Re: mosaic screen on c64

On 08/06/2014 07:40 PM, MikeS wrote:
> Thank you! Have been looking for this (admittedly not very hard ;-)

If anyone here has verified accounts (ideally with a photo) of what the 
7710 and everything between 7702 and 7706 are, my 'chip_numbers.txt' is 
always looking for input.

I assume the 7713 is a 74LS04, but haven't seen it anywhere, that's why 
it's not in the list yet.

  Gerrit




> ----- 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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>
>
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