfortunately I can't easily use Buster chip from A2000 because of couple missing signals. So I'm designing a simple board with max 3x Zorro slots. Probably there will be only 2x slots. Well exactly 1.5x slots One for Picasso card and another for other card which won't use couple of missing signals.
    Unfortunately during moving to another house I've lost a tower case, so I'll be looking a new case for my A600...
    Today again I've checked possibility of powering Amy without original Amiga PSU Cable and I've made a prototype of A2000 keyboard interface. Below I'm posting 3 photos. Enjoy this pron

    Click image for larger version. 

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    Last edited by Atreus; 7th September 2015 at 18:59.

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    Nice to see it alive..!


    Sent from my iPad using Tapatalk
    A600HD, A1200 in "home made" tower, A4000T in progress...

  9. #49
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    Today I've checked everything if I can install it without any problems in PC Tower.
    It looks like I can & it's an almost perfect sandwich

    Click image for larger version. 

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    Now I must redesign schematic & PCB board and order it... I wonder how much I'll spend money on those PCB...
    Last edited by Atreus; 7th September 2015 at 19:22. Reason: Changed photos...

  10. #50
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    Why can't I see these pictures....
    A600HD, A1200 in "home made" tower, A4000T in progress...

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