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<1…20212223242526…34>
  • ZXBaremulator v1.2Hi!, I've released ZXBaremulator v1.2. The new release add a few features and removes a limit. :) The new version can be downloaded from projec…

    ... ="zx81;922662"]I need to test these configuration, because the emulator ... Spectrum emulation runs on another CPU and this starts before the ... presence check. The CPU-0 halts but the CPU-1 is running ... +/Zero only have one CPU, so the CPU halts before the Spectrum ...
    zx81 zx81 September 2017 Emulators
  • ZXBaremulator v1.2Hi!, I've released ZXBaremulator v1.2. The new release add a few features and removes a limit. :) The new version can be downloaded from projec…

    ... ="zx81;922662"]I need to test these configuration, because the emulator ... Spectrum emulation runs on another CPU and this starts before the ... presence check. The CPU-0 halts but the CPU-1 is running ... +/Zero only have one CPU, so the CPU halts before the Spectrum ...
    Pegaz Pegaz September 2017 Emulators
  • ZXBaremulator v1.2Hi!, I've released ZXBaremulator v1.2. The new release add a few features and removes a limit. :) The new version can be downloaded from projec…

    ... /> bff0a16986c23b821e5591ca3243d42a kernel7.img

    Test yourself the beta4 version. The ... is running in a different CPU than interrupt handling (USB or ...
    zx81 zx81 October 2017 Emulators
  • 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…

    ... gun, if you have any test equipment, it would be helpful ... reset pin.
    Is the CPU clock making it through to ...
    1024MAK 1024MAK October 2017 Hardware
  • 50 Hz / 60 Hz switch in Timex Computer 2068I'm not sure if this is common knowledge, I've certainly never read about it online, though it may be documented in Portuguese or Polish. There is a…

    ... . A lot of games are CPU bound and just run as ... .[/quote]

    Try to test on demo. Most likely 100 ...
    Black_Cat Black_Cat October 2017 Hardware
  • What's going on inside this ZX Spectrum? [Newbie]Hello folks Last year I got hold of a ZX Spectrum. At the time it appeared to boot up fine, but more recently when I've tried to boot up I've had…

    ... an expansion that has a test program in a ROM (or ... . Then as long as the CPU is working, the ULA is ... , control and data busses, the test program can check the RAM ...
    1024MAK 1024MAK October 2017 Hardware
  • Replacing lower RAM 4116 ZX Spectrum 48k - desoldering advice please?A long post, but interesting pictures perhaps. :) I'd like some advice: (also apologies I think I picked the wrong 'Hardware' category for this, plea…

    ... :
    Use a multimeter to test the +5V, the +12V and ... ) every time, then the Z80 CPU is either not able to ...
    1024MAK 1024MAK October 2017 Hardware
  • Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …

    ... attempt showed up a CPU error so it had ... time I "rattled" the CPU around in its slot just ... check for correct seating of CPU helps). Prior to redoing ...
    The use of a TEST RIG/ STAND helped as everything ... So in the end the TEST STAND was marginally useful ...
    harriusherbartio harriusherbartio October 2017 Hardware
  • Spectrum +2 grey ear mod?Is it possible to turn the sound port on the back of a grey Spectrum +2 into an ear input? I know it's possible for the black +2 but I can't find muc…

    ... bit of machine code to test that the RAM banks are ... any memory within the current CPU map.

    [b][i ...
    1024MAK 1024MAK November 2017 Hardware
  • Replacing lower RAM 4116 ZX Spectrum 48k - desoldering advice please?A long post, but interesting pictures perhaps. :) I'd like some advice: (also apologies I think I picked the wrong 'Hardware' category for this, plea…

    ... /or the use of some test equipment, it's still not ... does look like the Z80 CPU is not running the code ...
    1024MAK 1024MAK November 2017 Hardware
  • Need help from people with real 128/black +2 and grey +2A/+2B/+3.Please, if you have time and inspiration, run [url="https://www.worldofspectrum.org/forums/discussion/55518/test-of-screen-switching-timings"]this t…

    ... the clock edge that the CPU sees.

