[Arm-netbook] RGB/TTL interface

[Louis Pearson]

The "project" I'm doing is mostly about learning some new skills, it is a
personal project that I'm doing on the side. It would be a handheld game
console, mostly for GB or NES emulation.

So I guess a Raspberry Pi would be a better target, but... well, I rather
like the idea of EOMA-68. My concept would be similar to the handheld ZEOMA
console, but more reminiscent of the GameBoy. The benefit of using the
EOMA-68 would be the ability to transfer your games between devices very
easily.

Eh, maybe it's not the greatest idea. I could just use a raspberry pi and
it would work mostly the same.

Thanks for the help anyway.

On Sun, Aug 28, 2016, 13:17 Christopher Havel <laserhawk64 at gmail.com> wrote:

> That's not RGB/TTL... that's parallel 8-bit. Different ball game. RGB/TTL
> is either 24-bit (8 bits per color) or 16 bit (6 bits red / 6 bits green /
> 4 bits blue -- blue is more intense to the human eye so it only *needs*
> four bits vs six for another color). The thing you're talking about... that
> gets talked to more like a character LCD than anything else. You know the
> display on those old HP laser printers you used in grade school? The ones
> that could *only* display text, and had a dedicated spot for each
> character...? *That's* a character LCD. *That's* the kind of interface
> you're looking at here.
>
> Dude, if all you're driving is that kinda thing... use an Arduino. If you
> absolutely need Web connectivity (or if you need a little number-crunching
> ability but not a lot), use an ESP8266. On that note -- a friend of mine
> has found a way to turn off an ESP8266's WiFi side if you don't need it. (Info
> here.
> <http://www.hackster.io/rayburne/esp8266-turn-off-wifi-reduce-current-big-time-1df8ae>)
> If you somehow need something that's more than a fractional-horsepower
> driver for it ;) like if you're building some kinda fancy pants Johnny Five
> robot... throw a RasPi at it.
>

> Here, this might provide some inspiration -->
> http://johan.kanflo.com/the-commadorable-64/
> Despite the name, it's a daughterboard for a display like yours, that
> integrates an ESP8266 and driver circuitry. You'd have to buy the parts and
> solder it together -- and it's almost all surface mount stuff, mind you,
> which is a real pain in the tail... but it's worth it from what I can see
> here.
>
> EOMA68 is *way* overpowered for any application using that kind of
> display. EOMA68 is on the level of a Dell desktop, or at least an older
> ASUS netbook.
>
> On Sun, Aug 28, 2016 at 2:01 PM, Louis Pearson <desttinghimgame at gmail.com>
> wrote:
>
>> Thanks for ask these replies! I'm pretty new to displays do this has been
>> very informative. For the project in working on, I'll be using a smaller
>> screen, maybe with a touch screen. Something like this:
>>
>>
>> http://m.ebay.com/itm/161863547262?_trkparms=aid=222007&algo=SIC.MBE&ao=1&asc=20150831081539&need=62b51881f4054df6a178d0b1ebe1038d&pid=100518&rk=4&rkt=25&sd=262136737363&_trksid=p2349624.c100518.m4111&_mwBanner=1
>>
>> According to the page it accepts an 8-bit signal. From the looks of it,
>> this would be able to directly use the RGB/TTL signal.
>>
>> Another question I have is about SPI based displays. There seems to be a
>> lot in this size range. Would those be able to display hardware accelerated
>> video? Is that even a concern with this small of a display?
>>
>> On Sun, Aug 28, 2016, 12:02 Christopher Havel <laserhawk64 at gmail.com>
>> wrote:
>>
>>> Well, then. I have been corrected.
>>>
>>> Fun fact: all you need to hook an eDP display up to any computer with a
>>> DisplayPort output -- is a cable that adapts the connectors to each other.
>>> Someone on Hackaday did that a year or two ago. I thought it was neat then
>>> and I still do... don't think I bookmarked it tho.
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>>
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