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GeneralRe: How to write a "Hello World" app in C ... Pin
  Forogar  9-Jun-21 3:57
professional  Forogar  9-Jun-21 3:57 
GeneralRe: How to write a "Hello World" app in C ... or this Pin
Richard MacCutchan8-Jun-21 23:01
mveRichard MacCutchan8-Jun-21 23:01 
GeneralRe: How to write a "Hello World" app in C ... Pin
CodeWraith9-Jun-21 0:14
CodeWraith9-Jun-21 0:14 
GeneralRe: How to write a "Hello World" app in C ... Pin
OriginalGriff9-Jun-21 0:22
mveOriginalGriff9-Jun-21 0:22 
GeneralRe: How to write a "Hello World" app in C ... Pin
CodeWraith9-Jun-21 0:31
CodeWraith9-Jun-21 0:31 
GeneralRe: How to write a "Hello World" app in C ... Pin
CPallini9-Jun-21 0:41
mveCPallini9-Jun-21 0:41 
GeneralRe: How to write a "Hello World" app in C ... Pin
Maximilien9-Jun-21 2:46
Maximilien9-Jun-21 2:46 
GeneralRe: How to write a "Hello World" app in C ... Pin
enhzflep10-Jun-21 1:57
enhzflep10-Jun-21 1:57 
LOL.. That's a ripper. Tricked my brain into trying to see SIRDS there for a moment, nice.

I entered a contest one time to print the capital of each of the US states along with the state name.

