ZX Ferrum #02 26 апреля 2004

Концепции

Iron - Spectrum handheld: ZX-Pad - opinion.

                        ZX-Pad - opinion.
(C) Filio


  Read here recently ZXFerrum # 01 on the draft ZX PAD, then 
visited the site ... Liked the idea, but a little abused, as 
they say, the idea "in itself", there was one question: how is 
would be economically justified? 

  The fact that I at one time he was engaged in similar 
projects, even been divorced almost a debug version of the card 
... 

  But! After careful calculation of all components and costs
the project was closed just because of the cost. Even if
count only the already selected components, we get:


(Figures are approximate)

Processor Zilog Z8L180 - I think approximately $ 10

Chip-set Altera EP1K30 - $ 15

System Memory AM29LV0x0 (55ns) - 040 - $ 5

Memory SRAM (55ns) - we assume that pulled her
from the old "Four ... though ... planar response there yet
infrequently encountered, but ...

Video memory SRAM (10-12ns) - the same ...

NAND Flash K9Fxxx (Samsung) or TC58xxx (Toshiba) - $ 20, I think
at least for the 8-megabyte disk ...

Expansion connector on the standard SmartMedia Card for flash 
cards. - about $ 3-4, and even more ...


Interface device (combined UART Driver) MAX3130 -
$ 3

Irda - a separate conversation, since most likely to put 
something household with extremely limited with increasing does 
not make sense, but Even with the restriction to 115 kbit / s - 
$ 5 

Audio controller (stereo DAC c support for MP3) VS1001 - $ 14

System clock / alarm clock PCF8593 (Philips) or similar - $ 3

Display device, a passive matrix LCD display 320x240 - complex
position, especially if you just take on the color ... He does 
not less than $ 70. We have such a monochrome 128x128 worth $ 
20. 

Input Device - eight buttons on everything about everything add 
$ 2. 

Controller discharge / charge the batteries ($ 4), anti-core
voltage and voltage for LCD ($ 5) ... And the batteries 
themselves (Only Li-Ion - around $ 20), which should be enough

succinct, as Altera and color screen will consume enough
a lot ...


  Total we have about $ 170 ...

  And boards, chassis, and so much more left out ...



  Here's an example, prices of some models are already available
PDA (13.04.2004):

ASUS A600 400MHz, 32M +64 M, SD / MMC Slot, MS PocketPC 2002 $ 
330 <240 * 320 @ 64K Colors, Intel PXA250, IrDA, Stereo jack,

Mic., 75 * 125 * 1912, 8mm, 138g, ~ 15 hours Li-Ion>

Pocket PC hp iPAQ H1915 USB + Rus Soft $ 217



SONY Clie PEG-TJ25 + Rus Soft $ 227
<200MHz, 16Mb, 320x320 @ 64k, MS / MSPro, Li-Poly>

PALM TUNGSTEN E + Rus Soft $ 215
<126MHz, 32Mb, LCD 320x320 @ 64k, SD / SDIO / MMC, Li-Ion>

This is all new.



  And I have here already a couple of months living SONY CLIE 
PEG-SL10 / U. .. It's almost a classic PALM, but given the fact 
that this Sony. That she can: Motorola DragonBall 16MHz, 8MB 
memory slot MemoryStick, IRda, USB, touch-sensitive screen 
320x320 with 16 shades of gray and illuminated area Graffiti, 
JogDial. PalmOS 4. 1 with all the consequences of a huge

number of software of all kinds ...

  On the possibility of independent development of 
applications, I even do not mention.


  Yes, it does not have MP3-player, but nothing prevents him to 
hang on expansion slot, or MS-slot ... A USB cable allows you 
to use it as a banal memory stick, and any size ... Powered by 
two AAA batteries that virtually eliminates the problem of 
supply if suddenly forgot to charge the batteries. A pair of 
800 milliamperchasov missing almost all day reading books and 
all this in dimensions 2,5 "HDD ...



  Not would be desirable to my letter was taken as a 
non-constructive criticism, but that's my opinion ... If I 
suddenly something misunderstood, I will be happy to explain. 


  But the project ZX-VGA converter, fully supported, as
 only because of this I went with a real cake for emulators and
Other perversions ...;-) 50Hz eye still pretty bad ... The only 
thing that I wanted to add: refresh rate probably better to 
install a 100 Hz, and agreeable, and the beats will not be as 
noticeable. I propose to consider the option of dual-port SDRAM 
/ SGRAM memory anyway because we put the PLD, so back 
controller and stuff ... 


  That's all I wanted to say. I will be glad to further 
communication on  about the iron for the cake and not only ... 
;-) 

[I hope that the newspaper will survive on the _2 ootlichie
ZXHard ...
and become a magazine ...]

Good luck in your creative and personal affairs and aspirations!

Sincerely, Valerie.



                       Opinion Editor:


  Constructive criticism, as always, always (I apologize in 
advance) all depends on the monetary and sex: you're in a purse 
for money, but there # uy. That's ... 

  At the expense of communication and cooperation, I remind 
everyone, is required it needed to pull everything else soon 
will all be sitting on emulators. And if all harderschiki and 
not only will share experiences, schemes and so on and so forth 
with the newspaper, the newspaper will live!