rdt154k@monu6.cc.monash.edu.au (mr n benci) (02/15/91)
I have posted twice in regards to how do you convert the DMA port to SCSI configuration. So far no one has given even a hint as to how to do it. All that I have been told is to go and by either an ICD or BMS200 host adapter. I'm sorry to say that I am a technical junkie. I would really like to know. It seems ridiculous that I can find out how an ST506 is connected and operating on a PC, a SCSI drive is connected and operating on a SUN, on an AMIGA and on a MAC. BUT no where can I get info for the ST. Is this a deep dark secret, is it labeled as 'EYES ONLY', WHAT GIVES ?? If this info is non-disclosure material then say so and I'll quit asking, but if it isn't then why wont anyone offer me some advice. Yes there are still a few who are willing to build there own hardware addons. Thanks in advance. ------------------------------------------------------------------------------ * Nino Benci. * Confucious say * * Monash University, Caulfield Campus * 'Never stand alone against * * Physics Department * ignorance' * * 900 Dandenong Rd, Caulfield East **************************************** * VIC, 3145. Australia. * * Tel (61) (3) 573 2355/2519. Fax (61) (3) 573 2350 * * email oz: rdt154k@monu6.cc.monash.oz.au * * email world: rdt154k%monu6.cc.monash.edu.au@uunet.uu.net * ------------------------------------------------------------------------------
csbrod@immd4.informatik.uni-erlangen.de (Claus Brod) (02/18/91)
rdt154k@monu6.cc.monash.edu.au (mr n benci) writes: >I have posted twice in regards to how do you convert the DMA port to >SCSI configuration. So far no one has given even a hint as to how to do it. >All that I have been told is to go and by either an ICD or BMS200 host >adapter. I'm sorry to say that I am a technical junkie. I would really like >to know. It seems ridiculous that I can find out how an ST506 is connected >and operating on a PC, a SCSI drive is connected and operating on a SUN, >on an AMIGA and on a MAC. BUT no where can I get info for the ST. Is this a >deep dark secret, is it labeled as 'EYES ONLY', WHAT GIVES ?? Many of the informations you need for a ACSI/SCSI host adapter is in the ACSI specifications from ATARI. If you're a registered developper, you get a copy of them. I have written a (German) book on floppies and harddisks, and the harddisk part might also clarify most of your questions. The whole matter, however, is too complex to discuss it thoroughly in this conference. Since the ST DMA bus is not very stable all in all and its timings vary from revision to revision (remember those IMP chips?), you're in for lots of trouble when designing a host adapter of your own (trust me, I was partly involved in the development of a new host adapter; it took about a year of intensive testing before the damn thing worked reliably with any ST they could get). Therefore, you were given the hint to better forget it and get a commercial solution. ---------------------------------------------------------------------- Claus Brod, Am Felsenkeller 2, Things. Take. Time. D-8772 Marktheidenfeld, West Germany (Piet Hein) csbrod@medusa.informatik.uni-erlangen.de ----------------------------------------------------------------------