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Re: IIGS AppleDisk3.5 device driver code?

From David Schmidt <schmidtd@my-deja.com>
Newsgroups comp.sys.apple2
Subject Re: IIGS AppleDisk3.5 device driver code?
Date 2019-03-22 11:57 -0400
Organization A noiseless patient Spider
Message-ID <q730lo$hav$1@dont-email.me> (permalink)
References <ec3780f5-fad7-48b4-a117-54177af5f15c@googlegroups.com>

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On 3/21/19 4:32 PM, J R wrote:
> I'm a software engineer, and while I was able to get my IIGS to boot with ADTPro and a null modem cable, and I was able to create GSOS boot disks, I was thinking about VSDRIVE.  It*appears*  that you can't use VSDRIVE with GSOS, because although I can install it before booting GSOS, when GSOS runs, it doesn't find the virtual drives.  My guess is that VSDRIVE only works in 8-bit mode or something.... not really sure.  (If someone knows definitively what's going on, that would be appreciated).

The code I used to learn how to poke at the SCC is here:
http://www.apple2.org.za/gswv/a2zine/Utils/Z8530_SCCsamples_info.txt
It has some cautionary tales in there about how to interact with the 
serial port in a running system - sharing interrupts and whatnot.  The 
ADTPro serial layer plays fast and loose with the hardware, and takes 
full advantage of the fact that it's the only game in town - which would 
definitely not be the case if it were running under GSOS.  Even running 
ADTPro as a ProDOS 8 app shelled out of GSOS fails because it doesn't 
get all the time it needs with the SCC hardware; too many interrupts are 
stolen.

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Thread

IIGS AppleDisk3.5 device driver code? J R <calphool@gmail.com> - 2019-03-21 13:32 -0700
  Re: IIGS AppleDisk3.5 device driver code? D Finnigan <dog_cow@macgui.com> - 2019-03-21 20:53 +0000
  Re: IIGS AppleDisk3.5 device driver code? Tim Buchheim <tim1724@gmail.com> - 2019-03-21 14:20 -0700
    Re: IIGS AppleDisk3.5 device driver code? Stephen Heumann <stephenheumann@gmail.com> - 2019-03-21 15:57 -0700
      Re: IIGS AppleDisk3.5 device driver code? Antoine Vignau <antoine.vignau@laposte.net> - 2019-03-21 22:06 -0700
      Re: IIGS AppleDisk3.5 device driver code? J R <calphool@gmail.com> - 2019-03-22 07:04 -0700
        Re: IIGS AppleDisk3.5 device driver code? Stephen Heumann <stephen.heumann@gmail.com> - 2019-03-22 20:14 -0500
  Re: IIGS AppleDisk3.5 device driver code? David Schmidt <schmidtd@my-deja.com> - 2019-03-22 11:57 -0400
    Re: IIGS AppleDisk3.5 device driver code? J R <calphool@gmail.com> - 2019-03-22 09:23 -0700
      Re: IIGS AppleDisk3.5 device driver code? David Schmidt <schmidtd@my-deja.com> - 2019-03-22 12:31 -0400

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