Texas Instruments 660 - Manual (Page 22)

1-14 General Description
PC-Doctor is typically user-friendly but if you don't understand a feature, context-
sensitive help information is available at any time by pressing the
F1 function key;
pressing the F1 function key twice accesses the online Technical Reference Manual for
PC-Doctor.
A powerful set of utilities within PC-Doctor (that can be run locally or remotely) simplify
the task of determining system configuration data, allocating and using system memory,
IRQ and DMA use, what device drivers are installed, what COM and LPT ports are
assigned and what ports are available, identifying partitioning data for fixed disk
drive(s), determining the VGA setup information, reading the software interrupts/
interrupt vectors, etc.
Note: Refer to Troubleshooting Procedures (Section 5) for additional information
regarding the Diagnostics Program.