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 0.014s
<1234567…34>
  • Data bus at interrupt timeIt is "well known" that some peripherals can put values other than 0xff on the data bus at interrupt time, thus meaning that IM2 is slightly more fid…

    ... other than 0xff on the data bus at interrupt time, thus meaning ...
    Philip Kendall Philip Kendall March 2009 Hardware
  • Compact Flash Card In "Memory Mode" - (Help)Hello my fellow WoS'ers I have been developing a Z80 8bit interface with a compact flash card port based on Pera's ZXCF "memory mode" interface for …

    ...
    [COLOR="Blue"][B]Data Bus Signals[/B][/COLOR]
    [code]
    [COLOR="Green"][B]Address Bus Signals[/B][/COLOR]
    [code]
    Signals[/B][/COLOR]
    [code ... Z80:[/COLOR] [COLOR="Blue"]Data Bus[/COLOR][/B]
    [ ...
    Zetr0 Zetr0 January 2014 Hardware
  • Making your own joystick interfaceJust spied the diagram for the kempston joystick interface in the docs section. For someone who has only made up cables, what is involved in constru…

    ... sided boards which carry address/data bus signals (lots and lots of vias ...
    Winston Winston June 2007 Hardware
  • RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…

    ... address bus, the data bus and the control bus.

    The address bus is ... access.

    The data bus is 8 bits wide (one ... -directional. It carries the data byte from the CPU to ... to time the address and data bus signals correctly.

    As ...
    1024MAK 1024MAK March 2013 Hardware
  • RAM Diagnostic ROMhi all, i burn this ROM from here [url]http://www.fruitcake.plus.com/Sinclair/Interface2/Cartridges/Interface2_RC_New_RAM_Tester.htm[/url] and i a…

    ... address bus, the data bus and the control bus.

    The address bus is ... access.

    The data bus is 8 bits wide (one ... -directional. It carries the data byte from the CPU to ... to time the address and data bus signals correctly.

    As ...
    xaris_sm xaris_sm March 2013 Hardware
  • DIVIDE PLUS - ZX bus protectorI make new ZX BUS PROTECTOR for use with DIVIDE PLUS interface. This is very small "convertor" for connection to new ZX BUS connector. PCB contain on…

    ... JOYSTICK interface[/B]. Data collision will disabled via ... /> - ROMCS and both ROMOE signals on ZX 128/+2A/+3 ... ZX BUS on ZX Spectrum. Can work as data ... can't collide on data bus. Enable use allram mode ... DIVIDE/DIVIDE PLUS without data collision. ZX games ...
    velesoft velesoft November 2010 Hardware
  • Dangerous Allram Mode On +2a / +3ZX Spectrum 128+2A and +3 support allram feature on port 1FFD. On this ZX models is very dangerous set allram if is connect any interface with extern…

    ... ROMOE signals on ZX bus and connect external memory rom/ram to data bus ... mode then block of ROMOE signals is without effect (ZX+2A ... disconnect ram) and ZX ram data will collide with external memory ...
    velesoft velesoft December 2008 Hardware
  • Thinking ahead...Just mulling something over for the Project After The Spectranet (which seems to have become never-ending...) Would anyone (except for me, naturally…

    ... lines (full address bus, data bus, and 8 of the signals of the control ... bus - RD, WR, IORQ, MREQ ... that the sequencing of the signals can be seen in reasonable ...
    Winston Winston June 2009 Hardware
  • Broken keyboard due to broken ULARecalling csmith's thread about dead ULAs, a thread appeared in the Zonadepruebas (Spanish) forum regarding... a dead ULA, but only a partially dead …

    ... D4 on the data bus on the Z80 side (the data bus for the ... controlled by a combination of signals that the Z80 makes when ... prefer to use the original signals. So when (A0 + IORQ + RD ... ). With the black cable, the signals that control the tristate output ...
    Winston Winston October 2010 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…