I messed-up since the binary has capital letters in it, which were disallowed.. Still a bit of a laff though.
68 3F 00 68 E8 01 68 4F 03 E8 1C 00 68 22 01 68 27 02 68 B3 03 E8 10 00     -   h?.hè.hO.è..h".h'.h³.è..
BE 83 05 C6 04 00 68 4F 03 68 B3 03 E8 62 00 C3 55 89 E5 81 C5 04 00 8B     -   ¾ƒ.Æ..hO.h³.èb.ÃU‰å.Å..‹
76 02 8B 7E 00 B6 05 30 DB AC B2 08 D0 D0 D0 D3 FE CA FE CE 75 1E 80 FB     -   v.‹~.¶.0Û¬².ÐÐÐÓþÊþÎu.€û
1A 75 05 B3 20 E9 0D 00 80 FB 1B 75 05 B3 2C E9 03 00 80 C3 61 88 1D 47     -   .u.³ é..€û.u.³,é..€Ãaˆ.G
B6 05 30 DB 08 D2 75 D4 FF 4E 04 75 CC 5D C2 06 00 53 B3 62 FE CB 88 DF     -   ¶.0Û.ÒuÔÿN.uÌ]Â..S³bþˈß
80 C7 19 38 D8 72 08 38 F8 77 04 B3 20 28 D8 5B C3 55 89 E5 81 C5 04 00     -   €Ç.8Ør.8øw.³ (Ø[ÃU‰å.Å..
8B 76 00 31 C0 88 C2 89 C1 AC A8 FF 74 46 80 FA 20 74 35 08 D2 74 31 3C     -   ‹v.1ÀˆÂ‰Á¬¨ÿtF€ú t5.Òt1<
2C 75 30 B4 0E CD 10 89 CB 01 DB 03 5E 02 8A 07 E8 B6 FF CD 10 43 8A 07     -   ,u0´.Í.‰Ë.Û.^.Š.è¶ÿÍ.CŠ.
E8 AE FF CD 10 B0 0D CD 10 B0 0A CD 10 C6 06 4C 03 00 30 D2 41 E9 C1 FF     -   è®ÿÍ.°.Í.°.Í.Æ.L..0ÒAéÁÿ
E8 96 FF B4 0E CD 10 88 C2 E9 B5 FF 5D C2 04 00 58 10 D7 1C 0B 64 C4 E4     -   è–ÿ´.Í.ˆÂéµÿ]Â..X.×..dÄä
0E 77 60 1B 82 AD AC 9B 5A 96 3A A0 90 DE 06 12 28 19 1A 7A CC 53 54 98     -   .w`.‚.¬›Z–: .Þ..(..zÌST˜
D0 29 A4 68 AC 8B 00 19 62 0E 86 49 0B 90 98 3B 62 93 30 1A 35 61 D1 04     -   Ð)¤h¬‹..b.†I..˜;b“0.5aÑ.
50 01 01 CA B5 5B 50 08 26 E6 EA 2E A1 89 B4 34 68 03 40 F7 2D 12 D8 9C     -   P..ʵ[P.&æê.¡‰´4h.@÷-.Øœ
BA 30 34 96 D8 E6 CC CE 61 23 8D 9C 8B 23 41 B1 91 B5 24 76 17 22 44 D8     -   º04–ØæÌÎa#.œ‹#A±‘µ$v."DØ
29 29 A1 BB 0B A5 37 37 60 58 40 DC 6E 60 5A C0 70 4A 44 26 E4 06 CC 1A     -   ))¡».¥77`X@Ün`ZÀpJD&ä.Ì.
29 36 D0 48 F5 42 D6 4D CE 24 6C DC DD A4 85 29 23 27 37 71 40 8E C7 34     -   )6ÐHõBÖMÎ$lÜݤ…)#'7q@ŽÇ4
7B 7A 09 18 93 67 04 62 89 06 91 36 C1 43 52 53 06 DF 17 55 03 23 44 4D     -   {z..“g.b‰.‘6ÁCRS.ß.U.#DM
8D D5 24 76 27 34 4E 88 F6 C7 36 6F 22 D0 48 EC E0 8C CA E8 8F 73 73 C8     -   .Õ$v'4NˆöÇ6o"ÐHìàŒÊè.ssÈ
A0 6E 40 43 67 A7 82 8B DA 68 D2 02 9B 5A 1A 27 2D BB 88 16 44 18 FB 60     -    n@Cg§‚‹ÚhÒ.›Z.'-»ˆ.D.û`
06 89 39 BB 72 F0 C7 A0 1B 79 DC 46 A2 FB 58 1B 24 34 DB 3B 9A E5 D1 74     -   .‰9»rðÇ .yÜF¢ûX.$4Û;šåÑt
DA 40 25 49 CD DC 9F 14 34 C5 41 16 3D 89 CB A3 02 80 6C 0D 68 1E E5 A2     -   Ú@%IÍÜŸ.4ÅA.=‰Ë£.€l.h.å¢
5B 11 C9 82 35 A4 DC 80 B9 E9 60 51 34 24 4F 1B 04 D6 06 CC 1B 0A 24 C0     -   [.É‚5¤Ü€¹é`Q4$O..Ö.Ì..$À
44 4A D9 62 06 A8 AE 8C F7 20 2C 8C DA D1 39 AC 9A 8B 84 AD 8C 92 D3 1C     -   DJÙb.¨®Œ÷ ,ŒÚÑ9¬š‹„.Œ’Ó.
86 92 5B 90 05 10 30 8D 9B B6 E5 2C 07 73 01 A1 22 78 D8 8E 08 AC 92 9B     -   †’[...0.›¶å,.s.¡"xØŽ.¬’›
9B B1 02 32 73 74 24 4F 1B                                                  -   ›±.2st$O.

It gives the output:
Baton Rouge,LA
Indianapolis,IN
Columbus,OH
Montgomery,AL
Helena,MT
Denver,CO
Boise,ID
Austin,TX
Boston,MA
Albany,NY
Tallahassee,FL
Santa Fe,NM
Nashville,TN
Trenton,NJ
Jefferson,MO
Richmond,VA
Pierre,SD
Harrisburg,PA
Augusta,ME
Providence,RI
Dover,DE
Concord,NH
Montpelier,VT
Hartford,CT
Topeka,KS
Saint Paul,MN
Juneau,AK
Lincoln,NE
Raleigh,NC
Madison,WI
Olympia,WA
Phoenix,AZ
Lansing,MI
Honolulu,HI
Jackson,MS
Springfield,IL
Columbia,SC
Annapolis,MD
Cheyenne,WY
Salt Lake City,UT
Atlanta,GA
Bismarck,ND
Frankfort,KY
Salem,OR
Little Rock,AR
Des Moines,IA
Sacramento,CA
Oklahoma City,OK
Charleston,WV
Carson City,NV

