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<1…15161718192021…34>
  • New multi-interface for ZXI have in development new interface for ZX Spectrum. PCB size is similar as K-MOUSE interface and on board is CPLD (programmable logic), up to 1MB st…

    ... on board is CPLD (programmable logic), up to 1MB static ram ...
    velesoft velesoft September 2013 Hardware
  • Opus Discovery OddnessHi everybody, I'm busy trying to repair an Opus Discovery for a customer. It's proving to be quite frustrating. First off, the LM317T regulator fo…

    ... have tested all of the logic chips.
    The EPROM has ...
    Spirantho Spirantho September 2013 Hardware
  • Pivot, it's like Star Quake but with a twist[B]Pivot[/B] by Podbot is a very recent Flash/browser game which is a perfect idea for a ZX Spectrum game. [url]http://jayisgames.com/archives/2013/…

    ... can't do a screen rotation animation. However I don't ... . You could do a flip rotation, I mean rotate the background ...
    BdR BdR September 2013 New game ideas
  • Ben Versteeg's September sales[COLOR="Blue"][B][SIZE="6"]Add-ons[/SIZE][/B][/COLOR] [IMG]http://benophetinternet.nl/hobby/vanmezelf/sales/line.jpg[/IMG] [IMG]http://benophetinter…

    ... 6 and 128K model memory logic)[/B]
    ?10 / ?11
    bverstee bverstee September 2013 Sales
  • DK?Tronics keyboard troubleI have a DK?Tronics keyboard here, which is causing some trouble. Physically it?s in great shape, but some keys simply do not work. The non-working k…

    ... , d, j, k, Symbol Shift, Left Caps Shift
    and on the ...
    schombi schombi September 2013 Hardware
  • Rendering clipped glyphSometimes you need to render a glyph of arbitrary size to the screen. And clip it. For example: drawing a mouse cursor means combining drawing of a…

    ... that you will need to shift everything 2 bits to the ... the optimal generic algorithm to shift for N bits...also note ... sometimes it is faster to shift left for the same effect ...
    tstih tstih October 2013 Development
  • Ben Versteeg's November sales[COLOR="Blue"][B][SIZE="6"]Almost ready[/SIZE][/B][/COLOR] [IMG]http://benophetinternet.nl/hobby/vanmezelf/sales/line.jpg[/IMG] [IMG]http://benophet…

    ... 6 and 128K model memory logic)[/B]
    ?10 / ?11
    bverstee bverstee November 2013 Sales
  • idea: new gaming interface for ZX Spectrum (48k)First of all, I am not an expert this is just an idea of what I would like to see happening in the modern era of the ZX Spectrum. A compact, small, …

    ... video port
    - integrated DivIDE logic for micro SD card operation ...
    maiki maiki November 2013 Hardware
  • Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…

    ... needed is the ability to shift to the left, and adding ...
    mcleod_ideafix mcleod_ideafix November 2013 Development
  • Tricky ZX RepairHello guys, This time I put my hands on a very nice Issue 3 16K, upgraded to 48K. To bertter explain "nice", it is absolutely mint, not a scratch on…

    ... nothing else on the bus. Logic levels on the Z80 seem ...
    Falco-F8L Falco-F8L December 2013 Hardware
  • ROM replacement using 28C256 EEPROMThought I'd share a quick project I knocked up in order to use a 28C256 EEPROM in place of the standard 23128 ROM in the Spectrum. The connections a…

    ... 't work if the multiplexing logic is socketed though.) Alternatively the ...
    balford balford December 2013 Hardware
  • Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…

    ... ) which replaced the 74-series logic on earlier boards.

    logic 0 than a logic 1), the output ...
    Winston Winston December 2013 Hardware
  • harvard architecture spectrum clone.I got my first +2 before christmas. I'd never given the 128k spectrums much thought, always been a 48k rubber key tradionalist. :smile: I've been me…

    ... a fair amount of glue logic to page the memory in ... and M1 signal plus other logic for some of the multi ...
    Basher Basher January 2014 Hardware
  • Please explain how a Kempston interface circuit works.Can someone help me understand how a Kempston joystick interface works, as I want to design and build my own as an experiment. I understand switches…

    ... experiment. I understand switches and logic, but my knowledge of digital ... type to do both the logic decoding and the data delivery ...
    joefish joefish January 2014 Hardware
  • external storage for Spectrum 128 (HxC floppy emulator)As usual, the first post of a beginner (.. or I should say "a returner") like me shows a big ignorance. I hope you'll forgive me, because I forgot al…

