Re: mosaic screen on c64

Thank you! Have been looking for this (admittedly not very hard ;-)

m

----- Original Message ----- 
From: "Gerrit Heitsch" <gerrit@laosinh.s.bawue.de>
To: <cbm-hackers@musoftware.de>
Sent: Wednesday, August 06, 2014 12:32 PM
Subject: Re: mosaic screen on c64


> On 08/05/2014 10:48 PM, didier derny wrote:
>> No 7708
>>
>> But 7712 et 7709
>
> Could be either of them... If you have the parts, replace them and see if 
> that changes anything. If not, you wasted about 2 Euros (incl. sockets). 
> If that doesn't change anything, try replacing the PLA on U17 (906114-01, 
> 251064-01, 82S100 or 93459, the latter 2 usually labeled 'C64A')
>
> Here's the replacement matrix for the MOS 77xx and 87xx:
>
> 7707   7406
> 7708   74LS257
> 7709   74LS258
> 7711   74LS139
> 7712   74LS08
> 7714   74LS02
> 8708   74LS257
> 8712   74LS08
> 8713   74LS04
>
>  Gerrit
>
>
>
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