And comes from the source: (holy hell. What _was_ I thinking)
[section .text]
[bits 16]
[org 0x100]
entry_point:
    push    word 63                 ; no of bytes of packed data = (5/8) * unpacked_length    - rounded up tp nearest byte
    push    word states_packed
    push    word states_unpacked
    call    unpack_bytes

    push    word 290                ; no bytes of packed data
    push    word capitals_packed
    push    word capitals_unpacked
    call    unpack_bytes

    ; ensure there's a terminating null after the capitals
    mov     si, nullTerminator
    mov     [si], byte 0

    ;void outputStrings(char *cities, char *states)
    push    word states_unpacked
    push    word capitals_unpacked
    call    output_strings

;   int 0x20
    ret

;void unpack_states(char *unpackedDest, char *packedInput, int packed_length)
;unpack_capitals:
unpack_bytes:
    push    bp
    mov     bp, sp
    add     bp, 4

    mov     si, [bp + 2]        ; point to the packed input
    mov     di, [bp + 0]        ; point to the output buffer

    mov     dh, 5               ; number of bits remaining until we have a full output byte, ready to be translated from [0..25] --> [A..Z] (+65) or 26-->' ' or 27-->','
    xor     bl, bl              ; clear our output accumalator
.unpack_get_byte:
    lodsb
    mov     dl, 8           ; number of bits remaining in this packed byte before we need another one
.unpack_get_next_bit:
    rcl     al, 1           ; put most significant bit into carry flag
    rcl     bl, 1           ; and put it into the least significant bit of our accumalator
    dec     dl              ; 1 bit less before we need another packed byte
    dec     dh              ; 1 bit less until this output byte is done
    jnz     .checkInputBitsRemaining

.transform_output_byte:
    cmp     bl, 26          ; space is encoded as 26
    jne     .notSpace
    mov     bl, ' '
    jmp     .store_output_byte
.notSpace:
    cmp     bl, 27          ; comma is encoded as 27
    jne     .notComma
    mov     bl, ','
    jmp     .store_output_byte
.notComma:
.alphaChar:
    add     bl, 'a'         ; change from [0..25] to [A..Z]
.store_output_byte:
    mov     [di], bl        ; store it
    inc     di              ; point to the next output element
    mov     dh, 5           ; and reset the count of bits till we get here again
    xor     bl, bl
.checkInputBitsRemaining:
    or      dl,dl           ; see if we've emptied the packed byte yet
    jnz     .unpack_get_next_bit

    dec     word [bp + 4]       ; decrement the number of bytes of input remaining to be processed
    jnz     .unpack_get_byte    ; if we still have some, go back for more

.unpack_input_processed:    

    pop     bp
    ret     6

; input:
;       al = char
; outpt:
;       if al if an alpha char, ensures it is in range [capital-a .. capital-z]
toupper:
    push    bx
    mov     bl, 98
    dec     bl              ; bl = 'a'
    mov     bh, bl
    add     bh, 25          ; bh = 'z'
    cmp     al, bl          ;'a'
    jb      .toupperdone
    cmp     al, bh
    ja      .toupperdone
    mov     bl, 32
    sub     al, bl          ;'A' - 'a'      
.toupperdone:
    pop     bx
    ret

;void outputStrings(char *cities, char *states)
output_strings:
    push    bp
    mov     bp, sp
    add     bp, 4

    mov     si, [bp + 0]            ; si --> array of cities
    xor     ax, ax
;   mov     [lastChar], al          ; last printed char is undefined at this point - we'll use this to know if we're processing the first entry
    mov     dl, al
;   mov     [string_index], ax      ; zero the string_index too
    mov     cx, ax                  ; zero the string_index too
.getOutputChar:
    lodsb
    test    al, 0xff
    jz      .outputDone             ; if we've got a NULL, it's the string terminator so exit

;   cmp     byte [lastChar], ' '    ; if the last char was a space, we have to capitalize this one
    cmp     dl, ' '                 ; if the last char was a space, we have to capitalize this one
    je      .make_ucase

;   cmp     byte [lastChar], 0      
    or      dl, dl                  ; if this is 0, then it's the first char we've printed, therefore we know it should be capitalized
    jz      .make_ucase

    cmp     al, ','                 ; if this is a comma, the city is done, so print the comma then do the state and a crlf, finally, increment the string_index
    jne     .printChar

    mov     ah, 0xe                 ; code for print-char, teletype output
    int     0x10                    ; print the char held in al

