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  • A tally on the number of successful builds of the Harlequin[SIZE=4][COLOR=Green][U][B]A tally on the number of successful builds of the Harlequin.[/B][/U][/COLOR][/SIZE] Please post your successes below :-) …

    ... keyboard headers and run the tests, but a signal out means ... />
    General feedback:

    0. @Ingo: Thank you for organizing ...
    Trafferth Trafferth May 2014 Hardware
  • UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…

    ... principle achieved with an elaborate timing trick).

    One trick ... a rolling counter as the '0' rolls over into '1', then ... '2', etc. and round to '0' again, at which point you ...
    joefish joefish June 2014 Sinclair Basic
  • displaying all memory activity in a screenDunno why I keep thinking about this, but here goes Is it easy enough to add a screen to an emulator that shows every memory address' activity.... …

    ... in .NET using XNA 4.0, so is by no means ... inaccurate contented memory and interrupt timing model, but seems to work ...
    balford balford June 2014 Emulators
  • 48K: Half of copyright message in the middle of the screen?!Issue two. Has 74LS08 over the Z80, but the ULA is 5C112E-3 (I think this should be a 5C102E??? - I have one, but I'm not sure if it is working, at l…

    ... on the screen, no other tests seem to run. What is ... to 8 to denote bits 0-7)

    This correlates ...
    balford balford June 2014 Hardware
  • USB Keyboard Interface interest?Hi, I was wondering if anyone else out there is interested in a USB interface for the ZX Spectrum (particularly the rubber key models, though it sho…

    ... or less just USB 2.0 comms up and running, anything ... for it) and the first tests of the keyboard matrix scanning ...
    BarryK BarryK June 2014 Hardware
  • DIY Issue 1 Internal 32K RAM expansionFollowing on from the information in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=40173"]this[/URL] thread, I finally figured this ou…

    ... the Spectrum and on the tests:
    [URL="http://gigant.chem ... used for the "production" (V1.0) can be downloaded from here ...
    jimre jimre June 2014 Hardware
  • Fire n' Ice, is it possible to convert it tp tap. or tzx?Wathching a little bit the video from this game in rzxarchive, and it is really outstanding. So I was wondering if its possible to make the trd file …

    ... :

    a) POKE 33060,0 - remove one HALT instruction = AY ... )

    b) POKE 33060,0
    POKE 26513,205,194 ... music speed and bad music timing)
    velesoft velesoft June 2014 Games
  • Official Basinc thread - Bug reports and other discussionI just released a new BASin fork, basinc. The first official release was V16r2, and today it's r3. it's uploaded to wos archive and alternatively, h…

    I have been doing more tests to compare palettes across BASin, ... /> Black 0 0,0,0 0,0,0 0,0,0 0,0,0 0,0,0 0,0,0
    Blue 1 0,0,202 Paddy Coleman Paddy Coleman June 2014 Sinclair Basic
  • 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…

    ... byte value 0 with value 0* (zero plus ... di ; no interrupts for precise timing

    ;; ... the timing
    in a,(#0xf7) ; bit 0
    rs232_ib_beg = 0;
    rs232_ib_end = rs232_buffered_input(rs232_ibuff);< ...
    tstih tstih July 2014 Development
  • RTC module for DIVIDE[IMG]http://velesoft.speccy.cz/other/rtc_module_v01_full_top.jpg[/IMG] [IMG]http://velesoft.speccy.cz/other/rtc_module_v01_full_bottom.jpg[/IMG] [IMG…

    ... DRIVER for RTC module: (v3.0 and higher)
    ===============================================
    timing

    IN ... />
    JOYDIR DEFB 0 ;here save state of 8 ... with this layout : 0,0,C,B,UP,DOWN, ...
    velesoft velesoft July 2014 Hardware
  • Plane confusing...Nowhere near as exciting or complicated as one of Morkin's quizzes, but... Can you work out which game's loading screen was loading into which of ZX …

    ... reason why the first few tests only had 8 colours was ... you a logical colour from 0-15. In standard spectrum palette ... 5 and 7 at offset 0 and $2000 then you could ...
    JeffB JeffB July 2014 Games
  • ZX Spectrum 48K AV IssueOK so I dugout my old 48K Speccy today and decided to AV mod it. I did the mod (pretty easy) but the picture I am getting is this. [url=http://posti…

    ... . The meter should show around 0.6V (if it shows results ... /> If the transistor passes these tests, it is likely perfectly okay ...
    1024MAK 1024MAK July 2014 Hardware
  • Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…

    ... /> │ ├───────────┼──────────────────────┼─────────────┼────────────────────────────────────────────────┤ │
    │ │ aa │ aspiration amplitude │ 0..255 │ breath volume: silent..loud ... -generation │
    │ timing requirement of the parent object ...
    Basher Basher August 2014 Hardware
  • X=Y=ZFirst public outing of X=Y=Z for the 48K Spectrum, a 4-level demo which can be download from: [as TZX] [URL="http://www.bobs-stuff.co.uk/extras/xyzd…