    It's ... to do with weiv's test, but I can't think ...
    guesser guesser November 2017 Hardware
  • Troubleshooting my +2To put this in context: a while back (i.e. late last year and earlier this year) I was looking to put together a compilation of modern Spectrum games…

    ... Spectrums contain a NEC D780 CPU (or another "second sourced" Z80 ... CPU. So, just because it is ... good in coming up with test programs, such as the one ... there any program that can test the processor directly (say via ...
    The Mighty Dopethrone The Mighty Dopethrone November 2017 Hardware
  • Troubleshooting my +2To put this in context: a while back (i.e. late last year and earlier this year) I was looking to put together a compilation of modern Spectrum games…

    ... as a real Zilog Z80 CPU.

    This ... work out which NMOS CPU it is running on.< ... to tell if the CPU is an NMOS or ... instruction works differently). But the CPU that you have is an ... the web for "Z80 undocumented" test programs...

    [b ...
    1024MAK 1024MAK November 2017 Hardware
  • 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…

    ... you tried a different Z80 CPU? The best method is to ... times, so I could test Coin-Op Hits Out Run ... as a program that can test the Z80 to see ... would also allow me to test the NEC clone in my ... />
    Meanwhile, I may now test my Modern Games Compilation with ...
    The Mighty Dopethrone The Mighty Dopethrone December 2017 Hardware
  • 48k packed up after cap changeHi all, I'm relatively new to the Sinclair world, my 8-bit repairs in past was lurking in the dark sides of Acorn, Amstrad and Commodore! I've got…

    ... the video signal). The Z80 CPU is not processing instructions from ... broken connection), or either the CPU or ROM are defective.
    test the +12V and the -5V ... multimeter, do you have any test equipment? Also, do you have ...
    1024MAK 1024MAK December 2017 Hardware
  • 48k packed up after cap changeHi all, I'm relatively new to the Sinclair world, my 8-bit repairs in past was lurking in the dark sides of Acorn, Amstrad and Commodore! I've got…

    ... the video signal). The Z80 CPU is not processing instructions from ... broken connection), or either the CPU or ROM are defective."
    At the 4116 DRAM chips, test the +12V and the -5V ... of circuit?

    My test equipment consists of a multimeter ...
    dozey_dustman dozey_dustman December 2017 Hardware
  • 48k packed up after cap changeHi all, I'm relatively new to the Sinclair world, my 8-bit repairs in past was lurking in the dark sides of Acorn, Amstrad and Commodore! I've got…

    ... test ROM can help diagnose memory problems, but only if the CPU ...
    1024MAK 1024MAK December 2017 Hardware
  • 48k packed up after cap changeHi all, I'm relatively new to the Sinclair world, my 8-bit repairs in past was lurking in the dark sides of Acorn, Amstrad and Commodore! I've got…

    ... -diagnostics/wiki/Firmware"]Memory test ROM [/url]. The CPU needs to be ...
    1024MAK 1024MAK December 2017 Hardware
  • 1987-2017Here we are, with our tradional thread about games released thirty years ago, where we can contemplate how bad they have aged, how bad they [i]alread…

    ... a bit of a memory test, if you know the order ... said. You can play vs CPU, vs, a friend, or do ...
    dm_boozefreek dm_boozefreek December 2017 Games
  • Need Some Basic HelpHi all, I’ve decided to give programming in Spectrum Basic a go again (bit of nostalgia trip!) and I’m trying to develop a CYOA style game. How…

    ... I decided to run a test and generate some simple code ... emulation display and then the CPU memory window opens showing me ...
    TidusRenegade TidusRenegade April 2018 Sinclair Basic
  • Need Some Basic HelpHi all, I’ve decided to give programming in Spectrum Basic a go again (bit of nostalgia trip!) and I’m trying to develop a CYOA style game. How…

