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  • SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]

    ... the two working together. The high quality output is great. I ... routines that map the higher res screen modes back to standard ...
    BloodBaz BloodBaz December 2012 Sinclair Miscellaneous
  • generating a pre-defined list in an un-defined sequenceI've decided to become a drunkard, to which end I've been drinking a whole bottle of beer in one day (whereas normally I'd make it last 2 or 3 days).…

    ... /> ld c,a ;BC=plot coordinates

    push hl ;[color ... )
    ADC HL,DE
    RES 7,H
    LD (SEED32 ...
    Battle Bunny Battle Bunny July 2013 Sinclair Basic
  • Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…

    ... ... as such SET opp and RES opp make good sence to ... diddled... Question is will the High byte stay the same or ... value from BC (useing just high byte diddling.)

    Lets ...
    wibble wibble August 2013 Development
  • Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…

    ... Register Pair BC (Remember low/high order)
    SET 0,C ... Pair BC (Remember low/high order)
    RES 0,C ; Re-set ... Register Pair BC (Remember low/high order)
    SET 0,C ... ; LD BC,0800
    CB99 ; RES 3,C
    C9 ; RETurn ...
    wibble wibble August 2013 Development
  • The Pros and Cons of "alternative" assembler syntaxContinuing from [URL]http://www.worldofspectrum.org/forums/showpost.php?p=720754&postcount=72[/URL] [QUOTE=u6c87;720754]But that wouldn't change if…

    ... limited platforms this might inform high level choices made.

    res). The model has allowed spectrum ... actual programming happens at a high level and makes use of ...
    Alcoholics Anonymous Alcoholics Anonymous September 2013 Development
  • SE BasicAfter 13 years of development I thought I'd run out of things to optimize, but it turns out I was wrong. However, I'm now running out of time to work…

    ... function: ~9
    [*]Default high-contrast white on black display ... [*]Inverted cursor for Timex hi-res.
    [*]IY register available in ... code-base for lo-res and hi-res ROMs.
    [*]STOP ... most existing programs in lo-res mode.
    [*]Supports some ...
    chev chev October 2013 Sinclair Basic
  • Wow! This is really a staggering achievement (programming, but still interesting!)The subject of good/clever programming came up in the SE BASIC topic, and I thought I'd mention this, but then that thread went back on topic (er, no…

    ... ), medium (640 x 200) and high (don't know what it ... 't use it anyway as high resolution only worked with a ... low res. had 16 colours, medium had 4 colours, and the high ...
    ewgf ewgf October 2013 Chit chat
  • Poor C64 speccy conversions[youtube]fNoqq9Vfc0g[/youtube] I ran across the above - and was struck by the graphics. At first I thought it was the speccy version, but then I rea…

    ... goes for hi-res gfx.[/quote]

    The high resolution mode ...
    TMR TMR October 2013 Games
  • Your Emulator of choice.Here at WOS there is a good active base of members. Most I would think have a real speccy somewhere, but, most must use An Emulator. Maybe there is…

    ... reading websites and forums, the high-DPI screen's a thing ... N7 fare with the higher res screen?

    D ...
    Dunny Dunny October 2013 Emulators
  • 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…

    ...
    inc l ; L addresses high byte of frames
    inc ... (hl) ; increment high byte

    org 0x0046 ... of err_sp in SP
    res 3, (iy + _flags) ; set 7 ...
    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…

    ... L
    ld a, c ; high
    and %00000011 ; byte
    res 6, (hl) ; reset bit 6 ... hl, flags ; address flags
    res 6, (hl) ; reset for string ...
    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…

    ... , s_no_to_str ; jump if so
    res 6, c ; clear bit 6 ... , s_push_po ; jump if so
    res 7, c ; clear bit 7 ... , s_endloop ; jump if so
    res 6, (hl) ; string?

    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…

    ... /> ld b, (hl) ; get high length pointer
    inc hl ... ; jump back with slice
    res 6, (iy + _flags) ; signal ... de ; unstack new start
    res 6, (iy + _flags) ; signal ... org 0x2ab2
    stk_sto_str:
    res 6, (iy + _flags) ; set ...
    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…

    ... /> ld (hl), b ; write high length byte
    dec hl ... d_run ; jump if not
    res 6, c ; signal handle strings ... /> ld (hl), b ; write high length byte
    pop bc ... br /> ld (hl), b ; write high byte
    dec hl ; back ...
    chev chev October 2013 Development
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ...