    ... /> Last night, during my night shift in Cremona Hospital (I live ...
    Rorschack Rorschack January 2014 Hardware
  • ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…

    ... much you want it to shift the next time it executes ...
    Hikaru Hikaru January 2014 Development
  • Spectrum+ keyboard problemGot two speccy plusses both with exact same problem. Both have new membranes and both won't do as they are told, basically it boils down to symbol sh…

    ... it boils down to symbol shift putting the computer into extended ...
    Macc Macc January 2014 Hardware
  • ZX-Modules Updater 0.9.1 publishedDear friends of ZX Emulation, today I updated my downloading tool ZX-Modules Updater. I fixed an annoyinh bug with created autostart and Desktop ic…

    ... has been configured a shortcut Shift+W or B respectively by ...
    clausjahn clausjahn January 2014 Development
  • PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…

    ... buffer (74LS08 ), and some discrete logic (2x BC846 with pullups).
    bverstee bverstee January 2014 Hardware
  • Timex Compute TC2048 loading problems solvedHi everybody, I've just finally fixed a TC2048 that had numerous problems. Once I'd changed all the RAM, the CPU and the ULA (surface mounted, for a…

    ... , the ULA just read a logic high all the time.
    Spirantho Spirantho January 2014 Hardware
  • Math Quiz - MultiplicationThe topic is fast multiplication routines, from 8x8 to 32x32 and all points in between. These functions sit underneath floating point libraries, gen…

    ... ; hl = E * H

    ; shift left eight bits

    shift left, costing an additional 43 ...
    Alcoholics Anonymous Alcoholics Anonymous January 2014 Development
  • reversing an LFSRWhat's the correct way of reversing an LFSR so that it produces the same numbers but in reverse order? The little BASIC program below shows a test I …

    ... 5,4,3,2 right shift; reverse taps 1,5,4 ... ,3 left shift); regardless of where I start ... 13,12,10,9 right shift; reverse taps 1,13,12 ... ,10 left shift) the reverse sequence goes wrong ...
    Battle Bunny Battle Bunny February 2014 Development
  • Toastrack membrane replacedI have replaced a couple of rubber key membranes before, had no trouble. I today replaced a membrane on a toastrack. All the keys works, but the ar…

    ... . i.e to simulate sym shift and 6 for example?
    gazj82 gazj82 February 2014 Hardware
  • Castlevania demoFrom the author of the game Survivisection ( [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027982[/url] ) new game project - the legendary C…

    ... ://youtu.be/8GbQ1OVkpXw[/url]
    Shift-special attack
    1-5 ...
    kyv_triumph kyv_triumph February 2014 Development
  • Spec 48K case with a twist...Some people will have heard of the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=37746"]Harlequin[/URL] project under way which is a r…

    ... hardware using off the shelf logic chips.

    It's ...
    balford balford March 2014 Sinclair Miscellaneous
  • Learning a programming language from scratchSome advice please... At work I use an Excel/Calc spreadsheet of my own making to get address information from various csv/txt files I download ever…

    ... the spreadsheet, using the same logic as the formulae I've ...
    leespoons leespoons March 2014 Chit chat
  • Shopping on AliExpress - is it safe?Hi guys i would like to hear if any of you have made any purchases on this site: [url]http://www.aliexpress.com/[/url] ? The reason i ask is that i …

    ... for which i need a Logic Analyser, and the only one ... -100MHz-16-channels-LWLA1016-Logic-Analyzer-Timing-State-Logic-Analyzer-16/632082674 ...
    The_Bert The_Bert March 2014 Chit chat
  • Under development: COUSIN HORACE - with playable demoHi fellow Spec-chums, for the first time ever, I am publicly disclosing some details about a game I am currently working on. It is an epic adventure…

    ... : about [b]15%[/b] (game logic and puzzle defined, text lines ...
    Alessandro Grussu Alessandro Grussu April 2014 Announcements
  • ZX Alien Breed - WIPI'm sure a lot of you have seen the discussion in the New Game Ideas area about a Speccy version of the classic Amiga game Alien Breed. I've been dro…

    ... -copy routine means I can shift individual alien data into the ...
    LuMan LuMan April 2014 Announcements
  • Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…

    ... just a little bit of logic chippery, or just a spare ...
    joefish joefish April 2014 Hardware
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