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<1…23242526272829…34>
  • Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…

    ... a:
    DATA 0,256, 0,176, 1,256-a(1), 1,a(2)+1
    909 ...
    sub (ix+3)
    ld (ix+5),a ;YS-HS
    ld a,h
    or l
    jp nz,FOR_P ...
    Battle Bunny Battle Bunny April 2016 Sinclair Basic
  • Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…

    ... structure...
    LD A,5
    LD (IX+0),A
    LD ... EQU 0
    ADDFUNC_B EQU 1
    ADDFUNC_RESULT EQU 2
    ADDFUNC_Size EQU 3 ... ADDFUNC_Size,IX
    LD A,5
    LD (IX+ADDFUNC_A),A ... if you were passing in (or out) more values than you ...
    Jmk Jmk April 2016 Development
  • A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…

    ... ,88,1,1}, {0,128,120,2,0}, {0,128,56,2,0}, {0,96,88,2,0}, {0,96,120,2,0},
    {0 ... ,96,56,1,1}, {0,160,88,2,0}, {0,160,120,2,0}, {
    Alcoholics Anonymous Alcoholics Anonymous June 2016 Development
  • ZX Spectrum CartridgesI have been thinking of "cloning" ZX Cartridges for a while (case, board and silicon skirt), to be able to make new releases or replace damaged cartr…

    ... +1, X+1, ADDR+2, A, ADDR+3, A+1, ADDR+4, A, ADDR+5, A+1 ... (1T), instead of 1.5T (fetch) or 2.5T (read or write).

    [code]LD HL,0
    LD A, bankNumber
    1, X+1, ADDR+2, A, ADDR+3, A+1, ADDR+4, A, ADDR+5, A+1 ...
    RMartins RMartins 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…

    ...
    and 3
    or 88
    ... and 224
    or e
    ld ... 0, 224, 11, 2, 2, 224, 37, 2, 2, 224, 19, 0, 0
    defb 224, 5, 128, 0 ... 3, 0, 0, 248, 1, 0, 0, 248, 0, 0, 0, 248, 0,
    daveysludge daveysludge July 2016 Development
  • 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…

    ... 0x13 ; Sync Pulses
    0x02 ; 2
    0x029B ; Sync1 Length
    0+
    0x0357 ; 0 defining a initial 0 bit
    0x08CA ; 1+
    0x06AE ; 1 or ... 48 pulses defining the last 3 bytes
    The total ... custom block will use 5(Bl12)+6(Bl13)+482by* ...
    lfaria lfaria August 2016 MIA/STP/SDP
  • 48K Issue 2 Spectrum showing exactly 16KI've acquired an issue 2 and it quickly became clear that only 16K of memory is available. I've read that some early 48K Spectrums with malfunctionin…

    ... (decoding error, short circuit or crosstalk) on another data line ... lines are shorted together or are being affected by ... bit 7 6 5 4 3 2 1 0
    170 dec = 1 0 1 0 1 0 1 0 binary[/code]
    or me, or another source confirms it, ...
    1024MAK 1024MAK August 2016 Hardware
  • Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …

    ... 2.2

    Version 2.2 retains all the features of 2.1 ... USR 0
    3) CLEAR command ... disk or ram ... br /> 5) T channel ...
    harriusherbartio harriusherbartio September 2016 Hardware
  • Proportional fontsI've been doing some proportional font drawing, purely on C level at the moment, but it's orders of magnitude slower than I'd want it to be. It's sti…

    ... do nothing in the lucky 0 case).

    ... probably useful when shifting 2 or more positions because of ... Shift right by 3, 2, 1 instead of left by 5, 6, 7 ... bits. Like when a 5 pixel-wide character needs ... right shifted by 2. Byte wide shifts (or RRC's) ...
    gp2000 gp2000 October 2016 Development
  • Proportional fontsI've been doing some proportional font drawing, purely on C level at the moment, but it's orders of magnitude slower than I'd want it to be. It's sti…

    ... data for the character set or font (as they're known ... ,64h,4ch,b8h;-2* ;0
    db 40h,fch ;1
    db ... /> db 44h,54h,54h,a8h;-2* ;3
    db 18h,28h,7ch ... db 74h,74h,74h,c8h ;5
    db 38h,54h,54h ...
    jamorski jamorski October 2016 Development
  • Akalabeth gamei found now that someone ported an ansi-basic game (coded in 1979?) to msx-basic - what about a zx-spectrum basic version of it? ;) https://plus.goo…

    ... />
    [code]100 BORDER 0: PAPER 0: INK 7: CLS
    110 ... REM
    140 PRINT AT 0,0;"Please wait, building string"
    240 REM F=1 - DRAW, X=+ve, Y=+ve ...
    250 REM F=2 - DRAW, X=-ve, Y=+ve ...
    260 REM F=3 - DRAW, X=+ve, Y=- ...
    Paddy Coleman Paddy Coleman October 2016 Sinclair Basic
  • Akalabeth gamei found now that someone ported an ansi-basic game (coded in 1979?) to msx-basic - what about a zx-spectrum basic version of it? ;) https://plus.goo…

    ... REM
    140 PRINT AT 0,0;"Please wait, building string"
    240 REM F=1 - DRAW, X=+ve, Y=+ve ...
    250 REM F=2 - DRAW, X=-ve
    260 ... REM F=3 - DRAW, Y=-ve
    270 ... REM
    290 LET F=1
    300 IF A$="P ...
    Paddy Coleman Paddy Coleman October 2016 Sinclair Basic
  • Best place to start learning assembly on WOS ?So I'm pretty new at this forum but not the Speccy so my BASIC is pretty good. I can see lots of resources on WOS for doing machine code/assembly but…

