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<1…16171819202122…34>
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ... RAS signal to cause the external multiplexors to expose one half ... the time from the last memory access before pulling RAS down ... about to start a video memory read. During that time, the ...
    mcleod_ideafix mcleod_ideafix March 2013 Hardware
  • Multiface +3 AdviceHi, New to the forum after resurrecting my +3 and looking for a bit of advice on the Multiface 3 please. Quite simply is it worth investing in for…

    ... />
    First of all - purchase external 3.5 inch floppy drive ... switches you can convert your external 3.5" drive into A ... your 3.5" diskette into external 3.5" drive and copy ... be loaded to bottom 16k memory.


    128K games ...
    ikci ikci March 2013 Hardware
  • Joystick Interfaces on +2AJust found out that my DK'Tronics joystick interface doesn't want to play with my +2A (black). The Kempston port works OK, but not the Sinclair port…

    ... are incompatible with:
    - external keyboard interfaces (or keyboad based ... SINCLAIR2, CURSOR, etc...)
    - external interfaces with external memory designed for orig ZX48 ... via resistors and external data 1:1 with external CPU. External device will ...
    velesoft velesoft April 2013 Hardware
  • File comparitorI thought Taper might do it but its not quite what I was after. Unless I misunderstood that shows if tapes are identical or not but not the differenc…

    ... fit into memory. This is the controlling routine; the external GOSUBs refer ...
    Battle Bunny Battle Bunny April 2013 Sinclair Miscellaneous
  • Keyboard scanning routines / techniques?What keyboard scanning routines or techniques do people use? I'm looking to write something which doesn't rely on the ROM-based keyboard scanner, an…

    ... preemption, relocatable executables, slab allocator memory handling (to reduce fragmentation), decoupling ... kernel implementation (to allow different memory mappings to be used without ... debugging, I've implemented an external debugger which takes a snapshot ...
    u6c87 u6c87 May 2013 Development
  • Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …

    ... save to any external media (other than dumping the memory to PC ...
    utz utz May 2013 Development
  • 48k+MF1+plusD problemThis is annoying, the setup I want to use is a rubber 48k, Multiface 1 (mainly because of the joystick port) and a +D, however, the NMI doesnt bring …

    ... external memory. Both your devices use own external memory and both devices can this memory ...
    velesoft velesoft June 2013 Hardware
  • Problems using Save"program" Line 10 in real +2A!!I typed a loader for a program and when I use the typical Save"program" line 10, the Spectrum just gives me "0 ok, 0:1" What can it be???? I dont w…

    ... you don't have an external disc drive connected to the ... one touched a part of memory stack, or contained machine code ... active or remained in RAM memory, a NEW instruction shouldn't ...
    Neil Parsons Neil Parsons June 2013 Sinclair Miscellaneous
  • Problems using Save"program" Line 10 in real +2A!!I typed a loader for a program and when I use the typical Save"program" line 10, the Spectrum just gives me "0 ok, 0:1" What can it be???? I dont w…

    ... you don't have an external disc drive connected to the ... one touched a part of memory stack, or contained machine code ... active or remained in RAM memory, a NEW instruction shouldn't ...
    Ivanzx Ivanzx June 2013 Sinclair Miscellaneous
  • Testing a +2I recently picked up a non functioning Spectrum +2 Grey (Issue 3 board?), and am just beginning to go through and see what needs to be done to it. I …

    ... , detach the powerlines from memory and reattach the chips one ... If machine boots, continue with memory testing
    b. If ... capacitors

    3. Check memory function
    a. Use diagnostic ... 's diag cartridge in an external interface)

    So ...
    bverstee bverstee June 2013 Hardware
  • Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…

    ... ]
    The jumptable in slow memory will lead to the "snow ... " and may, ultimately, lead to memory corruption. And you cannot use ... be the case when some external hardware is connected.

    introspec introspec June 2013 Development
  • ZX-Spectrum 16KWanted working 16K machine for reasonable price I'm located in NY, U.S.A. Thanks!

    What is your price?

    P.S. Yes, I have some project in mind :)
    I want to build external memory extender with some additional features ;)
    Shaos Shaos June 2013 Wanted
  • esxDOS v0.8.5 released (with TR-DOS emulator)Yup, you read right! Now with TR-DOS emulation! More info and download here: [url]http://www.esxdos.org/[/url] Enjoy :)

    ... use port #E3 for DIVIDE MEMORY paging (compatible with original divide ... for all other external devices. Also memory acces for external devices will disables ... if DIVIDE memory is connect ...
    velesoft velesoft July 2013 Announcements
  • C.G.D - Classic Game Designer[b]UPDATE: August 07, 2013 AN UPDATED VERSION OF CGD IS NOW AVAILABLE, DETAILS HERE: [url]http://www.worldofspectrum.org/forums/showpost.php?p=7155…

    ... lot easier to use an external, specialized tool to do it ... wouldn't save much but memory is not really a problem ...
    R-Tape R-Tape July 2013 Brand new software
  • New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…

