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<1…14151617181920…34>
  • ZX Spectrum Issue 4S composite video fuzzy (horizontal blur)Dear people of WoS, Thank you very much for taking the time to read. I have an Issue 4S I recently acquired and planned to fix up as a gift for a…

    ... .67v (4)
    Reseated the ULA (6C001E-7 I don’t ...
    - IC 14 LM1889N
    - Z80 socketed
    Hunt for any ...
    handsfelloff handsfelloff January 2018 Hardware
  • The I register pointing to $40–$7f causes ULA snow and a crash. Or does it?I have heard it from numerous sources, including a few members of this forum, that 128K/+2 machines crash if the I register points to a range of $40–…

    ... no avail. I get the ULA snow, sure thing, but that ...
    Ast_A_Moore Ast_A_Moore February 2018 Development
  • New colour palette for 16K/48K/+ machines, based on ULA YUV voltagesI’ve made a colour palette for 16K/48K/+ machines, based on the YUV voltage tables in Chris Smith’s book The ZX Spectrum ULA. This colour palette …

    ... ’s book The ZX Spectrum ULA.

    This colour palette ... use the original Sinclair Ferranti ULA, 5C102E, 5C112E or 6C001E. It ...
    rga24 rga24 February 2018 Emulators
  • Broken Issue 2 - likely culpritsI've just got hold of an issue 2 spectrum with an interesting layout (heatsink is vertical and goes down to the speaker, some variable resistors and …

    ... normal resistors soldered around the z80). It boots into the initial ... seconds. I'm assuming z80 and ULA are working for it to ...
    dave18 dave18 March 2018 Hardware
  • 6C001EE-7 ULA A ULA ID I haven't seen before, possibly a misprint? Found on an issue 6A board in a rubber key 48k. Any ideas? [img]https://pbs.twimg.com/media…

    A ULA ID I haven't seen before, possibly a misprint? Found on an issue 6A board in a rubber key 48k. Any ideas?

    [img]https://pbs.twimg.com/media/DbYC8aNXkAANAm4.jpg:large[/img]
    impomatic impomatic April 2018 Hardware
  • Poll: Common Z80 Cross-Assemblers in use / WUDSN IDEHi there, my name is Peter Dell/JAC! and I'm the author of WUDEN IDE, a cross-platform IDE for 6502 based systems like Atari, Apple and C64, htt…

    ... a numer of requests for Z80 support and ZX Spectrum and ...
    JAC JAC June 2018 Development
  • Testing an Interface 1As title, is there an easy way on how can I test to see if its functional or not please ? :) Please bear in mind I do not have *any* microdrives n…

    ... /> I recall a faulty Z80 or ULA can make it appear broken ...
    spider spider July 2018 Hardware
  • where can i get ula's from?i want a nebula ula from retroleum but they have sold out. i also googled it and had a look on ebay and i cant even find any normal ula's either.

    i want a nebula ula from retroleum but they have sold out. i also googled it and had a look on ebay and i cant even find any normal ula's either.
    digital digital October 2018 Wanted
  • Spectrum 48K / composite mod / LCD TV: voltages out of the ULAHello Spectrum World I have juste bought again my first computer on ebay... a Speccy 48k issue 2 with a 5C112E-2 ULA. Just had to replace TR4 and …

    ... 2 with a 5C112E-2 ULA. Just had to replace ... maybe a problem in the ULA could cause b) or ... great book "The ZX Spectrum ULA: How to design a ... br /> Patrick

    My ULA Y output:
    [img]https ... ://i.postimg.cc/HxDsHvPC/ULA-Y.jpg[/img]
    ...
    paf paf November 2018 Hardware
  • Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …

    ... case if the 6502 and Z80 performed much the same per ... a bit better than the Z80.


    The BBC ...
    dmsmith dmsmith December 2018 Hardware
  • [mac os x, Fuse] Thumbnail icon of TZX, TAP and z80 files in Finder goneFor a long time I could see thumbnail previews of TZX, TAP and z80 files in Finder. I'm sure FUSE installed this nice feature years ago. Recently for…

    ... previews of TZX, TAP and z80 files in Finder. I'm ... working - I see only generic "z80 file", "TAP file" icon. Does ...
    Kuba Adamowicz Kuba Adamowicz February 2019 Emulators
  • ZEsarUX Beta 7.2-RCHi I have uploaded a new ZEsarUX Beta version: 7.2 Release Candidate! Next version will be final stable :) You can download it from: https://g…

    ... help windows

    Added Z80 assembler
    Added setting to ... (in my machine) when only ULA and/or Tiles enabled
    chernandezba chernandezba March 2019 Emulators
  • ZEsarUX stable 7.2Hi! I have uploaded a new stable ZEsarUX version 7.2! You must go to the Releases section on the GitHub project to download It, as usual: htt…

    ... help windows

    Added Z80 assembler
    Added setting to ... (in my machine) when only ULA and/or Tiles enabled
    chernandezba chernandezba April 2019 Emulators
  • Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…

    ... greatly appreciated.

