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<1…23242526272829…34>
  • Image 2 spectrumHi. This is my take on the "converting rgb images to spectrum". (or well, second take, first was a photoshop filter..) [img]https://dl.dropboxu…

    2.2 out:
    - still some npot fixes, hopefully have them all now
    - noise default set to 0.1 (instead of 0, which does nothing)
    - added quantize modifier
    Sol_HSA Sol_HSA December 2015 Announcements
  • Compression comparisonsI did some comparisons of different compression methods. To make this relevant to zx spectrum, I first gathered a corpus of relevant data: 6660 .TAP …

    ... Z is duration of bit "0", W is duration of bit ... 8 bits contain more "1"s than "0"s, then invert all ... , and 9th bit should be "1". In this case, average byte ... Z, the result is only 0.7% better than original.
    1.7% better than original.
    Einar Saukas Einar Saukas January 2016 Development
  • Compression comparisonsI did some comparisons of different compression methods. To make this relevant to zx spectrum, I first gathered a corpus of relevant data: 6660 .TAP …

    ... 8 bits contain more "1"s than "0"s, then invert all ... thinking... what if instead of 1 fixed extra bit, we only ... on the number of 1 bits: for 0-2, we add an ... , if we have 0-2 bits set to 1, read an extra ... level it would be already 1.85% better than the original ...
    Metalbrain Metalbrain January 2016 Development
  • Problem with BC corrupting after DJNZJust for fun, I'm messing around trying to get the level maps from Lemmings to display on the screen with machine code. It's been ages since I did an…

    ... ,49999
    ld de,1
    ld a,0
    scf

    SAVEIT LD A, 0
    LD IX, 49999
    LD DE, 1
    CALL 1218
    LD ... /> RET

    SLN DEFB 0
    [/code]

    Includes ...
    mulder mulder January 2016 Development
  • Compression comparisonsI did some comparisons of different compression methods. To make this relevant to zx spectrum, I first gathered a corpus of relevant data: 6660 .TAP …

    ... ... what if instead of 1 fixed extra bit, we ... on the number of 1 bits: for 0-2, we add ... if we have 0-2 bits set to 1, read an ... it would be already 1.85% better than the ... again, the result is 1.855% better than original, ... same number of "0"s and "1"s. In this ...
    Einar Saukas Einar Saukas January 2016 Development
  • 128K programmingDoes anyone know any good resources on assembly programming for the 128? All I'm after is an "idiot's-getting-started-guide" on how to utilise the…

    ... located

    ld (hl),0

    ldir
    ... switches to ROM bank 1
    ; leaving screen 0 visible.
    ; ... sets bit 4 making screen 1 visible instead
    ; leaving ...
    Mysterion Mysterion February 2016 Development
  • Are turbo loaders worth it?I found turbo loaders fascinating and I've spent quite some time disassembling and trying different types, and they work great when I load the games …

    ... -like scheme - i.e. 1's and 0's represented by whole ...
    Hikaru Hikaru March 2016 Development
  • TommyGun updatehttps://drive.google.com/file/d/0BwXFKYO5i1IlN2U4MUtrRVZZWUE/view?usp=sharing Hi, I have updated my TommyGun application and since we can't uplo…

    ... .com/s/8jqvnej3g9cfaby/TommyGun%201.1.exe?dl=0"]Dropbox[/url]
    Bedazzle Bedazzle March 2016 Development
  • Harlequin Rev GI have just got all the bits to build an Harlequin Rev G system and I went for a red solder mask board. I have fitted the 3 surface mount components…

    1-0.30
    2-4.69< ... -1.383-386
    13-1.387
    14-0.32
    15-1 ... .525
    16-1.471
    17-1.538
    18-1.552
    19-1.467-1 ...
    caver99 caver99 March 2016 Hardware
  • Competition time - design a WoS logoHello, all.. As part of the redesign, we would like to have new logos for use in Social Media/links and also in the forum/site headers. The spe…

    [img]https://dl.dropboxusercontent.com/s/y81scnzijcgbudl/Specbutton2-3-4-5-6-7-8.png?dl=0[/img]
    [img]https://dl.dropboxusercontent.com/s/h1wuxkwlif04b2a/Specbutton2-3-4-5-6-7-8-9-1.png?dl=0[/img]
    matalog matalog April 2016 Announcements
  • Let's copy buffers!Figured I'd do some double buffered graphics, so I can render for several frames before displaying stuff. Yes, I mean on a 48k speccy, so no 128k spe…

    ... c,.lp0
    .savesp=$+1
    ld sp,0
    ret[/code]
    Hikaru Hikaru April 2016 Development
  • Basic BASIC help needed RNDHi all, I have recently re-discovered an old program I wrote in the early 90s which would do generate random lottery numbers. I know little now, an…

    ... /> [code]
    10 RANDOMIZE 1:LET A=0
    20 FOR I ... =0 TO 65535
    30 LET ... =B
    40 PRINT AT 0,0;I
    50 NEXT i ... 'A*49'INT (A*49)'1+INT (A*49)
    [/code ...
    Mad Fritz Mad Fritz May 2016 Sinclair Basic
  • 140 characters Basic game contestHey there, I've announced a new micro contest on my blog (in Czech language only). However, it might be interesting also for the non-Czech/Slovak …

    ... the criteria.

