So I got this machine, after finding no information about Osborne machine I opened it up and found out that its the same machine as commodore pc50.

Machine didn't have memory and strangely all ribbon cables were removed. After installing some memory and cables, even the original 40mb hardrive started working.
I replaced hardrive with xt-ide and issue I'm having is that bios has some kind of auto detect routine and always when I start or even soft reboot the machine it tries to detect the hardrive and fails after around two minutes, then I have to enter bios and set drive to none and reboot then machine works just fine. It always tries to set the drive to type36. I replaced bios battery and bios seems to retain other settings time, date... etc.
I'm thinking I should test commodore bios and see if the problem persists.

Another feature of the bios is that it can set ems memory size and address, it doesn't work without specific driver I think, because if I set it, it just shrinks memory size and emm386 cannot use it.
I have to poke around original hardrive and see if it has the driver, although the retroweb has commodore driver.