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<1…16171819202122…34>
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... each instruction, but I can fix this problem myself.[/QUOTE]
    ULA port then you emulate a ... ULA port write (beeper and border ...
    Dunny Dunny July 2011 Emulators
  • writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…

    ... it. If it's a ULA port then you emulate a ... ULA port write (beeper and border ... thing you will need to fix is that the ROM should ...
    Philip Kendall Philip Kendall July 2011 Emulators
  • Weird 'semi-crash' I used to be able to make the 48k speccy do.I've always wondered about this (but I seem unable to recreate it at the moment). I used to be able to get the Speccy to display some weird screen o…

    ... .zxprojects.com/index.php/the-fix-a-spectrum-blog/29-the ... any value output to the ULA ports, so you can't ...
    na_th_an na_th_an July 2011 Sinclair Basic
  • Spectrum +3 suspected memory faultHi, I've been using my +3 for the first time in a while and found that some games have problems with the display becoming corrupted and sometimes cr…

    ... 's nothing wrong with the ULA/ASIC on this machine.
    fix the +3 with the suspected ...
    JohnH JohnH July 2011 Hardware
  • Modern gaming conventions that were in Spectrum games?Out of interest, were any of these things that we take for granted in games nowadays, ever in any Spectrum games? 1. Multiple weapons that you can f…

    ... , realistic real-time shadows, rain, snow, heat haze, or light sourcing ... /> [quote]
    3. Patches to fix game bugs? I don't ... the user to enter to fix Jet Set Willy's more ...
    rich_chandler rich_chandler August 2011 Games
  • Modern gaming conventions that were in Spectrum games?Out of interest, were any of these things that we take for granted in games nowadays, ever in any Spectrum games? 1. Multiple weapons that you can f…

    ... , realistic real-time shadows, rain, snow, heat haze, or light sourcing ... />

    3. Patches to fix game bugs? I don't ... the user to enter to fix Jet Set Willy's more ...
    Wookiee Wookiee August 2011 Games
  • Modern gaming conventions that were in Spectrum games?Out of interest, were any of these things that we take for granted in games nowadays, ever in any Spectrum games? 1. Multiple weapons that you can f…

    ... , realistic real-time shadows, rain, snow, heat haze, or light sourcing ... />

    3. Patches to fix game bugs? I don't ... the user to enter to fix Jet Set Willy's more ...
    Wookiee Wookiee August 2011 Games
  • Spectrum 128k+ Toastrack lower Beeper level?Does anyone know the easiest way of matching the AY and beeper levels? I'm guessing perhaps the easiest thing to do is lower the beeper line rather t…

    ... (they are joined) on the ULA.

    So to ... increase the resistor by the ULA to a higher value (maybe ... of the middle of the ULA).

    I chose ... other change I made to fix the RGB output and route ... help! I hope to still fix the sound on my +3 ...
    RobeeeJay RobeeeJay August 2011 Hardware
  • Composite ProblemHi everyone :smile: I have done the composite modification on a few of my rubber key Spectrum's, and I've had no problems with these on my old porta…

    ... .

    Chris Smith's ULA book shows it in detail ... ). The quick answer is: you fix it by getting a television ...
    Winston Winston September 2011 Hardware
  • Spectrum Serial Numbers Wanted!![b]This post updated Sept. 26, 2013[/b] As far as I know, the serial numbering system for the Spectrum has never been fully worked out. For the p…

    ... -270477 (green)

    Ferranti ULA 6C001E-6 8347

    ULA 1281 is one of the ... the klutzed ROM without any fix.
    absinthe_boy absinthe_boy October 2011 Sinclair Miscellaneous
  • Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…

    ... ;p=631234]dead cockroach[/url]" fix which was applied to Issue ... [url=http://www.zxdesign.info/]ULA book[/url]...

    [quote ...
    gasman gasman October 2011 Hardware
  • Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…

    ... ;p=631234]dead cockroach[/url]" fix which was applied to Issue ... [url=http://www.zxdesign.info/]ULA book[/url]...


    ula which doesnt need the fix. Wierd.
    spodula spodula October 2011 Hardware
  • Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…

    ... had an old ULA which required the fix by the dead ... cockroach and then later the ULA ... the 6C ULA didn't require the fix and still ... code of 8442 on the ULA, presumably the manufacture date ... which means the original ULA must have been replaced at ...
    cmonkey cmonkey October 2011 Hardware
  • Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…

    ... thats a 6C ula which doesnt need the fix. Wierd.[/QUOTE]< ... br /> [QUOTE=cmonkey;570993]My ULA is socketed, could it be ... had an old ULA which required the fix by the ... dead cockroach and then later the ULA ... the 6C ULA didn't require the fix and still ...
    RetroTechie RetroTechie October 2011 Hardware
  • Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…

    ... that is, other than the ULA and the ROM. Even the ... and 001-085038 had a ULA dated 8240, both of ... require the dead cockroach fix or did the ULA bug only affect ... mine originally had a 5C112E ULA.

