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  • +3 - beeper sounds but no AY musicHi guys I am repairing a plus 3 revision 2 board that had no sound at all. Using schematics from https://zxnet.co.uk/spectrum/schematics/ I manage…

    ... calibrate the oscilloscope using the clock pin on the z80, this ... further up the circuit. Or timing?
    colourclash colourclash May 2019 Hardware
  • Setting breakpoints in source code to make debugging easierAfter two years I've resumed my Speccy coding project. I'm porting a yet "unported" game from C64/Atari to 48k Spectrum using Z80 assembler. At the m…

    ... to a console
    - Disable clock timing (great for making debug code ...
    evilpaul evilpaul August 2019 Development
  • ZEsarUX Beta 8.1Hi! I have uploaded a new ZEsarUX 8.1 BETA version. You can download compiled versions for Windows, Mac, and the source code from: https://gith…

    ... . [quote]
    Improved accurate Z80 timing: IM mode 0 is 1 ... 0 interrupts, use a 6 clock INTA cycle instead of 7 ... clock INTA cycle as used by ...
    mcleod_ideafix mcleod_ideafix November 2019 Emulators
  • Understanding tape edgesI've never done any tape reading code. But I've read about these "edges" on multiple occasions. Trouble is I don't understand what they heck they are…

    ... fundamental issue is one of clock recovery. In any system where ... to be able to recover timing data. If, for instance, we ... , or just variation in the clock of the device that output ...
    Winston Winston March 2020 Development
  • ZX Spectrum EmulatorsI'm putting together a (hopefully) comprehensive list of all ZX Spectrum emulators available for the new WoS site. Obviously we'd like the latest …

    ... fly, 16 video timing modes which affect master clock speed and number ... going to run unless the timing-critical stuff is emulated.
    colonel32 colonel32 March 2020 Emulators
  • 48k Spec with composite video mod, screen adjustment possible?I've had a 48k Speccy with a composite video mod for a few years now, and although it works perfectly otherwise, the screen isn't centered correctly …

    ... ) rather than anything else. The timing is fixed inside the ULA ... ULA uses for its master clock timing.

    Maybe the DVD ... grey would have the same timing. The +2A/+2B will be ... in terms of the signal timing.

    [b][i]Mark ...
    1024MAK 1024MAK August 2020 Hardware
  • If Sinclair computers had not been sold...I was just having a random thought. If Sinclair Computers (or the rights to them, not sure how it 'worked' back then) had not been sold to Amstrad…

    ... one crystal for the pixel clock (the ULA circuitry) and a ... 128K machine.
    [*]There are timing delays, so that when a ...
    1024MAK 1024MAK August 2020 Hardware
  • 48k spectrum pausing the clockI had a spectrum 3b motherboard donated to me with no case. So i have decided to put it in a custom case with built in kempston port etc. I also …

    ... />
    If you stop the clock to the Z80 for too ... ’ can completely mess up the timing in the Z80 microprocessor.
    clock, you may want to investigate ...
    1024MAK 1024MAK September 2020 Hardware
  • Gyroscope - reverse engineering the 3 title theme tunesHello, Does anyone know if anyone has done any disassembly work on Gyroscope? I'm particularly looking to get the three title tracks back into a …

    ... , I had to recalculate the timing. Different clock-rate and different instructions ... remember how accurate was the timing of the music. Since the ...
    Asimo Asimo April 2021 Assembler
  • More "What could have been"... The Z280.So in chasing up the Loki specs, I happened upon some parallel developments... And had Sinclair gotten to make the Loki, there could have been some i…

    ... z80 with integrated peripherals, faster clock and three or four new ... gone. Different instruction lengths and timing would mean all the carefully ...
    Alcoholics Anonymous Alcoholics Anonymous September 2021 Hardware
  • More "What could have been"... The Z280.So in chasing up the Loki specs, I happened upon some parallel developments... And had Sinclair gotten to make the Loki, there could have been some i…

    ... decoupled the video clock from the CPU clock then when the ... peripherals.

    Video timing would go a little funny ... difficult to create a suspended clock for timing consistency, and then the ... back in 1986 had some timing issues occurred with the ...
    cj7hawk cj7hawk October 2021 Hardware
  • Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…

    ... depends on the maximum pixel clock rate, the maximum counter count ... the basis of the video timing system. These were used in ...
    1024MAK 1024MAK October 2021 Hardware
  • How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…

    ... fast the code runs
    TIMING EQU 0
    ; this points ... /> quitpressed db 0
    IF TIMING
    last_frame db 0
    clock of course). The player collides ...
    Paradigm Shifter Paradigm Shifter July 2022 Development
  • Emulator compatibility with real SpectrumHi emulator programmers... Having spotted for the last 6 months that my iPAQ is still missing a Spectrum emulator I started typing last tuesday - an…

    ... put more effort into the timing of the emulated computer (I ...
    Anders Anders September 2001 Emulators
  • ? M3732-20RS ?I have eight chips of memory from my old zx spectrum 16k. I?d need to know the pins description of them to use it. The text on the chip is: …

    ... chip (power, data I/O, clock signal, etc...)

