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Re: Dead II+ Rev.7 motherboard
- Subject: Re: Dead II+ Rev.7 motherboard
- From: et472@FreeNet.Carleton.CA (Michael Black)
- Date: 13 Aug 2006 14:25:58 GMT
- Newsgroups: comp.sys.apple2
- Organization: The National Capital FreeNet
- References: <44df2c91$0$6992$9b4e6d93@newsspool1.arcor-online.net> <44df3073$0$20029$9b4e6d93@newsspool4.arcor-online.net>
- Reply-to: et472@FreeNet.Carleton.CA (Michael Black)
- Xref: g2news2.google.com comp.sys.apple2:11450
Linards Ticmanis (ticmanis@gmx.de) writes:
> Linards Ticmanis wrote:
>
>> Replacing the LS11 didn't help.
>
> I should add that I only had a 74HCT11 available as a replacement, which
> maybe is not close enough in timing to a real 74LS11 to accurately
> create the LD194 signal.
>
That HCT is CMOS, and the issue may be incompatibility with the lower
power schottkey devices already in the II. Before you panic too much,
get the proper 74LS11.
Michael