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<1…22232425262728…34>
  • Connectors for ZX BUSHere is photos of three different versions of connectors used on ZX interfaces: As you can see, each connector use different shape of contacts. Firs…

    ... /> Thickness of ZX board (system bus connector) is about 1.5 ...
    velesoft velesoft October 2013 Hardware
  • Emulating a +2A with floating bus modBefore I start hacking Fuse's source... Does any existing emulator have an option to behave as a +2A with the [URL="http://www.secarica.ro/html/plus…

    Before I start hacking Fuse's source...

    Does any existing emulator have an option to behave as a +2A with the [URL="http://www.secarica.ro/html/plus3_hardware.html#inFFport"]floating bus modification[/URL]?

    -Stephen
    stephenw32768 stephenw32768 October 2013 Emulators
  • Tricky ZX RepairHello guys, This time I put my hands on a very nice Issue 3 16K, upgraded to 48K. To bertter explain "nice", it is absolutely mint, not a scratch on…

    ... switch on the scope. Floating bus seems to behave okay. DMM ... consistent resistance reading on all data bits, between both power rails ... 's nothing else on the bus. Logic levels on the Z80 ...
    Falco-F8L Falco-F8L December 2013 Hardware
  • Head Over Heels sprite dataHi Does anyone know how I can get the sprite data out of HoH? I'm programming an iso engine and I need some interesting sprites to animate... unfort…

    Hi

    Does anyone know how I can get the sprite data out of HoH? I'm programming an iso engine and I need some interesting sprites to animate... unfortunately I'm not terribly good as a graphic artist!

    Thanks

    JonB
    JonB JonB December 2013 Development
  • DIM DATA and the likeSo...I'm trying to work out arrays in BASIC a bit more and have knocked up the following quick test bed to fiddle about with before trying anything m…

    ... I am pretty happy that DATA is used to "fill up ... READ x(n)
    70 DATA 1,2,3,4,5 ...
    Wookiee Wookiee January 2014 Sinclair Basic
  • 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…

    ... IR address put on the bus by the CPU interferes with ... . Therefore the ULA reads the data from an unexpected memory location ... in the last 4T the bus is idle (0xFF). After that ... memory, so it leaves the bus idle for the remaining 228 ...
    Hikaru Hikaru January 2014 Development
  • Quality of component video signals on 48K expansion portHi, What's the quality of the component video signals on the 48K Spectrum expansion port like? Could I directly connect them to three phono sockets…

    ... quality of the component video signals on the 48K Spectrum expansion ...
    mark_k mark_k January 2014 Hardware
  • PC to +3 communicationsHi I'm going to explore the abilities of my +3 to communicate with a PC. The "natural" ways to do that would be via serial or parallel link. I've b…

    ... it haven't all standard signals) and if there is something ... parallel link, it seems that data bits are output only, and ...
    Zup Zup March 2014 Hardware
  • 4294967296 pseudo output portsIn an effort to avoid any hardware conflicts with the clashbasher interface I've been looking for an alternative to using the spectrum's ports for ou…

    ... ports for outputing configuration data from the spectrum to ... no way to input data with it as yet. ... and write your own data to the spectrum memory. ... few bytes of config data from the spectrum to ... sits passively on the spectrum bus. So the output only ...
    Basher Basher March 2014 Hardware
  • Loading data from 128 memoryAfter all these years I have come across the LOAD! in 128 basic for storing/restoring data in the 128 memory. How do I go about implementing this in…

    After all these years I have come across the LOAD! in 128 basic for storing/restoring data in the 128 memory.

    How do I go about implementing this in machine code?

    Thanks in advance...
    daveysludge daveysludge March 2014 Development
  • Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…

    ... 's placed on the address bus during execution of HALT, beyond ...
    zub zub March 2014 Hardware
  • Read Data from memoryHi there. Not been on this scene for a long time. Does anyone know how to do a routine to read data from memory(peek..etc) rather than using lines of…

    ... do a routine to read data from memory(peek..etc) rather ... than using lines of data in basic...

    My ... /> 40 next f
    50 data 1,2,3,4,5 ...
    davepierce07 davepierce07 May 2014 Sinclair Basic
  • New version Emulator ZEsarUX-1.0Hi I have uploaded a new version of my Spectrum/ZX80/ZX81 emulator. This is a major stable version, with real timing for all the models and with hi-…

    ... bus port emulation
    Added option to load and save binary data ...
    chernandezba chernandezba May 2014 Emulators
  • bubble bus[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0011630[/url] was never released, that comes direct from the owner .. "we never put out any ad…

    ... , prior to being called bubble bus , it was known as "the ...
    fog fog June 2014 Infoseek database
  • ZX-FPGA dev boardI've been sporadically working on this: [IMG]http://photo.alioth.net/tmp/spectradvi.png[/IMG] It's an FPGA dev board for the Spectrum. It uses a CP…

    ... voltage levels between the ZX bus and the 3.3 volt ... be used for code or data. The FPGA also has a ...
    Winston Winston June 2014 Hardware
  • browsing/data usage Qroughly how many MBs of data would you expect to have downloaded after 1 hour of casual web browsing - no vid/music streaming or file-downloading, ju…

    roughly how many MBs of data would you expect to have ... 've apparently used 30MB of data which seems high?

