12 May
1998
12 May
'98
9:04 p.m.
Early versions of the Apple //c didn't have the support for 3.5"
drives. Mine is like that. You can check which version of the //c
you have by going into Applesoft and doing a PRINT PEEK(64447). If
it returns 255 then you have an original //c. The tech ref shows 3
basic versions and their ID bytes as follows:
Original //c : ID Byte = 255
UniDisk //c : ID Byte = 0
Added 3.5" support
Increased ROM to 256K
Some new serial port commands
Mini-assembler
New monitor commands
Built-in diagnostics
Improved interrupt handler & external drive startup
Memory Expansion //c : ID Byte = 3
Added internal memory expansion connector
Change RAM ICs
Moved mouse from slot 4 to slot 7
New version of Protocol Converter called SmartPort
Hope that helps.
On 13 May 98 at 6:41, Doug Spence wrote:
It physically plugs into my Apple //c, but I can't
get the machine
to recognize it. The drive makes a noise when I power up the
computer, but that's all. Attempts to access S6, D2 or any other
slot and drive combination doesn't get anywhere.
-----
David Williams - Computer Packrat
dlw(a)trailingedge.com
http://www.trailingedge