Bugfixes:

* format mz: stack segment was never written - a fault if it isn't
located at the end of the binary; see stack1.asm.

* format mz,pe: start offset for first segment may have resulted in
an invalid binary; see org1.asm & org2.asm.

* fastcall 32-bit (MS style): registers may have hold float arguments.

* no 'implicit far jmp/call to near label' error in pass one; see
group7.asm.

* option -D: accept white spaces if option is enclosed in double quotes
( Masm compatible ).

* subtraction of 2 labels may have caused error "constant value too large";
see minus1.asm.

* if .model wasn't flat, but segments with flat attribute existed, they
may not have been listed in symbol table.

* regression in v2.05-v2.18, DUP operator: if an undefined symbol was
contained in first operand, error message may have been omitted; see
struct43.asm.

* local labels were accepted by PUBLIC directive without -Zm being set;
see public3.asm.

* omf format: incorrect special handling of assembly-time variable fixups
removed; see label9.asm.

* if a 32-bit offset was to initialize a WORD variable, no error was
emitted; see data11.asm.

* address size prefix was missing for indirect addressing if a segment
prefix was used and both the prefix and the current code segment were
32-bit (but not flat); see pref67a.asm.

Other changes:

* write listing reworked.

* option -pe: add segments with combine type stack - they may contain
initialized data.

* JWasmr.exe: option -Sz removed.

* PUSHW will emit warning "magnitude of offset exceeds 16-bit" if
operand is a 32-bit offset.

* using 'option oldmacros' will cause a warning only.

* option -pe: info section ".drectve" will be scanned and some linker
options are recognized and handled.

* PUBLIC directive extended to allow setting the export attribute.

* PAGE directive: syntax check added.

* .model flat: ensure variables in 16-bit segments can be accessed
directly if segment register is assumed flat ( Masm compatible );
see flat2.asm.

* option -bin: to create an "alignment" segment/section that modifies
the RVA only, the ALIGN() segment attribute syntax has been extended.

* sample Win32_1p.asm added, sample Win32_5.asm adjusted.

* option -Zne: now makes jwasm refuse name after .CODE if model is tiny;
see simpseg1.asm.

* debug option -dma added to display memory allocations.

* error msg "cannot use 16-bit register with a 32-bit address" is now
emitted if a 16-bit register is used for indirect addressing and the
associated segment register is assumed flat; see assume14.asm.

mirrored from https://github.com/Baron-von-Riedesel/JWasm/releases/tag/v2.19