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  • Games that will be 25 years old this year!Time for my yearly attempt at making everyone feel ancient! :D [url="http://www.worldofspectrum.org/infoseekadv.cgi?what=1&regexp=&yrorder=1&year=19…

    ... Drill
    Gregory Loses His Clock
    Hard Drivin'
    H ...
    deadpan666 deadpan666 January 2014 Games
  • 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…

    ... not classed as a M1 cycle, (need to look in to ...
    Basher Basher January 2014 Hardware
  • 999 and counting, the Dean of GamesOver on Spectrum 2.0 [url]http://www.spectrum20.org/[/url], a true landmark is about to be reached as the amazing Dean of Games will very soon chalk …

    Over on Spectrum 2.0 [url]http://www.spectrum20.org/[/url], a true landmark is about to be reached as the amazing Dean of Games will very soon chalk up his 1000th Spectrum review. Amazingly he only started posting reviews in Feb 2010.

    Dean is ...
    Jumping Stack Jumping Stack January 2014 Games
  • Canonical Spectrum pixel aspect ratioHi, Do any emulators support scaling the Spectrum image to have the "correct/canonical" pixel aspect ratio? On a 4:3 display, Spectrum pixels aren'…

    ... .75MHz. The corresponding Spectrum pixel clock is 14MHz, giving a pixel ...
    mark_k mark_k January 2014 Emulators
  • 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…

    ... the first 4T of each cycle (order: bitmap, attribute, bitmap+1 ...
    Hikaru Hikaru January 2014 Development
  • 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…

    ... uses to detect a tape cycle.
    So, of course, the ...
    Spirantho Spirantho January 2014 Hardware
  • Candy JamIt would appear that King have impressed more than a few game developers of late by trademarking the word candy. To mark this occasion, a few indie …

    ... of 352 other games (and counting) on the Candy Jam site ... . For the hard of counting, that's even more games ...
    jonathan jonathan February 2014 Announcements
  • Refactoring the ULAplus HDL descriptionFor the ZXUnio project, I'm refactoring the Verilog code I wrote two years ago to describe the ULA and the ULAplus devices. When I've taken this code…

    ... /> - I can use the 7MHz clock for everything. Prior versions used ...
    mcleod_ideafix mcleod_ideafix February 2014 Hardware
  • MiCROL "Use and Learn" 1982I have a copy of this book, and was about to throw it out as it is of no use to me - But I always check online first to make sure these books have be…

    ... /> [*]Star Atlas
    [*]Convert
    [*]Clock
    [*]Computer Term Glossary
    Jimmy Jimmy March 2014 Infoseek database
  • New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …

    ... following:
    - the last T cycle when there is no black ... visible.
    - the first T cycle when the black bar appears ... and report the first T cycle when the red bar aligns ...
    Patrik Rak Patrik Rak March 2014 Emulators
  • 4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…

    ... then in the next machine cycle write the number right back ... tack a false write M cycle at the end of the ...
    Basher Basher March 2014 Hardware
  • Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…

    ... HALT, beyond the initial M1 cycle. The Z80 user manual states ...
    zub zub March 2014 Hardware
  • the worlds longest game tape ?just curious if there is a known title... as I was looking at multimixx 4 and that has gauntlet 1 / 2 and deeper dungeons and it reminds me of an ata…

    ... tapes, but I'm not counting em.
    fog fog March 2014 Sinclair Miscellaneous
  • Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…

    ... />
    If anyone wants to clock how many FPS this can ...
    LuMan LuMan April 2014 Development
  • RS232 on Spectrum 128KDoes anyone actually use the RS232 port on the Spectrum 128K? Is there anything useful that can be done with it? I know about the keypad with the Sp…

    ... the slightly out of spec clock speed; same could be said ...
    rga24 rga24 May 2014 Hardware
  • Longest Game Completion TimesMetro article [url=http://metro.co.uk/2014/05/26/weekend-hot-topic-part-3-longest-video-game-completion-times-4738636/]here[/url]. Nice to see the S…

    ... ever do the unlikely and clock something like Manic Miner, which ...
    MattLamb MattLamb May 2014 Chit chat
  • populated Harlequin Rev.D -> Rev.FHi, I like to sell my Harlequin Rev. D board. I modified it to be identical to Rev. F: * switching regulator instead of linear regulator for DC in …

