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<1…11121314151617…34>
  • Issue 3 expansion connector problemI am having problems with an issue 3 Spectrum, that otherwise works fine, but does not recognize either the Interface 1 or DivMMC/Enjoy (which are bo…

    Thanks, I'll try replacing the Z80!
    Tuukka Tuukka September 2014 Hardware
  • Spectrum 48k ProblemsHi all Got my 48k today but it's playing up abit... First time i turn it on it was like this: [IMG]http://s26.postimg.org/hlg9d3f3d/IMG_20140830_…

    ... a broken trace from the Z80
    [*]All the upper memory ... />
    So I ended up replacing pretty much everything that could ...
    protek protek September 2014 Hardware
  • 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 …

    ... /> ie: software running on a z80, (which is implemented on a ... product, for example an FPGA replacing the Sinclair ULA, all the ...
    Alcoholics Anonymous Alcoholics Anonymous November 2014 Hardware
  • DivMMC Enjoy! Works on 3 of 4 48k Speccy's I own?Hey guys. I have a DivMMC Enjoy! Which is absolutely awesome! Love it to bits. It works perfect on three of my 48k Speccy's, but something isn't rig…

    ... is the case, replacing the CPU with a modern Z80 (they are ...
    Zorn Zorn January 2015 Hardware
  • DivMMC Enjoy! Works on 3 of 4 48k Speccy's I own?Hey guys. I have a DivMMC Enjoy! Which is absolutely awesome! Love it to bits. It works perfect on three of my 48k Speccy's, but something isn't rig…

    ... is the case, replacing the CPU with a modern Z80 (they are ... />

    Fantastic!!!!! Removed old Z80 fitted a socket and then ... is an image of the Z80's in question for reference ... Miner in operation with replacement Z80.....

    [url]http://www ...
    RSwipeCA RSwipeCA January 2015 Hardware
  • I'm writing an Operating SystemOkay this might seem like a bait thread, but I am legitamately interested in figuring out how to write a multi-process system for the ZX Spectrum (no…

    ... fully relocatable code for the Z80 so you want your OS ... /> LD (address2), C
    and replacing the address1 and address2 in ...
    i love the z80s i love the z80s May 2015 Development
  • ZX-Assembler version 0.8 (beta) releasedDear readers, yesterday I've published ZX-Assembler in its first version 0.8. It offers you some interesting features, even if I know there are …

    ... the separation occurs within a Z80 instruction (as the ld hl ... be solved, e.g. the replacing of existing labels would need ...
    clausjahn clausjahn July 2015 Emulators
  • ZX-Assembler version 0.8 (beta) releasedDear readers, yesterday I've published ZX-Assembler in its first version 0.8. It offers you some interesting features, even if I know there are …

    ... editor and replacing them by DEFB instructions. Doing this, intersected Z80 instructions ...
    clausjahn clausjahn August 2015 Emulators
  • 7mhz CPU?One of the things I like about Spectaculator, is that I can zap the clock speed of the emulated CPU up. Doing so makes me wonder about why the desig…

    ... are too slow), the Z80 CPU needs replacing and sometimes the RAM ... chip(s) need replacing...

    [b][i]Mark ...
    1024MAK 1024MAK November 2015 Hardware
  • 7mhz CPU?One of the things I like about Spectaculator, is that I can zap the clock speed of the emulated CPU up. Doing so makes me wonder about why the desig…

    ... are too slow), the Z80 CPU needs replacing and sometimes the RAM ... chip(s) need replacing...[/quote]

    In otherwords ... , RAM, ULA... that's essentially replacing the entire core of the ... , I'm sure the 20MHz Z80 was available then. I guess ...
    Quazar Quazar November 2015 Hardware
  • 7mhz CPU?One of the things I like about Spectaculator, is that I can zap the clock speed of the emulated CPU up. Doing so makes me wonder about why the desig…

    ... are too slow), the Z80 CPU needs replacing and sometimes the RAM ... chip(s) need replacing...[/quote]

    In ... RAM, ULA... that's essentially replacing the entire core of the ... SRAM chip (or chips) and replacing with a modern 32k SRAM ...
    1024MAK 1024MAK November 2015 Hardware
  • 7mhz CPU?One of the things I like about Spectaculator, is that I can zap the clock speed of the emulated CPU up. Doing so makes me wonder about why the desig…

    ... some cases you would be replacing the whole core of the ... aid emulation by slowing the Z80 and the effective speed overall ...
    Quazar Quazar November 2015 Hardware
  • Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …

    ... second drive was incorporated. For replacing a smelly transformer...

    Z80 and Floppy controller. That is ...
    roko roko December 2015 Hardware
  • Vertical Lines Spectrum +3Hi, My Spectrum +3 boots up and shows the following: Grey border with vertical black lines: http://www.sinclairzxworld.com/viewtopic.php?f=22&p=19…

    ... now testing each component and replacing as necessary - he has already ... the socket for the z80 and also the z80 - I will post ...
    ScottC2010 ScottC2010 April 2016 Hardware
  • Introduce yourself[SIZE=3][FONT=Comic Sans MS]This is the thread to stop by & introduce yourself.[/FONT][/SIZE]

    ... sometime in the late 90s, replacing the Z80, and when this didn ...
    Peter Mulholland Peter Mulholland April 2016 Chit chat
  • Introduce yourself[SIZE=3][FONT=Comic Sans MS]This is the thread to stop by & introduce yourself.[/FONT][/SIZE]

    ... regulator, all 74HC logic, CMOS Z80 etc) but still using the ... :)

    Currently experimenting with replacing the TEA2000 video encoder with ...
    Peter Mulholland Peter Mulholland April 2016 Chit chat
  • help with broken +2 greyHello, the other day I was trying to record sounds from my grey +2 "sound" socket to an old cassette recorder. Suddenly the screen went to a solid…

    ... has kindly lent me a z80, ula and rom, which are ... /> I began with replacing each of the z80, rom and ula chips ... , beginning with IC31, I began replacing the rams: ic31 -> 32 ...
    saldali saldali July 2016 Hardware
  • Proportional fontsI've been doing some proportional font drawing, purely on C level at the moment, but it's orders of magnitude slower than I'd want it to be. It's sti…

    ... before RET.

