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<1…24252627282930…34>
  • Mastering flagsI'm little lost when different flags are set/reset after logic operations, and what conditions must be met. For example, [code] ld a, MODE…

    ... (P, bit 7 = 0) or negative (M, bit 7 = 1)

    ... (PE: P/V=1, PO: P/V=0)
    1. In INC r ... when the result crosses 0), otherwise set to PO ... , 4...), otherwise PO.
    3. In block operations (LDI, CPI ... is set when BC reaches 0, otherwise PE.
    4 ...
    Hikaru Hikaru September 2016 Development
  • 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 …

    ... 48K mode:-
    PRINT USR 0

    To enter ... of basic programs from disk or ram disk.

    ... the same way as drives 1 and 3 are on the left ...
    harriusherbartio harriusherbartio September 2016 Hardware
  • 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"
    230 REM F=0 - PLOT, X=+ve, Y=+ve ...
    240 REM F=1 - DRAW, X=+ve, Y=+ve ... =+ve
    260 REM F=3 - DRAW, X=+ve, Y=- ...
    Paddy Coleman Paddy Coleman October 2016 Sinclair Basic
  • I'm writing an Operating SystemOkay this might seem like a bait thread, but I am legitamately interested in figuring out how to write a multi-process system for the ZX Spectrum (no…

    ... [16];
    ...
    if (err != 0) {
    dos_filenum[fd] = NULL;
    or eliminate the redundant stores to ... of 1 as a low byte, and a diff of 2 or 3 ... as a high-byte (i.e. allowing for 1 overflow ...
    u6c87 u6c87 October 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 complicate ... numbers always appear as 2- or 4-digit numbers, depending on ... you refer to byte values or word values (two bytes is ... lengths, from 1 to 3 digits for bytes, and from 1 to 5 ...
    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 ... numbers always appear as 2- or 4-digit numbers, depending on ... lengths, from 1 to 3 digits for bytes, and from 1 to 5 ... 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…

    ... the screen?:

    1) RCS and compress bitmaps including ... lines 0-7
    2) Compress ... attributes starting from row 1 separately
    3) With NIRVANA+ off, ... attributes for row 0 to black/black (or maybe all rows ...
    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…

    ... manual). If no key or one key is being pressed ... for multi-key-combo or multi-player games where ... more than two keys, or pressing two keys and neither ... ? hh dd bbbbbbbb
    1 24 36 00100011 Q 25 ... 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…

    ... . rows (char rows...1 row=8 scan lines)0-4...clouds, rows ... the top part. Or it could be 5-3-1 or another ratio. You ... just set the carry to 0. Need to see in how ... (predictable) 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. …

    ... running in 48BASIC, 128BASIC or +3BASIC. The VERS subroutine ... 48k (H=0), 128k (H=1), +3 (H=2) or unknown (H ... LD A,H
    OR A
    JR Z, ... RES 5,(IY+1)
    R034A: LD HL,0
    LD ...
    MSRET: DEFW 0
    MSERR: DEFW 0
    ;
    not128 ...
    John Elliott John Elliott December 2016 Sinclair Miscellaneous
  • Comp.Sys.Sinclair Crap Games Competition 2017As the creator of the second-least crap game in last year's competition (and the only mug stupid enough to agree to host it this year) I am proud/ash…

    ... attribute-based scrolling, either vertically or horizontally. They use a back ... two tricks. The first number, '3', says how many sets of ... 't forget to change the '3' on line 9090 to '4 ... >0 THEN LET c=64+(s*8)+s: POKE a+1 ...
    joefish joefish 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…

    ...

    [code]
    3 DEF FN p(a)=PEEK ... : RANDOMIZE size: CLEAR start-1:
    LET start=FN ... 27 LET n(c,1)=n(c,1)+1
    29 NEXT ... /> LET name=name+1: PRINT #0;AT 0,0;name,,AT 0,8;
    < ... br /> PRINT #0;AT 0,8;n$: LET OK=1
    64 ...
    Battle Bunny Battle Bunny January 2017 BASIC
  • That's my last ZX Spectrum projectHi4all, I want to show my last project: https://www.youtube.com/watch?v=za_p9Mbfu0Y I wish to release a v1.0 very soon! Best regards

    ... some details to get version 1.0, but what goes, goes ... in times walks by +/- 2 or 3 microseconds per frame. Ojito, that ... solved in PI 2/3 leaving the CPU-0 to handle the ... USB and using the CPU-1 for the core of the ... I hope to get version 1.0 by the end of the ...
    colonel32 colonel32 February 2017 Emulators
  • Scrolling loader counter in 85 T-States?Would it be possible to write a scrolling loader counter in 85 T-States? I have a custom screen load routine that loads attribute first, then the …

    ... (compressed or normal). The counter graphics are stored 0,1,2,3,4 ... ,5,6,7,8,9,0. It ... back to the last 0 when it prints the ... ; 4ts
    ld hl,patchjr+1 ; 10ts
    ld (hl), ... gcp, gcpand and getcountbyte+1 in the patchgc routine.
    FrankT FrankT February 2017 Assembler
  • My new Punk music radio showHi folks, just posting that i now do a punk music radio show on the internet if anybody fancies a listen, i play punk, OI!, folk punk, goth, bit of t…

    ... XIV - Can You Dig It? (1:52)
    2. The Prisoners - Don ... (2:06)
    19. Man or Astro-Man? - Antimatter Man (2 ... - London Calling (2:35)
    52. The Juvies - Into The Fire ... Hicksville Bombers - Whole Lotta Rosie (3:52)
    75. Psycho DeVilles - Burn ...
    mel the bell mel the bell February 2017 Chit chat
  • New Game: A Yankee in Iraq (2017). A shoot-em-up.Last year, I [url="https://www.worldofspectrum.org/forums/discussion/53207/new-game-2016-revival-a-yankee-in-iraq-1992"]resurrected my old shoot-em-u…