    def chris def chris June 2014 Chit chat
  • Some hardware from JiiiraFor those who haven?t discovered [B][URL="http://jiiira.ajetaci.cz/speccy_hw/index_eng.xhtml"]my webpages[/URL][/B] yet: ;-) [B][URL="http://jiiira…

    ... ][/B] is a ZX Spectrum bus expansion board containing two (for ... is fully addressed (all address signals A0 to A7 decoded), thus ...
    Jiiira Jiiira July 2014 Hardware
  • MicrodriveHi, I'm trying to emulate the microdrive, and to analyse the data structure on the cartridges. But my measurement of the timing of the signals differ…

    ... microdrive, and to analyse the data structure on the cartridges. But ... of the timing of the signals differs from those described by ...
    HZJ HZJ August 2014 Hardware
  • DivMMC + ESXDOSHowdy, I'm trying to implement DivMMC and ESXDOS on my FPGA-based Spectrum compatible, ZX Prism. Could anyone tell me under what bus conditions the …

    ... anyone tell me under what bus conditions the ESXDOS ROM/RAM ... , NMI and RST8, but what signals do I need to check ... , M1 and RD low, Address bus=0x0008 would be my guess ...
    JeffB JeffB August 2014 Emulators
  • Tinkering with DMASo, some afternoon tinkering... [img]http://photo.alioth.net/tmp/dma_small.jpg[/img] The purpose of this all is to see what's possible using the Xi…

    ... chip takes control of the data and address buses and writes ... has taken control of the bus, written to screen memory, then ...
    Winston Winston November 2014 Hardware
  • Grammar-based data compressionI'm working on a game for the 48k Spectrum but want a way to compress a lot of screens into a small space, so I'm looking into data compression. Each…

    ... , so I'm looking into data compression. Each screen is an ... with a lot of common data between them, so I'm ...
    i love the z80s i love the z80s May 2015 Development
  • My experience with a ZX Spectrum clone called Elwro 800 JuniorAfter a long break in using this forum (modellrailroading is my main hobby) I'm back and want to tell something about an interesting ZX Spectrum clon…

    ... to "Juniors" is the EPROM data retention time. I checked the ... some mod to the original signals in RGB port. Together with ...
    brian-82 brian-82 August 2015 Hardware
  • Odd joystick interface / startup behaviourI was experimenting with setting up a machine to run [i]Bomb Munchies[/i] at the weekend and was surprised by a particular condition that caused my +…

    ... try to put different data onto the bus? And is there anything ...
    joefish joefish August 2015 Hardware
  • Spectrum +2A floating bus portHi As I discovered in the past, Spectrum +2A (and probably +3) do have floating bus port. But it is not shown on all unused ports, only on some po…

    ... probably +3) do have floating bus port. But it is not ... +2A does not have floating bus port, but it's incorrect ...
    chernandezba chernandezba January 2016 Hardware
  • Elite - Save data complete map[code] $0000 Commander Name $0001 Commander Name $0002 Commander Name $0003 Commander Name $0004 Commander Name $0005 Commander Name $00…

    ... 4 'NULL' variables in the data, which aren't addressed directly ... flag as seen in the data above.

    The last ... progress and overwrites the unread data. Since the competition is long ... 'security code' in the save data doesn't accomplish anything I ...
    Ersh Ersh February 2016 Games
  • Publishers logos and biosAs we are getting more development done, we are looking at extra details not currently available, so will be creating new categories asking for submi…

    ...
    BT
    Bubble Bus
    CDS
    Cloud ... br /> CodeMasters
    Bubble Bus Software
    Anirog
    ... " - no "Games" text)
    Data East
    Gandslam
    Mastertronic ... br /> Bubble Bus Software - 02
    Bubble Bus Software - 03 ...
    Lee Fogarty Lee Fogarty April 2016 Publishers
  • CPU speed controller (SLOMO) + K-MOUSE + JOYSTICK + ZX BUS EXPANSION (3x throught zx bus)Anyone is interested of this hardware ? [img]http://velesoft.speccy.cz/other/km2016lp3d1.jpg[/img] It's horizontal version of K-MOUSE interface(p…

    ... + joystick interface + zx bus expansion (3x throught zx bus) + external reset button ...
    velesoft velesoft April 2016 Hardware
  • R registerI'm cross-posting this as a spin-off of a [url="http://www.worldofspectrum.org/forums/discussion/52748/zx-spectrum-cartridges/p2"]thread in "Hardware…

    ... R, A instruction.
    The data in the refresh counter is ... lower portion of the address bus along with a refresh control ... is dumped on the address bus lower byte, just after fetch ...
    RMartins RMartins June 2016 Emulators
  • Data-Assette ZX-99 Tape Control System - Very Rare Untested - Sinclair ZX-81Data-Assette ZX-99 : : RARE : THE ZX-99 is a control system for up to four different tape recorders which also has an RS232 tape interface for ru…

    Data-Assette ZX-99 : : RARE :
    < ...
    Neil79 Neil79 August 2016 Sales
  • Saving and loading data in assembly.I want to add a save and load feature to an project I'm working on. Since it's not that much data in size I thought I'd use the ROM functions, but ho…

    ... it's not that much data in size I thought I ...
    Ersh Ersh August 2016 Development
<1…22232425262728…34>

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  • 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…
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