JRE103@psuvm.psu.edu (James R. Evans Jr.) (05/04/91)
I was just curious about these ADB accessories that I always see advertised
in the Mac magazines. They have stuff like scanners and the like which simply
hook into the ADB. Why do they chose to use the ADB? Would these things work on
the GS if there were drivers to support them? I am just curious why they use
it instead of SCSI or something. I guess when you don't have slots, you have to
be creative. ;-)
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----------------------------------------unknown@ucscb.UCSC.EDU (The Unknown User) (05/05/91)
In article <91123.234210JRE103@psuvm.psu.edu> JRE103@psuvm.psu.edu (James R. Evans Jr.) writes: > I was just curious about these ADB accessories that I always see advertised >in the Mac magazines. They have stuff like scanners and the like which simply >hook into the ADB. Why do they chose to use the ADB? Would these things work on > the GS if there were drivers to support them? I am just curious why they use >it instead of SCSI or something. I guess when you don't have slots, you have to > be creative. ;-) Yes they can be used on the GS. Just like SCSI, ADB is ADB.. that is, any computer with an ADB bus (Macs & the GS) can use any ADB devices. Drivers must be written for some things, but trackballs work already... Why use ADB instead of SCSI? Uhh, I would guess it's easier to design something to work with ADB than SCSI... I can't really explain it, but it seems obvious why people's use ADB over SCSI.. heh... -- /unknown@ucscb.ucsc.edu Apple IIGS Forever! unknown@cats.ucsc.edu\ |WANT to help get ULTIMA VI //e or GS written?-mail me. CHEAP CD info-mail me.| \ It's a Late Night World.... Of Love /
daveh@ccwf.cc.utexas.edu (Dave Huang) (05/06/91)
In article <91123.234210JRE103@psuvm.psu.edu> JRE103@psuvm.psu.edu (James R. Evans Jr.) writes: | I was just curious about these ADB accessories that I always see |advertised in the Mac magazines. They have stuff like scanners and |the like which simply hook into the ADB. Why do they chose to use the |ADB? Would these things work on the GS if there were drivers to |support them? I am just curious why they use it instead of SCSI or |something. I guess when you don't have slots, you have to be |creative. ;-) Scanners on the ADB? It doesn't sound very likely, considering that the ADB bus transmits at around 500 characters/second. Sending those megabyte pictures at that rate would not be my idea of fun! I'm pretty sure that the Mac scanners do use SCSI. I know Apple's scanner does, and so do a few others... |\ Jim (of course) Evans JRE103@psuvm.psu.edu \ -- David Huang | Internet: daveh@ccwf.cc.utexas.edu | "One with a face made of metal UUCP: ...!ut-emx!ccwf.cc.utexas.edu!daveh | should not use the word 'rust'" America Online: DrWho29 |
mattd@Apple.COM (Matt Deatherage) (05/06/91)
In article <15409@darkstar.ucsc.edu> unknown@ucscb.UCSC.EDU (The Unknown User) writes: > > Yes they can be used on the GS. Just like SCSI, ADB is ADB.. >that is, any computer with an ADB bus (Macs & the GS) can use any ADB >devices. Drivers must be written for some things, but trackballs work >already... > The Mac has one more advantages in ADB (discounting that most Macs have two ADB ports): It has a true ADB Manager that resolves and remaps conflicts in ADB devices. For example, if you have two keyboards connected to a IIgs, you'll get keys on either of them responding as if they were connected to "the" keyboard. (Dave Lyons talks about doing this in Iowa to play multi-player games; one person could hit Ctrl-Esc and the other could hit the Open Apple key, and into the CDA menu you'd go!) On a Mac, one keyboard would be remapped to be a different keyboard and input could be accepted from it separately. On the IIgs, you have to do this yourself in programs that want the keyboards to behave this way. > Why use ADB instead of SCSI? Uhh, I would guess it's easier to >design something to work with ADB than SCSI... I can't really explain it, >but it seems obvious why people's use ADB over SCSI.. heh... >-- I'm not a hardware guy; I don't know from "harder". SCSI is an open standard that anyone can get, understand and use. ADB is proprietary and the necessary documents only come from Apple's Software Licensing department. They may have more information than just specs (like maybe chips, for example) but I still think SCSI is a more accessible way to go about things. -- ============================================================================ Matt Deatherage, Developer Technical | The opinions expressed herein are Support, Apple Computer, Inc. | not those of Apple Computer, and Personal mail only, please. Thanks. | shame on you for thinking otherwise. ============================================================================