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<1234567…34>
  • 128K Contention - How to get it right?With my recent hardware hackery, I've built a 128K (toastrack) clone. I can't quite get the contention right though. What I'm lack is a clear descri…

    ... same test on a 48 ULA, because I don't have ... any spare ULA and it is well documented ... . You have written book about ULA 48 but it is impossible ... out any information about ULA 128 or ULA +3 or ULA in ZX Interface ...
    vranik vranik July 2011 Hardware
  • Incorrect Spectrum +3 emulation: different results on Fuse and SpecEmuWhen developing and testing [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027591"]Rotatrix[/URL], I noticed different results on Fuse and S…

    ... should get glitching on a ULA 128, but not on an ASIC ... 128. Only SpecEmu showed up the ...
    chev chev April 2012 Emulators
  • Spectrum +2 EPROM in Spectrum +2AHi, My friend Marc bought a +2A from Tim Abbott at the Spectrum 30 event. Back in the day there were companies selling +2 ROMs to put into +2As to r…

    ... />
    Unless you have a ULA 128 + keypad, or a +2A/+2B ... ) and a version of the 128 editor ROM with three bytes ...
    chev chev September 2012 Hardware
  • Spectrum +2 EPROM in Spectrum +2AHi, My friend Marc bought a +2A from Tim Abbott at the Spectrum 30 event. Back in the day there were companies selling +2 ROMs to put into +2As to r…

    ... ;652913]Unless you have a ULA 128 + keypad, or a +2A/+2B ...
    BiNMaN BiNMaN September 2012 Hardware
  • Rainbow Chaos(I so want to call this Law of Chaos to pun on lords) Anyway. Dunno if I'll make this. But if I don't /someone/ will want to. It's just too good an …

    ... The two issues on the ULA 128s are that the ... no glitching. On the ULA 128s the number is ... of the time the ULA 128 version will just seem a ... benefit to doing a ULA 128 specific version as the ... from Velesoft with the ASIC 128 contention model (and no ...
    chev chev August 2013 Development
  • coding guruOk I'm looking for a to help me in my quest to do my first proper game. The 80's child in me thinks he can do it, But the 2013 man in me knows zip. …

    ... ]1 page will hold a 128*128 map or more if I ... 're running on a ULA 128 or an ASIC 128 (banks 1, 3 ...
    chev chev September 2013 Sinclair Miscellaneous
  • Multiface 128 problemHello everyone i have a 48k plus speccy which i firstly thought was working perfectly. It passed all the test of the official Sinclair test tape (cpu…

    ... Sinclair test tape (cpu, rom, ula, ram) so i thought it ... /> Today i bought a multiface 128 from ebay, On this particular ...
    gtsamour gtsamour November 2006 Hardware
  • ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …

    ... ok.However whenever the spectrum 128+ is connected on that channel ... a faulty Ferranti ULA chipset?

    Unfortunately spectrum 128+ does not ... tv.

    If ULA is the problem does anyone ... know if there are replacement ULA chips?I know that ...
    Msx2 Msx2 July 2007 Hardware
  • 128 I/O portsIn The Spectrum Hardware Manual there is a small circuit on page 71/72 to allow 128 I/O ports by using IORQ+A7 to override IORQGE, so any I/O access …

    ... page 71/72 to allow 128 I/O ports by ... with A7=0 prevents the ULA from responding, so freeing ... high to doubly ensure the ULA is not selected. A ... and IORQGE=0. A faulty ULA responds when IORQGE=0, ignoring ... br />
    Looking at the 128 I/O ports patch, it ...
    Jonathan Harston Jonathan Harston November 2007 Hardware
  • 128 port hardware patchReading the ULA book has reminded me of something. In The Spectrum Hardware Manual (Adrian Dickens) there is a hardware patch to allow free use of al…

    Reading the ULA book has reminded me ... the CPU to fix a ULA bug (p71). The following ... transistor patch and the Dickens 128-port patch both being ... Can anybody explain why the 128-port patch doesn't work ... hardware patch that disables the ULA when A7=0?
    ...
    Jonathan Harston Jonathan Harston September 2010 Hardware
  • ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…

    ... memory address generated by the ULA (who wants to read ... two addresses. Therefore the ULA reads the data from an ... ). After that 128T, the ULA is busy drawing the border ... the remaining 228-128 = 100T (or 224-128 = 96T on ... of a screen line (128 tacts) so that R ...
    Hikaru Hikaru January 2014 Development
  • Toastrack ULA QuestionDid any of the toastracks have the +128 grey ula with Amstrad printed on them?

    Did any of the toastracks have the +128 grey ula with Amstrad printed on them?
    zedexspectrum zedexspectrum July 2014 Hardware
  • 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 ... is not suitable for 128/+2/+3/+2A machines, as ...
    rga24 rga24 February 2018 Emulators
  • Football Director 128Sorry if this has come up before but having downloaded Football Director 128 when I try to load it it always seems to crash on the title page. Any o…

    Sorry if this has come up before but having downloaded Football Director 128 when I try to load it it always seems to crash on the title page. Any one know what I'm doing wrong? Does anyone else have this problem?

    Cheers!

