Late March work

2024-03-31

• Do not use AX in LINKCALL ELD
• Fix builds without history or with history in the data/entry segment
• Fix, do not parse opening paren of linear address as part of the expression
• Documentation updates

• Pick SvarDOS kernel patches since January
• compbios, compbdos: Port to ia16 gcc with libi86 by using a far buffer for input (1, 2, 3)

• ELD to read/write file data to arbitrary address (multiple segments, do segment arithmetic in 86M or PM)
• ELD to get (into variable) or set DOS allocation strategy or UMB link status