;   mov     bx, [string_index]      
    mov     bx, cx;[string_index]
    add     bx,bx                   ; x2 since each state is 2 bytes long
    add     bx, [bp+2]              ; bx --> states_unpacked[string_index]
    mov     al, [bx]                ; get the first char of the state
    call    toupper                 ; upper case it
;   mov     ah, 0xe         ;not needed, still set from above
    int     0x10                    ; and print it
    inc     bx

    mov     al, [bx]                ; get the 2nd char of the state
    call    toupper                 ; uppercase it
;   mov     ah, 0xe         ;not needed, still set from above
    int     0x10                    ; and print it

    mov     al, 0x0d                ; print a CRLF
    int     0x10
    mov     al, 0x0a
    int     0x10

    mov     byte [lastChar], 0      ; zero this, so that the first letter of the new city will be capitalized, just like the first char in the string was
    xor     dl, dl                  ; zero this, so that the first letter of the new city will be capitalized, just like the first char in the string was

;   inc     word [string_index]     ; increment our index, ready for the next city's state
    inc     cx  ;word [string_index]        ; increment our index, ready for the next city's state
    jmp     .getOutputChar          ; go back and get the next char of the next city

.make_ucase:
    call    toupper

.printChar:
    mov     ah, 0xe
    int     0x10
;   mov     [lastChar], al
    mov     dl, al
    jmp     .getOutputChar          ; go back and get the next char of the next city

.outputDone:
    pop     bp
    ret     4                       ; return and clean-up the two vars from the stack

[section .data]

; 63 packed bytes, 100 unpacked (saved 37)
states_packed:
    db  01011000b, 00010000b, 11010111b, 00011100b, 00001011b, 01100100b, 11000100b, 11100100b
    db  00001110b, 01110111b, 01100000b, 00011011b, 10000010b, 10101101b, 10101100b, 10011011b
    db  01011010b, 10010110b, 00111010b, 10100000b, 10010000b, 11011110b, 00000110b, 00010010b
    db  00101000b, 00011001b, 00011010b, 01111010b, 11001100b, 01010011b, 01010100b, 10011000b
    db  11010000b, 00101001b, 10100100b, 01101000b, 10101100b, 10001011b, 00000000b, 00011001b
    db  01100010b, 00001110b, 10000110b, 01001001b, 00001011b, 10010000b, 10011000b, 00111011b
    db  01100010b, 10010011b, 00110000b, 00011010b, 00110101b, 01100001b, 11010001b, 00000100b
    db  01010000b, 00000001b, 00000001b, 11001010b, 10110101b, 01011011b, 01010000b

