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<1…891011121314…34>
  • Compiler conventions for passing args/return valuesI've been mulling over this for a while, but I can't spot it covered anywhere. There are various methods for passing args and return values between …

    ... - you are returning "true" or "false". If you compute the bool return ... , stdio_error_einval_zc ; no

    or a ; 0 base is no good too ... /> ld d,b

    xor a ; end of digits marked ...
    Alcoholics Anonymous Alcoholics Anonymous September 2013 Development
  • GAC Tutorial Started!Hi all. I have a Youtube channel where I play old games and such. I also do a few programming tutorials. I have recently added a Graphic Adventure Cr…

    ... are carrying "
    240 "What now?..."
    241 "You can't ...

    IF ((VERB 12) and (no1 > 0) and (no1 < ... (no1 > 0) ) mess 138 wait end

    IF (VERB 17 ... do things here
    IF ((VERB 18)or(verb 14)) mess 139 ...
    Timmy Timmy September 2013 Sinclair Miscellaneous
  • US Timex-Sinclair 2068 in EuropeWhilst in the States, I convinced a colleague to bid on a Timex-Sinclair 2068. We won the auction with a price much better than in Europe. Next time …

    ... crash with the Spectrum ROM now present, hopefully causing the program ... counter to pass through address 0, and the machine boots up ... Timex cartridges. If you have a copy of pinball or whatever on ... LROS was meant to augment or replace the operating system. You ...
    Alcoholics Anonymous Alcoholics Anonymous October 2013 Hardware
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... ret nc ; return if no key or shift
    ld ... ret nz ; return if not
    xor %00100000 ; toggle bit ...
    k_digit:
    cp '0' ; digit, return, space, shift ... k_look_up ; jump if shift
    ld hl, kt_numsym - '0' ; else ...
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... /> jr z, sound_1 ; jump if so
    call fp_to_a ; ... into
    rrca ; place
    or %00001000 ; MIC off
    < ... 10 t-state jump
    xor %00010000 ; toggle bit 4< ... 0x98, 0x1f, 0xf5 ; mantissa (0.0577622606)
    fmul ; d, ...
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... call check_end ; next statement if checking syntax
    call ... br /> ld (ix + 0), 0 ; set type 0
    scf ; set ... 0x0767
    ld_look_h:
    xor a ; signal header
    ... SCREEN$ or CODE?
    jr nz, report_r ; error if so
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... c ; twos complement
    xor c ; if negative
    ld (hl), ... nine digits
    xor a ; LD A, 0
    rld ; ... '
    ld l, 0 ; LD L', 0
    exx ; main ... stack count and result (C or C')
    exx ; switch ...
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... br /> jr nz, sv_close ; jump if so
    cp ')' ; closing ... br /> jr z, sl_second ; jump if so
    cp ')' ; closing ... ?
    ret z ; return if so
    call hl_equ_hl_x_de ; ...
    xor (hl) ; A is 0 for short or 192 for ...
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... nz, sec_plus ; jump if not null
    or c ; both null?
    xor (iy + _flags) ; test bit 6 ... x' - 0.5, 0.5
    ; y2, 2 * x' - 0.5, 0.5
    0)
    fst 0 ; mem-0 = test result
    ...
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... 48K machine or greater
    xor a ; A = 0
    ... z, main_9 ; immediate jump if successful
    cp STOP_statement + ... set CONTINUE to next statement if so
    cp BREAK_into_program ... /> ret z ; return if so
    cp STOP_statement ...
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... jr nz, auto_l_5 ; jump if so
    xor e ; current line printed ... ld a, c ; test
    or b ; for zero
    jr ... out_line:
    ld e, 0 ; LD DE, 0
    rl e ; E ... /> ld a, e ; space or 255
    and a ; test ...
    chev chev October 2013 Development
  • SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…

    ... nz ; return if no match
    ld c, 0 ; BC = 0

    jr z, renum_line_4 ; jump if so
    or %00100000 ; make lower case ... 0x3bbb
    insert_dgt:
    xor a ; LD A, 0

    org ...
    chev chev October 2013 Development
  • Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…

    ...

    struct sp1_Rect cr = {0, 0, 32, 24}; // rectangle covering the full ... screen area managed by sp1 now

    // Create Ten Masked ... );
    sp1_AddColSpr(s, SP1_DRAW_MASK2RB, 0, 0, i);
    if (i>7)
    slenkar slenkar November 2013 Development
  • Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…

    ...
    struct sp1_Rect cr = {0, 0, 32, 24}; // rectangle covering the full ... sp1_AddColSpr(s, SP1_DRAW_MASK2RB, 0, 0, i);
    if (i>7)
    } // draw screen now


    } // ...
    slenkar slenkar November 2013 Development
  • Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…

    ...
    struct sp1_Rect cr = {0, 0, 32, 24}; // rectangle covering the full ... sp1_AddColSpr(s, SP1_DRAW_MASK2RB, 0, 0, i);
    if (i>7)
    } // draw screen now


    } // ...
    slenkar slenkar November 2013 Development
  • Collision Detection in SP1Hi, Does anyone have a well-documented example of using collision detection in spritelib. I've search WoS and Z88DK forums but no joy. Something wi…

    ...
    struct sp1_Rect cr = {0, 0, 32, 24}; // rectangle covering the full ... sp1_AddColSpr(s, SP1_DRAW_MASK2RB, 0, 0, i);
    if (i>7)
    } // draw screen now


    } // ...
    slenkar slenkar November 2013 Development
  • What's on your saucer?Thanks go out to frobush and zx1 for inspiring* this WoSser to create a yet another excellent WoS thread. Lunch 10 minutes ago. [IMG]http://i300.ph…

