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  • Loading Images/Screens mid-gameHi all, Looking to get back into a bit of coding and I couldn't figure out a way to do the following: I have an image/SCREEN that I'd like to b…

    ... , 30000[/b] ; source address to read from
    [b]LD DE , 16384 ... = 29000 TO 65535
    20 READ A : IF A 1000 THEN ...
    spider spider April 2018 Sinclair Basic
  • Spectrum 128k +2 Grey internal EAR modHi guys, I have done the EAR mod to my Spectrum +2 Grey as per this tutorial and want to load programs using the TZXDuino. http://retrocable.com/?p…

    ... the original signal is passed from internal tape player to spectrum ... and instead the signal coming from external source is passed to ... time.

    Yes, GND from EAR socket goes to GND on ...
    Renegade Renegade May 2018 Hardware
  • Dual joystick interface schematic?Hi! Would anyone have a schematic for a dual joystick interface? Cursor or sinclair would either work. If not, I might try my hand at designing one.…

    ... ) interface. The emulator supports input from 4 joysticks / USB gamepads. I ... !
    Set the emulator to read from Sinclair 1 and 2, IN ...
    MatGubbins MatGubbins July 2018 Hardware
  • Specemu XmasEditionOk all, This is a version that fixes TR-DOS (not by me), and adds some other bits. NOTE: This is not a TR-DOS fix from me, it's from A N Other.…

    ... a TR-DOS fix from me, it's from A N Other ... the TRDOS-fix was not from you... could you please tell ... -Editon?
    [/quote]

    From what I have been made ... status register could not be read from the floppy controller.
    polomint polomint December 2018 Emulators
  • ezcode on plus 3Hi, I’m filling my evenings at the moment typing in the ezcode listing from Spectrum machine language for the absolute beginner by the elusive Mr …

    I learnt assembly from that book. I remember typing ... just use a loop to read from data statement.
    Pobbit Pobbit January 2019 Sinclair Basic
  • A Yankee in IraqI'm testing the game on the zx next and it currently hangs right after the game starts no matter what timing regimen and contention pattern is chosen…

    ... caused by the loop reading from port 0x40ff is causing the ... I change the loop to read from port 0x00ff to avoid the ...
    Alcoholics Anonymous Alcoholics Anonymous February 2019 Development
  • Converting Issue 2 keyboard games to Issue 3Dipping back into the World of Spectrum (and no, not just this site) I was wondering if I could do a machine code job myself without having any under…

    ... is to AND the value read from the port with $1f prior ...
    Ast_A_Moore Ast_A_Moore April 2019 Games
  • SpecIde updated!Hi, all! In these past months I've been brushing up a bit my emulator, SpecIde, a.k.a. the least efficient emulator in the world. At this momen…

    Neat! It would be great it all the options could be read from a simple config (text) file sitting, say, in the same directory as the executable.
    Ast_A_Moore Ast_A_Moore May 2019 Emulators
  • Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…

    ... , and 'only' require only 32x48, read from a linear buffer.

    read attrs from.

    Also checked ... really admire too.

    From what I can gather for ...
    Dax Trajero Dax Trajero August 2019 Development
  • Fastest emulator screen renderingHi, I'm developing an algorithm for fast emulator screen rendering and here is what I came up with. 1) Use 4bpp indexed image format as target …

    ... , and multi-color modes. I read somewhere that some software also ... depends on IN reads (that read whatever's on the bus ... last byte that the ULA read from for unsupported ports. So while ...
    Dunny Dunny November 2019 Development
  • Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…

    ... return #FF for port reads from unattached ports, whereas the +2A ... above table) or a byte read from, or written to, contended memory ... />
    That’s a quote from his post on another forum ...
    Ast_A_Moore Ast_A_Moore November 2019 Development
  • Putting downloaded Speccy games and music to tape, does it still work?Thought to ask first, before wasting hours of my time for nothing. I have read from somewhere that modern Windows players will spoil the wav so it wi…

    [quote="Spectrum48K;57524"] I have read from somewhere that modern Windows players ...
    Ast_A_Moore Ast_A_Moore March 2020 Games
  • The Diagnostic PCBIt arrived in the post today so this is my first go with the Diagnostic PCB. (bought on Ebay) This item , I think , does the same job as Retroleu…

    ... when the CPU tries to read from it. So it should start ... Spectrum ROM (BASIC). Then load from tape (or another audio source ...
    1024MAK 1024MAK March 2020 Hardware
  • Understanding tape edgesI've never done any tape reading code. But I've read about these "edges" on multiple occasions. Trouble is I don't understand what they heck they are…

