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  • z80 commands timeshi! I need site with z80 commands mashine times. I remember, I saw one as table, maybe in .cc domain, but pity forgot link. for example LDI take 16 …

    I always think this table is one of the best ... :

    [url]http://www.z80.info/z80code.txt[/url]
    Arda Arda July 2014 Development
  • z80 commands timeshi! I need site with z80 commands mashine times. I remember, I saw one as table, maybe in .cc domain, but pity forgot link. for example LDI take 16 …

    ... ;778960]I always think this table is one of the best ... :

    [url]http://www.z80.info/z80code.txt[/url][/QUOTE ...
    MatGubbins MatGubbins July 2014 Development
  • CMWC random number generator for Z80Seeing the interest regarding the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=23070"]Xor-Shift random number generator for Z80[/URL]…

    ... I have to initialize the table with bytes that satisfy this ... x-es == size of the table), there is no dependency among ... ]
    Do you have something z80 at hand for generating 15 ...
    Patrik Rak Patrik Rak September 2014 Development
  • Spectrum preservation/clean up questions.I&#8217;m sorting out my 5 Spectrums trying to make them look a bit better, and to package them up how they should be, and to get them to be reliable…

    ... placed on the edge of table. As long as I don ... spectrum and checked that the Z80, Rom, and voltage regulator heatsink ...
    Renegade Renegade November 2014 Hardware
  • CMWC random number generator for Z80Seeing the interest regarding the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=23070"]Xor-Shift random number generator for Z80[/URL]…

    ... in some cases (subject to table placement)[/QUOTE]

    Good ... -Spectrum (it would require a table located above 65528, thus part ... this could happen in other Z80 systems. I never thought about ...
    Einar Saukas Einar Saukas February 2015 Development
  • CMWC random number generator for Z80Seeing the interest regarding the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=23070"]Xor-Shift random number generator for Z80[/URL]…

    ... rnd_cy are added to the table) and accepts a pointer to ... /cmwc-random-number-generator-for-z80
    ;
    ; =============================================================

    SECTION ...
    Alcoholics Anonymous Alcoholics Anonymous May 2015 Development
  • Who wants to play with my Willy?While cleaning up my PC a few weeks ago, I stumbled across an old Jet Set Willy mod I started back in the early 2000s. Although I don't quite have th…

    ... saving the file as SNA, Z80 or +3DOS in JSWED, saving ... it as Z80 in Spectaculator and then loading ... in JSWED, apparently the item table and some of the guardian ...
    jetsetdanny jetsetdanny June 2015 Games
  • Floating Point Package Math48<br>I came across a neat little floating point package for the z80 and I'm adapting it now to work with z88dk and sdcc.&nbsp; There is an interesting…

    ... what works well on the z80 (it's natural to ... 48-bit float on the z80).[/quote]
    I’d ... in the powers-of-ten table: that alone surely makes ... a fix, or a recalculated table with different precision?
    ... Floats are slow on the z80, though I believe faster ...
    zub zub July 2015 Development
  • Ziloghino - Arduino like Z80 systemHi, I found this board on Kickstarter, the Ziloghuino. It's an Arduino like Z80 system extensible with hardware shields. With some effort maybe s…

    ... as simple as a basic Z80 system, it should have been ... what it brings to the table in terms of implementation, features ...
    RetroTechie RetroTechie July 2015 Hardware
  • ZERO Emulator - BugsI have been using Zero emulator to experiment a few routines in assembly, since it has a somewhat usable debugger. However I believe I found a few b…

    ... />
    That's the correct Z80 behaviour, DEC BC and all ... , I have been reading Zilog Z80 Manual, just to refresh my ... XOR instruction, presents the same table as OR, and forgot to ...
    RMartins RMartins July 2015 Emulators
  • RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…

    ... WOS. 95-99% will be z80 source, But nice to see ... of each character in one table, every byte #2 of ... each character in one table, etc... It just simplifies ... may have sped up my Z80 code a little more. It ... But you know how the Z80 is... smaller code isn't ...
    JamesD JamesD September 2015 Development
  • How did bank switching work on the 128K Spectrums?I'm new to Z80 and ZX Spectrum. So I was wondering how the 128+ models managed to work with more than 64K of memory? I'm somewhat familiar with h…

    ... ram is shared between the z80 and the ula so a ... simultaneous access by the z80 slows it down momentarily and ... cause crashes if the interrupt table is located in a contended ...
    Alcoholics Anonymous Alcoholics Anonymous October 2015 Hardware
  • Drawing some spritesI figured I want to draw some sprites. My target was to do a 16x16 masked sprite. There's no clearing here, just drawing the sprites. My first ite…

