Data extraction froma Wang 2200 emu file - pointers/help

[Alexey Pavlenko]

Hi all,

I've got a working emu image from a disk from a Wang2200 system - this seems to work well on a real system with no problems.

(for context I Posted about this system a little while ago " Maxtor XT 2190 - From a Wang DS (Data Storage Cabinet)")

I'm now trying to get the data from it to use with a wangemu - a Wang2200 emulator

The extracted data is there but I it does seem to be interleaved, the data is (from my limited knowledge and poking around) in 16k parts, with data continuing after 3 sections, although some parts seem to have larger/smaller gaps, so I'm not quite sure what's going on.

The format from my understanding is 256byte sectors, 32 sectors a track

Here's the extraction command I've used:

mfm_util --sectors 32,0 --heads 8 --cylinders 1024 --header_crc 0xffff,0x1021,16,0 --data_crc 0xffffffff,0x140a0445,32,6 --format Intel_iSBC_214_256B --sector_length 256 --emulation_file ./wang_microvp_procom.emu  --extracted_data_file ./sdcard/wang_microvp_procom_part_emu.extracted


Other notes:

Actual data appears to start at offset 80000 - which is the wang2200 File Catalog Index start

Emu File: https://drive.google.com/file/d/1Tna54MDg6Xd3qx3rLwhDhsnOj0ecxiEk/view?usp=sharing

Extraction: 

I'm hoping for some help or pointers around what I can try, some way to set interleave parameters maybe, if anyone has any suggestions, any help appreciated!

If more info is needed let me know.

Thank you

Regards

Alexey

[Alexey Pavlenko]

Extraction from emu file - beginning of the file only: wang_microvp_procom_part_emu_beginning.extracted

Example of what the data should look like (this one has an extra header for the emulator at the start): example_wang_disk_beginning.wvd

[David Gesswein]

Don't think anybody without a wang will be able to figure out what its doing.
Some systems do various mapping from the real disk sectors to what the OS
presents as the disk. Unless that info is in the sector headers which I
didn't see evidence of the mfm emulator can't do anything about it.

There are some odd things I do see. Have bad block set on some sectors.
It may remap them. Cylinder 288, 470, 957 have different format than the
rest of the cylinders. Also cylinders >= 1024.

If wang allows you to access raw disk I would read various sectors and see
how they map the the extracted data file. If the rules for remapping can
be determined that an program can be make to convert extracted data files
from/to format needed by the the computer emulator.

On Thu, Oct 02, 2025 at 09:24:34PM -0700, Alexey Pavlenko wrote:
> Hi all,
>
> I've got a working emu image from a disk from a Wang2200 system - this
> seems to work well on a real system with no problems.
>

> (for context I Posted about this system a little while ago " *Maxtor XT
> 2190 - From a Wang DS (Data Storage Cabinet)*")

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