    ... have verified connectivity of the data bus lines between the CPU and ... br />
    - Hopeful looking RAS signals at all RAM chips (upper ... br />
    - Hopeful looking CAS signals at all 4116 chips. CAS ... 4V square waves on all data bus lines at the CPU.
    Zorn Zorn November 2011 Hardware
  • Joystick interface for divIDEMy first prototype of joystick interface for DivIDE. Work as kempston joystick and must be connect to socked instead EEPROM chip. Final version will …

    ... */A5*A0)
    Data bus connect to ZX bus via resistors 150 Ohm ... connector contain +5V and GND signals and support three fire buttons ...
    velesoft velesoft May 2012 Hardware
  • Timex contended memory timings, the TS2068 kludge board and EXROM at $4000 - $7FFFI haven't seen this documented anywhere yet so I thought I'd share my findings. I've been investigating contended memory timings on the Timex Sinclai…

    ... put the Z80 multiplexed address bus and data bus onto the SCLD/VRAM ... as the cartridge memory or bus expansion device. For reads there ... devices trying to assert the bus; for writes both devices would ... what happens to the VRAM signals RAS1# and CAS1#.

    rga24 rga24 May 2014 Hardware
  • zx spectrum 48k issue 6A boot fail- black paperohh whats wrong with this poor specie .. boot fail,, border white & paper black .. when reset it shows the red lines to indicate that the CPU is cycl…

    ... ULA. checked most of the signals to the best of my ... thinking is that it is data bus problem not addressing so unlightly ...
    mark8bit mark8bit February 2021 Hardware
  • Sync-buzzer, interrupts and general confusionBeen wittering on about this in the Misc group, but thought it was best discussed here. Basically been trying to recreate the Sid-Sound effect from A…

    ... the Z80 will ignore interrupt signals on the /INTRQ pin. Execute ... . However, since nothing drives the data bus when the Z80 is looking ... the Spectrum has on the data bus means the Z80 will consistently ... and put garbage on the data bus when the Z80 is looking ...
    Alcoholics Anonymous Alcoholics Anonymous September 2003 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…

    ... the z80 responds to these signals on its /NMI and /INT ... -up resistors on its entire data bus so that although nothing is ... that put garbage on the data bus when the z80 looks for ...
    Alcoholics Anonymous Alcoholics Anonymous May 2006 Development
  • Spectrum Diagnostics Board - 25th Anniversary projectWell, I said I'd try and get something online about this by today, and I have indeed done so. This web page still needs finishing off (in particular,…

    Many of the signals are somewhat intermittent in nature, ... side) you can check that signals that are supposed to be ... clock, M1 line, address and data bus lines. This can give you ...
    Winston Winston June 2007 Hardware
  • Input/Output on Edge ConnectorI would like to sense a pulse on the data bus via the edge connector, i.e. on or off. How do you decide what port it is on? I would also like to send…

    ... sorts of values on the data bus in IM 2 with devices ... enable pin dedicated to control signals for the port decoder. The ...
    Winston Winston October 2007 Hardware
  • The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…

    ... CS)
    - gating all the signals, so there is only activity ... The Z80 actually samples the data bus on the 3rd T- ... 03 is seen on the data bus (for about 40ns or ... Then F7 appears on the data bus, and sits there usually ... only sample a few signals at a time at ...
    Winston Winston December 2007 Hardware
  • DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…

    ... latched from the address or data bus is no longer there. Or ... resistor to make sure the signals rise fast enough. This would ...
    Winston Winston February 2008 Hardware
  • Group Order of Internal/External Kempston Turbo InterfacesI have contact Velesoft ([url]http://velesoft.speccy.cz/kmturbo-cz.htm[/url]) about the production of internal or external kempston turbo interfaces …