    ... /> * correct hsync timing
    * correct clock phase at edge connector (Rev ...
    ingo ingo June 2014 Sales
  • Albert the wolf: A "make your own platform" open-AGD gameSo here it is you can find it within the usual dropbox folder (there is also a rzx to see how the game works..sort of.. and a TAP for the real hard…

    ... you will find an alarm clock to get 50 seconds bonus ...
    gabriele amore gabriele amore June 2014 Brand new software
  • Hooky - hook ZX ROM and rewire RST and NMI to RAM - rantThis is a rather long rant. Not for short tempered. :) The objective is to hook into RST "vectors" and NMI on a Spectrum without affecting the normal…

    ... not part of a grand cycle timing scheme (and it is ...
    tstih tstih July 2014 Development
  • analysing program variable usageIf I wanted to count the number of times each variable is referenced while a program is running (not the number of times each variable is referenced …

    ... in LOOK_VARS to update a counting table, but how could I ...
    Battle Bunny Battle Bunny July 2014 Sinclair Basic
  • Been reading The Holy Qur'an ...... just to see what all the fuss was about. I've got the Wordsworth edition, translated into English by Abdullah Yusuf Ali, authorised by the Islami…

    ... people (and that's only counting those killings where the Bible ...
    Battle Bunny Battle Bunny September 2014 Chit chat
  • MIA: Airline SoftwareAs discussed in another thread, I was recently reunited with a box containing most (not all) of my original cassettes. Thanks to the advice and help …

    ... Package
    08. Interrupt Driven Clock
    09. Message Scroller
    sj_howlett sj_howlett October 2014 MIA/STP/SDP
  • Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…

    ... occur they must need a clock?

    Any thoughts anyone ...
    Korinel Korinel October 2014 Hardware
  • Do you have this games for sale???Hi! I'm a collector/gamer of ZX Spectrum games and would love to buy these games: 3D Tanx - Complete, DK'Tronics release 3D Tunnel - Cassette only,…

    ... Generation Software release
    Light Cycle - Complete, the PSS release
    Nick_Arrow Nick_Arrow November 2014 Wanted
  • Ensure my interrupt handler begins at the same T-stateHi! Is there a way to ensure that an IM 2 interrupt handler starts always at the same T-state (related to the moment the ULA triggers the INT line, w…

    ... , which most emulators count as cycle 0)?

    So far ... is my routine starting at cycle 19,20,21 and 22 ...
    mcleod_ideafix mcleod_ideafix November 2014 Development
  • ZX Evolution -- contended memory and raster emulationFresh bleeding update for [url=http://www.nedopc.com/zxevo/zxevo_eng.php]ZX Evolution[/url] [url=https://code.google.com/p/pentevo/source/list]Baseco…

    ... read from there at every cycle. If there is any, please ...
    lvd lvd January 2015 Hardware
  • HALT: Why always 4ts?Instruction breakdown of halt is like that: PC 4ts. That means it fetches instruction byte from ram which tooks 4 ts and then does nothing and read…

    ... if cpu executed HALT at cycle 5, and if interrupt triggered ... at cycle 6, cpu will not jump ... to interrupt until cycle 9.

    What's ...
    Arda Arda February 2015 Development
  • Match Day - Maximum number of goals (?) and a bug compilationGreetings. I'm willing to share some stuff about old Ritman's classic Match Day, so let's get on with it. :smile: PART 1 ------ I was curious abo…

    ... right at the moment the clock counter is changing to 45 ... some graphic corruption in the clock, between
    minutes "95" ... When reaching minute "25", the clock graphic is shown as in ... the half (minute 45) the clock graphic will actually
    ...
    DeusX DeusX February 2015 Games
  • Understanding contentionI'm trying to understand contention and its implications when some "weird" bus cycles (such as I/O cycles with I/O addresses in the contended memory …

    ... , but an I/O bus cycle to a contended port (port ...
    mcleod_ideafix mcleod_ideafix May 2015 Hardware
  • Back to the 80's!Some day, you take a wrong step and fall into a time machine that happens to sit on the sidewalk. &lt;:-P<br><br>You find yourself in a busy shopping…

    Some day, you take a wrong step and fall into a time machine that happens to sit on the sidewalk.
    RetroTechie RetroTechie May 2015 Chit chat
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