It's apparently a Mustek hand scanner "interface" card.

After a quick google search with the FCC ID (HWF95HSIF940) this is my result:

http://www.pc-schnulli.de/hardw/iocard/iodiv.html
https://fccid.io/HWF95HSIF940

Application: Scanner Interface Card If a scanner is provided with this card it must incorporate ferrite cores as documented in filing.
Equipment Class: JBP - Part 15 Class B Computing Device Peripheral
Driver and Software Downloads: Driver Download

Applicant Information
Applicant's complete, legal business name: Mustek Systems Inc
FCC Registration Number (FRN): 0008955965
Alphanumeric FCC ID: HWF95HSIF940
Unique Application Identifier: aPbeiEgJeg4EhfnRHcgUkQ==
Line one: No. 25, R&D; Rd. II
Line two: Science Based Industrial Park
City: Hsin-chu
State: N/A
Country: Taiwan

and I was so excited to have found a solution to my mouse problem ;-;.
Oh well, thanks. Hopefully this thread will help someone in the future,

SRQ wrote:

Is there anyway to convert PS/2 to bus mouse or serial without buying anything? god i want a mouse for this so bad ;-;

Tried Ebay for a ps/2 to serial convertor?

I don't have any mice that I know would work, so I might as well just get a serial mouse.
Totally 100% broke though. I really wish there was some sort of joy to mouse/keyboard mouse emulator for DOS.

OH SO IT IT TURNS OUT THAT EXACT THING EXISTS
http://www.lanet.lv/simtel.net/msdos/mouse.html

I shall have to try it later.

E: They don't work. One actually emulates keyboard keys (Why in the hell it would be called a joystick to mouse TSR I have no idea) and the one that appears to work makes the 486 run at 8080 speeds, if not slower.

i'll take advantage of this thread and i'll ask... what the heck is this card?

Taken from a really old 286 ages ago, along with a Paradise Vga.

I'm guessing it's an audio card ? There's an rca output (or input?) but why the serial port?

> i'll take advantage of this thread and i'll ask... what the heck is this card?

It has all components a MPU401 card would need.

It says CMS but it doesn't look like a Creative Music System to me.

I agree that it's probably an MPU401... No other markings on it?

My Midiman MM401 has a DE9 for midi in/out and a single RCA jack for a metronome output, much like your card.

h-a-l-9000 wrote:

>
It has all components a MPU401 card would need.

Ozzuneoj wrote:

... No other markings on it?

My Midiman MM401 has a DE9 for midi in/out and a single RCA jack for a metronome output, much like your card.

Many thanks it's a good start, i'll try finding the 'serial port' pinout now.
And no, no brands or markings excluding the Eprom version and the 'made in usa' logo

If it's anything like the Midiman, this should help:
MIDIMAN MM-401 breakout cable

Apparently the company was "Computer Music Supply". Adverts posted in a 1989 edition of PCMag.
https://books.google.ca/books?id=h6qtgYAzqDgC … %20card&f=false

This is likely a revised version of the CMS-401.