    [b]ULA heatsinks[/b]
    As the ... a heatsink to the the ULA without needing to desocket it ... , having lost both tension and thermal compound adhesion. I was planning ... 'll need to pull the ULA out of the +2 in ...
    chrisgreen chrisgreen May 2019 Hardware
  • New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…

    ... utility currently utilises the popular z80 format (v1, v2 or v3 ... registers as defined in the z80 snapshot. You can even add ... , which is much better than z80 compression but it could be ...
    TomD TomD May 2019 Development
  • Spectrum and Z80 emulators with Python APIHello everybody, It may be the right time to create a topic for these two emulators. They are not at the initial release point yet, but might be w…

    ...
    * https://github.com/kosarev/z80

    As of today ... part is capable of running .z80 and .rzx files. It is ... next step was getting a Z80 emulator that is flexible enough ...
    kosarev kosarev May 2019 Emulators
  • AdvancedAdvertisment for old-games.zilog-z80-spectrum-We transformn z80gme into funny-videos.More sinus and cosine on large wide and low resolutions.Do you like these movies? [url="https://youtu.be/MJTR…

    ... /MJTRDgdpSUU?t=50"]Syntax tap1989 z80[/url]
    [url="https://youtu ... /c7r_eQl9drI"]Relax yourBrain with Chronos.z80[/url]
    [url="https://youtu ...
    d2010 d2010 September 2019 Announcements
  • How do emulators make code appears as running at 3.5Mhz?Decent Z80 emulators on github return t-states after executing an instruction, giving you the ability to emulate Speccy relatively well. But there ar…

    Decent Z80 emulators on github return t- ... 23 t-states), isn't ULA painting during the instruction too ...
    tstih tstih October 2019 Development
  • lcc z80Reading through Hansen and Frasier's "A Retargetable C Compiler: Design and Implementation" ( plenty of time on public transport ) about the lcc comp…

    ... the GameBoy crowd created a Z80 back end for it.
    tstih tstih October 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…

    ... x,y on ula layer
    -optimized ula,lores render routines ... and applies to .sna and .z80
    Improved curses driver: now ... resolution
    Improved accurate Z80 timing: IM mode 0 is ... Fixed loading and saving +3 .z80 snapshots
    Fixed placing menu ...
    chernandezba chernandezba November 2019 Emulators
  • ZEsarUX 8.1 stableHi! I've uploaded a new ZEsarUX 8.1 stable version. Go to the github released webpage to download it: https://github.com/chernandezba/zesaru…

    ... official SD images
    -optimized ula,lores render routines: 2% less ... -added scroll x,y on ula layer
    -added 1-bit ... /> Fixed loading and saving +3 .z80 snapshots
    Fixed placing menu ... /> -fixed "bit 7 = Disable ULA output (soft reset = 0)" on ...
    chernandezba chernandezba February 2020 Emulators
  • Of course, when the M1 line of the Z80 CPU is failing, the Z80 CPU must be replaced![quote]Of course, when the M1 line of the Z80 CPU is failing, the Z80 CPU must be replaced![/quote] Err, why? If you are trying to use an interfa…

    ... line of the Z80 CPU is failing, the Z80 CPU must be ... or expansion that needs a Z80 MPU with a working /M1 ...
    1024MAK 1024MAK March 2020 Hardware
  • Wanted: Reichswald by MW Gamesworld .tap/.z80Hi all, I'm looking for a tap/z80 file of MW Gamesworld's Reichswald for a personal project I want to undertake. I'm sure that there's a copy out th…

    Hi all,
    I'm looking for a tap/z80 file of MW Gamesworld's Reichswald for a personal project I want to undertake. I'm sure that there's a copy out there somewhere. I'd be grateful if someone would forward it to me.

    Cheers,
    J.
    LevelUp LevelUp June 2020 Wanted
  • Save 48k SNA from 128k Z80 snapshot?I have been doing RZX recordings of text-based adventure games. In the case of games made with GAC (Graphic Adventure Creator), where a map and solut…

    ... are only available as 128k Z80 snapshots, which prevents me from ...
    equinox equinox June 2020 Emulators
  • uMIA: Z80 Analyst - Sesomsoft[b]Full Title:[/b] Z80 Analyst [b]Also known as:[/b] [b]Year:[/b] 1985 (Loading screen) / 1986 (Tape label) [b]Company:[/b] Sesomsoft (Herbert Ba…

    [b]Full Title:[/b] Z80 Analyst
    [b]Also known ... ://www.dropbox.com/s/kcm5egyaz8q9pvg/Z80%20Analyst.zip?dl=0
    Frankie Frankie August 2020 MIA/STP/SDP
  • 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 …

    ... as it goes to the Z80 and cut the trace. I ... on one side to the ULA and the other side is ... (in the same way the ULA does AFAIK). The switch sometimes ...
    gazj82 gazj82 September 2020 Hardware
  • New Utility Z80onMDR - Transfer Z80 snapshot to Microdrive CartridgesWith the growing popularity of the excellent vDrive [url]https://vdrivezx.com/vdrivezx/[/url] I've adapted one of my utilities to create Microdrive …

    ... /> | Usage: Z80onMDR [global options] snapshot.z80 [snapshot settings]
    |
    | [ ... activated if more than one z80 snapshot specified, example:
    | ... Z80onMDR snapshot1.z80 -s screen1.scr snapshot2.z80 Games01
    | which ...
    TomD TomD September 2020 Brand new software
  • The ZX Spectrum ULA bookFound a copy of the ZX Spectrum ULA book by Chris Smith that I've never read. This is a new book that was given to me years ago and I've never got ro…

    ... copy of the ZX Spectrum ULA book by Chris Smith that ...
    Mr Millside Mr Millside October 2020 Sales
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  • Z80, TZX and TAP formatsHi again <br /> I?ve seen these three formats as the most common of all. The doubt is... Which is the best of them? What are the differences between …
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