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  • TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…

    ... .datacassete.com.br/tech/material/ZX-Spectrum/70.html"]http://www ... .datacassete.com.br/tech/material/ZX-Spectrum/70.html[/URL]
    3.575611 MHz, so the frame ... range of $4000-$7FFF are contended, or just the even numbered ...
    zub zub January 2013 Hardware
  • Upgrade ZX Spectrum 128,+2,+2a/b,+3[B]1. Debugging RD #7FFD ZX Spectrum 128,+2:[/B] [url]http://zx.clan.su/forum/8-121-1#795[/url]

    ... IM2 table is in slow(contended) ram. GAL chip use one ... correct, but with raining are ZX ram unstable and software often ... real ZX48/128/+2/+2A/+3 models use TR-DOS and ... run big part of russian ZX games/demos/utilities, but often ...
    velesoft velesoft March 2013 Hardware
  • Buzzer sounds tips'n'tricksSo I have an ARM Cortex M3 with a buzzer connected to its GPIO pin. And because I read this forum I know that there is no need to add a separate buzz…

    ... decompressor fit in the (contended) 16k ZX version to produce say ... [url]http://alonecoder.narod.ru/zx/SYS.rar[/url] ).
    contended memory, the sound ... for the player and 3 for the music. You ... url]http://alonecoder.narod.ru/zx/ADPCM.rar[/url]
    ...
    introspec introspec May 2013 Development
  • Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…

    ... 128K banks 1,3,5 and 7 are all contended. Expect an ... or executing code in a contended bank, your execution time will ... be done on a 16K ZX Spectrum, because their execution speed ... /> IO port $fe is also contended, but I'll leave that ...
    GoingDigital GoingDigital September 2013 Development
  • coding guruOk I'm looking for a to help me in my quest to do my first proper game. The 80's child in me thinks he can do it, But the 2013 man in me knows zip. …

    ... 128 (banks 1, 3, 5, and 7 are contended on the early ... for drawing the graphics, and ZX BASIC or z88dk for the ...
    chev chev September 2013 Sinclair Miscellaneous
  • FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…

    ... not too sure of this. 3.5 MHz / 119200 baud = 29 ... , especially when executing and accessing contended memory. Nowadays, I expect a ... two possible breakpoints commands on ZX Spectrum that I can think ...
    zub zub March 2014 Development
  • FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…

    ... not too sure of this. 3.5 MHz / 119200 baud = 29 ... , especially when executing and accessing contended memory. Nowadays, I expect a ... 'm using IF1 and Standard ZX Spectrum 48 Kb /no additional ...
    tstih tstih March 2014 Development
  • Spectrum screen layoutSeeing the thread on displacement I was wondering why the spectrum had the stupid screen split into three sections and the addresses for each section…

    ... Smith's book, 'The ZX Spectrum ULA: How to Design ... quarter containing the 16K of contended RAM and an upper half ... 14 bits of addressing for contended RAM are divided up ... chips for the 16K of contended RAM, with each chip ... 25, 5, 21, 13, 29, 3, 19, 11, 27, 7, 21 ...
    zub zub May 2014 Sinclair Miscellaneous
  • Test screens for ZX PrismNot sure that this is *really* the right section for this request, but it's relating to new hardware I'm developing so let's start it off here - a mo…

    ... "screen 1" and "screen 3" to achieve double width.
    3.

    Unlike the 128K spectrums, ZX Prism allows ... br /> ...
    1000 - plane 3 - (screen 3 only) - in standard palette this ... ZX Prism's video memory is dual port, so no more contended ...
    JeffB JeffB July 2014 Hardware
  • Please explain Spectrum FPGA-clones to meI've been using the great ZXDS-emulator on the DS XL so far, which is great. But I kinda missed toying around with hardware. I've tried bidding on a …

    ...
    I'm developing ZX Prism, my own "dream" ... of what became the ZX Prism hardware specification (ie ... was using for non-contended Video RAM than was ... honest)

    ZX Prism currently models a 512K ... from original ULA timings - 3.5MHz, 7MHz, 14MHz and ...
    JeffB JeffB November 2014 Hardware
  • AVR ZX Spectrum V2_0Good time! Glad to present my new development - AVR ZX Spectrum V2_0. Sorry, have no english version of this video. [url]http://www.youtube.com/watch…

    ... the original Spectrum models with contended memory?

    Aquaplane working ... .cgi?id=0000227&loadpics=3[/url]

    Try also ... /> [url]http://www.retrosouls.net/zx/dreamwalker.zip[/url]
    [url ...
    Pegaz Pegaz December 2014 Hardware
  • AVR ZX Spectrum V2_0Good time! Glad to present my new development - AVR ZX Spectrum V2_0. Sorry, have no english version of this video. [url]http://www.youtube.com/watch…

    ... the original Spectrum models with contended memory?

