World of Spectrum
  • Categories
  • Discussions
  • FAQ
  • Sign In
Home › Search
Title Search
@title beer Word 'beer' in title
User Search
  • @user admin Only posts by Admin
Text Search
  • @body beer Word 'beer' in the text
Phrase Search
"Hello World" Exact phrase match
Exclude Terms
  • car -red Search cars that are not red
"Or" Searches
  • honda | bmw 'honda' or 'bmw' results
Multi-Field
@(title,body) hello Both contain 'hello'
WildCard
  • hond* civ* Match all with an astrix
Combination
  • @title bmw @user admin
See more supported syntax examples
Search Again :: Adv Search 1000 results in 0.012s
<1…17181920212223…34>
  • Help with +3 in comaHi everyone Had a spectrum +3 under the bed for some time and when replacing its drive i accidentally connected the 5v and the gnd of the led. Now…

    ... />
    Well, already replaced the z80 and the roms for eproms ... hope that its not the ULA that is behind all this ... post about soldering a new ula and i could give it ... my hands on a +3 ula somehow or is there a ...
    odious odious August 2005 Sinclair Miscellaneous
  • Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …

    ... , have you tried changing your Z80 or ULA or anything? Either of ... fault (unlikely to be the Z80 but you never know).
    ULA...? How long did Amstrad make ...
    Spirantho Spirantho September 2005 Sinclair Miscellaneous
  • New GP32 coming out....The spec looks excellent and should run MAME, SNES and hopefully GBA full speed. Whats also exciting is the TV out connection !.... The ultimate ho…

    ... tied by the ULA emulation to the main z80 emulation - if you ...
    Dunny Dunny September 2005 Sinclair Miscellaneous
  • Fairlight 48k - version 1 missing from archive.I have an original version of Fairlight WITHOUT the copyright message 'Copying this tape is against the law under the Copyright Act, amended 1985. C…

    ... speccy showing and everything labelled (z80, ula memory etc), and descriptions.
    FrankT FrankT September 2005 MIA/STP/SDP
  • New CEZ GS game: COLUMNSFinally we've finished it!! After a long time coding, making graphics, musics and testing (as you could view in the forum if you know spanish -sorry-…

    ... ) and then loaded the resulting .Z80 file. Works 100% (and the ... - so it is a perfect .Z80 snapshot).

    If you ... are experiencing are probably the "ula snow" effect of the grey ...
    Tom-Cat Tom-Cat October 2005 Games
  • AdviceIf I connect a personal CD Player to my +2A to load Speccy games from the CD-R/CD-RW to the SOUND socket of the +2A, will anything happen to the comp…

    ... easier to replace than a Z80 or ULA or any other critical ...
    cyborg cyborg November 2005 Sinclair Miscellaneous
  • The ULA and ScreenI've asked something similar before but please bear with me. I'm trying to understand the way the screen is controlled. The ULA controls output to …

    ...
    Think of the Z80 and the ULA as two devices running ... at a time. The ULA obviously takes priority, so ... z80. You have no control over the ULA. As the ULA ... change the attributes as the ULA passes over them, and ... the same location - the ULA will pick up the ...
    Dunny Dunny November 2005 Hardware
  • Faulty 128Need some help here. I've got a 128+ that won't boot to the menu. It just displays a load of rubbish on the screen. Here's an example of what it does…

    Probably bad RAM/Z80 but maybe a fried ULA, possibly a whole jost of other possibilities.

    You need the help of: (que superhero music) Spirantho. He's about the best guy to ask on here.
    DEATH DEATH November 2005 Hardware
  • 128k, +2, +3ok i`ve asked a lot of questions over the few days but this is gonna be my final one on whats what unless i get lost once i get my apeccy so here goe…

    ... speccy's ingenious resistor-decoupled z80 and ULA buses, luckily only very ...
    Digital Prawn Digital Prawn December 2005 Hardware
  • broken ZX SpectrumHi there I was given a dead ZX Spectrum years ago, and being bored today thought I'd try it again. Its a Sinclair ZX Spectrum with lovely rubbery key…

    ... as likely to be the Z80, the lower RAM block, the ... the lower memory block, the ULA - in fact, it could be ...
    DEATH DEATH January 2006 Hardware
  • Beginner InfoI have trying to find some hardware information for use with assembly coding but havn't had much luck. For instance. How do I redirect the vertical …

    ... 8 bit identifier. The z80 forms a 16 bit address ... is left floating when the z80 wants to read the ... when the ULA's vbi interrupt occurs, the z80 reads a ... the data bus when the z80 is looking for a ... identifier will be when the ULA interrupts. So, to deal ...
    Alcoholics Anonymous Alcoholics Anonymous February 2006 Development
  • Lesser used BASIC commandsAre there any interesting articles or books that explore some of the lesser used BASIC commands/functions e.g. DEF FN, IN, OUT etc? The Spectrum BAS…

    ... to 65535

    The Z80 microprocessor inside the Spectrum can ... /O map.