    ... the menu (seems hardcoded to '0’).[/quote]
    Ah, but that ... screw up redefining the keys, or worse, select, say the Kempston ... )
    - Pre-shifted sprites [size=1]or maybe even *ahem* Hell D ... shifted sprites and animation.)
    3. Holy crap, that’s some ...
    Ast_A_Moore Ast_A_Moore February 2017 Brand new software
  • 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…

    ... 't load on +2a or +3. Tried USR0 and resetting ... on 128/+2, banks 1,3,5,7 are contended, on ... get problem with tzx load or tap too?
    ... 2, and normally page 0 should be paged in ... will check if page 0 is paged in in ... digi playback always page 0 paged in.
    Geco Geco March 2017 Announcements
  • Simple/standard Linux assembly development environmentIs there a standard or recommended Spectrum Z80 assembly language environment for Linux based folks? I was looking at the assembly language posted in…

    Actually both packages are old or out of date.

    ... sdcc is 1.5 years old and z88dk ... in the last year and 3.5.0 would have caught the ...
    Alcoholics Anonymous Alcoholics Anonymous March 2017 Development
  • "ZX80 Brain" RPN CalculatorIt is at times like [url=https://www.worldofspectrum.org/forums/discussion/54176/depression]when threads such as this are posted[/url] that I get the…

    ... early Sinclair calculators and redefine 0-9, E, + and - to ... trig function should be 0 but the accuracy of ... 2 returns the correct value 0. Higher values of X ... are fine whether using PI*1.5 or 3*PI/2. TAN of ... 't multiply by 0.5!), COS returns 0, TAN will beep ...
    The Mighty Dopethrone The Mighty Dopethrone March 2017 Sinclair Basic
  • New ZEsarUX beta - RC2Hi I have uploaded a new ZEsarUX beta version on the usual url https://sourceforge.net/projects/zesarux/files/Beta_and_Snapshot_versions/ This…

    ... 0123456789:;?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????0 1 2 3 4 5 6 7 ... 48 49 50 51 52 53 54 55 56 ...
    dbolli dbolli March 2017 Emulators
  • I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…

    Still playing Yakuza 0...

    I'm ... ve finished up all but 1 substory per character, and ... both disco dance battles 1 for Kiryu, 1 for Majima. I ... Sotenbori with majima after 2 or 3 attempts. But even after ... with Amon, possibly 1 each for each character.
    dm_boozefreek dm_boozefreek April 2017 Chit chat
  • ZXBaremulator 35th anniversary editionHi, to celebrate the 35th Spectrum anniversary, I've released the first complete Spectrum 48K bare-metal emulator for Raspberry PI. It's available…

    ... better control over graphics/audio or keyboard ?
    [/quote]

    3 ZXBaremulator uses CPU-0 to handle interrupts and CPU-1 for ... perfect with ocasional frames lasting +1 to +3 usecs. I can update ...
    zx81 zx81 May 2017 Emulators
  • How to separate a character from a number in a string?Hi I've been writing a kind of logo type program in BASIC that takes a string a$ from INPUT and then draws according to what you give it. Say you w…

    [code]
    3 REM If all actions ... $=action letter; act=1 if letter; else=0:
    REM num ... br /> REM d$=action name (or "" if unknown action)
    ... a+256*PEEK (a+1):
    DEF FN d ... 1000 INPUT a$: PRINT INVERSE 1;a$:
    IF a$=CHR ...
    Battle Bunny Battle Bunny May 2017 Sinclair Basic
  • My new Punk music radio showHi folks, just posting that i now do a punk music radio show on the internet if anybody fancies a listen, i play punk, OI!, folk punk, goth, bit of t…

    ... reggae show.

    1. The Honeyshop Screamers - Half Eaten ... The Beat - Stand Down Margaret (3:52)
    13. The Specials And ... mighty mighty bosstones - lights out (0:50)
    59. Do ... amp; The KGB - She Got (3:52)
    61. Citizen Fish - Sacred ...
    mel the bell mel the bell May 2017 Chit chat
  • Why don't the variables print where I told them too?I wrote the following program to experiment with creating sounds using 3 notes of BEEP and having the ability to change the notes up or down one at a…

    ... /> 10 IF a=1 THEN PRINT a$(1)
    20 IF ... br /> 30 IF a=3 THEN PRINT a$(3)

    ... They could be aSuccess=1, aFail=2, aDunno=3. Rewritten with those ... slot 8. The return (or Enter) key is in slot ... mind that KEYST returns a 1 or 0, so there's no need ...
    Dunny Dunny May 2017 BASIC
  • SD Card Interfaces for the ZX Spectrum : the complete list OK I admit it : this thread will start life as the incomplete list of SD card interfaces but the aim is to list the lot

    ... of NOT having USB, Ethernet, or Wi-Fi connectivity as well ... ;yrorder=1&year=0&type=0&players=2&turns=3 ... &memory=0&language=0&country=0&licence=0&feature=0 ...
    pelago pelago June 2017 Hardware
  • Database model ZXDBRecently, I have been trying to figure out how to provide my contribution to whoever takes over WoS archive rework next... So I came up with this: …

    ... =3&memory=0&language=0&country=0&licence=0&feature=0 ... =0&have=1&also=1&sort=1&display=1&loadpics=3 ...
    Is this a bug or ...
    LadyEklipse LadyEklipse July 2017 Announcements
<1…24252627282930…34>

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