Bitfields for flags 1:
Bit(s)	Description	)
 0	-NOPAGE specified
 1	-A20 specified
 2	-VDISK specified
 3	-XT specified
 4	-AT specified
 5	-MCA specified
 6	-EISA specified
 7	-NORMRES specified (NEC only)
 8	-HIGHRES specified (NEC only)
 9	set if -SWFGROW1ST, clear if -NOSWFGROW1ST
 10	-NOVM specified
 11	-SAVEREGS specified
 12	unused (clear)
 13	-NOVCPI specified
 14	-NOMUL specified
 15	-NOBMCHK specified
 16	-NOSPCLMEM or -NOBIM
 17	-NOPGEXP specified
 18	-SWAPDEFDISK specified
---v3.0+ ---
 19	-SAVEINTS specified
 20	-NOLOAD specified
 21	-PAGELOG specified
 22	-OPENDENY specified
 23	-ERRATA17 specified
---v4.1+ ---
 24	-NESTDPMI specified
 25	-NONESTDPMI specified
 26	-NODPMI specified
 27	-NOPCDWEITEK specified
---v4.2+ ---
 28	-WININT21 specified