    The Z80 microprocessor inside the Spectrum can ... screen. It writes to the ULA?s (uncommitted logic array) register ... the byte sent to the ULA control the border colour of ...
    Blondin235 Blondin235 March 2006 Sinclair Basic
  • ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…

    ... 256 banks of 16k. The Z80 address space
    is split ... b2 b1 xx - Page where ULA fetches
    video data from ...
    MikeW MikeW April 2006 Hardware
  • ZXCF InterfaceI'm just trying to get an idea for the ZXCF interface, and to me, it looks a much cleaner design compared to divIDE (Of course, that's just my opinio…

    ... 256 banks of 16k. The Z80 address space
    is split ... b2 b1 xx - Page where ULA fetches
    video data from ...
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Hardware
  • What should be the base address to set for my codeHi, I am new here and I have a simple question but one which I have not found an answer to. When I am developming my programs what should I set th…

    ... spectrum. The z80 has to defer to the ULA for memory accesses ...
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... move the top of the z80's stack to 54016. You ... system? Nothing usually, but the ULA is generating an interrupt each ... . The Basic system puts the z80 in im1 mode, which means ...
    Alcoholics Anonymous Alcoholics Anonymous April 2006 Development
  • Bought a speccy from ebay but need helpJust bought a speccy now so i don`t have it here yet but i bought one that might be broke have a read on what it says and tell me if you think it`s f…

    ... only the RAM and/or Z80 that's gone down. At ... worse, it's the ULA - almost impossible to find outside ...
    DEATH DEATH May 2006 Hardware
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... current instruction is complete the z80 effectively calls a subroutine ... enables them so that the z80 will respond. When maskable ... provided by the ULA as peripheral id, the z80 will always ... table
    ; d100 - d2ff ------- z80 stack (512 bytes) set SP ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…

    ... to field interrupts from the ULA:

    [code]
    z80 in im2 mode. This ... , on interrupt, the z80 will always jump to the ... ULA interrupts and supplies a random peripheral id to the z80. The z80 ... 0xd4 bytes, the z80 will read 0xd4d4 as ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • Faulty 128KI digged out my Spectrum 128, and it wakes not up. I don't have experience, only with 48K. Maybe someone can give me some hint, clue. It looks like m…

    If not the ULA, it's most likely to be RAM/Z80. You's be surprised at how often the Z80 goes down.

    You can do basic voltage checks to see if all the voltages are present, that may be a start....
    DEATH DEATH June 2006 Hardware
  • new spectrumI have notices all sorts of advances on the C64 sceene such as 20mhz cpus, gui`s, and IDE interfaces. are they any kind of advances in development fo…

    ... sense to plug a modern Z80 into the board than use ... options), 27K visable by the ULA instead of the usual 6 ... SE called for a 100MHz Z80 clone or something, but if ... a suitable real Z80 is available it would be ...
    Laser Laser June 2006 Hardware
  • The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…

    ... is still supplied by the ULA, contrary to bit 7 of ... manufacturers, and does vary with temperature after switching on, but executing ...
    Woody Woody July 2006 Emulators
  • RealXThis may be a dumb question but will RealX ever get released?

    ... a good understanding of how ULA snow really works. And ... 0x40-0x7F then the ULA gets confused by the ... memory refresh cycles of the Z80 (performed during each instruction ... that the address the ULA uses to build up ... A8 = A15-A8 of the ULA address
    A7-A0 = ...
    Dunny Dunny July 2006 Emulators
  • RealXThis may be a dumb question but will RealX ever get released?

    ... for determining where the ULA reads display/attr bytes ... We only studied the 128K ULA directly, not the 48K one ... address lines of the ULA's private bus are ... ) is applied when the Z80 starts a memory cycle at ... is to know about the ULA!
    [/QUOTE]
    ...
    Luca Luca July 2006 Emulators
  • Spectrum 128+2Greetings to all My Speccy Tape Drive has died. Fully blown :( Is there any way to hook up a external cassete player to the +2? I can't see any "lin…

    On a +2a board, Z80 and ROMs away from you, ... visa versa) will fry the ULA/Gate Array chip.
    DEATH DEATH August 2006 Hardware
  • RealXThis may be a dumb question but will RealX ever get released?

