Re: The problems in src/sys/dev/ic/isp.c

[Dennis Clarke <dc%genunix.com@localhost>]

On 4/27/26 11:22, Dennis Clarke wrote:
> On 4/27/26 06:52, iwama%t3.rim.or.jp@localhost wrote:
> > Hi all,
> >
> > FYI
> >
> > I have encountered a problem with several Alpha machines where the 
> > power turns on but they do not function. Three Alpha machines, DEC3000 
> > model 700, Alpha XL 266, and PC164UX, are now working after replacing 
> > their RTC chips.
>
> OKay !  Thank you. This is a glimmer of hope. I will look closely into
> the machine and find the Dallas? RTC chip. There must be a way to
> replace it and I can tell you it has been years, no decades actually,
> since I held a soldering heater pointy thing-a-ma-gig.

Sort of a self reply : I located the nasty miserable DALLAS DS1287

    https://www.genunix.com/dclarke/alpha/dallas/DALLAS_DS1287_RTC_1.png

Just a horrific design wherein pins 16 and 20 are absent.   :(


--
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken