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Author Topic: Dick Tracy (Cart) LCD Weirdness  (Read 527 times)

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Offline tjohnson

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Dick Tracy (Cart) LCD Weirdness
« on: 21:48, 23 February 19 »
So I just got an LCD TV to try and reduce the number of monitors I have, I noticed that when using the LCD with Dick Tracy on cartirdge many of the sprites end up with bits missing, this doesn't happen on a CM14 monitor, anyone know why this would happen?

Offline dthrone

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Re: Dick Tracy (Cart) LCD Weirdness
« Reply #1 on: 01:55, 24 February 19 »
I've got this problem with certain cart files, some sprite corruption on (big) LCD TV but ok on CM14.  I'm connected via scart from the GX4000.  I've not experimented with RF or different screen types / sizes etc.  Advice to the cause would be great!

Offline gerald

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Re: Dick Tracy (Cart) LCD Weirdness
« Reply #2 on: 11:02, 24 February 19 »
So I just got an LCD TV to try and reduce the number of monitors I have, I noticed that when using the LCD with Dick Tracy on cartirdge many of the sprites end up with bits missing, this doesn't happen on a CM14 monitor, anyone know why this would happen?
That's a dick tracy original cartridge issue.
http://www.cpcwiki.eu/forum/games/dick-tracy-(gx4000)/
I've fixed the one distributed with the C4CPC

Offline tjohnson

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Re: Dick Tracy (Cart) LCD Weirdness
« Reply #3 on: 11:26, 24 February 19 »
That's a dick tracy original cartridge issue.
http://www.cpcwiki.eu/forum/games/dick-tracy-(gx4000)/
I've fixed the one distributed with the C4CPC


Cool that is super gerald what was the issue and what causes it on an lcd but not on an original monitor? Is the fixed file available to download? Are any of the other cart games like this that you are aware of 

Offline dthrone

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Re: Dick Tracy (Cart) LCD Weirdness
« Reply #4 on: 12:10, 24 February 19 »
Yes, knowledge of the fix please  :D


Note, specifically how does the LCD TV factor in?  Is the fix just making sure the ASIC variables are set to zero on initialisation?
« Last Edit: 12:21, 24 February 19 by dthrone »

Offline gerald

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Re: Dick Tracy (Cart) LCD Weirdness
« Reply #5 on: 13:53, 24 February 19 »
I've been digging a bit and it looks like I did not fix Dick Tracy (or lost it :picard: )
However I've fixed
- No Exit (http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/cpc-plus-cartridge-replacement-one-more/msg96343/#msg96343)
- Pro tennis court ( http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/cpc-plus-cartridge-replacement-one-more/msg96357/#msg96357)
For Dick tracy, the fix would be to initialise the asic coordinates.

Now why its working on the CM14 and not on the LCD.
 My guess is that you use the CM14 supply with the CM14 and an external supply wit hthe LCD.  That can make a difference for initialised HW.

Offline gerald

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Re: Dick Tracy (Cart) LCD Weirdness
« Reply #6 on: 14:37, 24 February 19 »
Can anyone have the problem test this one ?

Offline tjohnson

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Re: Dick Tracy (Cart) LCD Weirdness
« Reply #7 on: 16:33, 24 February 19 »
Thanks gerald I'll burn a rom and try it, are your able to share the other ones you fixed  my copy of no exit often doesn't start.

Offline gerald

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Re: Dick Tracy (Cart) LCD Weirdness
« Reply #8 on: 16:47, 24 February 19 »
No exit fixed version is attached to this thread :

http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/cpc-plus-cartridge-replacement-one-more/msg96343/#msg96343
I do not think I've posted the Pro tennis court fixed one, so here it is.

Offline dthrone

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Re: Dick Tracy (Cart) LCD Weirdness
« Reply #9 on: 18:45, 24 February 19 »


Now why its working on the CM14 and not on the LCD.
 My guess is that you use the CM14 supply with the CM14 and an external supply wit hthe LCD.  That can make a difference for initialised HW.


A software method for identifying the power supply?  :laugh:

Offline tjohnson

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Re: Dick Tracy (Cart) LCD Weirdness
« Reply #10 on: 22:45, 01 March 19 »
No exit fixed version is attached to this thread :

http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/cpc-plus-cartridge-replacement-one-more/msg96343/#msg96343
I do not think I've posted the Pro tennis court fixed one, so here it is.
Your no exit fix works great, my genuine cart has an issue starting, I've attached the file, it seems very slightly different from another version I downloaded, a couple of minor changes, no idea why.I haven't had a chance to try dick tracy but hope to soon.