Is there somewhere a description of how the DVI interface works, and what
signals (type & speed) come out (and where) of the Model T ?
Did you need to load any software on the T to make it work, or was a simple
screen 1,0 enough ?
Is there a general description of the workings of a DVI, somewhere ?
Greetings from the TyRannoSaurus
Jan-80
From: Mike Stein <mhs.st...@gmail.com>
To: m...@bitchin100.com
Sent: Wednesday, 2 August 2017, 19:44
Subject: Re: [M100] Model 100 serial port
Correct; the HC is definitely a better replacement for the 40H, but I'm pretty
sure that in a pinch the HCT would also work.
m
----- Original Message -----
From: "Francesco Messineo" <francesco.messi...@gmail.com>
To: <m...@bitchin100.com>
Sent: Wednesday, August 02, 2017 1:05 PM
Subject: Re: [M100] Model 100 serial port
> On Wed, Aug 2, 2017 at 6:47 PM, Mike Stein <mhs.st...@gmail.com> wrote:
>> Good advice; the most likely culprit (because it's indirectly connected to
>> the outside world with its static, lightning, ground loops etc.) is M35, a
>> (1)4584.
>>
>> The only other IC would be M24, a 40H032 (which could probably be replaced
>> with a 74HC(T)32).
>
>
> 40H family is directly replaceable with 74HC family. I wouldn't use
> 74HCT chips in this circuits, the TTL voltage input compatibility
> isn't needed (and it doesn't do harm anyway) but switching times and
> power consumption of the HCT family are slightly different from the
> original 40H and the almost-identical 74HC.
>
> By the way, the UART chip could be the culprit too, just trace the
> signal back from the DB25 until it disappears. (Or start from the UART
> pin forward to the external world).
> HTH
>
> Frank
