Re: A86: user-link routine...??
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Re: A86: user-link routine...??
it's called after the first byte of the header of a silent like command
is recieved but before the three remaining bytes in the header are
recieved. there is no way to tell what the command is at this point.
(unless you _really_ want to cheat)
this byte (should be $06?, the device id byte) is in a when the interrupt
is called and should be preserved unless you want to interfere with
silent linking in some way
z80 interrupts are disabled during this routine and you probly shouldn't
enable them.
if you take too much time here the transmitting device will probably time
out
silent link commands are recognized in the _getkey loop so that's where
this will be called from
you also need to set 4,(iy+$23) to enable it
rom page $d is not loaded
-josh
On Fri, 23 Jun 2000 01:21:18 -0400 "mark shroyer" <niten@angelfire.com>
writes:
>
> I've read about a user-link routine that can be established at $d3c7
> (assuming a 200 byte limit, same as the user-int routine?) with a
> single-byte checksum stored at $d3c6 (again, assuming it is
> calculated like the user-int checksum: the sum of the zeroeth byte
> and every $28th byte from $d3c7+$27?), and with an activation flag
> at the ^4 bit of iy+$23... does anyone know exactly when this user
> link routine might be triggered? When a file is sent or received? On
> the connection of a link cable?
>
> I crashed my calc when I attempted to implement this routine, so I'd
> be tickled if anyone could enlighten me on how this thing is used...
> :)
>
> -niten
>
>
> Angelfire for your free web-based e-mail. http://www.angelfire.com
>
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