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<1…18192021222324…34>
  • 48k Out of memoryIv just had a 48k Speccy arrive today. The keyboard wasnt working right so I changed that. Now when I tried to load Cyclone it started to load ok fo…

    ... :sad:[/QUOTE]

    bad upper ram? meaning that it's effectively ... and peek to test the ram, I'm sure someone will ...
    guesser guesser November 2010 Hardware
  • ZX48K: KILLING keyboard membrane?Hi. My friend - JAD - decided to get back from C64 to ZX Spectrum 48K after some break (that's the man who coded this program [url]http://www.pouet…

    1. Likely, lower RAM and/or the internal switch ... data sheet for the 4116 RAM and test the voltages to ... /> 2. Less likely, but possible: bad ULA. See an earlier post ...
    Winston Winston November 2010 Hardware
  • I wonder how many still goingThere is always a healthy stock of 48k rubber keyed speccys on eBay. However whats the guess on the amount world wide that are still working/used? +…

    ... ones all showing symptoms of bad lower RAM - well, except the one ...
    Winston Winston December 2010 Sinclair Miscellaneous
  • Poll: The best spectrumIm putting this up as weve had quite a lengthy discussion discussing the highs and lows of all spectrum models so heres a poll for personal preferanc…

    ... so compatible with 48k titles, bad hardware compatibility.
    +3: Disk ... /> Try and keep up! 128K = bad compatibility. +2B with Spectrum SE ... model. Since there's no RAM connected in the top 32K ...
    chev chev December 2010 Hardware
  • joysticks?Is this ok [url]http://cgi.ebay.co.uk/Flash-Fire-Joystick-Atari-Commodore-Spectrum-MSX-Etc-/280598083389?pt=UK_VintageComputing_RL&hash=item4154f2f73…

    ... . So it's expected nothing bad should happen. :smile:

    RAM pack will know how sensitive ... -) Likely to cause a hang, bad for the electronics. In this ...
    RetroTechie RetroTechie December 2010 Sinclair Miscellaneous
  • Was John Lennon the best song-writer ever?Just something that was being discussed at work, since this is the anniversary of John Lennon's death, and I thought I'd post it here. How do you th…

    ... 's solo career. Faves are Ram, Memory Almost Full, and Chaos ... stage for 3 hours. Not bad for an old timer!
    Rebelstar without a cause Rebelstar without a cause December 2010 Chit chat
  • 48k rubber key screen corruption[IMG][URL=http://img195.imageshack.us/i/img7398g.jpg/][IMG]http://img195.imageshack.us/img195/5563/img7398g.th.jpg[/IMG][/URL] Uploaded with [URL=htt…

    ... imagine that one or more ram chips have failed and taken ... were as a shorted out ram chip will just burn out ... , and a bad power supply circuit can cause ram chips to fail ...
    guesser guesser December 2010 Hardware
  • Was John Lennon the best song-writer ever?Just something that was being discussed at work, since this is the anniversary of John Lennon's death, and I thought I'd post it here. How do you th…

    ... /> mine:

    mccartney
    ram
    chaos and creation in ... the album)

    really bad:
    some time in new ... self produced, is not that bad.
    the album "ringo" from ...
    WhenIWasCruel WhenIWasCruel December 2010 Chit chat
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    [QUOTE=Alcoholics Anonymous;499468]Tying RAM speed to CPU clock is ... , which could lead to very bad interrupt latency, enough that it ... in 'page reads' (to avoid RAM wait states, remember the ARM2 ... access data within a specific RAM page).

    And the ...
    Winston Winston December 2010 Hardware
  • Upgrading 16k MemoryHi All I have a fully working issue 2 16k spectrum and a broken issue3 48k spectrum (It's showing the black and white bars and some flashing blocks)…

    ... fault in the upper 32kb ram or logic chips. I ... :???: it's unusual that failed RAM chip(s) in the [I ... a cracked circuit trace, bad IC socket or something like ... those logic chips must be bad.
    [*] If (2) works: ... 32K x 8 bit static RAM chip for upper 32K ( ...
    RetroTechie RetroTechie December 2010 Hardware
  • Upgrading 16k MemoryHi All I have a fully working issue 2 16k spectrum and a broken issue3 48k spectrum (It's showing the black and white bars and some flashing blocks)…

    ... well the ROM tests the RAM when it boots.[/QUOTE]
    RAM chips which are [I]obviously ... not a bad test for starters. There are some RAM test programs ... hold off or the static ram IC.[/QUOTE]
    64Kx1 DRAMs ...
    RetroTechie RetroTechie December 2010 Hardware
  • Z88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …

    ... slight slowdown (honestly not that bad I don't think). Again ... of the new stdio (treat ram as a ramdisk with seek ... up to the top of ram where the lookup table for ...
    Alcoholics Anonymous Alcoholics Anonymous December 2010 Development
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... but it's not that bad.
    You won't ... /> [*] Replace lower 16K RAM with an SRAM (because those ... antique 4116 RAM chips die like fleas, ... /> [*] Replace upper 32K RAM with another SRAM (because 1 ... RAM chip is simpler than ...
    RetroTechie RetroTechie December 2010 Hardware
  • Z88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …

