Int E0 - Real/32 - "c_mode" - Get/set Console Mode [O]
CL = 6Dh
DX = new console mode (see #3788), or FFFFh to get current mode
Return: AX = status if setting (0000h = success)
AX = current console mode if DX=FFFFh on entry
Bitfields for REAL/32 console mode:
Bit(s) Description (Table 3788)
0 C_STAT function will return 01h only when Ctrl-C is pressed
1 disable support for stop/start scroll (Ctrl-S/Ctrl-Q)
2 raw console output (no tab expansion, no printer echo)
3 disable program termination on Ctrl-C
7 disable Ctrl-O console bit-bucket
10 enable Esc as end-of-line character