    ... than (DE) addressing, http://www.z80.info/z80code.txt claims that ... get rid of the yoffset-table accesses.. I think I'll ...
    Sol_HSA Sol_HSA November 2015 Development
  • NTSC Compatibility?Correct me if I'm wrong, but wasn't the Timex 2068 the only NTSC clone built of the ZX Spectrum? And I use clone lightly... From what I underst…

    ... (8x1 attribute clash) then the Z80 would need to wait for ... horizontal blank, alter the attribute table for that line. Why would ... ? IIRC, the only way the Z80 (or any software) could possibly ...
    cbmeeks cbmeeks December 2015 Games
  • Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …

    ... is used for synchronisation between Z80 and Floppy controller. That is ... tables only the main table and the disk table are copied in ...
    roko roko December 2015 Hardware
  • z88dk v1.99A Release Candidate[b]Z88DK VERSION 1.99A RELEASE CANDIDATE[/b] Download from: http://nightly.z88dk.org/Releases/ The release candidate will be available for te…

    ... wiki/doku.php?id=libnew:z80#interrupt_service_routines"]z80.h[/url],[url="http ... little bit. The balloc table size can be specified with ... . The address of the table probably has a different name ... multi-threading features. The block table may become part of a ...
    Alcoholics Anonymous Alcoholics Anonymous December 2015 Brand new software
  • Did you choose to have a Speccy or did it just happen that way?A strange question I know, but, the reason I ask is that when we (my family) were looking to buy a computer non of my mates had computers and non of …

    ... !), and first started coding in Z80 (writing code on paper, converting ... a 48K on the kitchen table sitting it on tin foil ...
    RobeeeJay RobeeeJay January 2016 Games
  • (Collected) Darkhog's noob question about z80 assemblySince when I'm learning new language or library, I tend to ask lots of stupid (for any advanced person) questions and I don't want it to have mess up…

    [quote="Darkhog;52514"]
    - Regular IF z80 equivalent. e.g. If A
    GReW GReW April 2016 Development
  • Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…

    ... look at some of the z80 follow ups this penalty ... it's slow on the z80, programmers take great care ... />
    [code]
    ; h = shift table
    ; de = sprite def (mask ... libsrc/_DEVELOPMENT/arch/zx/graphics/z80/asm_zx_pattern_fill.asm?revision=1.9 ...
    Alcoholics Anonymous Alcoholics Anonymous April 2016 Development
  • A z88dk + sp1 demo (with source)Since nowadays people are still wondering about how difficult it is to make something in z88dk, I thought I just put a very simple demo to show how e…

    ... maxsprites = 10;


    // Table Holding Movement Data for Each ...
    Alcoholics Anonymous Alcoholics Anonymous June 2016 Development
  • Database model ZXDBRecently, I have been trying to figure out how to provide my contribution to whoever takes over WoS archive rework next... So I came up with this: …

    ... filetypes TAP, TZX or Z80 should be displayed inside ... supported! Take a look at table "roletypes".

    table "filetypes". This information deserves ... misunderstood how this table works?

    Table "downloads" ...
    Einar Saukas Einar Saukas July 2016 Announcements
  • New Game: Vallation.Okay, this has been hinted at by both Redballoon and me a couple of times, but the damn thing is finally done now. :-D [b][url="http://tardis.dk/w…

    ... and completed it, saved a .z80 file, reloaded it to keep ... is eating away at a table/stack pointer. Tried a few ...
    MatGubbins MatGubbins July 2016 Games
  • Mastering flagsI'm little lost when different flags are set/reset after logic operations, and what conditions must be met. For example, [code] ld a, MODE…

    The parity flag is set when the result has an even number of bits set.
    It's always nice to have a mnemonics table at hand for this kind of stuff. For example, http://www.z80.info/z80flag.htm deals specifically with flags.
    utz utz September 2016 Development
  • Optimized (in size) Z80 simulatorI am evaluating Z80 simulators to try to create a tool to analyse z80 programs. I'd like to start with a simple register coverage tool and t-state cy…

    ... by "shortest" :)

    Most Z80 emulator cores are optimized for ... in a single table here: [url="http://www.z80.info/decoding.htm ... "]z80.info/decoding.htm[/url ... so you can extract the Z80 core and do what you ...
    GReW GReW September 2016 Development
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