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Old 05 September 2008, 18:38   #1
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Question Cloning the Vortex GoldenGate Monitor Master...

The Monitor Master offers automatic monitor=switching between an ISA VGA and the Amiga video signal... The device is fairly simple to clone , but I worry that the TI chip next to the yellow switch has protected content... can someone confirm this? It has the TI logo and 234 302K sn74S157N , a Quadruple 2-Line to 1-Line Selector/Multiplexer
I have no idea what it does, I just opened mine in order to actually see if it can be done... someone else will build the clones

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Old 05 September 2008, 20:28   #2
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no clue, but found a datasheet:
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Old 05 September 2008, 22:41   #3
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It's a simple TTL logic chip.
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Old 05 September 2008, 22:47   #4
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Originally Posted by papa_november View Post
It's a simple TTL logic chip.
so, we just find the same and solder it there? no programming at all?
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Old 05 September 2008, 23:10   #5
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Hello my friend, yes it is a std off the shelf TTL chip, no programming required & replacement can be dropped in

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Old 06 September 2008, 03:55   #6
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And better: lots of equivalents! the piece is a TTL 74S157, so any 74 or 54 (military grade) with the middle letters S, F or LS will work.

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Old 06 September 2008, 09:50   #7
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excellent news then!
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Old 03 July 2011, 22:21   #8
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Yes, I know this is an old thread, but has anyone tried to reproduce Monitor Master?
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Old 01 September 2017, 17:31   #9
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Very old thread, but I'm in the process of cloning the Vortex Monitor Master...
Soldering one as we speak...

Old 07 September 2017, 03:37   #10
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Is this somehow better than Ratte's Auto Switcher? It sounds very similar that the auto switching is serial activated, but I think Ratte's can also use Parallel, never used that part though.
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