    ... I decided to run a test and generate some simple code ... emulation display and then the CPU memory window opens showing me ...
    AndyC AndyC April 2018 Sinclair Basic
  • Retro Virtual Machine is out!Fantastic emulator Retro Virtual Machine (@retrovm) is out today. It can emulates Amstrad/Sinclair models range. Give a try! http://www.retrovirt…

    ... the Disassembly view in the CPU window, which didn't ... if you STOP the CPU debugging first (or hit ... if you stop the CPU debugging first. But I ... /> [/quote]

    To test the assembler (I will document ... this shortly) make a test file with by example:< ...
    jcgamestoy jcgamestoy December 2018 Emulators
  • Fuse/SPIN vs Spectaculator border timingsHello, I'm trying to figure out at which moments the 48K ULA samples the current border color into its internal latch. To do that I wrote a small …

    ... of weeks. Will give the test a try on them. ... the source code of the test available?

    Back ... 's another thing about my test that looks strange. The @ ... which is 64 x 224 CPU clock cycles or 14336 T ... here is that in my test the OUT instruction at ...
    kosarev kosarev April 2019 Emulators
  • Brain 8I am glad to present my new "experiment" in Sinclair Spectrum 48K BASIC. https://drive.google.com/file/d/17_wCFWaAl5diIVt3rPLTbKhxDmPmYmOs/view?us…

    ... integer maths directly using the CPU registers where possible, rather than ... so nice Artillery game. (To test it: BREAK the game, type ...
    patters patters April 2019 Brand new software
  • +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…

    ... AY may not crash the CPU, but if it fried in ... there’s a way to test the ROMs by reading them ...
    Ast_A_Moore Ast_A_Moore May 2019 Hardware
  • Keeping up to date with PC builds.I only do PC builds infrequently and I have stopped reading Micro-Mart so my abilities in the area can languish pretty quickly. But if it is new i…

    ... ) INTEL CPU chip . I decided to use the Lian Li Test stand ...
    harriusherbartio harriusherbartio August 2019 Chit chat
  • 48K Issue 2 RAM issuesI have 48K issue 2 board (I've checked, the upper memory is present!). It's not very well. I've not attempted to diagnose one before, so please bear …

    ... upper RAM. Then asking the CPU to read back the value ... is fine.

    The test that the machine does when ... a full memory test. It is rather, a test to find out ...
    1024MAK 1024MAK August 2019 Hardware
  • Fuse/SPIN vs Spectaculator border timingsHello, I'm trying to figure out at which moments the 48K ULA samples the current border color into its internal latch. To do that I wrote a small …

    ... that effectively means that a CPU cycle can change the ... .com/kosarev/zx/blob/8909778196d16add9f003e5eeba3622728b8c176/test/border_timing/border_timing.asm
    < ... is obvious enough that a CPU cycle fired up at ... which is 64 x 224 CPU clock cycles or 14336 ...
    kosarev kosarev October 2019 Emulators
  • Can someone run this test program on a real Spectrum 48K?I've knocked up a small test program just to satisfy my emulation OCD if someone with a real 48K Spectrum can spare a couple of minutes to run it.? …

    ... the display generation and the cpu. It's the same in ... the thread for azesmbog's test program. The ula tests except ...
    Alcoholics Anonymous Alcoholics Anonymous November 2019 Emulators
  • Can someone run this test program on a real Spectrum 48K?I've knocked up a small test program just to satisfy my emulation OCD if someone with a real 48K Spectrum can spare a couple of minutes to run it.? …

    ... /> Looks very different to first test on "Real Hardware 48k Speccy ... sound, this is still a test of timings, not a ... the Chip: "ZiLOG Z84C0020PEC Z80 CPU 0536 GZ"
    [/quote]
    Microprocessors - MPU 20MHz CMOS CPU XTEMP
    in cmos processors ...
    azesmbog azesmbog November 2019 Emulators
<1…20212223242526…34>

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