    Please ...
    Gento Gento June 2001 Sinclair Miscellaneous
  • Best Monty Mole gameI think this is quite difficult. The top 3 Monty games IMO were Wanted, Monty on the Run and Auf Weidersehn. Too pick the best is quite difficult. …

    ... too often. The classic platform "timing" is well-realised though.
    Vampyre Vampyre May 2002 Games
  • BASIC-code challengeFor the BASIC-coders among us. There is a number that has following aspects. divided by 16 remains 15 divided by 15 remains 14 divided by 14 remain…

    ... fastest BASIC-program wins.
    Timing will be controlled by me ...
    Dr BEEP Dr BEEP July 2002 Sinclair Miscellaneous
  • Best Text Adventure Games?As you may or may not know, I recently got a Psion 3a and have downloaded a Spectrum emulator for it. Unfortunately, the clock in the 3a is too slow …

    ... emulator for it. Unfortunately, the clock in the 3a is too ...
    MattLamb MattLamb November 2002 Games
  • SPIN-Lite (Working Title) test availableHi all, I've been having a break from SPIN, pursuing my original goal of a BASIC interpreter. Well, I took SPIN's main core and hacked it around…

    ... 48k emulation, and has no timing information built in. The goal ...
    Dunny Dunny January 2003 Sinclair Basic
  • What do you reckon the best management game is?Yesterday and today I have been playing Football Manager on an emulator, I play it on an emultator rather than the original, so that I can inrcease t…

    ... that I can inrcease the clock speed, and not wait agaes ...
    thx1138 thx1138 February 2003 Games
  • ANNOUNCE: Fuse 0.6.0 and friendsThe Fuse team announce the release of version 0.6.0 of Fuse, along with version 0.6.0 of the Fuse utilities and version 0.1.1 of libspectrum, the Spe…

    ... />
    * Add routines to get timing information for the various machines ...
    Philip Kendall Philip Kendall April 2003 Emulators
  • ZX Spectrum +3 Strange ProblemI have been trying to fix a floppy disk drive of a +3 by changing the belt in the same way as I have done it so many times in the past. The problem i…

    ... a disk drive problem like timing error in the step motor ...
    Anestis Anestis June 2003 Sinclair Miscellaneous
  • The Spectrum reaches another generation.What a superb day. I recently bought a James Bond +2A Action Pack on eBay for next to nothing, and today invited my four year old nephew to have a go…

    ... were playing Gregory Loses His Clock, and he was really showing ...
    MattLamb MattLamb June 2003 Sinclair Miscellaneous
  • ANN: Spectaculator 5.1Spectaculator is a Sinclair ZX Spectrum emulator for PCs running Windows 95, 98, ME, NT 4, 2000 and XP. Spectaculator emulates the 16K/48K/128K/+2/+…

    ... run demos
    requiring Pentagon timing. Examples include Rage, Eye Ache ...
    Jon Needle Jon Needle July 2003 Emulators
  • Project AY - Contributors NeededNot sure if anyone is aware of my site, hosted here at WoS - Project AY - [url="http://www.worldofspectrum.org/projectay"]www.worldofspectrum.org/pro…

    ... ;

    2. Titling and timing of the tracks in the ...
    bcass bcass July 2003 Sinclair Miscellaneous
  • FIND'EM ALLPlease place on this site some information(sites with downloads,articles) of - "LOST" games (It is games from my forum "Unknown Games For ZX-Spectru…

    ... /> -Killer;
    -Playground;
    -Big Clock (image works'91);
    -Professional ...
    biotoxin biotoxin August 2003 Games
  • Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…

    ... of it, but interrupt-based timing routines are more than my ...
    b00mzi11a b00mzi11a September 2003 Development
  • Hounds of Hell adventure - help!I'm stuck in this adventure game called Hounds of Hell by Peter Clark. I have the metal key, the ornate key, the wine glass, and the photo. I have fo…

    ... -ordinates. Does the grandfather's clock have any use? Where do ...
    Arjun Arjun October 2003 Games
  • Realspectrum latest build (11 Nov)It's only now that I've seen the 'latest build' of Realspectrum for DOS, dating from 11th of November. My question is... Has anyone determined exac…

    ... bit different and that the timing routine is different (i.e ...
    GOC GOC November 2003 Emulators
  • Z80 to TZX Converter !Hey Everyone ! I have a bit of time lately and I coded a little utility that can convert the Z80 snapshot (any version, 48k and 128k supported) to T…

    ... Baud works fine on them). Timing issues ???? - Tapes load perfectly to ...
    Tom-Cat Tom-Cat December 2003 Development
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