    It looks like it. The edge detection is done by XORing the sample from EAR bit 6 with the previous sample, and treating non-zero as an edge.

    http://www.worldofspectrum.org/ldbytes.html (05ED LD-SAMPLE near the bottom).
    colonel32 colonel32 March 2020 Development
  • Understanding tape edgesI've never done any tape reading code. But I've read about these "edges" on multiple occasions. Trouble is I don't understand what they heck they are…

    ... you don’t read any new value from the port and the ... a new value has been read from the port, you leave the ... a zero. After you’ve read eight bits, you write them ... care whether the signal changes from 1 to 0 or 0 ...
    Ast_A_Moore Ast_A_Moore March 2020 Development
  • Have you got a project or are doing anything interesting during lock down?I’m “having” “fun” cutting shapes in wall tiles to fit around the electrical switches, sockets and heating/boiler control box in the utility room. …

    RETURN returns from a GO SUB command. ... at was meant to start from a line other than the ... sets the line that you READ from next time. But you can ... t RESTORE you will just READ from the first DATA command in ... the program, until you have READ all the values in it ...
    i love the z80s i love the z80s April 2020 Chit chat
  • run statement clears dimensional arraysis there any way round this? id rather not type goto 1 all the time, to stop this

    Would it be possible to poke the values into a memory location that isn't affected by CLEAR, then read from those locations on running to rebuild the arrays?
    Antiriad2097 Antiriad2097 May 2020 Sinclair Basic
  • run statement clears dimensional arraysis there any way round this? id rather not type goto 1 all the time, to stop this

    ... 't affected by CLEAR, then read from those locations on running to ...
    Luny Luny May 2020 Sinclair Basic
  • run statement clears dimensional arraysis there any way round this? id rather not type goto 1 all the time, to stop this

    ... 't affected by CLEAR, then read from those locations on running to ...
    Antiriad2097 Antiriad2097 May 2020 Sinclair Basic
  • Useful Hacks and Alterations ArchiveBeyond infinite lives and 'cracked' games (which I don't like much) there are several really useful hacks of Spectrum games that make them - more pl…

    ... checks for O and P read from dffe twice when once would ...
    StuBruise StuBruise August 2020 Games
  • 128K refurb.... What is the best way?Here's the latest Spectrum I got... Finally got a Toastrack... Not sure if it was good value ( around US$100 ). [img]https://os.blackice.com.au/us…

    ... errors that I see copied from one diagram to the next ... the ram and have gone from permanent black/white bars to ... ROM and the addresses being read from it according to the oscilloscope ...
    cj7hawk cj7hawk March 2021 Hardware
  • Need help finding a suitable emulator...Hi All, I've been working on a concept of superformatting a microdrive cartridge, so that a normal interface 1 can store up to 600Kb on a single c…

    ... 7k screen image files from zxart. Total capacity is ... ensures that during a read operation, as long as ... the virtual cartridge when read by an Interface 1 ... but they will all read reliably in a single ... Microdrive is selected, ie, read from the first sector in ...
    cj7hawk cj7hawk June 2021 Emulators
  • Ukraine CrisisThe other thread got a bit muddled and I wanted to start one on more recent, hopeful (even if only slightly) developments. https://www.reuters.com…

    ... to do their own research. Read independent sources about the current ... Banderists (followers of Stephan Bandera). Read from independent sources if at all ...
    dmsmith dmsmith April 2022 Chit chat
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... to know how to read 2 bytes from a table into a ... /> is one way to read from location from a table of 16 bit ...
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • Max RAM for ZX Spectrum gamesHow much RAM can be used for single level/whole game? On tape writing.

    ... an extra 2K or 4K from the screen if you have ... need with the ULA to read from it to display the screen ...
    deusexmachina deusexmachina October 2022 Development
  • Loading games from MP3 playersI read on here ages ago about people running Speccy games from MP3 players or iPods.. Would I be right in assuming that you would plug said player i…

    I read on here ages ago about people running Speccy games from MP3 ... into the Spectrum via the EAR/SOUND socket (depending on your ... into WAV files and run from my iPod..

    Thanks ...
    zeropolis79 zeropolis79 April 2009 Hardware
  • +2A ear socketI am new to the wos forums but have played spectrums for many years ;). I was hoping someone could help me because i have a spare +2A which I would l…

    ... to add an ear socket onto for loading from mp3 with a ... speccy with ay chip and ear input. Im hoping I can ... a spare spectrum. I have read on other forums its possible ...
    rustyredline rustyredline November 2009 Hardware
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    John Elliott on April 21
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