68HC11, DRAM, SPI, X25020

everyone,
i have 2 questions that i'm currently investigating.

1:
i'm trying to investigate how to use a DP8428 DRAM with a 128k x 8 DRAM chips.
i also want to know how much overhead is is lost due to necessary refreshing
http://eshop.engineering.uiowa.edu/NI/pdfs/00/86/DS008649.pdf
http://www.datasheetcatalog.com/datasheets_pdf/D/P/8/4/DP8428.shtml

2:
how do i interface X25020 to the 68HC11 SPI embedded function. i also need to write a device driver in C that provides a way to read any particular addressed byte. that is, calling the device driver w/ an argument address will retrun the char stored at that address in the X25020.
 http://www.alldatasheet.co.kr/datasheet-pdf/view/XICOR/X25020.html
http://www.alldatasheet.co.kr/view.jsp

i know a little bit of C but haven't programmed in a while so any input, advice, direction, sample etc will be greatly appreciated.

thx
-r
ransulaAsked:
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mokuleCommented:
1.
Why not using static rams? Back to ancient history?
2.
I know it is not exactly what are You looking for, but You've got schematics and source code for interfacing serial spi eeproms to 68hc11
http://ww1.microchip.com/downloads/en/AppNotes/00646c.pdf
http://www.eetasia.com/ARTICLES/2001JUN/2001JUN11_MEM_MPR_AN1.PDF
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ransulaAuthor Commented:
mokule,
it's a problem that i've been given.
i wouldn't torture myself that way if i had the choice :)

-r
0
ransulaAuthor Commented:
mokule,
u wouldn't know of any program that will convert a .asm prog to .c
do u?

i know the reverse is possible ...
-r
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mokuleCommented:
Unforyunately I don't know of such a program.
Moreover I can't see any sense in it, unless You have been given such task :)
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ransulaAuthor Commented:
no, i know of the reverse ... so i thought i ask
-r
0
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