Print the right drive in DIR listings

[eduardocasino]

Problem: when issuing a DIR command on a drive other than the current one, the latter is used in the listing. Examples:

A>DIR B:
A: ATBASIC  TXT : BEDIT    TXT
A: ASM      TXT
A>

B>dir a:hello.pas
B: HELLO    PAS
B>

This patch checks if there is a drive number in the user FCB and, if so, uses it instead of the current one:

A>DIR B:
B: ATBASIC  TXT : BEDIT    TXT
B: ASM      TXT
A>

[davidgiven]

Doing:

dey
tya
zif_pl ; if the drive was 0, A will now contain 0xff
  jsr bdos_GETDRIVE
zendif

...ought to save a whole three bytes here! (zelse is expensive.)

[eduardocasino]

Fair enough, but then it has to be zif_mi, not zif_pl 😉

[davidgiven]

Whoops, yes!

[davidgiven]

Thanks very much!