Re: a CIA riddle - please run these tests

From: silverdr_at_wfmh.org.pl Date: Fri, 19 Jun 2020 14:27:37 +0200 Message-Id: <4A780AA3-AE2E-4004-8E12-CB6A21B56FA3_at_wfmh.org.pl>

> On 2020-06-19, at 14:19, Gerrit Heitsch <gerrit_at_laosinh.s.bawue.de> wrote:
> 
>> Both CIAs are marked 1386 (I expect it to be "new")
> 
> No, datecode 1386 is still an NMOS CIA and therefore an old one. The switchover came at the end of 1986 on the 250466 boards.

OK - that explains. I thought it was a bit earlier.

>  Datecode 4x86 is likely to be new.

Roger.

-- 
SD! 