WD Caviar (not ROYL) 128K ROM information (PMCBLKs and MODs)

[jcarlosmor]

Hello,

Is there a repository or some old webpages that still mantain some information about Nazyura's earlier researching about WD drives? Looking for Nazyura's workings only gives me broken web-links.

Fzabkar researching is invaluable, but focused mainly on ROYL drives. I am looking for that info but for pre-ROYL drives (mainly Caviar WD400, WD800, etc). I pretty sure might think that Nazyura's earlier workings may have plenty of info from that era.

Following Fzabkar posts I was able to write simple QuickBasic (for easy of binary file-managing) programs to inspect PMCBLKs, reconverting endian order, etc. make checksums verification, etc. All for the purpose of learning deeper about WD drives. (Thank you for that gold info Fzabkar !!! )

Now, I would like to investigate deeper on how to access to Microjog values, etc. embedded in MOD47 from ROM, etc. but almost all of the information is focused on ROYL drives.

Thank you in advance.

[fzabkar]

You can find archived copies of these pages at the Wayback Machine:

http://nazyura.hardw.net/Part02.htm
http://nazyura.hardw.net/000008.htm
http://nazyura.hardw.net/index.htm

Last edited by fzabkar on September 15th, 2020, 14:16, edited 1 time in total.

[fzabkar]

https://web.archive.org/web/20080814164540/http://nazyura.hardw.net/Part02.htm
https://web.archive.org/web/20180730150903/http://nazyura.hardw.net/000008.htm
https://web.archive.org/web/20180823174730/http://nazyura.hardw.net/index.htm

[jcarlosmor]

Thank you so much for the links !!! . The first group appear broken, but the second group (from the web.archive.org), is still alive.

Those were the pages that I was looking for long time. I remember the classic old-styled web page design and the ASM listings.

Thank you again.