    I'm ... what I've read the ULA bug only affected INKEY$ ...
    cmonkey cmonkey October 2011 Hardware
  • Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…

    ... of your amazing ZX Spectrum ULA book just dropped onto my ... Spectrum with the dead cockroach fix before like mine appears to ...
    cmonkey cmonkey October 2011 Hardware
  • Dead Spectrum SocietySo I'm getting back into real Sinclair computers rather than emulators. During the summer months I was lucky enough to buy a working ZX81 and was giv…

    ... bespoke extra parts like the ULA, the CPU, the coil and ... else (like RAM) I just fix, and if you don't ...
    Spirantho Spirantho October 2011 Hardware
  • Dead Spectrum SocietySo I'm getting back into real Sinclair computers rather than emulators. During the summer months I was lucky enough to buy a working ZX81 and was giv…

    ... bespoke extra parts like the ULA, the CPU, the coil and ... else (like RAM) I just fix, and if you don't ... tempting. I'm sure the ULA, CPU and ROM are fine ...
    absinthe_boy absinthe_boy October 2011 Hardware
  • Guide price for a 48k rubberkeys from you lot?My trusty Spectrum (an Issue 3, working since late 1983 or early 1984) has finally upped and carked on me :-( Now I could hit ebay or the local boot…

    ... destroy chips), and of course fix your Spectrum.
    I charge ... membrane and of course the ULA. I actually had one once ... where the ROM, CPU and ULA had all gone bad!
    fix it easily when you get ...
    Spirantho Spirantho November 2011 Wanted
  • Guide price for a 48k rubberkeys from you lot?My trusty Spectrum (an Issue 3, working since late 1983 or early 1984) has finally upped and carked on me :-( Now I could hit ebay or the local boot…

    ... destroy chips), and of course fix your Spectrum.
    I charge ... membrane and of course the ULA. I actually had one once ... where the ROM, CPU and ULA had all gone bad!
    fix it easily when you get ...
    rich_chandler rich_chandler November 2011 Wanted
  • Guide price for a 48k rubberkeys from you lot?My trusty Spectrum (an Issue 3, working since late 1983 or early 1984) has finally upped and carked on me :-( Now I could hit ebay or the local boot…

    ... chips), and of course fix your Spectrum.
    I ... membrane and of course the ULA. I actually had one ... the ROM, CPU and ULA had all gone bad!
    fix Commodore equipment? Hopefully none ...
    Also, can you fix the appalling sound on a ...
    Alien 8 Alien 8 November 2011 Wanted
  • Guide price for a 48k rubberkeys from you lot?My trusty Spectrum (an Issue 3, working since late 1983 or early 1984) has finally upped and carked on me :-( Now I could hit ebay or the local boot…

    ... interest, do you also fix Commodore equipment? Hopefully none ... [/quote]

    I can fix Commodore, sure, but it can ... ULAs... there is a fix though, I need to ... />
    Also, can you fix the appalling sound on a ... parts BUT if the ULA is dead then that ...
    Spirantho Spirantho November 2011 Wanted
  • Guide price for a 48k rubberkeys from you lot?My trusty Spectrum (an Issue 3, working since late 1983 or early 1984) has finally upped and carked on me :-( Now I could hit ebay or the local boot…

    [QUOTE=Spirantho;577857]I can fix Commodore, sure, but it can ... some ULAs... there is a fix though, I need to look ... plus parts BUT if the ULA is dead then that part ...
    Alien 8 Alien 8 November 2011 Wanted
  • What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…

    ... Texas Instruments gate array as ULA, and its internals have still ... far different than the Sinclair ULA. To start, the VR interrupt ... is triggered when the "ULA" is about to begin to ... .zxprojects.com/index.php/the-fix-a-spectrum-blog/29-the ...
    mcleod_ideafix mcleod_ideafix November 2011 Hardware
  • ZX81 Dark screen, could it be the ULA?Trying to get a ZX81 going for a mate of mine, already replaced the membrane (Cheers Rich!) but now its the old "very dark screen" problem, probably …

    ... " problem, probably caused by the ULA and fixable with the composite ... be a damaged ULA that his mod may not fix, could this ... : My implication being that the ULA is perfectly fine and not ...
    ccowley ccowley November 2011 Chit chat
  • ZX81 Dark screen, could it be the ULA?Trying to get a ZX81 going for a mate of mine, already replaced the membrane (Cheers Rich!) but now its the old "very dark screen" problem, probably …

    ... would say its the known ULA issue, I have one of ... regular composite modification doesn't fix it unless its another kind ... (Philips).

    If your ULA's model fits the known ...
    gtsamour gtsamour November 2011 Chit chat
  • FPGA ZX SpectrumJust wonder: how many of you would buy "new hardware based" and "in case" ZX Spectrum based on FPGA? ;) [url]http://www.fpgaarcade.com/[/url]

    ... emulate faithfully the real 48K ULA (it's based on Chris ... Smith's book); it supports ULA plus (64 color mode), emulates ... time with loading stripes). The Snow Effect bug is also faithfully ...
    adorigatti adorigatti January 2012 Hardware
  • New Game! Maritrini, Freelance Monster SlayerAfter experiencing the sweet taste of success, Maritrini woke up one fine day in a mess of bed sheets and with the biggest hangover she could remembe…

    Hello, the game has been tested on a real +2A and it worked fine. Anyhow, I'll look into a fix for that.

    EDIT: By the way, is there any emulators where I can test this snow effect? I've produced a fix but don't know how to test it.
    na_th_an na_th_an January 2012 Brand new software
  • New Game! Maritrini, Freelance Monster SlayerAfter experiencing the sweet taste of success, Maritrini woke up one fine day in a mess of bed sheets and with the biggest hangover she could remembe…

    ... , I'll look into a fix for that.[/QUOTE]

    snow effect. 48, 128k+ and +2 ... can test this snow effect? I've produced a fix but don ... versions emulate it too. The fix only needs to set the ...
    Metalbrain Metalbrain January 2012 Brand new software
  • New interface for ZXThis is my old (2004) unfinished project of internal interface for ZX Spectrum 128+2: ([url]http://velesoft.speccy.cz/hardware_in_development.htm[/u…

    ... multicolors is designed for Pentagon ula and in ZX+2 is ... ULA with different screen timing, then ... compatibility with russian software. Also snow/rain effect is switchable in ...
    velesoft velesoft February 2012 Hardware
<1…16171819202122…34>

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