    Paul
    paul paul January 2002 Games
  • 128 +2 video connections.I have just got my hands on a Spectrum 128 +2 grey model all in working order, what I need to know is if I take a signal from the CVBS Composite Vid…

    ... my hands on a Spectrum 128 +2 grey model all in ...
    Anonymous Anonymous April 2001 Sinclair Miscellaneous
  • Original 128 Part 2: The KeysMy 128 appears to work fine. The keys all have perfect responsiveness. All except keys 1, 2, 3, 4 and 5. These five number keys don't work at all. E…

    My 128 appears to work fine. The ...
    Spector Spector January 2001 Sinclair Miscellaneous
  • Stop me from blowing up my original Spectrum 128!I have a Spectrum 128 (not the +2), and I want to play some of those old classic games again. The trouble is this. I still have the original Power Su…

    I have a Spectrum 128 (not the +2), and I ... it will work on the 128, but...

    I'm ...
    Spector Spector January 2001 Sinclair Miscellaneous
  • ZX Spectrum 128 BoxedRoll up, roll up ... etc ... I've eBayed two of my Speccy 128 machines. Only a few days of bidding left ... Take a look if u r interested in acquir…

    ... eBayed two of my Speccy 128 machines. Only a few days ... a boxed Spectrum 128 machine, and a Spectrum 128 machine without working ... as I have another boxed 128, so these are spares.
    Refrenz Refrenz December 2001 Sales
  • Multiface 128I have a Multiface 128 which I'm thinking of selling... Only thinking of it... The button and case are damaged, There are some aesthetic defects (I s…

    I have a Multiface 128 which I'm thinking of ...
    Fuzzbucket Fuzzbucket August 2001 Sales
  • 128 mk1 + stuff for saleunboxed 128 mk1 for sale (with leads i think!!) together with 100+ games, dk'tronics dual joy interface and box of old speccy mags - mostly Crash. H…

    unboxed 128 mk1 for sale (with leads ...
    [-HIVE-] [-HIVE-] August 2001 Sales
  • Multiface 128Greets :) I am after either.... a) Somebody willing to sell a working one or b) Somebody who can repair a red button activation problem AND/OR so…

    ... sort me out with a 128 PROM.

    thanks
    BadBeard BadBeard July 2002 Wanted
  • Spectrum 128+ production periodMy favourite version of the Speccy is the 128, the heatsink version, and I'm wondering when mine was made. I got it Xmas 1986 (after seeing the +2 on…

    ... of the Speccy is the 128, the heatsink version, and I ... they stopped producing the original 128's?
    Spector Spector September 2002 Sinclair Miscellaneous
  • My Speccy 128 gets wobblyI'm having trouble with the picture on my 128+. The picture starts flickering like crazy until it's unusable. Sometimes I turn it on and it's okay, b…

    ... with the picture on my 128+. The picture starts flickering like ...
    Spector Spector October 2002 Sinclair Miscellaneous
  • has anyone converted an early speccy to drive a monitor ?sorry if this is the wrong forum, but there doesn't seem to be a hardware one, per se. I've been looking through the schematics a bit today - it see…

    ... restriction is the ULA - if one from a 128+ or later could ...
    GP GP December 2002 Sinclair Miscellaneous
  • WANTED: 128k+ or 128k +2(early grey mod.) ULA chipHello, Attempting to repair my 128k+ speccy. Needs a ULA(IC1)chip from either a 128k+ or an early +2 will work also. If anyone has this chip or has a…

    ... 128k+ speccy.
    Needs a ULA(IC1)chip from either a ... 's broken(other than the ULA), please give me a shout ...
    thomas3120 thomas3120 January 2003 Wanted
  • READ HERE! AUDIO IN FOR 128+2A???hey my name is Paolo and I'm from Italy..this is the first time that I post on this forum..I would like to connect or create an EAR input or somethin…

    ... THING![Today I opened my 128 and I saw the tape ...
    DaRkHoRaCe DaRkHoRaCe January 2003 Sinclair Miscellaneous
  • what was your favourite spectrum 128 tune?although music back in the 80's may be more remembered on the c64 than the spectrum 128, there were still loads of great game tunes on the spec128 ba…

    ... the c64 than the spectrum 128, there were still loads of ...
    Technician-Ted Technician-Ted January 2003 Sinclair Miscellaneous
  • Mint condition ZX Spectrum+ 128Hi For sale: mint condition ZX Spectrum+ 128 including manuals, leads, transformer and original packaging, together with Ocean's Daley Thompson's Su…

    ... sale: mint condition ZX Spectrum+ 128 including manuals, leads, transformer and ...
    obelisk obelisk June 2003 Sales
  • Multiface One vs. Multiface 128?Hello all! Does anyone happen to know how the Multiface One and Multiface 128 differs from each other? I'm using a 48k Speccy and bought a M1 which …

    ... the Multiface One and Multiface 128 differs from each other? I ...
    Yanek Yanek June 2003 Sinclair Miscellaneous
  • GRM 128 for saleI've got ZX-Spectrum 128 clone for sale - "Grand Rom Max 128". It is in white metallic case with external keyboard. The computer contains Beta 128 di…

    I've got ZX-Spectrum 128 clone for sale - "Grand Rom ... Max 128". It is in white metallic ... keyboard. The computer contains Beta 128 disk interface with one built ... drive. Timings close to Pentagon 128. Works fine. Send your questions ...
    Mac Buster Mac Buster July 2003 Sales
<1234567…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
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    rich_chandler on April 21
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    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
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    mel the bell on April 20

HitBox

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ula 7.3K 13K
128 9.4K 14.8K

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