What is a Sirius?

Hi Pete, Lovely old machine, designed by Chuck Peddle IIRC. It's also known as the "Victor 9000". Usually runs MS-Dos, though CP/M-86 was also available. Supplied with either 128K or 256K RAM on the motherboard and expandable to 768K via a plug in card. The floppy only model had twin 5.25" floppy drives. They used standard 360K floppies but could write up to 1.2Mb to each disc (GCR encoding and variable rotational speed), there may have been a model which used 600K single sided drives too but don't quote me. The HD model had one of the floppies replaced by an internal hard drive. I think 10Mb was the biggest they were ever shipped with but, IIRC, the controller would handle a 20Mb drive. Interestingly the machine used an MFM drive, connected to a SASI to MFM bridge card, in turn connected to a SASI interface card which sat in one of the expansion slots. It had lots of neat features, such as the built in CODEC (great sound for it's day) and the ability to adjust the display's contrast and brightness directly Yeah....I've got one, but without a version of DOS that will see the hard drive it's just sat in a corner right now. TTFN - Pete. -- Hardware & Software Engineer. Sound Engineer. Collector of Arcade Machines, Games Consoles & Obsolete Computers (esp DEC) peter.pachla(a)virgin.net | peter.pachla(a)vectrex.freeserve.co.uk | peter.pachla(a)wintermute.free-online.co.uk | www.wintermute.free-online.co.uk --