epia-m + bios savior + dip2plcc + doc (md2802-d08)

[Niki Waibel]

okay -- it seems that things are working (a little bit).

on http://www.rootshell.be/~nwaibel/docprobe.txt you can
find the output of a modified version of docprobe.

you can see the plain mem map of the md2802-d08 there.
it is different to the md2800-d08!!!

0x0000: 512byte IPL -- is someone able to rev eng this?
0x01ff

0x0200: 512byte mirror of IPL
0x03ff

0x0400: 512byte mirror of IPL
0x05ff

0x0600: 512byte mirror of IPL
0x07ff

0x0800: 512byte IPL -- this seems to be the first 512byte of page 0 of the 8mbyte flash memory
0x09ff

0x0a00: 512byte -- not sure but could be 2nd part of page 0 of the 8mbyte
0x0bff

0x0c00: 512byte failsave IPL? -- not sure but could be 3rd part of page 0 of the 8mbyte
0x0dff

0x0e00: 512byte -- not sure but could be 4th part of page 0 of the 8mbyte
0x0fff

0x1000: the doc 2000 and doc millennium (2001) control registers are here.
        but it seems that this is not true for the md2802-d08 chip!
        everything is set to 0x00 -> docprobe does *NOT* recognize this chip as
0x11ff  DoC Millennium!!!

0x1200: hmmm -- control registers? very strange. it is like IPL but (almost) all
        even bytes are set to 0x00 (not all!)
        maybe the even bytes are the control regs?
0x13ff  

0x1400: no idea -- 512 empty bytes
0x15ff

0x1600: like 0x1200, but first 3 bytes are different! control registers?
0x17ff

0x1800: expected 512byte mirror of IPL here -- but it is a mirror of 0x1200!
0x19ff

0x1a00: 512byte mirror of IPL
0x1bff

0x1c00: expected 512byte mirror of IPL here -- but it is a mirror of 0x1200!
0x1dff

0x1e00: 512byte mirror of IPL
0x1fff


any ideas or more info about this md2802-d08?

niki

BTW:  the epia-m does not boot with
epia-m + bios savior + dip2plcc + doc (md2802-d08).
even not if bios savior is switched to the normal flash containing the bios.
even not if there is only epia-m + bios savior + dip2plcc.
so i booted with epia-m + bios savior and then (when linux was running)
i placed the dip2plcc + doc (md2802-d08) into bios savior and
changed the switch.