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Search Again :: Adv Search 1000 results in 0.020s
<1…16171819202122…34>
  • contended memory...so memory contention on the toastrack and the grey +2 is in the wrong place compared to the documentation, yet the +2a/b and +3 it is in the correct …

    ... TTL chips, not inside the ULA as in the +2A/B ... the PAL 10H8 pins 5, 6 and 7 this way:
    6 and 7.[/QUOTE]

    6?
    BiNMaN BiNMaN February 2011 Hardware
  • New To Group....Hi All, A quick introduction as this is my first post. I am a Scarborough, UK based chap who is quite heavily into retro computing, more specificall…

    ... issue to me - if bit 6 of every memory location was ... the data lines to the ULA is dead (if you're ...
    gasman gasman March 2011 Hardware
  • Wanted: Rubber Key 48K M/board or ULAI have a spectrum that isn't too happy. It seems to be a problem with the ULA... So, has anyone got a spare working motherboard that'll fit in my ca…

    ... ) - they are compatible with the -6 version.

    I also ... 100% sure it is the ULA, I will opt for the ...
    Jason9 Jason9 March 2011 Wanted
  • 48k keyboard dead problemHi This is my first post and probably a problem thats been on here loads. Just been given a 48k, get the copyright screen but can't advance. I di…

    ... are other issues such as ULA that can cause it although ... half row. ie you lose "6" to "0" or "z" to ...
    spider spider March 2011 Hardware
  • Memory upgrade for ZX Spectrum 16/48This is external memory upgrade for ZX Spectrum models with 16kB ram. Can be connect also to 48kB models, but need remove 8 dram chips (from sockets …

    ... pages are fast memory and ula not slow down pages 1 ... on ZX128 or 4,5,6,7 as on +2A/+3 ... TR-DOS rom(tr-dos 6.09) then will possible use ... .
    However I have already 6 computers compatible to 128K, so ...
    velesoft velesoft March 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…

    ... 8434 SCR168 / SCR166
    ULA: FERRANTI 6C001E-7 8415
    CPU: NEC ... 4A SRC168 8430 SCR166
    ULA: FERRANTI 6C00IE-7 8426
    Zetr0 Zetr0 April 2011 Sinclair Miscellaneous
  • 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…

    ZX Spectrum 48K with black TS1500 casing
    Serial P 071091 Model M-332 48K - Silver Sticker (Assembled in TMX Portugal)
    Issue 3 1983
    SRC121
    Encarnado Encarnado June 2011 Sinclair Miscellaneous
  • 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…

    ... (cream) SRC168 8426
    ULA: Ferranti 6C001E-7 8407
    ROM: AMI ...
    monty.mole monty.mole June 2011 Sinclair Miscellaneous
  • 48k dots appear but not with CUB monitorToday I tried out an issue 3 and an Issue 2 with the CUB monitor, to my surprise they both worked flawlessly, now before when I tried them on any oth…

    ... mcleod, ive tried at least 6 ULA's in it so far ...
    Macc Macc June 2011 Hardware
  • 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…

    Here's one horrid assembler implementation of keyboard emulation..

    [code]
    SetShiftCtrlState PROTO
    GetSpeccyKeyState PROTO

    .data?
    keyboard_state BYTE 256 dup (?)

    keyboard_hasfocus BYTE ...
    Woody Woody August 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…

    ... =buffer[5];
    B2=buffer[6];
    F2=buffer[7];
    PeterP PeterP August 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…

    ... =buffer[5];
    B2=buffer[6];
    F2=buffer[7];
    rich_chandler rich_chandler August 2011 Emulators
  • 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…

    ... .net/forum/viewtopic.php?f=6&p=631234]dead cockroach ... [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…

    ... .net/forum/viewtopic.php?f=6&p=631234]dead cockroach ... [url=http://www.zxdesign.info/]ULA book[/url]...


    ula which doesnt need the fix ...
    spodula spodula October 2011 Hardware
  • playing sound samples from Boriel's zxbasic-compilerfirst of all, sorry if it sounds confusing if i'm posting this thread here instead instead of at Discussions:SinclarBasic it's because this is more …

    ... (above 32768) so that the ula doesn't introduce random delays ... corresponds to 3.5*10^6/76 = 46 kHz. With 8 ...
    Alcoholics Anonymous Alcoholics Anonymous October 2011 Development
  • CSS has been Rogeredcomp.sys.sinclair has just been rogered. I make do with a summary when anything happens and activity shot up on Friday. Turns out to be the usual qu…