    1 LET B=0
    2 PRINT AT ... 0,B;"*"
    3 LET B= ... "
    6 PRINT AT 21,0: PRINT'
    8 GOTO 2 ...
    daveysludge daveysludge June 2016 Sinclair Basic
  • 140 characters Basic game contestHey there, I've announced a new micro contest on my blog (in Czech language only). However, it might be interesting also for the non-Czech/Slovak …

    ... the criteria.

    1 LET B=0
    2 PRINT AT ... br /> 6 PRINT AT 21,0: PRINT'
    8 GOTO ... 23692 can be poked with 0). If you collide with ... statement.

    [code]1 LET B=0
    2 PRINT AT ... 7")-(INKEY$="6"): POKE 23692,0: PRINT AT 20,RND* ...
    leespoons leespoons June 2016 Sinclair Basic
  • New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…

    ... between those halves (POKE 0,1 or POKE 0,0) or switched back to ... BASIC (POKE 0,128) and after that it ...
    Shaos1973 Shaos1973 June 2016 Hardware
  • Character Based SpritesHi, I'm working through Jonathan's excellent guide to writing games, and have mastered the animation of single UDGs. Before or move onto Pixel…

    ... , 1, 240, 1, 0, 0, 248
    defb 3, 0, 0, 248, 1, 0, 0, 248, 0, 0, 0, 248, 0, 0, 0, 252, 0, 0, 1, 252, 0, 0, 1 ...
    defb 254, 0, 0, 3, 254, daveysludge daveysludge July 2016 Development
  • New Game - Cap'n Rescue: ReprisalHello, I'd just like to announce my new game Cap'n Rescue: Reprisal for the ZX Spectrum is almost complete. This is the third game in the series…

    ... levels, like (1.0, 1.5, 2.0, 2.5, 3.0, 3.5, etc ...
    RMartins RMartins July 2016 Brand new software
  • New Game - Cap'n Rescue: ReprisalHello, I'd just like to announce my new game Cap'n Rescue: Reprisal for the ZX Spectrum is almost complete. This is the third game in the series…

    ... levels, like (1.0, 1.5, 2.0, 2.5, 3.0, 3.5, etc ...
    LoadingScreech LoadingScreech July 2016 Brand new software
  • Help needed with MIA software with custom (?) loaderHi, I've got into my hands recently a bunch of Polish educational software which are unknown MIA on WOS. I believe they are protected with some…

    ... ; 0+
    0x0357 ; 0 defining a initial 0 bit
    0x08CA ; 1+
    0x06AE ; 1 ... or a initial 1 bit
    0x0357 ; 0
    0x0357 ; 0 ... defining a further 0 bit
    0x06AE ; 1
    0x06AE ; 1 ...
    lfaria lfaria August 2016 MIA/STP/SDP
  • Recreated ZX Spectrum - something positive for a changeI've spend the last couple of hours mashing rubber keys and playing various Spectrum classics on a 42" TV, wirelessly. Despite the bad press that …

    ... pressed. For example, pressing the '1' key down makes Linux see ... an 'a' character. Releasing the '1' key produces a 'b' character ... logically - pressing '1' gives you a '1', etc. CapsShift-0 gives you a ...
    thricenightly thricenightly August 2016 Hardware
  • Spectrum +2A floating bus portHi As I discovered in the past, Spectrum +2A (and probably +3) do have floating bus port. But it is not shown on all unused ports, only on some po…

    ... , returns more 57's than 1's, wtf?). Was this ever ... to be represented by 1's (ex-0's?), which isn't ...
    Hikaru Hikaru August 2016 Hardware
  • Brightness level of non-bright attributes on classic ZX 48Does anybody know what was a brightness level of non-bright attributes on classic ZX 48? Was it the same on 128, +2 and +3? I can see on wikipedia a…

    ... the third line (sRGB [0,1]) - for example 0.7
    »Click the ...

    0.60 » 204
    0.70 » 218
    0.85 » 238 ...
    4throck 4throck September 2016 Hardware
  • ZX Spectrum video waveformsAll work for this post was done on a ZX Spectrum issue 1 board (16k bytes of RAM only). This was what the Spectrum displayed on the TV screen: [i…

    ... values (Y=0.299R'+0.587G'+0.114B')[/b]
    0 0 0
    1 2 255 ...
    6 8 255
    204 0 0
    255 1 0
    210 0 210
    255 ... 8 255
    0 204 0
    0 ...
    4throck 4throck September 2016 Hardware
  • Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…

    ... the three bytes [b]33, 0, 64[/b]

    [b ... 'LD HL,....' and 0 and 64 combine ([b]0[/b] + 256*[b ... +1: LET DE=DE+1:
    LET BC=BC-1: IF BC>0 ... until BC counts down to 0. That whole line is the ...
    joefish joefish September 2016 Sinclair Basic
  • Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …

    ... ]
    9991 LET here=1: LET limit=0: LET free=65536-USR ... j$/2): LET j$(here)="0":
    9994 LET j$(here ... +1 TO here+here)=j$(TO ...
    Battle Bunny Battle Bunny October 2016 Sinclair Basic
  • Graphics program in AssemblyHi so I think I'm getting the hang of this so I've done this program. It writes directly to the screen. I'm using ZX Spin. [code] LD HL,16384 LD B,…

    ... are bits which may be 0 or 1. Many instructions test these ... flag[/b] to 1 if B=0 and to 0 when B0.
    So to check if BC=0 and correctly set zero flag ...
    Ralf Ralf November 2016 Assembler
<1…23242526272829…34>

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