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Groups > comp.os.msdos.programmer > #4214
| From | wolfgang kern <nowhere@nospicedham.nevernet.at> |
|---|---|
| Newsgroups | comp.os.msdos.programmer, comp.lang.asm.x86, alt.lang.asm |
| Subject | Re: TR util for DOS |
| Date | 2023-01-02 11:53 +0100 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <toud45$643$1@gioia.aioe.org> (permalink) |
| References | <20221223155428.cffff42388521c7edcc7fc41@127.0.0.1> <20221230102429.07cf00658a86b4eae37b2c85@127.0.0.1> <20221230213612.5365d824afb3f42b710a0546@127.0.0.1> <20221231205235.58f626ebf44ce26ca6e79486@127.0.0.1> |
Cross-posted to 3 groups.
On 31/12/2022 21:52, Kerr-Mudd, John wrote: >>>> example text to unrot: >>>> >>>> Onebarff Znetnerg Gungpure! >>> Now allows >1 space between the strings! (but no error checking) >> Now 90 bytes, assumes that at start ax=0,bh=0 and that cx > lth of >> parameters. >> I think that's as small as I can manage. > [duff code dump] > I see no-one (including me,til now!) has tested it. it works under grdb > because bp is 0 at start. Not in native DOS/XP cmd box though. > Fix by using di instead of bp. > -> d 100 l5A > 1637:0100 99 BF 5A 01-AA FE C0 75-FB B3 83 B0-20 89 DF F2 ..Z....u.... ... > 1637:0110 AE F3 AE 89-FE 80 F2 01-74 04 88 85-5A 01 97 87 ........t...Z... > 1637:0120 DE 80 3C 2D-75 08 40 3A-44 01 76 E9-46 46 AC 3C ..<-u.@:D.v.FF.< > 1637:0130 27 75 E2 BA-5A 02 31 DB-89 D6 89 F7-B9 A5 FD B4 'u..Z.1......... > 1637:0140 3F CD 21 91-E3 13 BB 5A-01 51 AC D7-AA E2 FB 59 ?.!....Z.Q.....Y > 1637:0150 BB 01-00 B4 40 CD-21 EB DD C3 ....@.!... > -> q >> Wolfgang, would you like it in asm? here it is - :) Happy New Year! I actually had no idea what this is supposed to do... if it is something like ROT13 I dunno the required algo. but code parts look suspicious as if compiled by good old BASIC. >> -> u 100 l5A >> 1637:0100 99 cwd >> 1637:0101 BF 5A 01 mov di,015A >> 1637:0104 AA stosb >> 1637:0105 FE C0 inc al >> 1637:0107 75 FB jnz 0104 >> 1637:0109 B3 83 mov bl,83 >> 1637:010B B0 20 mov al,20 >> 1637:010D 89 DF mov di,bx >> 1637:010F F2 AE repnz scasb >> 1637:0111 F3 AE repz scasb >> 1637:0113 89 FE mov si,di >> 1637:0115 80 F2 01 xor dl,01 >> 1637:0118 74 04 jz 011E > change bp to di in the next 2 lines: > ;> 1637:011A 88 86 5A 01 mov [bp+015A],al > ;> 1637:011E 95 xchg ax,bp > > 1637:011A 88 85 5A 01 mov [di+015A],al > 1637:011E 97 xchg ax,di > >> 1637:011F 87 DE xchg bx,si >> 1637:0121 80 3C 2D cmp byte [si],2D >> 1637:0124 75 08 jnz 012E >> 1637:0126 40 inc ax >> 1637:0127 3A 44 01 cmp al,[si+01] >> 1637:012A 76 E9 jbe 0115 >> 1637:012C 46 inc si >> 1637:012D 46 inc si >> 1637:012E AC lodsb >> 1637:012F 3C 27 cmp al,27 >> 1637:0131 75 E2 jnz 0115 >> 1637:0133 BA 5A 02 mov dx,025A >> 1637:0136 31 DB xor bx,bx >> 1637:0138 89 D6 mov si,dx >> 1637:013A 89 F7 mov di,si >> 1637:013C B9 A5 FD mov cx,FDA5 >> 1637:013F B4 3F mov ah,3F >> 1637:0141 CD 21 int 21 >> 1637:0143 91 xchg ax,cx >> 1637:0144 E3 13 jcxzw 0159 >> 1637:0146 BB 5A 01 mov bx,015A >> 1637:0149 51 push cx >> 1637:014A AC lodsb >> 1637:014B D7 xlat [bx] >> 1637:014C AA stosb >> 1637:014D E2 FB loopw 014A >> 1637:014F 59 pop cx >> 1637:0150 BB 01 00 mov bx,0001 >> 1637:0153 B4 40 mov ah,40 >> 1637:0155 CD 21 int 21 >> 1637:0157 EB DD jmp 0136 >> 1637:0159 C3 ret __ wolfgang
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TR util was Fw: Re: Filesystem vs file system "Kerr-Mudd, John" <admin@127.0.0.1> - 2022-12-23 15:54 +0000
Re: TR util for DOS "Kerr-Mudd, John" <admin@127.0.0.1> - 2022-12-30 10:24 +0000
Re: TR util for DOS "Kerr-Mudd, John" <admin@nospicedham.127.0.0.1> - 2022-12-30 21:36 +0000
Re: TR util for DOS "Kerr-Mudd, John" <admin@nospicedham.127.0.0.1> - 2022-12-31 20:52 +0000
Re: TR util for DOS wolfgang kern <nowhere@nospicedham.nevernet.at> - 2023-01-02 11:53 +0100
Re: TR util for DOS "Kerr-Mudd, John" <admin@nospicedham.127.0.0.1> - 2023-01-02 13:51 +0000
Re: TR util for DOS "Kerr-Mudd, John" <admin@nospicedham.127.0.0.1> - 2023-01-07 16:34 +0000
Rot13 for DOS "Kerr-Mudd, John" <admin@nospicedham.127.0.0.1> - 2023-01-22 09:24 +0000
Re: Rot13 for DOS Terje Mathisen <terje.mathisen@nospicedham.tmsw.no> - 2023-01-25 15:03 +0100
Re: Rot13 for DOS "Kerr-Mudd, John" <admin@nospicedham.127.0.0.1> - 2023-01-25 17:02 +0000
Re: Rot13 for DOS "Kerr-Mudd, John" <admin@nospicedham.127.0.0.1> - 2023-01-27 09:57 +0000
Re: Rot13 for DOS "Kerr-Mudd, John" <admin@nospicedham.127.0.0.1> - 2023-01-27 13:30 +0000
Re: Rot13 for DOS "Kerr-Mudd, John" <admin@nospicedham.127.0.0.1> - 2023-11-18 11:10 +0000
Re: Rot13 for DOS "Kerr-Mudd, John" <admin@nospicedham.127.0.0.1> - 2023-11-18 16:16 +0000
Re: Rot13 for DOS "Kerr-Mudd, John" <admin@nospicedham.127.0.0.1> - 2023-11-18 22:19 +0000
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