test$ cat test.jas
.386
cseg segment
assume cs:cseg
main:
        mov eax, "TEXT"

cseg ends
end main
test$ jwasm test.jas
JWasm v2.18, Aug 14 2023, Masm-compatible assembler.
Portions Copyright (c) 1992-2002 Sybase, Inc. All Rights Reserved.
Source code is available under the Sybase Open Watcom Public License.

test.jas: 8 lines, 2 passes, 0 ms, 0 warnings, 0 errors
test$ ~/proj/omfdump/omfdump test.o
80 THEADR       10 bytes, checksum 42 (valid)
   0000: 08 74 65 73 74 2e 6a 61-73                       :  .test.jas
96 LNAMES        7 bytes, checksum 3D (valid)
   [0001] ''
   0000: 00 04 43 53 45 47                                :  .
   [0002] 'CSEG'
   0001: 04 43 53 45 47                                   :  .CSEG
98 SEGDEF16      7 bytes, checksum F7 (valid)
     PARA (A3) PRIVATE (C0) USE32 size 0005
     name 'CSEG'
   0000: 61 05 00 02 01 01                                :  a.....
88 COMENT        5 bytes, checksum A5 (valid)
   [NP=1 NL=0 UD=00] FE ???
   0002: 4f 01                                            :  O.
a0 LEDATA16      9 bytes, checksum 59 (valid)
                segment 'CSEG', offset 0000
   0000: b8 54 58 45 54                                   :  .TXET
8b MODEND32      8 bytes, checksum 5B (valid)
   0000: c1 50 01 00 00 00 00                             :  .P.....
test$