The Programmer's Guide to TRSDOS Version 6 - Tim Mann's Home ...

Bit 5 If set, it indicates that FORMS is active.
Bit 6 If set, it indicates that KSM is active.
Bit 7 Set if printer supports block graphics for screen print.
EFLAG$
This flag byte is used to indicate the presence of an Extended Command Interpreter
(ECI) program in the SYS13/SYS slot. A non-zero value indicates that the user's
ECI be used to interpret the command line instead of the system's command
interpreter. On entry to your ECI, bits 4-6 of this flag are imaged in the
accumulator and are available for immediate test.
IFLAG$
This flag is used in international systems. Bit assignments are:
Bit 0 Set to indicate French.
Bit 1 Set to indicate German.
Bit 2 Set to indicate Swiss.
Bit 3 reserved
Bit 4 reserved
Bit 5 reserved
Bit 6 Special DMP mode on/off.
Bit 7 Set 7-bit ASCII mode on/off.
KFLAG$
Bit 0 Set to "1" if BREAK pressed (see KFLAG interfacing and the @CKBRKC SVC-105).
Bit 1 Set to "1" if PAUSE pressed (see KFLAG interfacing).
Bit 2 Set to "1" if ENTER pressed (see KFLAG interfacing).
Bit 3 Reserved by DOS.
Bit 4 Reserved by DOS.
Bit 5 Set to "1" if in CAPS lock mode of the keyboard.
Bit 6 Reserved by DOS.
Bit 7 Set to "1" if a character is in the type-ahead buffer.
LFLAG$
Bit 0 If set, FORMAT will not prompt for step rate.
Bit 1 reserved
Bit 2 reserved
Bit 3 reserved
Bit 4 If set, FLOPPY/DCT will inhibit the 8" query.
Bit 5 If set, FORMAT will not prompt for number of sides.
Bit 6 Reserved for Interrupt Mode 2 hardware.
Bit 7 Reserved for Interrupt Mode 2 hardware.
MFLAG$
This flag is machine specific. It is used to contain an image of a particular CPU
port. For instance, on the TRS-80 Model 4, this is an image of the MODOUT port
(X'EC').
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