    ... because that's what the Z80 actually does), which can possibly ... quoted:
    [quote]...the ULA gets confused by the memory ... refresh cycles of the Z80 (performed during each instruction ... by the ULA immediately after the rising edge of the Z80, which ...
    Luca Luca August 2006 Emulators
  • The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…

    ... think the 6502 vs Z80 speed ratio is higher ... seen a really poor z80 performance as well but ... to be exceptionally poor z80 code to achieve that. ... less flexible environment than the z80. Lots of people would ... been a problem for the ULA.

    [quote]
    Alcoholics Anonymous Alcoholics Anonymous September 2006 Sinclair Miscellaneous
  • The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…

    ... a 2.5MHz z80 to a 10Mhz z80. Clearly the latter ... .67:1 to meet the z80's performance.

    Regarding the 6502 and z80, the 6502 came out in ... Maybe but the ULA is monitoring the z80 bus for memory ... the same as the usual z80 refresh cycle. Maybe it ...
    Alcoholics Anonymous Alcoholics Anonymous September 2006 Sinclair Miscellaneous
  • You know how the 128K was faster than the 48K Spectrum?Regarding how the Spectrum 128K ran at 3.54 MHz rather than the 48K's 3.5MHz, was this difference enough to be an advantage? If not, then surely Sinc…

    ... , 4, 6, 8, ... speeds). The z80 clock, however, is derived from ... clocked a lot faster, the ULA was pretty much tied to ...
    Matt_B Matt_B September 2006 Hardware
  • You know how the 128K was faster than the 48K Spectrum?Regarding how the Spectrum 128K ran at 3.54 MHz rather than the 48K's 3.5MHz, was this difference enough to be an advantage? If not, then surely Sinc…

    ... divided by two yields the ULA-interruptible Z80 clock.

    Regards ...
    Marcelo Marcelo September 2006 Hardware
<1…17181920212223…34>

Latest Posts

  • Minor British Sports that did become games on the ZX Spectrum
    dmsmith on April 22
  • I bought an accoustic guitar. How do you play it?
    Maroc's Other Projection on April 22
  • Goodbye Z80
    moggy on April 22
  • Happy 40th Birthday to the Amstrad CPC464!
    AndyC on April 22
  • Another Birthday! The Game Boy Is 35!
    dm_boozefreek on April 22
  • I am currently watching.....
    Antiriad2097 on April 22
  • European Software Titles with an English version
    harriusherbartio on April 22
  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on April 22
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on April 22
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21

HitBox

Word Docs Hits
temperature 642 846
ula 7.3K 13K
z80 13.7K 21.5K

Related Threads

  • ULA......Woooooo and ULA 160??'ello all from down under !<br /> <br /> they don't know the speccy well this way it seems, <br /> <br /> anyways, picked up my brand new astra yeste…
  • Serching for ZX printer ULA and ZX interface I ULAIs there anyone having any spares. In both cases, I swapped ULA's from working equipment which fixed things, so I'm 100% sure it's the ULA that is ca…
  • Where: ZX Printer ULA's and ZX interface I ULA'sIs there any source left for these ULA's? Alot of tings can be replaced, like the ZTX transistors and occasionally you can come accross a normal ZX S…
  • "Decoding z80 Opcodes" (http://www.z80.info/decoding.htm#intro) - Incorrect HALT Opcode?Apologies if this is a dupe but I searched within the forums and couldn't find anything.<br /> <br /> I've been working on a z80 emulator (for acad…
  • 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]<br /> Err, why?<br /> <br /> If you are trying…
  • Z80/SNA Compiler under Windows???Does anybody know anything about Z80/SNA compiler under Windows???
  • 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 …
  • Z80 to DSK?Does anyone know if there is a prog that can convert z80,tzx or tap files to<br /> dsk format? I have access to a friends pc that has a 3 inch drive …
  • Z80/SNA compiler under Windows???Does anybody know anything about Z80/SNA compiler under Windows???
  • Visible-Z80 - VISZ80 - by Miklos PatrubanyHi All !<br /> <br /> Visible-Z80 - VISZ80 - by Miklos Patrubany<br /> <br /> Does anyone have this program ?<br /> Please help me.<br /> <br /> …

Related Searches

  • z80
  • 3b ula
  • issue 3b ula
  • z80 to tape
  • harlequin modified ula
  • ula model 2
  • z80 compiler
  • ula
  • z80 m1
  • zx 2 ula
  • zx 2 ula interchange
  • zx 2 ula swap
  • grey 2 ula swap
  • ula 128
  • thermal temperature ula z80 gun
  • temperature ula z80 gun
  • temperature ula z80
  • degrees ula z80
  • temperature ula
  • ula generated ras going high switches the 74ls157 mux to select z80 column address

Copyright © 2024 World of Spectrum