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Re: [N8VEM-S100:5375] Z80 CPU board - D2/D3 port timing problem

To: n8vem-s100@googlegroups.com
Subject: Re: [N8VEM-S100:5375] Z80 CPU board - D2/D3 port timing problem
From: Philippe Elie <philip...@gmail.com>
Date: Sun, 12 Oct 2014 12:07:13 -0700 (PDT)
Cc: mon...@vitasoft.org
In-reply-to: <CAHC-VtjFs--WsOC8REJ4stnnVovrAjS26wza78a0RprNzZu-Mg@mail.gmail.com>
References: <3ba55519-d72c-41ef-827b-80a9fdff587e@googlegroups.com> <CAHC-VtjFs--WsOC8REJ4stnnVovrAjS26wza78a0RprNzZu-Mg@mail.gmail.com>

thanks John. Actually, it narrowed down the problem to the latch mode, when U22-11 is pulled up (ie no jumper on P37) things are fine. Guess something's wrong in the latch circuitry, wil investigate and keep the group posted incase this can help someone

Philippe

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- Re: [N8VEM-S100:5375] Z80 CPU board - D2/D3 port timing problem
  - From: nbreeden <nbre...@me.com>

References:
- Z80 CPU board - D2/D3 port timing problem
  - From: Philippe Elie <philip...@gmail.com>
- Re: [N8VEM-S100:5375] Z80 CPU board - D2/D3 port timing problem
  - From: John Monahan <monah...@gmail.com>

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