Re: VIC-II DRAM refresh

On Sat, Oct 15, 2016 at 7:31 PM, Gerrit Heitsch
<gerrit@laosinh.s.bawue.de> wrote:
> On 10/15/2016 07:09 PM, Francesco Messineo wrote:
>>
>> On Sat, Oct 15, 2016 at 6:56 PM, Gerrit Heitsch
>> as I said, at one point, they were making the 65245 (I have a few
>> inside the VIC-20CR) and that is a replacement for the 74LS245. I'm
>> not sure what process they used on these.
>
>
> The '6' should indicate 'NMOS'.
>
>
>> Why not keeping the good practice and make a 77S100 for example? 77257
>> 7706 and 77258 (just a few examples) would have been good too :)
>> I'm sure most of us have to keep a list of equivalents to avoid
>> putting the wrong replacement
>> (I do need it).
>
>
> Here's my list:
>
> 7700   (see 8700)
> 7701   (see 8701)
> 7707   7406 or 74LS06
> 7708   74LS257
> 7709   74LS258
> 7711   74LS139
> 7712   74LS08
> 7713   74LS04
> 7714   74LS02
> 7715   74LS373
> 65245  74LS245 (found in VIC-20)
> 8708   74LS257
> 8712   74LS08
> 8713   74LS04
>
> 8700   82S100-like mask programmable PLA. Revisions: (only on die: R1/R2)
> 8700-001  PLA C64
> 8700-009  PLA 8296D
> 8700-010  PLA C16/C116/+4
> 8700-011  PLA in 1551 module
> 8701   Clock Generator C64/C128  Revisions: (only on die: R2)
> 8706   Found in 364, 28pin. Revisions: R0
>

good list, I had some missing parts (I've never seen a 7715 so far) :)
I wonder what would have been the 7710 or all other missing numbers.

Thanks
Frank
>
>  Gerrit
>
>
>
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