; 290 packed bytes, 463 unpacked (saved 173)
capitals_packed:
    db  00001000b, 00100110b, 11100110b, 11101010b, 00101110b, 10100001b, 10001001b, 10110100b, 00110100b, 01101000b, 00000011b, 01000000b, 11110111b, 00101101b
    db  00010010b, 11011000b, 10011100b, 10111010b, 00110000b, 00110100b, 10010110b, 11011000b, 11100110b, 11001100b, 11001110b, 01100001b, 00100011b, 10001101b
    db  10011100b, 10001011b, 00100011b, 01000001b, 10110001b, 10010001b, 10110101b, 00100100b, 01110110b, 00010111b, 00100010b, 01000100b, 11011000b, 00101001b
    db  00101001b, 10100001b, 10111011b, 00001011b, 10100101b, 00110111b, 00110111b, 01100000b, 01011000b, 01000000b, 11011100b, 01101110b, 01100000b, 01011010b
    db  11000000b, 01110000b, 01001010b, 01000100b, 00100110b, 11100100b, 00000110b, 11001100b, 00011010b, 00101001b, 00110110b, 11010000b, 01001000b, 11110101b
    db  01000010b, 11010110b, 01001101b, 11001110b, 00100100b, 01101100b, 11011100b, 11011101b, 10100100b, 10000101b, 00101001b, 00100011b, 00100111b, 00110111b
    db  01110001b, 01000000b, 10001110b, 11000111b, 00110100b, 01111011b, 01111010b, 00001001b, 00011000b, 10010011b, 01100111b, 00000100b, 01100010b, 10001001b
    db  00000110b, 10010001b, 00110110b, 11000001b, 01000011b, 01010010b, 01010011b, 00000110b, 11011111b, 00010111b, 01010101b, 00000011b, 00100011b, 01000100b
    db  01001101b, 10001101b, 11010101b, 00100100b, 01110110b, 00100111b, 00110100b, 01001110b, 10001000b, 11110110b, 11000111b, 00110110b, 01101111b, 00100010b
    db  11010000b, 01001000b, 11101100b, 11100000b, 10001100b, 11001010b, 11101000b, 10001111b, 01110011b, 01110011b, 11001000b, 10100000b, 01101110b, 01000000b
    db  01000011b, 01100111b, 10100111b, 10000010b, 10001011b, 11011010b, 01101000b, 11010010b, 00000010b, 10011011b, 01011010b, 00011010b, 00100111b, 00101101b
    db  10111011b, 10001000b, 00010110b, 01000100b, 00011000b, 11111011b, 01100000b, 00000110b, 10001001b, 00111001b, 10111011b, 01110010b, 11110000b, 11000111b
    db  10100000b, 00011011b, 01111001b, 11011100b, 01000110b, 10100010b, 11111011b, 01011000b, 00011011b, 00100100b, 00110100b, 11011011b, 00111011b, 10011010b
    db  11100101b, 11010001b, 01110100b, 11011010b, 01000000b, 00100101b, 01001001b, 11001101b, 11011100b, 10011111b, 00010100b, 00110100b, 11000101b, 01000001b
    db  00010110b, 00111101b, 10001001b, 11001011b, 10100011b, 00000010b, 10000000b, 01101100b, 00001101b, 01101000b, 00011110b, 11100101b, 10100010b, 01011011b
    db  00010001b, 11001001b, 10000010b, 00110101b, 10100100b, 11011100b, 10000000b, 10111001b, 11101001b, 01100000b, 01010001b, 00110100b, 00100100b, 01001111b
    db  00011011b, 00000100b, 11010110b, 00000110b, 11001100b, 00011011b, 00001010b, 00100100b, 11000000b, 01000100b, 01001010b, 11011001b, 01100010b, 00000110b
    db  10101000b, 10101110b, 10001100b, 11110111b, 00100000b, 00101100b, 10001100b, 11011010b, 11010001b, 00111001b, 10101100b, 10011010b, 10001011b, 10000100b
    db  10101101b, 10001100b, 10010010b, 11010011b, 00011100b, 10000110b, 10010010b, 01011011b, 10010000b, 00000101b, 00010000b, 00110000b, 10001101b, 10011011b
    db  10110110b, 11100101b, 00101100b, 00000111b, 01110011b, 00000001b, 10100001b, 00100010b, 01111000b, 11011000b, 10001110b, 00001000b, 10101100b, 10010010b
    db  10011011b, 10011011b, 10110001b, 00000010b, 00110010b, 01110011b, 01110100b, 00100100b, 01001111b, 00011011b

[section .bss]
lastChar        resb    1       ; last printed char - used to capitalize chars after a space (i.e the 2nd or third word of a city name)
string_index    resw    1       ; used to index into the array of states, which are each two bytes

states_unpacked         resb 100            ; 50 states, 2 bytes each
capitals_unpacked       resb 464
nullTerminator          resb   1

GeneralAre you startled easily? Pin
charlieg8-Jun-21 10:43
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GeneralRe: Are you startled easily? Pin
Cp-Coder8-Jun-21 11:13
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GeneralRe: Are you startled easily? Pin
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professionalDaniel Pfeffer8-Jun-21 16:35 
GeneralRe: Are you startled easily? Pin
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JokeRe: Are you startled easily? Pin
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GeneralRe: Are you startled easily? Pin
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GeneralRe: Are you startled easily? Pin
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NewsRansomware crooks having a bad day? Pin
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GeneralRe: Ransomware crooks having a bad day? Pin
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GeneralRe: Ransomware crooks having a bad day? Pin
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GeneralRe: Ransomware crooks having a bad day? Pin
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GeneralRe: Ransomware crooks having a bad day? Pin
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GeneralRe: Ransomware crooks having a bad day? Pin
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GeneralRe: Ransomware crooks having a bad day? Pin
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GeneralRe: Ransomware crooks having a bad day? Pin
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GeneralRe: Ransomware crooks having a bad day? Pin
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