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#1 |
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Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
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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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#2 |
Registered User
Join Date: Jun 2008
Location: planet earth
Posts: 1,115
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no clue, but found a datasheet:
http://www.datasheetcatalog.net/de/d...N74S157N.shtml |
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#3 |
Registered User
Join Date: Jul 2008
Location: California
Posts: 184
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It's a simple TTL logic chip.
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#4 |
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Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
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#5 |
Amibay Senior Staff
Join Date: Feb 2008
Location: Cardiff / Wales
Posts: 1,302
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@keraopi
Hello my friend, yes it is a std off the shelf TTL chip, no programming required & replacement can be dropped in TC ![]() |
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#6 |
I hate potatos and shirts
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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.
Examples: 74LS157 54S157 54F157... |
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#7 |
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Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
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excellent news then!
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#8 |
Registered User
Join Date: Aug 2006
Location: Finland
Posts: 62
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Yes, I know this is an old thread, but has anyone tried to reproduce Monitor Master?
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#9 |
Posts: n/a
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Very old thread, but I'm in the process of cloning the Vortex Monitor Master...
Soldering one as we speak... :-) |
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#10 |
Registered User
Join Date: Dec 2015
Location: USA
Posts: 3,010
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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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#11 |
Registered User
Join Date: Jan 2020
Location: Bentonville, AR USA
Posts: 78
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How does someone get their hands on one of these clones?
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#12 |
Guru Meditating
Join Date: Jun 2014
Location: England
Posts: 2,367
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Cameraman, on amibay
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#13 |
Registered User
Join Date: Jan 2020
Location: Bentonville, AR USA
Posts: 78
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