    Simply replacing the scrolling part, but retaining ... /u/28052510/monitor%2Bhobbit_print%20test.z80"]https://dl.dropboxusercontent.com/u ...
    jamorski jamorski October 2016 Development
  • ZX GameDev tools consolidatedHello WoS! It's been a while, yet with a plenty of decent gamedev tools (including new ones!), is there a [i]single/pivot table[/i] or some datash…

    ... a few commands like regular Z80 operations on variables from a ... according to some API specification. Replacing those would allow to produce ...
    Hikaru Hikaru January 2017 Development
  • Repair Zx Spectrum +2 Blackhello there, just found a Zx Spectrum +2 Black edition Issue 1 board that doesnt appear anything on the screen, even led dont power on,i have tes…

    ... .
    There's no point replacing TR1-TR3 at this point ... connector, pin 11 of the Z80, pin 28 of the ROMs ...
    Peter Mulholland Peter Mulholland February 2017 Hardware
  • Send in the ClonesPlease name all the Spectrum clones out there ( I would say I need it back on my desk in 5 minutes , but I will be a bit more generous in this case!…

    ... identical ROM.

    NE Z80 - A Brazilian clone of the ... with a parallel printer interface replacing one of the joystick ports ... lightweight (0.9 Kg) portable Z80-based computer with built-in ...
    Einar Saukas Einar Saukas March 2017 Hardware
  • z80 Helper?When you are programming with z80 do you get 'lost' you are in the middle of making a routine and you can't remember which registers are holding val…

    ... libsrc/_DEVELOPMENT/arch/zx/nirvanap/z80/NIRVANAP_ENGINE.asm.m4#L385"]an ... libsrc/_DEVELOPMENT/arch/zx/fase/z80/FASE_ENGINE.asm.m4#L34"]ideal ... libsrc/_DEVELOPMENT/arch/zx/fase/z80/FASE_ENGINE.asm.m4#L72"] ... a readable level. "I'm replacing 'ld a,80' with 'load ...
    Alcoholics Anonymous Alcoholics Anonymous April 2017 Development
  • ZX Nuvo 128..Hi There, I have built the ZX Nuvo 128 by Superfo, but it has a problem. The machine is working, but the video signal is completely bonkers. I've …

    ... your particular Nuvo.
    2) Replacing U39 with TI 74AS175AN (or ... fast enough to drive the Z80 clock )

    With current ...
    screemer screemer June 2017 Hardware
  • Repair ZX Spectrum +2 black issue 1Hi all, after a long time i will try to repair a ZX Spectrum +2 black i found the last days i know for sure that CPU is damaged (already repla…

    ... you could eliminate ROMs by replacing them. Are you sure that ... ?

    also yes the z80 is ok i have tested ...
    xaris_sm xaris_sm June 2017 Hardware
  • ROM emulation in softwareHi, first of all -- I only have shallow / uni knowledge of hardware, electronics, and physics. So forgive me for asking things that are out of that …

    ... the possibilities of hooking into Z80 memory reads and writes.
    replacing ROM's NMI hook to ...
    tstih tstih July 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…

    ... grey) every time, then the Z80 CPU is either not able ... ).

    Then, maybe resume replacing the lower RAM. But in ...
    1024MAK 1024MAK October 2017 Hardware
  • ZX Spectrum 128k Toastrack with horizontal black and white barsSo I found a working 128k toastrack on a local auction site. After playing around with it for a few days I noticed the sound of the AY chip was reall…

    ... + 470)[/quote]
    I suggest replacing [url="https://www.worldofspectrum.org ... okay. If it’s the Z80 that kicked the bucket, it ...
    Ast_A_Moore Ast_A_Moore May 2018 Updates
  • The Different Approaches To Upgrading the ZX Spectrum from 16K to 48K This is probably something that has been covered before . I will take a look to see if I can find anything on WOS

    ... link is needed near the Z80, need to check my notes ... about these is if your replacing previously fitted faulty ram, then ...
    Your Spec-chum Your Spec-chum October 2019 Hardware
  • Spectrum 128k advice neededHi, I'm new to this forum and the spectrum world. I have this spectrum "toastrack" that was working fine until today. It doesn't boot anymore, it s…

    ... time.

    See if replacing capacitor C27 (1uF) helps. While ... in mind due to the Z80 your result may be a ...
    1024MAK 1024MAK August 2020 Hardware
  • Speccy 4A board problemHi all. I was hoping for some help with my Speccy (with 4A Board) before I send it off for repair. When I power it on all looks fine (i.e. copyright …

    ... it could also be the Z80 stack getting corrupted due to ... than the others, and try replacing them one by one.
    1024MAK 1024MAK September 2020 Hardware
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Latest Posts

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    Paradigm Shifter on 12:49AM
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    John Elliott on April 21
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