C:\>ldebug -tsr Patched PSP at 2788, now resident. - -g C:\>ver /r FreeCom version 0.87 - GNUC - XMS_Swap [Sep 27 2025 23:23:16] DOS version 5.38 lDOS (2026 March) based on MS-DOS v4.01 C:\>int3 z:foo a:bar Unexpected breakpoint interrupt AX=00FF BX=00FF CX=00FF DX=2788 SP=FFFE BP=091C SI=0100 DI=FFFE DS=2788 ES=2788 SS=2788 CS=2788 IP=0101 NV UP EI PL ZR NA PE NC 2788:0101 B8004C mov ax, 4C00 -d psp:5C FF 2788:0050 - 1A 46 4F 4F .FOO 2788:0060 20 20 20 20 20 20 20 20-00 00 00 00 00 02 72 AC ......r. 2788:0070 35 10 15 FE FF 40 43 F2-00 00 00 00 4E 44 2E 43 5....@C.....ND.C 2788:0080 0C 20 7A 3A 66 6F 6F 20-61 3A 62 61 72 0D 00 41 . z:foo a:bar..A 2788:0090 55 54 4F 45 58 45 43 2E-42 41 54 0D 00 00 00 00 UTOEXEC.BAT..... 2788:00A0 00 00 17 00 20 20 20 20-20 0D 0A 24 08 00 FC 01 .... ..$.... 2788:00B0 00 45 98 33 08 45 98 7A-08 45 98 8A 08 45 98 04 .E.3.E.z.E...E.. 2788:00C0 00 01 00 6A 02 7B 18 00-20 20 20 20 20 20 20 20 ...j.{.. 2788:00D0 20 20 20 00 00 00 00 00-20 20 20 20 20 20 20 20 ..... 2788:00E0 20 20 20 00 00 00 00 01-20 0D 00 00 00 00 00 00 ..... ....... 2788:00F0 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 ................ - C:\>ldebug -tsr Patched PSP at 2788, now resident. -bp at ptr ri21p when ah==4B -g C:\>int3 z:foo a:bar Hit permanent breakpoint 00 AX=4B00 BX=08AA CX=C00F DX=072A SP=089E BP=4350 SI=0FB2 DI=4306 DS=C00F ES=C00F SS=C00F CS=B380 IP=008C NV UP DI PL NZ NA PE NC B380:008C EB10 jmp 009E -dw es:bx header 0 2 4 6 8 A C E 0123456789ABCDEF C00F:08A0 - 0000 0080 C001 ...... C00F:08B0 06E0 C00F 0705 C00F-0000 0000 0000 0000 ................ C00F:08C0 F69E F000 1276 2760-0001 0001 6220 0000 ....v.`'.... b.. C00F:08D0 0000 0000 2788 0000-35AC 42E8 0000 21CD .....'...5.B...! C00F:08E0 2ABA 8E07 BBC1 08AA-00B8 CD4B 7221 3102 .*........K.!r.1 C00F:08F0 FCC0 C98C D18E A4BC-8E08 A3D9 08DC 48B4 ...............H C00F:0900 1E8B 08C4 21CD 6472-C389 1E2B 08D4 A353 .....!rd..+...S. C00F:0910 08D4 0BB4 C6BE FF08-C01E 5B08 F883 7501 ...........[...u C00F:0920 8946 01E5 025E 58CB-534D F...^..XMS -d C00F:6E0 l C C00F:06E0 1A 46 4F 4F 20 20 20 20-20 20 20 20 .FOO -d C00F:705 l C C00F:0700 35 50 05-33 00 3C 43 0C 15 33 00 5P.3.