[Coco] hardware

[mike delyea]

Why is that a good idea?  My circuit still works despite my lack of
knowledge. Is this a "best practice" type of thing or a "look out, its
going to blow" type of thing?  Should I be worried?  I know nothing
about electronics, never took it in school and I don't know any
theory.  Whatever - I - who knows nothing - was still able to build a
simple circuit.  And basically, I enjoyed myself putting it together.
I'd like more of those simple projects.  If anybody is interested I
could post pics on my web site.

On Sat, Jan 3, 2009 at 10:37 PM, John Eric <jet.pack at ymail.com> wrote:
> it's also a good idea to disable the unused gates in the 74ls02 by connecting the unused inputs (not the outputs) to either vcc or gnd. with a 74ls02, i use vcc.
>
>
>
>
> ________________________________
> From: mike delyea <mdelyea at gmail.com>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Saturday, January 3, 2009 9:08:28 PM
> Subject: Re: [Coco] hardware
>
> The particular Atari monitor I was using was a 1080.  There is no
> specific info on the internet for the 1080.  All references I found
> were for the 1084, which is supposed to be the same as the 1080,
> unless you got the other model with the 26 pin connector.  My travails
> trying to get that monitor working, and my ultimate success can be
> found here.
>
> http://www.coco3.com/modules.php?name=Forums&file=viewtopic&p=1718&highlight=#1718
>
> On Sat, Jan 3, 2009 at 9:54 PM, John Eric <jet.pack at ymail.com> wrote:
>> His atari model may have needed differing sync levels? or composite sync? or something? Jeric
>>
>>
>>
>>
>> ________________________________
>> From: BookWorm <bookworm at cavenet.com>
>> To: coco at maltedmedia.com
>> Sent: Saturday, January 3, 2009 8:37:48 PM
>> Subject: Re: [Coco] hardware
>>
>>> I have pretty minimal hardware skills,
>>
>> You should see mine...
>>
>>> but I did manage to piece
>>> together a circuit to invert the coco video signal so I could drive an
>>> Atari monitor
>>
>> Are you refering to an EGA monitor?
>>
>>>(surprisingly no one else on the list could help me - so
>>> I ended up doing it all myself- figuring out the correct chip and
>>> designing the circuit).
>>
>> That's because Atari monitors are already compatible with the CoCo 3. They
>> don't require converting.
>>
>>> soldering (heh, i almost wrote slobbering)
>>
>> That's what I do with a slodering iron too.
>>
>>> Forget about the coco4
>>
>> I'm trying.
>>
>>> and FPGA
>>
>> Actualy, I like James's FPGA GIME upgrade. I hope I can order one soon.
>>
>>>and hard drives
>>
>> You don't have a hard drive? Cloud 9 sells SCSI and IDE controllers.
>>
>>
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>>
>>
>>
>>
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