Re: Problem with Apple II 3.5 Disk Controller Card on Apple IIe

["Dave Althoff, Jr." <dalloff@gcfn.org>]

Wayne Stewart <waynes@telus.spamless.net> wrote:
: 
: 
: Iosaef the Irascable! wrote:
: 
:> Wayne,
:> 
:>      While I've not drug out my unenhanced IIe to test that, perhaps
:> it's that (at least my) Transwarp has a 65C02?
: 
: The TransWarp does have a 65C02 but a 65C02 alone won't allow an
: unenhanced IIe or II+ to auto-boot off the superdrive. I've replaced the 
: 6502 in my II+ with a GTE 65SC02. It won't auto-boot of the superdrive
: on its own but if I install a TransWarp it will.

Doesn't the TransWarp have it's own boot code on it that supercedes that 
in the normal Apple ROM?  If so, then the TransWarp would be replacing 
the standard Autostart ROM or ][e ROM with its own Superdrive-aware boot 
code.

Just a guess on my part, but it would explain the behavior...I suspect 
that the signature bytes on the Superdrive card are not recognized by the 
earlier ROM versions as a bootable device, so the boot code skips over 
that slot during the startup scan.  Remember, the Autostart ROM or the 
earlier ][e ROM is specifically looking for a Disk ][ controller card, 
not a generic boot device...  8-)

--Dave Althoff, ][.
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