    ... /> Well munching this lot right now, it's nice! :D[/QUOTE ... would be excellent

    If:-

    Sauce = hp
    0/5 ?
    Or maybe 1/5 at ...
    murtceps murtceps December 2013 Chit chat
  • HD TV recommendations please.We think our 40" HD telly is on it's way out. There have been a few marks on the picture for a while but it's slowly getting worse. [URL]http://sdr…

    ... the sound would turn off if it all went quiet and ... often miss the first 2 or 3 words of a line ... loaded :-(

    I now have a 32" 3D telly (I can ... menus. It get's annoying if you switch over to watch ...
    Bermondsey Bob Bermondsey Bob December 2013 Chit chat
  • Please explain how a Kempston interface circuit works.Can someone help me understand how a Kempston joystick interface works, as I want to design and build my own as an experiment. I understand switches…

    ... seen IN 31 return 0, not 32, when idle. Or are these, as ... D7? Do they go to 0?

    And could that ... /> Come to think of it, if the actual buffer chip also ... any old Kempston interface, good or bad, could have its A5 ...
    joefish joefish January 2014 Hardware
  • Please explain how a Kempston interface circuit works.Can someone help me understand how a Kempston joystick interface works, as I want to design and build my own as an experiment. I understand switches…

    ... IN 31 return 0, not 32, when idle. Or are these, as ... input from the joystick. If you want, I can ... full decoding...[/QUOTE] :???: If a buffer chip has two ... .

    Or add a OR gate chip, which can ... joystick...[/QUOTE]Yes. However, if you want a range ...
    1024MAK 1024MAK January 2014 Hardware
  • really dumb questionbut can I use the following line to create a udg and if so how do I call it or use it via the graphics mode? Do I need to READ something somewhere? …

    ... used the CLEAR keyword correctly or if I even have to use ... ,0,28,162,64,128,0,32,192,0,-1
    12 DATA14,17,32,32 ... ,65,46,17,40,199,0,192,32,0,128,64,162,28 ... )
    21 READ c:IF c>=0 THEN POKE a+b ... :GO TO 21
    22 IF c=-1 THEN LET a ...
    carlsson carlsson January 2014 Sinclair Basic
  • A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…

    ... either post it here or send me an email ... :

    ROWREPT = 0
    N=0
    dup TOTAL_ROWS
    ld sp, 22562+ROWREPT*32+19 ; reference columns 19 and ... +8
    IF N=128 then N=0 ENDIF
    ...
    DenisGrachev DenisGrachev January 2014 Brand new software
  • Animated attribute revealA new challenge to solve next. I would like to create an animated attribute reveal in machine code by having my 768 byte attributes held in ram whic…

    ... & 10 (E)
    xor e
    and %00000001 ;mask ... always bring in a 0 as OR resets Carry
    ... jr nc,SKIPDE ;skip if beyond attributes area (>=$ ... ld a,b
    or c
    jr nz ...
    Battle Bunny Battle Bunny February 2014 Development
  • Animated attribute revealA new challenge to solve next. I would like to create an animated attribute reveal in machine code by having my 768 byte attributes held in ram whic…

    ... amp; 10 (E)
    xor e
    rra
    ... amp; 12 (E)
    xor e
    rra ;align ... amp; 13 (E)
    xor e
    and %00000001 ; ... always bring in a 0 as OR resets Carry
    ...
    Battle Bunny Battle Bunny February 2014 Development
  • Python script to scrape Amazon.com book reviewsI've been meaning to read the Gollancz Fantasy Masterworks (roughly 40 books) and Sci-Fi Masterworks (roughly 100+ books) lists for a while now, but …

    ... the Dark Tim Powers (32, 12, 3, 3, 0, 223)
    Slow ... , 2, 2, 1, 128)
    Now Wait for Last Year Philip ... Gene Wolfe (0, , , , , )
    Elric Michael Moorcock (0, , , , , )
    Gloriana or the Unfulfill ...
    BigBadMick BigBadMick April 2014 Chit chat
  • Edge Connector InformationHi Everyone, Hope I'm posting in the correct forum. I've recently been playing with an Arduino and got to thinking it would be fab if I could do so…

    ... to select which memory location or input/output interface to communicate ... ). But go to the logic 0 level to signal to the ... 's output pins.

    Now if all you want to do ... a driver, or buffer. Or you could use transistor(s). Now depending on ...
    1024MAK 1024MAK April 2014 Hardware
  • Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…

    ... IC23 is a 74LS32 quad OR gate chip. It is ... " 32k RAM is one or more of the DRAM chips ... br /> This should print 0

    Now enter
    POKE ... results here :)

    If all these tests pass, try ... the fault to just one or two chips.

    ...
    1024MAK 1024MAK May 2014 Hardware
  • Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…

    ... IC23 is a 74LS32 quad OR gate chip. It is ... upper" 32k RAM is one or more of the DRAM chips ... br /> This should print 0

    Now enter
    POKE ... results here :)

    If all these tests pass, try ... the fault to just one or two chips.

    ...
    Brian Brian May 2014 Hardware
  • eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …

    ... br />
    ...

    Now let's use 560 ohm ... ohm.

    The current now is: I = 12 / (180 + ... BLANKING pin, which now works out at 0.818V.
    < ... to make such a board if there is sufficient demand. ... shifted to the left or worse can be unstable ...
    Fruitcake Fruitcake May 2014 Hardware
  • Beautiful codeSome people see beauty or something sublime in maths formulas and equations, can anyone suggest examples of beautiful or sublime programming?

    ... argument X of SIN X or COS X into a value ... /(2*Pl ( + 0.5), where Y is greater than, or equal to ... returns with: V=4*Y if -1
    chev chev May 2014 Development
<1…891011121314…34>

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