dragon@olivej.atc.OLIVETTI.COM (Give me a quarter or I'll touch you) (09/20/88)
In article <8809190537.AA09957@ucbvax.Berkeley.EDU>, V61@DHDURZ1.BITNET (Ronald Lamprecht) writes: > - Someone asked if it would be possible to install a ST157 (3"1/2) > instead of the floppy in a ST1040: answer: no : > - harddisks use other mounting screws > - there won't be enough space to mount the interface with the > OMTI controller (especially if you plan or have added an 68020, > memory expansions or SRAMs instead of (E)PROMs) > - hardisks need a lot of power and the ATARI power supplies are > weak (HD-Requirement: c 2A on 12V at power-up, c1A at 5V -- > critical at seek operations) I've done this. I had to use an Atari host adaptor board (since it is the smallest), but it is quite possible, and was a hit at our local user group meeting. Might add that it was an ST157N, with imbedded SCSI. It uses the exact same holes that the 3.5" floppy does. As Ron said, if you plan to add alot of other crud, it's not a good idea, though. The power supply was beefed by replacing the regulators with higher capacity units, and a fan was installed to keep everything cool. Otherwise, it works great. The power supply can't be that big of a deal because Supra sells their internal drive kits for the Mega ST, and they run off the Mega internal power supply (which happens to be the same unit in my 520STfm, but different than the one in the 1040ST the hard drive is mounted in. I bet the newer 1040STs have the same power supply). ---- Dean Brunette {ucbvax,etc.}!hplabs!oliveb!olivej!dragon Olivetti Advanced Technology Center _____ _____ __|__ _____ 20300 Stevens Creek Blvd. | | _____| | | Cupertino, CA 95014 |_____| |_____| |__ |_____ 'Dancing, screaming, itching, squealing, fevered feeling hot Hot HOT!'