Re: VIC-II DRAM refresh

From: Gerrit Heitsch <gerrit_at_laosinh.s.bawue.de>
Date: Sat, 15 Oct 2016 19:31:44 +0200
Message-ID: <fb653f58-653a-1a96-f633-a53208208098@laosinh.s.bawue.de>
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


  Gerrit



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Received on 2016-10-15 18:01:08

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