This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.
Messages - fb39ca4
Pages: 1 ... 114 115 [116] 117 118 ... 126
1726
« on: August 07, 2010, 02:33:30 pm »
lol! Hopefully it wont happedn with tiDE
1727
« on: August 07, 2010, 02:29:12 pm »
That looks interesting, [propeller chip] but it is a competely different architecture, that almost essentially no one here is familiar with. We could have multiple low-performance chips, but it may get complicated. As for the gpu, I was thinking of something very basic, with the capabilities of say, the Super FX chip used in SNES games. It would be used for some sort of 3D-geometry program.
1728
« on: August 07, 2010, 01:53:32 pm »
I think specs like this is overkill. Also, battery drain is an issue. The non xm beagleboard uses 350ma @ 4.8v, so we would need some large batteries to keep it going for a while. I would aim for >20 hrs of battery life on 4 AA alkaline batteries. As for the processor, I would say 200mhz at most, and a low power consumption one too. Feature-wise, we should definitely have a micro-usb port. Also, a 3.5 mm port for connecting to TI calcs and headphones. I'm a little iffy on a SD card slot. It seems a bit too much for a calculator. We might want a second gpu chip, that can do image scaling and rotating, and filling polygons. (For the 3d geometry, we'll say  ) The screen should be 320x240, similar to the Nspire's, but have color. I think 4-bit rgb will be enough. (light and dark RGBCMY, black, white, and two shades of gray)
1729
« on: August 07, 2010, 01:10:58 pm »
It needn't be too high, because apparently an eZ80 is four times as efficient as a Z80 at the same clock speed. 20mhz should be sufficient. Here's the user manual I got that from.
1730
« on: August 07, 2010, 12:57:56 pm »
We can have a 192x128 screen, so it scales perfectly.
1731
« on: August 07, 2010, 12:56:00 pm »
I understand that, but if you read the first post, you'll see that development is done on TI calcs until there is a prototype.
1732
« on: August 07, 2010, 12:45:45 pm »
If you want to help, you can also use an emulator to test, thus preventing srewing up your calc.
1733
« on: August 07, 2010, 12:28:55 pm »
I don't know that much about z80 asm, but I would gladly test the software.
1734
« on: August 07, 2010, 11:27:42 am »
I think a qvga screen would be fine. The nspire has that resolution. However, if it makes the physical dimensions too big, we could go a smaller, maybe 192x128 or 240*160. With any screen, native graysacle is a must.
1735
« on: August 07, 2010, 11:11:19 am »
@apcalc: for walking, you can use smooth scrolling and a 2 or 4 frame walking animation drawn in the same place on the screen.
1736
« on: August 07, 2010, 11:08:50 am »
The newer HP-50gs have sd card slots, so even though this is a calc, we shouldn't rule it out.
Also, what will the form factor be? 84 sized or Voyage 200? If it ends up being v200 sized we can always put a "DVORAK" keyboard, and still have it allowed on tests.
1737
« on: August 06, 2010, 06:39:46 pm »
We could do it like the nspire: AA batteries and an optional rechargeable. There should also be an option to recharge AAs by plugging the thing in to a usb port.
1738
« on: August 06, 2010, 05:18:20 pm »
I think we'll want something with lower specs than the beagleboard-I just took a look at the specs. Keep in mind this is a calculator.
1739
« on: August 06, 2010, 04:59:17 pm »
This looks like a great project. I can't wait to see the results.
This topic has really exploded-158 posts in less than 24 hours.
1740
« on: August 06, 2010, 11:08:08 am »
Keep in mind that Linux is programmed in C, so z80 isn't the best option. (compilers are not very good for z80)
Pages: 1 ... 114 115 [116] 117 118 ... 126
|
Show Posts