    ... = 16095(#3EDF) 0xxxx1x0 11011111 ( return data of port #7FFD )
    FULLER ... /> D7- always 0
    (all signals on port #1F is active ... 1 / left button
    (all signals on port #7F is active ... />
    K-MOUSE return to data bus correct 8bit low adress (#FF ...
    velesoft velesoft April 2008 Hardware
  • Running TZX off an IDE drive? Or streaming from a NAS?Hello. I know about the DivIDE project, and about the ZX Ethernet project, but not how far they've come or what they can do. So: 1. If I have a squ…

    ... the expected input onto the data bus that is consistent for what ... would be placing on the bus for a high or low ... pins onto the Spectrum's bus when the IN instruction executes ... the RD and M1 CPU signals). When the hardware sees the ...
    Winston Winston September 2008 Hardware
  • Is there any video input on expansion bus?Imagine you want to build a custom display hardware, for instance, to add hardware sprites to display. Is it possible to design such a device so that…

    ... device could snoop the data bus to find out what ... component video signals are available at the expansion bus. You ... with two kind of signals: YPrPb signals if using a ... 48K ULA, or RGB signals if using a 128K ... this, to convert YPrPb signals internally to RGB, and ...
    mcleod_ideafix mcleod_ideafix March 2010 Hardware
  • DivIDE and joystick interfaceWhich joystick interface works with the DivIDE and ZX 48K? I have TurboRAM but it works not correct or blocks DivIDE. Multiface One works with the j…

    ... ....

    Interface use signals D0-D4 for LEFT,RIGHT ... It's OK. Next is signals IORQ and A5 for decode ... interface return on data bus joystick state and will data collision between CPU ... bug in uncomplette connector (some signals absent) for connect divide ...
    velesoft velesoft April 2010 Hardware
  • DivIDE and joystick interfaceWhich joystick interface works with the DivIDE and ZX 48K? I have TurboRAM but it works not correct or blocks DivIDE. Multiface One works with the j…

    ... ....

    Interface use signals D0-D4 for LEFT,RIGHT ... It's OK. Next is signals IORQ and A5 for decode ... interface return on data bus joystick state and will data collision between CPU ... bug in uncomplette connector (some signals absent) for connect divide ...
    Alien 8 Alien 8 April 2010 Hardware
  • divide deviceHi, This is first my first post,so hello to you all I first Spectrum 48k was a Xmas present way back in 1983,best gift ever. Then I moved on to a C…

    ... CPU Z80 value xx to data bus, but some old kempston ... to data bus value with joystick state = collision on data bus. Both data values ... connector:

    1) signals D0-D7 must be connect ... on any kempston interface without data collision. Will work RESIDOS ...
    velesoft velesoft November 2010 Hardware
  • DIVIDE PLUS - ZX bus protectorI make new ZX BUS PROTECTOR for use with DIVIDE PLUS interface. This is very small "convertor" for connection to new ZX BUS connector. PCB contain on…

    ... JOYSTICK interface[/B]. Data collision will disabled via ... /> - ROMCS and both ROMOE signals on ZX 128/+2A/+3 ... ZX BUS on ZX Spectrum. Can work as data ... can't collide on data bus. Enable use allram ... correct without conflicts on data bus. Tomorrow I will connect ...
    velesoft velesoft November 2010 Hardware
  • DIVIDE PLUS - ZX bus protectorI make new ZX BUS PROTECTOR for use with DIVIDE PLUS interface. This is very small "convertor" for connection to new ZX BUS connector. PCB contain on…

    ... sell complete ZX-BUS-PROTECTORS or full package ... /> version 1:
    - protect data bus = enable connect kempston or any ... ROMOE signals)

    version 2:
    - protect data bus = ... /> version 3:
    - protect data bus = enable connect kempston or any ...
    velesoft velesoft November 2010 Hardware
  • Genesis: dawn of a new day, new game from RetroWorks!It's been a long development, but finally we made it. We proudly present the latest game from RetroWorks, Genesis: dawn of a new day. [img]http://ww…