    Aquaplane working ... .cgi?id=0000227&loadpics=3[/url]

    Try also ... /> [url]http://www.retrosouls.net/zx/dreamwalker.zip[/url]
    [url ...
    Vasil Vasil December 2014 Hardware
  • Spectrum +3 blinking yellow/blueI received a +3, which only gives a yellow/blue blinking border during initialization. Pressing BREAK when powering on does not work, neither does a …

    ... ) IC that provides bits 0-3 of contended RAM, i.e. IC3 ... [url="https://github.com/brendanalford/zx-diagnostics/wiki/Firmware"]here[/url ...
    balford balford September 2015 Hardware
  • Best Z80 Assembler for PC?There's probably already a thread for this so if somebody could please point me at it I'd appreciate it. If there isn't then please respond here wit…

    ... with measuring T-states in contended memory if the wait per ... kills the idea for the zx because you need to be ... ,(mem)" instruction. But t(start+3) == t(start) + 13 as "ld ...
    Alcoholics Anonymous Alcoholics Anonymous February 2016 Development
  • Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…

    ... was originally looking at the +3 .dsk version which unfortunately ... as seen in [url=http://zx-pk.ru/threads/19404-renegade ... i] because these have differently contended pages or w/e
    3 *insert appropriately suggestive onomatopoeia as ...
    Hikaru Hikaru April 2016 Games
  • P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…

    ... 453b-489c-b17b-d3ed6fccd594/WOS/ZX/POW/FastDumpDemo_1.szx"]sample demo ... 453b-489c-b17b-d3ed6fccd594/WOS/ZX/POW/FastDumpDemo_1.gif[/img]
    contended screen RAM
    3 - Blue Border marks ... will allow to do some contended work, as soon as ...
    RMartins RMartins June 2016 Development
  • P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…

    ... 453b-489c-b17b-d3ed6fccd594/WOS/ZX/POW/FastDumpDemo_1.szx"]sample demo ... 453b-489c-b17b-d3ed6fccd594/WOS/ZX/POW/FastDumpDemo_1.gif[/img]
    contended screen RAM
    3 - Blue Border marks ... will allow to do some contended work, as soon as ...
    Maziacs Maziacs June 2016 Development
  • New game: Metal Man Remixed + book "ZX Spectrum: a visual compendium" by Sam Dyer<div>Metal Man Remixed&nbsp;It's the considerable&nbsp;improved version of Metal Man Reloaded.<br>The game was made especially for Bitmap Books.<br>T…

    ... sound on original
    ZX Spectrum machines with contended #FE port
    3

    - slightly reworked background ... bike sub-level of level 3

    - fixed minor bug ...
    Oleg Origin Oleg Origin February 2017 Brand new software
  • What are the differences between the +2 and the +2A ?I only acquired a +2 for the first time in my life a few months ago. It works fine. :) I even managed to tracke down nearly all the wargames by the s…

    ... problem here, was that the ZX Spectrum 48k model was not ... Amstrad developed the +2A and +3, they switched away from using ... 24, page 195), and the +3 (chapter 24, page 189). They ... thing about which banks are contended and which are uncontended despite ...
    1024MAK 1024MAK February 2017 Games
  • ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…

    ... thought, I had a working +3. Unfortunately, it has not proven ... black without bringing up the +3 menu, it mostly does ... ([url=https://github.com/brendanalford/zx-diagnostics/wiki/Tape-Tests]this ... it was accessing the non-contended memory banks and retrieving the ...
    The Mighty Dopethrone The Mighty Dopethrone November 2017 Hardware
  • Detecting +3 / +2AWhat's a simple but reliable way to detect if code is running on a +2A/+3? My first though was to try switching to ROM2 and then checking for the …

    ... reliable detection of a +2A/+3 that [i]does not[/ ... ) ;place a byte from contended RAM on the bus
    3
    [/code]

    ... bus behaves on the +2A/+3. Follow the link in ... http://sky.relative-path.com/zx/files/plus_three_or_not.zip"]A ...
    Ast_A_Moore Ast_A_Moore December 2017 Development
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Latest Posts

  • Minor British Sports that did become games on the ZX Spectrum
    dmsmith on April 22
  • I bought an accoustic guitar. How do you play it?
    Maroc's Other Projection on April 22
  • Goodbye Z80
    moggy on April 22
  • Happy 40th Birthday to the Amstrad CPC464!
    AndyC on April 22
  • Another Birthday! The Game Boy Is 35!
    dm_boozefreek on April 22
  • I am currently watching.....
    Antiriad2097 on April 22
  • European Software Titles with an English version
    harriusherbartio on April 22
  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on April 22
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on April 22
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21

HitBox

Word Docs Hits
zx 41.5K 63.9K
3 69.8K 108.5K
contended 1.2K 2K

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