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27 February 2008, 20:22
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#1 |
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Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
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A1200 rev.2B motherboard: resistor in ALICE pin
I noticed this this today:
 it caused some slight trouble when installing the DCE flickermagic... I have another 2B motherboard here, but it lacks this resistor... does this mean that the pictured motherboard with the resistor has the famous "timing fixes" 
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27 February 2008, 20:49
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#2 |
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Banned
Join Date: Aug 2006
Location: Argentina
Age: 51
Posts: 648
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that resistor is hack for ntsc motherboards to make boot default in pal mode instead ntsc
that hack doesn't produce timing issues |
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27 February 2008, 21:03
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#3 |
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Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
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what? really? so I have an NTSC mobo?
bah will it affect me in any way? |
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27 February 2008, 21:21
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#4 | |
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Banned
Join Date: Aug 2006
Location: Argentina
Age: 51
Posts: 648
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Quote:
anyways Im not sure about that hack is 100% bug-free it can cause some problems with scandoublers or with your particular DCE flickermagic... bye Last edited by laser; 27 February 2008 at 21:26. |
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28 February 2008, 08:45
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#5 |
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Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
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OK, did some tests...
removed the resistor and booted. Scout gave me a PAL Agnus. changed screenmode to NTSC, and again Scout gave me a PAL Agnus ... using ClassicWB ADVSP btw... so??? if it was an NTSC motherboard, removing the resistor should give me an Agnus NTSC, right? |
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28 February 2008, 09:37
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#6 | |
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Banned
Join Date: Aug 2006
Location: Argentina
Age: 51
Posts: 648
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Quote:
that hack was invented by some resellers to sell 1200' ntsc motherboards on PAL countries btw, check what kind of video you got from composite video output bye |
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28 February 2008, 09:48
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#7 |
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Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
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hmmmm
I checked the early startup menu too, PAL is pre-selected... will try the VHS out in a while... |
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28 February 2008, 10:09
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#8 |
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Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
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just checked, it displays on my tv and flickers the same as my cd32/pal ...
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28 February 2008, 11:14
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#9 | |
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Banned
Join Date: Aug 2006
Location: Argentina
Age: 51
Posts: 648
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Quote:
which problem exactly you have with that motherboard with the resistor? strong flicker? |
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28 February 2008, 13:19
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#10 |
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Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
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not really a problem, as I wrote before in caused trouble when installing the DCE flickermagic... I removed it now completelly, seems OK
will try connecting VHS to a tv-tuner and see what it gets recognised for (I have a SAA7135 based one that supports ALL formats) |
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28 February 2008, 14:12
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#11 |
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Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
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nice, I just checked with trusty FLY2000TV... 24.49 FPS VHS input...
I still wonder why the resistor was there in the first place... maybe I need to let it do intensive gfx stuff? an AGA demo perhaps? |
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06 March 2008, 00:38
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#12 |
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Registered User
Join Date: Mar 2006
Location: Birmingham/England
Age: 40
Posts: 79
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