    ... slight slowdown (honestly not that bad I don't think). Again ... of the new stdio (treat ram as a ramdisk with seek ...
    Timmy Timmy December 2010 Development
  • Testing memory/transistors etc with multimeterAnyone have a rough guide to show how to do this properly? Im using the diode setting on the multimeter to test various components, im touching the b…

    Remember the finger-test as well: Any RAM that's too hot to touch for more than a few seconds, are most likely defective.
    And differences in temperature among the chips are generally a bad sign.
    Pilsener Pilsener January 2011 Hardware
  • Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…

    ... , because it is ~24K of RAM, and even with 7 MHz ... well for some situations & bad for others. Maybe there's ...
    RetroTechie RetroTechie January 2011 Hardware
  • Platformer BAS file?Does anyone have an example of a platformer in BASIC? Specifically one that uses drawn sprites, etc.

    ... 't like to use the RAM disk (although I have done ... -versa.
    - Loading from the RAM disk takes time. If you ... screens, it's just a bad idea having to keep loading ... new sets from the RAM disk continuously. This will be ...
    na_th_an na_th_an January 2011 Sinclair Basic
  • yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…

    ... z80 implementation and tbh 48k ram is very tight for what ... sizes only (that's the bad news) but with O(1 ... translation table and hooks into RAM (i.e. rewiring IM1 vector ... this part will be in RAM - but it should be relatively ...
    Alcoholics Anonymous Alcoholics Anonymous January 2011 Development
  • Platformer BAS file?Does anyone have an example of a platformer in BASIC? Specifically one that uses drawn sprites, etc.

    ... =na_th_an;505908]- Loading from the RAM disk takes time. If you ... screens, it's just a bad idea having to keep loading ... new sets from the RAM disk continuously. This will be ...
    Paddy Coleman Paddy Coleman January 2011 Sinclair Basic
  • Platformer BAS file?Does anyone have an example of a platformer in BASIC? Specifically one that uses drawn sprites, etc.

    ... loading data from the RAM disk is a bad idea. Besides, I ... Sinclair BASIC is also a bad idea. From many years of ...
    na_th_an na_th_an January 2011 Sinclair Basic
  • Platformer BAS file?Does anyone have an example of a platformer in BASIC? Specifically one that uses drawn sprites, etc.

    ... loading data from the RAM disk is a bad idea.[/QUOTE]
    bad idea. I am not suggesting you load data from a RAM ... disk continuously but why would it be bad to ...
    Paddy Coleman Paddy Coleman January 2011 Sinclair Basic
  • Platformer BAS file?Does anyone have an example of a platformer in BASIC? Specifically one that uses drawn sprites, etc.

    ... bad idea. I am not suggesting you load data from a RAM ... disk continuously but why would it be bad to ...
    Dunny Dunny January 2011 Sinclair Basic
  • Platformer BAS file?Does anyone have an example of a platformer in BASIC? Specifically one that uses drawn sprites, etc.

    ... you know how to call Ram Disk loading routines from Assembly ... follow why its deemed a bad idea... Is it a compatibility ...
    kgmcneil kgmcneil January 2011 Sinclair Basic
  • Platformer BAS file?Does anyone have an example of a platformer in BASIC? Specifically one that uses drawn sprites, etc.

    ... bad idea. I am not suggesting you load data from a RAM ... disk continuously but why would it be bad to ... ]

    It is a bad idea when used in critical ... the silicon disk is a bad idea, but doing so to ... I happened to use the RAM disk in some of my ...
    na_th_an na_th_an January 2011 Sinclair Basic
  • Platformer BAS file?Does anyone have an example of a platformer in BASIC? Specifically one that uses drawn sprites, etc.

    ... =na_th_an;506360]It is a bad idea when used in critical ... bad program design and has nothing to do with using a RAM ...
    Paddy Coleman Paddy Coleman January 2011 Sinclair Basic
  • Platformer BAS file?Does anyone have an example of a platformer in BASIC? Specifically one that uses drawn sprites, etc.

    ... several UDG sets from the RAM disk in your game ... options: load them up in RAM, as I suggested, or ... load them from RAM disk whenever you need them ... explain why that was a bad idea if you need ... m talking about using the RAM disk to store several ...
    na_th_an na_th_an January 2011 Sinclair Basic
  • Testing 4116 and 4164 chipsI have a stash of old 4116 and 4164 chips and wondered how best to test them to see if they work. I don't have a working spectrum to plug them into …

    ... ;506758]funny, they are dynamic ram, so latching data will be ... with the RAM I want to test.

    The bad thing ... socket for various tyoes of RAM) and use it as a ...
    mcleod_ideafix mcleod_ideafix January 2011 Hardware
  • Testing 4116 and 4164 chipsI have a stash of old 4116 and 4164 chips and wondered how best to test them to see if they work. I don't have a working spectrum to plug them into …

    ... with the RAM I want to test.

    The bad thing ... socket for various tyoes of RAM) and use it as a ...
    LCD LCD January 2011 Hardware
  • Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…

    ... even a single byte of RAM cannot be better than the ... name one).[/QUOTE]
    Very bad side-effect indeed. Now instead ...
    TVzombie TVzombie February 2011 Sinclair Basic
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