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<1…24252627282930…34>
  • Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …

    ... screen
    LOOP LD HL,MSGWT
    CALL ... PRSTRNG
    LD HL,MSGFIR
    CALL PRSTRNG< ... a string from address in HL
    ;
    PRSTRNG ... LD A,(HL)
    BIT 7,A ... br /> RST $10
    INC HL
    JR PRSTRNG
    ...
    dbolli dbolli November 2012 Development
  • Compressors are available for Speccys ?Hi folks, although I was an wasn't strictly a speccy coder in the glory days (amstrad & amiga for the most part), I have secides to arse about with …

    ... ,25025
    25033 DEC HL
    25034 OR (HL)
    25035 JR ... ,25057
    25037 DEC HL
    25038 PUSH HL
    25039 LD ... H,A
    25044 INC HL
    25045 ADD HL,DE
    25046 ... LDDR
    25055 INC DE
    25056 POP HL
    25057 SBC ...
    LCD LCD November 2012 Development
  • Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…

    ... /> 3a 48 LD HL, (5c78)
    3d 64 INC HL
    3e 70 ... LD (5c78), HL
    41 ...
    Arjun Arjun December 2012 Emulators
  • calculator and sinusok, look at the Sysel's routine: [PHP]3 5b00 *s 4 5b00 tabsin = #7000 03 mksin 19.11.1995 Busy soft …

    ...
    inc e
    djnz loc_6011
    inc hl
    dec ... HL),D:INC H:LD (HL),E:INC H
    LD (HL),C:INC H:LD (HL ... /> LD DE,HL:INC E
    LD (HL),0:LDIR
    HL):INC H
    LD A,(HL),L,E:INC H:OR (HL)
    INC ...
    g0blinish g0blinish December 2012 Development
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... offset value (7 bits)
    inc hl
    sll e ; opcode ... of 8 bits
    inc hl
    rla
    ... value (7 bits)
    inc hl
    sll e ; opcode ...
    antoniovillena antoniovillena December 2012 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ) + offset value (7 bits)
    inc hl
    sll e ; opcode for ... group of 8 bits
    inc hl
    rla
    ret
    antoniovillena antoniovillena December 2012 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    64 bytes if longest match is
    antoniovillena antoniovillena December 2012 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ) + offset value (7 bits)
    inc hl
    defb $cb, $33 ; opcode ... group of 8 bits
    inc hl
    rla
    ret
    Einar Saukas Einar Saukas January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ) + offset value (7 bits)
    inc hl
    sll e ; opcode for ... group of 8 bits
    inc hl
    rla
    ret
    antoniovillena antoniovillena January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ) + offset value (7 bits)
    inc hl
    sll e ; opcode for ... group of 8 bits
    inc hl
    rla
    ret
    antoniovillena antoniovillena January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... + offset value (7 bits)
    inc hl
    defb $cb, $33 ; ... of 8 bits
    inc hl
    rla
    ... address (compressed data)
    inc hl
    jr main_loop
    ...
    Einar Saukas Einar Saukas January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ) + offset value (7 bits)
    inc hl
    defb $cb, $33 ; opcode ... group of 8 bits
    inc hl
    rla
    ret
    Einar Saukas Einar Saukas January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ) + offset value (7 bits)
    inc hl
    sll e ; opcode for ... group of 8 bits
    inc hl
    rla
    ret
    antoniovillena antoniovillena January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ) + offset value (7 bits)
    inc hl
    sll e ; opcode for ... group of 8 bits
    inc hl
    rla
    ret
    antoniovillena antoniovillena January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ) + offset value (7 bits)
    inc hl
    sll e ; opcode for ... group of 8 bits
    inc hl
    rla
    ret
    antoniovillena antoniovillena January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ) + offset value (7 bits)
    inc hl
    defb $cb, $33 ; opcode ... group of 8 bits
    inc hl
    rla
    ret
    Einar Saukas Einar Saukas January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ) + offset value (7 bits)
    inc hl
    sll e ; opcode for ... group of 8 bits
    inc hl
    rla
    ret
    antoniovillena antoniovillena January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ) + offset value (7 bits)
    inc hl
    sll e ; opcode for ... group of 8 bits
    inc hl
    rla
    ret
    Metalbrain Metalbrain January 2013 Brand new software
  • TRUE VIDEO, INV VIDEO!Am I the only one who thinks the two keys "TRUE VIDEO" and "INV VIDEO" on the 128/+2/+3 keyboards are pretty much useless, since embedding control co…

