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A Latvian and english Linux tiny operating system. used by golf & dvd lovers

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#1 2011-05-14 11:18:33

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

W95 and easy way to use ramdisk ? 2 gB of flash card in pcmcia ?

The cost of memory is always higher than we can afford or its bottomed out in hardware limitation.

So, many years ago, people used virtual memory to keep the cost of drams down but sacrifice performance with hard disk virtual memory speed.

Today, the speed of flash cards are improving. And old hdd are only 33 mbps.

As flash cards become cheaper because nor cards are smaller capacity than nand cards. We see an opportunity to speed up older laptops with pcmcia card reader and cf cards of 2 gB to be virtual memory only for W95. Nor cards of 133x write speed has 400x read speed, but limited by pci bus speed of 33 mhz. and small linewidth of flash transistors give them 100,000 cycles of write cycles,  mtbf.

So, how easy it is to change ramdisk in W95?

Goto chontrol panel, click on system, goto performance rather than the usual device manager. Select manage virtual memory yourself rather than Microsoft. Change to D: for pcmcia nor card of 2 gB. Set the minimum to 3x your dram size. Maximum is the whole 2 gB.

Reboot to see if your nor card is busy doing the job of being virtual memory to support many internet data transfer?

The reason to use cf cards for pcmcia is that many older laptops did not have USB 2.0 connectors(USB ramdisk may be faster). and older laptops may have less than 3 gB hdd. Using pcmcia virtual memory will allow you to download(free download manager and WiFi/b) and use more apps(W95 games) in your hdd.

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2011-05-14 11:18:33

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#2 2011-05-14 20:41:22

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

Re: W95 and easy way to use ramdisk ? 2 gB of flash card in pcmcia ?

Why W95 gui can use only 8 mB of drams in execution area to run laptops? W98se needs 24 mB and WME runs with at least 32 mB of drams. This includes running iE5.5, IE6 and the like of browsers. It was resolution of 800x600 and 16 bit color. Today with WME IE6 and 32 bit color 800x600 resolution needs 256 mB of drams for WME to have webpage history.

The fact is that W95 can run as low as 8 mB drams. Most laptops with 96 mB maximum capacity will be ample of drams and virtual memory of 2 gB will be plenty. Tyically, virtual memory will use 450 mB storage maximum for webpage history.

The type of gui(foobat) determines the dram size, originally to be 8 mB. With the latest bloated webpage(html4, worse html5) memory size; W95 will need 32 mB, W98se will need 72 mB, WME will need 96 mB and XP will need386 mB minimum. Then you need free space between historic files, which is 25% more memory size.. If cf-25 laptop has 96 mB of EDO drams, it can only run W98se at best on IE5.5.


So, how to redesign the dram architecture is to steal the concept on squashfs and still use virtual memory to use WinXP. If you have 96 mB of drams, 24 mB is used for execution of instructions and data processing. Operational codes are stored in hdd to be ready as cache in virtual memory(64 mB of drams) for L2 cache for cpu to process. You need data compression of squashfs in virtual memory to encode and decode.

This kind of planning, is now used by Asus EEEPC. Where WinXP is shrunk to 1 gB to be installed on a 2gB SLC  133x flash card. Then another flash card is used as D: to copy over C: data. where D: holds the WinXP codes and apps and databases. C: is for execution of data and virtual memory to cache to send to L2 cache as needed.

Asus beyond cpu frequency stepping, is now the pioneer of data compressed flash card replacement of hdd.

Footnote:
Squashfs used in Linux distros of tiny Linux operating system typically enjoy data compression between 3.5-4.5x ratio of compression(GNU). SliTaz once expanded requires 512 mB of drams(includes browser html) to run 30+ mB of compressed codes.

The question is now; is it worth while to upgrade W95 to mpeg4/h.264 and zoomed data compression of reduced pixels. Or compress WinXP to be used with squashfs and html5? Or no html5 but all mjpeg reduced pixel data processing?

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