    .theme_t_states:equ 23 ; high, but loader can compensate
    high edge, 0 on low edge ... with colour number (7T)
    res 4,a ; kill EAR bit ...
    Alessandro Grussu Alessandro Grussu October 2013 Development
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... ,a ; A=0xFF on high edge, 0 on low edge ... colour number (7T)
    res 4,a ; kill EAR bit ... or 5 ; A=0xFF on high edge, 5 on low edge ... noise than we want
    res 4,a ; kill EAR ...
    stephenw32768 stephenw32768 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…

    ... /> org 0x1f4f
    pause_end:
    res 5, (iy + _flags) ; signal no ... /> break_key:
    ld a, 0x7f ; high byte of I/O address ... not
    ld a, 0xfe ; high byte of I/O address ...
    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…

    ... a ; set scroll count
    res 0, (iy + _vdu_flag) ; signal ... class_1 ; get variable address
    res 7, (iy + _flagx) ; ... hl) ; signal INPUT mode
    res 6, (hl) ; signal string ...
    inc hl ; high byte of output routine
    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…

    ... y
    and %11111000 ; preserve high five bits
    xor b ... a ; write it back
    res 5, d ; restore pointer to ... a ; write it back
    res 5, d ; restore pointer to ... a ; write it back
    res 5, d ; restore pointer to ...
    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 /> ld d, e ; set high byte of top of RAM ... palette and clear screen
    res 5, (iy + _vdu_flag) ; lower ... ) ; error number to A
    res 5, (iy + _flags) ; signal ... /> org 0x1615
    chan_flag:
    res 4, (iy + _flags2) ; signal using ...
    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…

    ... cl_line ; clear lower screen
    res 0, (iy + _vdu_flag) ; ... org 0x1813
    auto_l_6:
    res 4, (iy + _vdu_flag) ; signal ... :
    ld a, (hl) ; high byte of addressed number to ... :
    inc hl ; skip high byte
    ld c, ( ...
    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…

    ... flags ; get flags
    res 0, (hl) ; possible leading ... de, hl ; put correct high-address for character
    dec ...
    chev chev November 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…

    ... ld h, 0 ; zero high byte
    ex (sp ... flags ; address flags
    res 5, (hl) ; signal ...
    chev chev November 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…

    ... (last_k) ; code to A
    res 5, (iy + _flags) ; signal ... /> and %00000111 ; discard high five bits
    ld c ...
    chev chev 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…

    ... /> I can give you a high level overview that will put ... relative pixel and/or character coordinates. Each move function can also ...
    Alcoholics Anonymous Alcoholics Anonymous November 2013 Development
  • ****ing Awesome Spectrum Engine (FASE)This is a new engine (sprites, tiles, map) for all ZX Spectrum machines. The engine set ups a runtime enviroment that leave between 24K and 30K byt…

    ... )
    5c40-5c4f bullet coordinates (not implemented yet)
    ... 8000-stak main program in high level language
    stak ... )
    5c40-5c4f bullet coordinates (not implemented yet)
    ... 8000-stak main program in high level language
    stak ...
    antoniovillena antoniovillena January 2014 Brand new software
  • Deterministic random number generatorI'm looking for a random number generator in assembly which, given a seed, the generated sequence is always the same. You change the seed, you get a …

    Patrik's XOR generator is a good one but it only generates 8-bit numbers (again a plus if that's all you want!). If you want random numbers larger than 8-bit you have to call the function several times and piece together the results, which degrades the ...
    Alcoholics Anonymous Alcoholics Anonymous February 2014 Development
  • Tile routinesHi all, Please does anyone have any examples of tile routines in pure asm to set up maptile screens. I would like to try and understand them and ti…

    ... getting the screen location from coordinates.
    get_screen_location2:
    ld a ... h,a ; this is our high byte.
    ld a, b ...
    polomint polomint March 2014 Development
  • UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…

    ... only have to POKE the high byte of the system variable ... 's screen. (Though those hi-res games are using a similar ...
    joefish joefish June 2014 Sinclair Basic
  • I wonder what this is?Just having a browse on ebay and came across [URL="http://www.ebay.co.uk/itm/191216974918"]this[/URL], I wonder what its for?

    ... :

    "For producing extra-high resolution graphics for the ZX81 ... the display - and HI/LO RES screens can be SAVEd, LOADed ...
    balford balford June 2014 Hardware
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