    ... only be a number between 0 and 255 so why complicate ... that numbers always appear as 2- or 4-digit numbers, depending on ... you refer to byte values or word values (two bytes is ... , from 1 to 3 digits for bytes, and from 1 to 5 digits for ...
    The_Bert The_Bert November 2016 Development
  • Best place to start learning assembly on WOS ?So I'm pretty new at this forum but not the Speccy so my BASIC is pretty good. I can see lots of resources on WOS for doing machine code/assembly but…

    ... only be a number between 0 and 255 so why ... that numbers always appear as 2- or 4-digit numbers, depending ... from 1 to 3 digits for bytes, and from 1 to 5 digits ... only be a number between 0 and 255 so why ... ., make more sense in hex (or binary) IMO.

    chriswyatt chriswyatt November 2016 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…

    ... 0-7
    2) Compress 8x2 attributes starting from row 1 separately
    3 ... 8x8 attributes for row 0 to black/black (or maybe all rows ... into $4000 with dzx7_agileRCS
    5) Decompress attributes into [font=Courier ...
    colonel32 colonel32 November 2016 Development
  • A few questions about sound and keys in BASICIf I want sound in my BASIC game I have to use BEEP right ? It seems to lock up the CPU for far too long . On Arjun's page I found how to use CALL 94…

    ... :

    $028e. 5 KEY_SCAN {001} the keyboard scanning ... more than two keys, or pressing two keys and ... 0f 15 00001111
    5 04 4 00000100 T ... 05 5 00000101 G 06 6 ... 3 00000011 Y 02 2 00000010 H 01 1 00000001 B 00 0 ...
    Battle Bunny Battle Bunny December 2016 Sinclair Basic
  • How would you approach parallax?So ... there is this trick by Joffa that we all know...of waiting for the ULA to reach certain pattern on the screen using the IN command. And then s…

    ... go as it only adds 2 t-states. So just ... the top part. Or it could be 5-3-1 or another ratio. You ... need to prepare three times 5 ... just set the carry to 0. Need to see in ... ) so redrawing / remembering background or XOR-ing can be very ...
    tstih tstih December 2016 Development
  • Mysterious error message ?Something just occurred to me, when I try to load certain JSW games which require 128k memory into my emulator in 48K mode I get this error message. …

    ... 48k (H=0), 128k (H=1), +3 (H=2) or unknown (H= ... /> HALT
    RES 5,(IY+1)
    LD HL,5B66H ... CALL 16B0H
    RES 5,(IY+37H)
    CALL ... /> RES 5,(IY+1)
    R034A: LD HL,0
    LD ... DEFW 0D6EH
    SET 5,(IY+2)
    LD DE,(MSERR) ...
    John Elliott John Elliott December 2016 Sinclair Miscellaneous
  • 1987-2017Here we are, with our tradional thread about games released thirty years ago, where we can contemplate how bad they have aged, how bad they [i]alread…

    ... worth of a big fat 0/5

    [b]The ... titles like Firebirds, Galaxian or Space Zombies. 1/5

    [b]They ... not bad for a homage. 2.5/5.

    [b]Collision Course ... adding substance to the gameplay. 3,5/5

    [b]Super G ...
    Alessandro Grussu Alessandro Grussu January 2017 Games
  • Anagram creation - not as easy as it looks?I'm writing a story and I have a mystery villain who is never revealed. My main clue was to have been that every alias he uses is an anagram of the f…

    ... /> 3 DEF FN p(a)=PEEK a+256*PEEK (a+1)
    5 ... /> 27 LET n(c,1)=n(c,1)+1
    29 NEXT a ... /> LET name=name+1: PRINT #0;AT 0,0;name,,AT 0,8;

    0: IF n(c,2) THEN
    LET n(c,2)=n(c,2)-1 ...
    Battle Bunny Battle Bunny January 2017 BASIC
  • c64 .sid player coming soon to specy 128!!!c64 .sid player coming soon to specy 128!!! the first old version uses only square waves, 4 years ago: https://www.youtube.com/watch?v=6CKt9noxA7s…

    ... doesn't load on +2a or +3. Tried USR0 and resetting bit ... 128/+2, banks 1,3,5,7 are contended, on +2a/+3, banks 4,5,6 ... is on page 2, and normally page 0 should be paged ... I will check if page 0 is paged in in all ... During digi playback always page 0 paged in.
    Geco Geco March 2017 Announcements
  • c64 .sid player coming soon to specy 128!!!c64 .sid player coming soon to specy 128!!! the first old version uses only square waves, 4 years ago: https://www.youtube.com/watch?v=6CKt9noxA7s…

    ... get problem with tzx load or tap too?
    TZX ... checker). RAM banks stay at 5/2/0. YM tap version. Here ... br /> Bit 0: Paging mode. 0=normal, 1=special
    Bit 1: In normal ... 2: +3DOS
    ROM 3: 48 BASIC
    Bit 3: Disk motor; 1=on, 0 ...
    FrankT FrankT March 2017 Announcements
  • XeldaI've decided to take on the Zelda tribute game and take over the Xelda title (because it's a great title name). Working with the MK2 Mojon twins gam…

    ... free to use, abuse, adapt or ignore. It encodes the entire ...

    Note avoidance of 0,1,I,O which are the ...
    GReW GReW March 2017 Development
<1…23242526272829…34>

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