    ... for make own joystick interface, external memory, k-mouse, etc...
    [img ...
    velesoft velesoft July 2013 Hardware
  • DivIDE black editions availableI have about 6 more DivIDE black editions ready, and will finish more this week. [B]DivIDE 57c BLACK edition including ESXDOS 0.8.5 and 1GB CF card[…

    ... about PLUS D interface ?
    - memory layout (I know only about ... rom can be replaced with external memory 8kB rom + 8kB ram = very ... similar as DIVIDE)
    - memory paging (I need know mechanism ...
    velesoft velesoft August 2013 Sales
  • DivIDE black editions availableI have about 6 more DivIDE black editions ready, and will finish more this week. [B]DivIDE 57c BLACK edition including ESXDOS 0.8.5 and 1GB CF card[…

    ... D memory layout is always:
    0-8191 = 8kB external rom ... = 8kB external ram.

    If PLUS D memory is connect ... DIVIDE (this disable automatic divide memory connection). PLUS D rom ... only as I/O ports (external memory access is ignored). Then PLUS ...
    velesoft velesoft August 2013 Sales
  • Hardware description - PLUS D interfaceThis new thread will contain onformations of different ZX devices. Some devices contain manuals, schematics or firmware for some chips, but some peop…

    ... (from same adress is connect external memory):
    - #08 (rst8 = syntax ... layout:
    0-8191 = 8kB external rom
    8192-16383 = ... 8kB external ram.

    If PLUS D memory is connect ... [/B] = disconnect PLUS D memory
    (addressing of port ...
    velesoft velesoft August 2013 Hardware
  • Hardware description - PLUS D interfaceThis new thread will contain onformations of different ZX devices. Some devices contain manuals, schematics or firmware for some chips, but some peop…

    ... .oe = vcc
    ; disconnect external memory after OUT x110011x,anyvalue (#E7 ... )
    ; or connect external memory if CPU read instruction byte ... oe = vcc
    ; after memory connection is from #0000-#1FFF ... possibility connect PLUS D memory after read port #E7 ...
    velesoft velesoft August 2013 Hardware
  • Hardware description - MB-02+ interfaceOn this thread will soon released info about MB-02+ idisk interface ( memory paging mechanism, list of ports, addressing, MB IDE, schematics, etc... …

    ... / log.1 enable writing to external memory
    D6 - log.1=connect ... =0 and D6=0 then external memory is disconnect and ZX rom ... .
    - OUT 23,0 - disable external memory and connect ZX rom
    velesoft velesoft August 2013 Hardware
  • DivIDE+ with SpectranetHi all, I've recently bought both a DivIDE+ and Spectranet from RWAP and I was wondering if it's possible to use them both together. I have a 48K+,…

    ... . This modification disable any other external memory access and all next devices ... only as I/O ports (external memory in spectranet is disabled).
    memory paging as original DIVIDE and ...
    velesoft velesoft August 2013 Hardware
  • Didaktik Gama and M manualsI?m looking for manuals for the Czech Spectrum clones Didaktik Gama and M. Thought this would be an easy task, but I couldn?t find any user or servic…

    ... (without any internal modifications) via external memory upgrade to 100% compatibility with ...
    velesoft velesoft August 2013 Hardware
  • New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…

    ... is connect ZX ram and external ROMOE1 and ROMOE2 signals are ... But old ZX devices with external rom can't know if ... 0 can connect external memory and data collide between external device and +3ULA ... for +3 allram memory and data from external device can be ignored ...
    velesoft velesoft August 2013 Hardware
  • New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…

    ... is connect ZX ram and external ROMOE1 and ROMOE2 signals are ... But old ZX devices with external rom can't know if ... 0 can connect external memory and data collide between external device and +3ULA ... for +3 allram memory and data from external device can be ignored ...
    Shaos Shaos August 2013 Hardware
  • INTERFACE 2 - light versionSmall interface (adapter) compatible with INTERFACE 2. Contain only slot for IF2 cartridges and reset button (for rubber speccy). Not contain joystic…

    ... (ZX128 rom replacement, external memory upgrade for ZX16, MB02 memory, D/A converters ...
    velesoft velesoft September 2013 Hardware
  • INTERFACE 2 - light versionSmall interface (adapter) compatible with INTERFACE 2. Contain only slot for IF2 cartridges and reset button (for rubber speccy). Not contain joystic…

    For external memory upgrade is also good this ... modified A15 line for next external devices for disable memory access.
    velesoft velesoft September 2013 Hardware
  • New multi-interface for ZXI have in development new interface for ZX Spectrum. PCB size is similar as K-MOUSE interface and on board is CPLD (programmable logic), up to 1MB st…

    ... 1/128/3, K-MOUSE, EXTERNAL MEMORY EXPANSIONS, SOUND CARD, DMA, etc ...
    velesoft velesoft September 2013 Hardware
<1…16171819202122…34>

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HitBox

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external 4K 5.3K
mbo2 2 2
memory 21.8K 32.5K

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