    ... Fuse for Windows (v1.1.0) (tried with both the "Issue ... . Although sometimes it automatically selects "0" to start a new game ... way. Some sort of subtle timing issue, or floating bus issue ...
    ccowley ccowley August 2014 Announcements
  • X=Y=ZFirst public outing of X=Y=Z for the 48K Spectrum, a 4-level demo which can be download from: [as TZX] [URL="http://www.bobs-stuff.co.uk/extras/xyzd…

    ... Fuse for Windows (v1.1.0) (tried with both the "Issue ... . Although sometimes it automatically selects "0" to start a new game ... way. Some sort of subtle timing issue, or floating bus issue ...
    rich_chandler rich_chandler August 2014 Announcements
  • CMWC random number generator for Z80Seeing the interest regarding the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=23070"]Xor-Shift random number generator for Z80[/URL]…

    ... , which they are by definition (0..255 < 256), and that ... generator passes all the diehard tests, regardless of if the output ...
    Patrik Rak Patrik Rak September 2014 Development
  • 'Interesting' Issue 2 modSo I've been lurking on this forum for a while and I've got to the point where I want to see if I can repair a speccy.. so I bought me a 'broken' one…

    ... in the YouTube video (initial tests..) with my Multimeter set to ... left (-5v) 01.0
    Upper right (0v) 0
    Lower left ... (12v) 0
    Lower right ... (5v) 0

    Which ...
    blueowl0708 blueowl0708 September 2014 Hardware
  • Issue 6 repair with a twist...(Starting with a slight grump - the forum ate my first attempt at this so this'll probably end up being a bit terse :)) I got a Issue 6 48K machine …

    ... only. The real memory tests do check AND change the ... X
    Step1: write 0 with up addressing order;
    Step2: read 0 and write 1 with up ... Step3: read 1 and write 0 with down addressing order;
    Step4: read 0 with down addressing order.
    PokeMon PokeMon September 2014 Hardware
  • Issue 6 repair with a twist...(Starting with a slight grump - the forum ate my first attempt at this so this'll probably end up being a bit terse :)) I got a Issue 6 48K machine …

    ... existing walk, inversion and random tests in place, although I ... order;
    ; Step4: read 0 with down addressing order.

    ; Step 1 - write 0 with up addressing order

    ld (hl), 0
    inc hl
    dec ...
    balford balford September 2014 Hardware
  • Chuckie Ess 2 tap doesnt work[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0000959[/url] It loads, you press a key and it returns to Basic! Anyone any idea why or got a …

    ... finishes loading and the following tests are done upon it :-

    if value = 0 then start game normally
    cmonkey cmonkey September 2014 Infoseek database
  • Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…

    ... want to use bank 0 or 2 for timing critical code. Since ... choice, you must page bank 0 if you want uncontended ram ...
    guesser guesser October 2014 Development
  • Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…

    ... want to use bank 0 or 2 for timing critical code. Since ... choice, you must page bank 0 if you want uncontended ram ...
    daveysludge daveysludge October 2014 Development
  • Two, count them, two games from DazmanHi everybody!!! (try reading that without Dr Nick Riviera's voice). We've got two new AGD games by Dazman... [IMG]https://scontent-a-lhr.xx.fbcdn.n…

    ... to be a variation in timing with the first screen on ... to press 2 again before 0 will start the game.
    joefish joefish November 2014 Brand new software
  • 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…

    ... 'm not sure what the tests are telling me, perhaps you ... + I ran the default five tests, all pass, I see the ... interrupt counter go from 0 - 0x2FF (ish) and then I ... Spectrum+ I run the same tests the first four pass, however ...
    Korinel Korinel November 2014 Hardware
  • 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…

    ... the CPU and doing the tests with the red positive probe ... the affected area I got 0.345
    [*]On the INT ... the R26 resistor I got 0.001
    [/LIST]
    Korinel Korinel November 2014 Hardware
  • 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…

    ... as cycle 0)?[/QUOTE]

    Yes. Read section "TIMING" in the ...
    Einar Saukas Einar Saukas November 2014 Development
  • 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 …

    ... . On all of them, the timing can be constrained to be ... 's not possible to run tests on the entire circuit at ... . Now you can run live tests on the entire design to ... implementation cannot meet the same timing, it cannot be measured for ...
    Alcoholics Anonymous Alcoholics Anonymous November 2014 Hardware
  • Detecting flash mode inversionsIs is possible to detect with certainty when flashing characters change from normal to inverted and vice-versa?

    ... was called, and the timing would have to change slightly ... br /> 20 FOR r=0 TO 0 STEP 0:
    PRINT AT ... LOOP1:
    ld b,(ix+0) ;B =cols =bytes to ... -1 after segment change, else 0
    inc d ;increment ...
    Battle Bunny Battle Bunny November 2014 Development
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