    ... %20Chris%20White%20^51991^6%20 ^5PD^6.zip

    sim ... which is what i thought ula snow was whereas that is ... />
    page 111 fig 12-6
    theres a line from ...
    Ralf Ralf October 2011 Chit chat
  • CSS has been Rogeredcomp.sys.sinclair has just been rogered. I make do with a summary when anything happens and activity shot up on Friday. Turns out to be the usual qu…

    ... %20Chris%20White%20^51991^6%20 ^5PD^6.zip

    sim ... which is what i thought ula snow was whereas that is ... />
    page 111 fig 12-6
    theres a line from ...
    polomint polomint October 2011 Chit chat
  • CSS has been Rogeredcomp.sys.sinclair has just been rogered. I make do with a summary when anything happens and activity shot up on Friday. Turns out to be the usual qu…

    ... %20Chris%20White%20^51991^6%20 ^5PD^6.zip

    sim ... which is what i thought ula snow was whereas that is ... />
    page 111 fig 12-6
    theres a line from ...
    Wookiee Wookiee October 2011 Chit chat
  • Up/Down Left/Right scrollCan anybody give a newbie some pointer to simple one char scrolling by pixel? I've looked at a lot of resources, but as you can imagine, it's all a …

    ... memory is decoded by the ula to generate the picture. Simply ... /> 00000111 11111000

    shift = 6 bits

    00000011 11111100 ...
    Alcoholics Anonymous Alcoholics Anonymous November 2011 Development
  • 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…

    ... a 48K, with a 48K ULA which does I/O contention ... contention pattern, as the 128K ULA does implement I/O contention ... pages 1, 3, 4 and 6. I think this is what ...
    mcleod_ideafix mcleod_ideafix November 2011 Hardware
  • 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…

    ... contention pattern, as the 128K ULA does implement I/O contention ... operations: essentially the 48K/128K ULA applies contention at every available ... opportunity, whereas the +3 ULA applies it only while memory ... pages 1, 3, 4 and 6. I think this is what ...
    Philip Kendall Philip Kendall November 2011 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... signal (which comes from the ULA - which we know works - via ... 's the value of pin 6 on the CPU compared to ...
    Spirantho Spirantho November 2011 Hardware
  • Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…

    ... the issue 6 circuit board, have a look at the ULA versions ... you measuring /RAS? A the ULA or DRAM? If at the ... ULA, then no cleanup possible.
    < ...
    csmith csmith December 2011 Hardware
  • Create a new microdrive cartridge image formatHi there, I'm working to emulate the IF1+Microdrives in JSpeccy.I've found what the "classic" MDR format ins't capable to store all the required inf…

    ... not transparent to the IF1 ULA, you need to remove the ... ) [in converted mdr files, where 6 < n < 255]
    zx81 zx81 December 2011 Emulators
  • Real 60Hz NTSC 48K ZX SpectrumNot a 3rd party mod. The joystick mod was added by the user, but the board and the computer is exactly what was sold in Chile, South America. We migh…

    ... freq of pal is 1/6 less than NTSC, so ... increase the crystal by 1/6 to push the vertical frequency ... from this crystal. The Speccy128 ULA divides by 2.5 to ... the horizontal period is 1/6 less than it was, squashing ... /> All games will run 1/6 faster, so good luck!
    csmith csmith January 2012 Hardware
  • Grey +2 video output and oddities.I've been experimenting with one of the above that I acquired years ago, but had just been buried at the back of a cupboard. I've connected it up to…

    ... on pin 1 (from pin 6 of the TEA2000) is soldered ... only slightly quieter than the ULA/cassette generated sounds.

    Zorn Zorn January 2012 Hardware
  • Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…

    ... cpu
    3-) ROM or ULA
    4-) ROM
    5 ... -) low memory (video memory)
    6-) not your case

    Turrican Turrican January 2012 Hardware
  • Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…

    ... cpu
    3-) ROM or ULA
    4-) ROM
    5 ... -) low memory (video memory)
    6-) not your case[/QUOTE]
    ULA because i tested it succesfully ...
    deckard deckard January 2012 Hardware
  • 128K heatsink no color in composite video and bad antenna outputI am currently repairing a ZX Spectrum 128K heatsink model. It gives no colors on composite video output, and very bad antenna output. I opened it a…

    ... the TEA2000
    - replacing the ULA
    - disconnecting the composite video ... out is taken from pin 6 of the TEA2000
    - checking ... /> So, if the TEA and ULA are ok, what could possibly ...
    bverstee bverstee February 2012 Hardware
  • 4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…

    ... part entitled "The importance of ULA cooling". Maybe you can find ... about your description of a ULA bug involving /RAS. The /RAS ... signal from the ULA is used to switch the ... is stable and so the 6C001E-7 introduced a delayed /CAS ...
    Zorn Zorn February 2012 Hardware
<1…16171819202122…34>

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