v1.7

Upgrade to DSKF command, to show SD-card free space (Mb), when issuing DSKF(1)
DSKF(2) returns a dummy 65355 (board test purposes)

v1.6

Fixing command processing for data-handling statements: PRINT# and INPUT#

v1.5

New DSKF output

v1.4

Including OPEN# PRINT# INPUT# and KILL commands
Changed DSKF 1 return value to 4680

PCB version 1 tested

PCB version 1 tested on manufactured boards.
Firmware attached