Path: utzoo!attcan!uunet!seismo!sundc!pitstop!sun!oliveb!amiga!boing!dale From: dale@boing.UUCP (Dale Luck) Newsgroups: comp.sys.amiga.tech Subject: Re: A2090. ST506/ST412 Message-ID: <405@boing.UUCP> Date: 28 Sep 88 06:32:08 GMT References: <8809250346.AA23887@cory.Berkeley.EDU> Reply-To: dale@boing.UUCP (Dale Luck) Organization: Boing, Milpitas, Ca. Lines: 25 In article <8809250346.AA23887@cory.Berkeley.EDU> dillon@CORY.BERKELEY.EDU (Matt Dillon) writes: > > In anycase, four select lines means 16 heads. It is utterly trivial >to support this expansion in controllers since none of these drives support >parallel reads... you select one head at a time. I very strongly suggest >that you guys at C-A implement the line in the A2090. > Both the 2090 and the 2090a board support 16 head st506 drives in hardware, however the early version of rom code only supported 8 heads. This is the rom that holds the z80 code. Months ago I modified the source and created a version of the z80 rom that would support my maxtor-1140 15 head drive and it seemed to work ok. I was told later on that then new rom would make it into the production line and should be on the 2090a boards when they are available. -- Dale Luck Boing, Inc. {cbmvax|oliveb|pyramid}|!amiga!boing!dale Although I do contract work for Amiga-LosGatos, my opinions probably don't represent those of Commodore or its management or its engineers, but I think the world would be a better place if they did.