    ... /> out (c),a
    ld hl,$0351+$14
    ld c ... routine to execute
    inc hl
    ld b,(hl)
    push bc ...
    Battle Bunny Battle Bunny January 2013 Sinclair Miscellaneous
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ,$20
    add hl,bc
    inc de
    ld ... ,$c0
    add hl,bc
    inc de
    ld ... bytes)
    [code] ld hl,$c000
    ld de,$4000 ... ld (de),a
    inc hl
    inc e
    djnz draw_line
    inc d ; 4ts
    ...
    FrankT FrankT January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... screens.

    [code] ld hl,compscr
    ld de,$c000 ... /> ld (de),a
    inc hl
    inc d
    ld a,d ... /> loop: djnz loop1

    inc e
    dec c
    FrankT FrankT January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... a,(de)
    inc de
    ld (hl),a
    ld a ... ,b
    inc a
    inc hl
    ex de,hl
    ld b,3 ... the beginning:
    [CODE] ld hl,compscr
    ld de,rcs_buffer ...
    Einar Saukas Einar Saukas January 2013 Brand new software
  • RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…

    So how do you use RCS in practice? It's quite simple:
    [LIST]
    [*]First transform a regular ZX-Spectrum screen file (such as "Cobra.scr") into the RCS format (producing "Cobra.scr.rcs") using the command-line utility RCS;


    [*] ...
    Einar Saukas Einar Saukas January 2013 Development
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... ) + offset value (7 bits)
    inc hl
    defb $cb, $33 ; opcode ... group of 8 bits
    inc hl
    rla
    ret
    antoniovillena antoniovillena January 2013 Brand new software
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... offset value (7 bits)
    inc hl
    defb $cb, $33 ... call copy_byte
    pop hl
    inc hl
    jp pe, ... of 8 bits
    inc hl
    rla
    ...
    Einar Saukas Einar Saukas January 2013 Brand new software
  • RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…

    ... nz, length_value_loop
    inc bc ; adjust length
    hl ; store destination
    sbc hl, de ; HL = ... 8 bits
    inc hl
    rla
    antoniovillena antoniovillena January 2013 Development
  • RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…

    89 bytes (-1 byte):

    C cruncher code:
    [CODE]
    #define MAX_OFFSET 2160 /* range 1..2160 */
    ...
    void write_elias_gamma(int value) {
    int bits= 0, rvalue= 0;
    while ( value>1 )
    ++bits,
    antoniovillena antoniovillena January 2013 Development
  • Is this TZX OK?I'm in the middle of preserving a bunch of Danish MIAs and STPs. I'm slowly getting up to speed with MakeTZX. One tape is giving me some trouble. You…

    ... br /> 23786 LD (HL),000
    23788 INC HL
    23789 DJNZ ... br /> 23813 CP (HL)
    23814 INC HL
    23815 INC DE
    23816 ...
    23822 PUSH HL
    23823 LD HL,23821
    23826 ... br /> 23880 LD HL,23821
    23883 CP (HL)
    23884 ...
    Andrew Barker Andrew Barker January 2013 MIA/STP/SDP
  • ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …

    ... /> next_byte rl (hl)
    ret nz
    inc hl
    jr next_byte ... nz
    ld b, (hl)
    inc hl
    rl b
    ...
    antoniovillena antoniovillena January 2013 Brand new software
<1…24252627282930…34>

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