Hey JH,
Here is a Solution for your issue, the missing I and O LEDs in the upper ranges has been an issue for a long time.
http://www.machsupport.com/forum/index.php/topic,10861.0.htmlThat is a Plugin that Maps ALL the missing Inputs and Outputs to LEDs, it is the "Standard OEM" Mach Mill screen, but I Modified the Diagnostic screen with the Missing LEDs.
It does this, and uses these resources:
Inputs:
1). OEMTrigger's 1-15
Outputs:
1). OUTPUT's 7-20
2). Charge Pump, Charge Pump2, and Current Hi/Low
ULED's Used for Input Signals are:
1). 1301-15 is used for OEM trigs 1-15
ULED's Used for Output Signals are:
1). 1316-32 is used for Outputs 7-15,Charge Pump,
Charge Pump2 and Current Hi/Low
Also, if your doing alot of R & D, or customizing, look into Mach MAD, it was built for just that........
scott