    ... time read CPU from data bus 8bit vector value. Pull ... is connect to system bus. K-MOUSE interface contain ... and IM2 stabiliser. If signals M1 and IORQ are ... CPU read vector from data bus and K-MOUSE send ... via resistors to data bus value #FF (via ...
    velesoft velesoft November 2010 Games
  • Divide+ and joystick interface problemHi! Maybe someone can help me. Any of joystick interfaces which I have doesn't works with Divide+( without joy interfaces works fine.) My joystick in…

    ... br /> bug2: is used only data lines D0-D4, but D5 ... pull-up resistor on joystick signals = bad joystick stability

    data lines for better compatibility with ... can only connect resistors on data bus in your kempston interface or ...
    velesoft velesoft February 2011 Hardware
<1234567…34>

Latest Posts

  • Happy 40th Birthday to the Amstrad CPC464!
    AndyC on 6:29PM
  • Goodbye Z80
    i love the z80s on 6:28PM
  • Another Birthday! The Game Boy Is 35!
    dm_boozefreek on 6:17PM
  • I bought an accoustic guitar. How do you play it?
    Maroc's Other Projection on 6:04PM
  • I am currently watching.....
    Antiriad2097 on 5:05PM
  • European Software Titles with an English version
    harriusherbartio on 12:06PM
  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21

HitBox

Word Docs Hits
data 17.9K 34.5K
bus 4.3K 6.5K
signals 2.1K 2.7K

Related Threads

  • Data bus at interrupt timeIt is "well known" that some peripherals can put values other than 0xff on the data bus at interrupt time, thus meaning that IM2 is slightly more fid…
  • CPU speed controller (SLOMO) + K-MOUSE + JOYSTICK + ZX BUS EXPANSION (3x throught zx bus)Anyone is interested of this hardware ?<br /> [img]http://velesoft.speccy.cz/other/km2016lp3d1.jpg[/img]<br /> <br /> It's horizontal version of K…
  • Quiz VI - Trident on VESA Local Bus....Something to keep everyone busy while Arjun sorts out his caboodle of questions....<br /> <br /> Ok, 12 quick fire questions.. <br /> Some cryptic - …
  • Connecting a data recorder to a +2A?I have a +2A Spectrum, and getting increasingly frustrated by the unreliable built-in data recorder, I decided to start using an external one. <br />…
  • Anarchy (from Hewson) Level Data?Does anyone here have the ability to get hold of the data for all the levels in this game, as I am interested in remaking it for the pc.<br /> <br />…
  • Helter Skelter Level Data?Does anyone know where this is in memory and what the format is?<br /> <br /> I would love to be able to extract the level data for use in a remake, …
  • ZX-BUS?Hmmmm..... While reading Your posts here, I have an impression that various models of ZX Spectrum have various zx-bus ports. <br /> Is that true? <br…
  • 4 Computer Buffs data transmissions on TVAnyone else remember these?<br /> They were transmitted after closedown to tie in with the 4 Computer Buffs TV programme on channel 4 back in the 80s…
  • which games in +3 disk version have more data than equivalent tape version ?I know only two differences:<br /> - Shadow of the Beast +3 disk version has a few static graphics on main menu and between levels<br /> - Thunder Bl…
  • Once again about saving data in emulatorsI have already posted a topic asking how to save data in zx32. Now I have the same question concerning Real Spectrum emulator. I have already found o…

Related Searches

  • floating bus
  • data list from input
  • input data list
  • data list
  • cobra floating bus
  • bubble bus
  • self generated data list
  • fuse tape standart data
  • write data in basic
  • floating bus fix
  • ram data line d0 resistance pull up
  • ram data line d0 resistance
  • data line resistance
  • ram test basic poke peek program data
  • crc data error
  • raw data tzx
  • raw data tzx save
  • fuse raw data tzx
  • dim data
  • data bus ear bit 6

Copyright © 2024 World of Spectrum