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Messages - matthias1992
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301
« on: August 07, 2010, 10:54:56 am »
I think we want more then 96x65, personally I am in favor of QVGA which is 320x240. It isn't neccesarily more expensive and adds greatly to the overall feeling. I believe I said it somewhere else already but I think if this will run KOS it should run a upgraded version of it which takes full use of new instructions and the 4x greater speed. Sorry, I know it is quite a pain to write a OS let stand having to 're' write it, you can always you KOS Z80 as a reference and bse for KOS eZ80 though. Rogue shouldn't be too hard to port over right? I think we are aiming for something Nspirish but cooler, faster and in general just better. I am in favor of your IO headphone jack though.
302
« on: August 07, 2010, 08:56:03 am »
Good point. Remember this was just a small and quick draft not the *final* design or something, thanks for the comment though, i'll definetely make the new design thicker. But first I want some more comments on it. Maybe we could add sort of rubber 'band' that would fit into the ports to prevent them from getting dirty or blocked (the "band" being attached to the case). EditBelow is the same top_view image but with keynames attachted to them, I didn't do it very thoroughly but this is my idea about it, some keys are explained below.  "grph" is "Y=" key "gset" is "window,zoom,format and graph" combined "gcom" is "calc and trace" "mtrx' is "matrix" "setup" is "mode" "ret" is "return/delete" These are the rough equivalents of the keys, I don't know if the layout is perfect, I actually very much doubt so. I haven't add modifier keys yet (the keys accesed trough 2nd). With 38 keys(up, down, left, right, ok and ret excluded) *3 (modifier keys(2nd and alpha)) = 114 keys most of the functions of the original TI83/84+(SE) fit on this design. Edit2I just figured the empty Softkey could very well be the "clear" equivalent
303
« on: August 07, 2010, 08:22:58 am »
Ok folks I was inspired so I made a small design for the OTeZ80, I first modeled it in sketchup and colored it in photoshop. here it is! (just a mockup)  below is the back-end with a mini-usb connection and a simple IO.  below is a top view:  and last but not least a side view, one side contains a slide switch for on/off and the other side contains a slide switch for the backlight. 
304
« on: August 07, 2010, 07:04:35 am »
Count me in as a beta tester. I am familiar with z80 language but not very much skilled with it. I can ask the stupid questions that eventually lead to a significant insight in some matters  . I prefer to take a siderole in this, I am more involved in the hardware stuff.
305
« on: August 07, 2010, 06:34:57 am »
I suggest we discuss here about the best hardware for the eZ80 version. Well, the processor is already pretty much decided isn't it? - Processor: eZ80
- RAM: ?
- (Flash)ROM: ?
- LCD: ?
- LCD Driver: ?
- Keypad (view details below): ?
- Linkport (view details below): ?
(S)(D)RAM details: how much ram, how fast/slow read write cycle and which manafacturer? (Flash) ROM: how much ROM? do we want Flash ROM or just "regular" ROM? read/write cycle? manafacturer? LCD: resolution? refresh rate? manafacturer? ( I keep asking that because we don't want to cheaply made crap that breaks easily) LCD Driver: buffer size? r/w cycle? manafacturer? compatibilty with LCD ( pretty much a must)? Keypad details: specifically how many keys and seperate keys for letters? or a alpha mode switch like on the TI83/84+(SE)? Linkport details: do we want a old IO port (probaly not) or mini-usb, or even 'full' usb? and do we want a mini-jack for the sound? or something else? someone even suggested SD-card compatibilty... I probaly forgot some important stuff but this is all I can think of now.
306
« on: August 07, 2010, 06:26:55 am »
if we are going to use the eZ80 and I am pretty sure we are then I would personally prefer a "upgraded" version of KOS that makes better use of the speed and some new instructions. I know that it will be quitea job to do that, hell, sir has to finish the first KOS first...
Well we'll see, I just want to make sure we sqeeuze te processor to the max and make it as resource unintensive as possible..
307
« on: August 06, 2010, 06:33:56 pm »
specualte-if, but cool anyways
308
« on: August 06, 2010, 04:57:52 pm »
Hmm I am a little worried about the devboards, is that just for testing or is that actually going to be in the calc cause $179 is a little expensive don't you think, and that's even without the case, buttons and LCD! I don't think there is a market for $250+ calcs...
Not to offend but I am doubting if that will work...I was thinking about manually made PCB's altough it takes far more time, it is far less expensive. maybe we could clone a Begle..ehr something mX?
Edit: I think the eZ80 could handle colors but we want this to be the cheap alternative to the ARM right? so I think greyscale would be better, 16 lvl or more would be fine
309
« on: August 06, 2010, 04:06:31 pm »
Me too but once again I am not that good at z80 assembly. There is no lack of will only lack of know-how.
310
« on: August 06, 2010, 03:42:29 pm »
Me! If I wasn't already writing one for a Spartan 3e FPGA...
plus I am not a z80 hero, but if asked I'd definetely take on the challenge.
311
« on: August 06, 2010, 03:37:06 pm »
Well done, a pity all the attention is going to OT/Community brew calc.
By that ^ I mean most people were really looking forward to this and I am sure they still are but don't be surprised if you don't get much reactions anywhere soon because everyone is commenting in the OTcalc section. if that wasn't clear then I am sorry but This ^ was what I meant with it!
312
« on: August 06, 2010, 03:35:29 pm »
I'm thinking that if we're really making something radically different than TI, we could be able to write a new kernel. KnightOS is based around TI's hardware, and it might not be the best choice. I'm sure whatever we make would have a completely different memory layout, plus the added power of an eZ80 could make a better OS possible. Not to bash Sircmpwn or anything, but I think we can do much better when not limited to the TI-83+ hardware.
I couldn't agree with you more. We could however use KOS as a reference...
313
« on: August 06, 2010, 03:31:35 pm »
I definetely like the backlight idea, I am unsure about having the backlight powered by the "regular" batteries because the'll be drained quickly. i think you'd better put the switch on the side but that is a worry for later. Which brings me to a next (random) feature I'd like to see, battery status! I just glanced over the eZ80 documentation and I think it is absolutely perfect. I would personally like to pick up >20Mhz, possibly the 50mhz. Since the most expensive 50Mhz eZ80 is $18.4 and the cheapest: $8.6. The golden midway is $12.6 This is all very afforable! I think of all components the screen, case and proccesor are going to be the most expensive. I estimate/like to see the eZ80 version going for sale at about $70 or maybe less if we manafacture in china  Off course this is all just specualting. Here is the eZ80 (multiple versions):http://search.digikey.com/scripts/DkSearch/dksus.dll?Selection&c=39&f=356&ptm=6200&site=us&lang=en and documentation:http://www.zilog.com/docs/ez80/ps0066.pdf edit:Interesting idea - not sure how to implement though. Maybe a regular backlight? Or LED bars?
Some LCD's already have a backlight integrated. I'd definetely take one of these as they tend to be fast as well, and switching the backlight is quite easy (just a signal/flag).
314
« on: August 06, 2010, 01:19:01 pm »
ok ty
315
« on: August 06, 2010, 01:17:11 pm »
what does OT stand for? What did I miss?
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