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  • ZX-Assembler version 0.8 (beta) releasedDear readers, yesterday I've published ZX-Assembler in its first version 0.8. It offers you some interesting features, even if I know there are …

    ... edit the file directly with byte editor.

    * You either ...
    clausjahn clausjahn July 2015 Emulators
  • Execution map file support in different emulatorsAs I'm now seeking about execution map files, the different emulators support, I want to start a new discussion here. Today, I tried to create a mem…

    ... , where each bit represents a byte of the 64 k memory ... size: 65536 bytes, where each byte calculates the code or data ...
    bit 1: =1 means byte reading
    bit 2: =1 ...
    bit 3: =1 means byte writing
    bit 4: =1 ...
    clausjahn clausjahn July 2015 Emulators
  • Buddy 0.1 demo[url="http://wischner.co.uk/downloads/app.tap"]The tape is here[/url]. Load it, then enable kempston mouse emulation, then reload it. [url="https://g…

    ... text and clipping rect: byte x0, byte y0, byte x1, byte y1; and it ...
    tstih tstih August 2015 Development
  • I feel they could have done this.After reading the ZX Spectrum ULA, I learned about how the ULA detects if the Z80 if going to access memory in the next cycle and stops it if the ULA…

    ... an address and a byte, and the byte gets held in a ...
    wilsonsamm wilsonsamm August 2015 Hardware
  • Mirror tableCan anyone help with a byte mirror table? e.g. so you can look up a byte of a left-facing sprite and return the correct right-facing value. There …

    Can anyone help with a byte mirror table? e.g. so ... you can look up a byte of a left-facing sprite ... way of looking up a byte and returning its mirrored value ... if anyone's got a byte mirror table to hand, please ...
    Morkin Morkin August 2015 Development
  • Code structureHi all, I'd be interested in opinions on the neatest way to do this. I've got a print string routine in which 0-31 are reserved for control codes, …

    ... JP PRINT_STRING so the next byte can be another control code ...
    R-Tape R-Tape August 2015 Development
  • Subtract 4 from an addressThis is a novice Z80 question really: I'm trying to vertical scroll my back buffer, but I'm not sure of the quickest way to apply an offset and mo…

    ... by reading the bottom right byte and copying it to the ...
    Atari_Jetman Atari_Jetman September 2015 Development
  • Rom routine for pixel addressDear all, Having my bi-annual 'lets try machine code' project again and have come up with a problem with the pixel address rom routine at 8874. …

    ... hold the location in the byte of the address transferred to ...
    Tobo Tobo September 2015 Development
  • The right size for Standard Betadisk 48k TR-DOS v4 ROMs is 8k and not 16kHi Emulator-Authors, I just want to clarify, that Betadisk 48 ROMs TRDOS v4 ROMs has size of 8 kByte and not 16k Byte. Only TRDOS v5 (of Beta…

    ... 8 kByte and not 16k Byte.

    Only TRDOS v5 ...
    Luzie Luzie September 2015 Emulators
  • The history of ESXDOS, the DivMMC and the DivMMC EnJOY![img]http://benophetinternet.nl/hobby/divmmc_history/1%20esxdos.jpg[/img] These are the stories behind esxDOS, the most popular operating system e…

    ... the CPLD.
    Transferring a byte to/from the card requires ...
    bverstee bverstee October 2015 Hardware
  • Chompston Mazes in SpecBASAfter the discussion in ASH-II's Pacman thread, I checked out the link there about generating 2D Pacman style mazes. This one was quite good fun, …

    ... from a number to a byte value.

    This has ...
    Dunny Dunny October 2015 Sinclair Basic
  • Drawing some spritesI figured I want to draw some sprites. My target was to do a 16x16 masked sprite. There's no clearing here, just drawing the sprites. My first ite…

    ... 0)

    ; skip third byte completely since it doesn't ...
    Sol_HSA Sol_HSA November 2015 Development
  • Spectrum Screen RAM layoutHi there The spectrum screen layout is rather odd. It seems to be arranged into 3 256 byte groups. If I have an x (horizontal) coordinate (from…

    ... be arranged into 3 256 byte groups.

    If I ...
    Willsy Willsy December 2015 Development
  • 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…

    ... not, we will have the byte that the ULA reads
    chernandezba chernandezba January 2016 Hardware
  • Manic Miner (slightly) Updated1. The new loading screen I put together [url="http://jswmm.co.uk/topic/68-alternative-loading-screen-software-projects/"]here[/url] has been used. …

    ... resulting in a large zero byte gap.

    3. The ... than the more common Bug-Byte one, the reason for this ...
    spider spider January 2016 Brand new software
  • A doubt about IN and OUTIN (and OUT) can use bc to define a 16 bit port to be read or write, when used as in r,(c) or out (c),r. Also, if you use in a,(n) or out (n),a yo…

    ... that immediate as the low byte of the port to be ... is used as the high byte of the port? It is ...
    Zup Zup January 2016 Development
  • LgK image compressorOk people, i decided to make it proper thread since i've finally got something tested & useful for everyone. Here is my "chunky" ZX image compressor …

    ... to showcase it vs the byte-based Spectrum screen compressors.
    Lethargeek Lethargeek January 2016 Development
  • Question of contentionI'm not desperate to go digging through technical descriptions in depth, but one thing bugs me about the Speccy's video contention model - and that's…

    ... bytes of attributes, or 1 byte every 2 T on average ...
    joefish joefish January 2016 Hardware
  • Elite - Save data complete map[code] $0000 Commander Name $0001 Commander Name $0002 Commander Name $0003 Commander Name $0004 Commander Name $0005 Commander Name $00…

    ... ]
    $000C Kill Points Fractional Byte
    $000D Kill Points LSB ...
    Ersh Ersh February 2016 Games
  • less well known but very good gamesI've been looking through this forum for some talk / enthusiasm / recommendations of good games other than the standard, well known classics. I'v…

    ... )
    Rex
    Roboto (bug byte)
    Hyperbowl
    Pippo
    Jim M Jim M February 2016 Games
  • Change internals of RZXIs there any tool that can replace game snapshot inside of RZX? I'm trying to compile new binary, and for testing purposes need to "play" game from …

    ... and compiled binaries are compared byte by byte, I need to check ...
    Bedazzle Bedazzle February 2016 Development
  • Publishers logos and biosAs we are getting more development done, we are looking at extra details not currently available, so will be creating new categories asking for submi…

    ... CRL
    Cronosoft
    Byte Back
    Phoenix Software ... /> Taito Corporation
    Bug-Byte Software Ltd - 04
    ... Telecommunications - 01
    Bug-Byte Software Ltd - Alien - 01< ... Football - 01
    Bug-Byte Software Ltd - American Football - ...
    Lee Fogarty Lee Fogarty April 2016 Publishers
  • TIL: something about floating point numbersHere's something that had me scratching my head for a while until I figured out what was going on. In a BASIC program, floating point numbers are …

    ... ]

    then the 5-byte floating point representation after the ... 14/0x0E byte is 8336666666 - which is actually ... (bit 7 of the second byte - the sign bit - is 0 ...
    SkoolKid SkoolKid June 2016 Sinclair Basic
  • R registerI'm cross-posting this as a spin-off of a [url="http://www.worldofspectrum.org/forums/discussion/52748/zx-spectrum-cartridges/p2"]thread in "Hardware…

    ... on the address bus lower byte, just after fetch, i.e ...
    RMartins RMartins June 2016 Emulators
  • Fuse 1.2.1 releaseA new release of Fuse, the Free Unix Spectrum Emulator, is now available at the SourceForge project: [url="https://sourceforge.net/projects/fuse-e…

    ... ]
    [*] Add Z80 registers, last byte written to the ULA, tstates ...
    Fred Fred July 2016 Emulators
  • Fuse for Mac OS X 1.2.1 ReleasedA new version of Fuse for Mac OS X has been released at the dedicated sourceforge project: [url="http://sourceforge.net/projects/fuse-for-macosx/"…

    ... ]
    [*] Add Z80 registers, last byte written to the ULA, tstates ...
    Fred Fred July 2016 Emulators
  • Must be missing the point - machine code... Hi Folks, Trying my hand at machine code again but falling at the first hurdle. I hand crafted the following to run at address 62000 and the co…

    ... is supposed to fill every byte of screen (not attributes) with ...
    Paddy Coleman Paddy Coleman September 2016 Development
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Latest Posts

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