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  • Border Tron vector tableI've been trying to use the Border Tron border creator, but the vector table is created where code to my game is at (FE00 I think), how would I go ab…

    ... have a location, tell the z80 about it by loading the ... same byte, say, X. The z80 will jump to address x ... +x on interrupt. The table contents you probably won't have ...
    Alcoholics Anonymous Alcoholics Anonymous December 2013 Development
  • Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…

    ... screen.

    Possibly the Z80 CPU? I noticed pin 26 ... on the z80 (reset) goes to IC15 pin ... that a bad or missing z80 left random blocks on the ... because it will display the contents of ram without the z80.
    guesser guesser December 2013 Hardware
  • Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…

    ... Z80.

    Was me being lazy and not reading the initial ...
    DEATH DEATH December 2013 Hardware
  • ROM replacement using 28C256 EEPROMThought I'd share a quick project I knocked up in order to use a 28C256 EEPROM in place of the standard 23128 ROM in the Spectrum. The connections a…

    ... are in sync when the Z80 CPU reads from memory.
    Z80 CPU does an IN "read ... Z80 CPU still drives A8 to A15 with "something", either the contents ... of the Accumulator, or the contents of Register B ...
    1024MAK 1024MAK December 2013 Hardware
  • Graphics questionHello. I was wondering, does anybody here know of a method to display a large (as in, the better part of the screen) bitmap/raster image using ZX Sp…

    ... doing the equivalent of a Z80 LDIR using only ZX BASIC ... means you can copy the contents of the entire screen). It ...
    chev chev December 2013 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…

    ... such that HSB=HSB, LSB=contents of R. But, even if ... do is to adjust the initial delay (from the beginning of ...
    Hikaru Hikaru January 2014 Development
  • New Game looking for artistsHey ya'll I've started on my second game, an Aztec themed shooter. I'm new-ish to the Z80 coding scene, but as you know you can only really learn th…

    ... to ask for art at initial stage of the
    project ... for me. I really like Z80 machine code, and hope I ...
    Atari_Jetman Atari_Jetman February 2014 Development
  • LDI questionWhen using LDI (or LDD) is it possible to access the value that is transfered from (HL) to (DE), or does the Z80 use an internal data cache to store …

    ... ) to (DE), or does the Z80 use an internal data cache ... assume you want to swap contents from (HL) > (DE) and ...
    Dr BEEP Dr BEEP March 2014 Development
  • Z80 Asm EditorHi, I think this goes in here but if not then the mods can move it.... :) I have been knocking up a multi-tabbed, customizable docking editor for w…

    ... ://dl.dropboxusercontent.com/u/77288/Z80%20Asm%20Editor/pr7.png[/IMG ... files of a specific type (z80/65xx/text/680x0/include)
    [YES, EVENTUALLY] - Display .tap file contents
    [MAYBE] - T-state display ...
    polomint polomint March 2014 Development
  • How did you learn to code on the Spectrum?Got to be honest, as much as I wish I did, I don't know anything about programming. I had a Spectrum (+2 and then +2B) when I was a kid, and my prog…

    ... that info to learn about Z80 coding... But I never did ... . If you look at the Z80 instruction set, you'll notice ... case), and then storing the contents of the 'a' register into ...
    LuMan LuMan March 2014 Development
  • Spectrum screen layoutSeeing the thread on displacement I was wondering why the spectrum had the stupid screen split into three sections and the addresses for each section…

    ... your port of BBC Basic (Z80) to use it. :)[/QUOTE]BBC ... the ZX ROM, and the initial CLS attaches stream &FE ...
    Jonathan Harston Jonathan Harston May 2014 Sinclair Miscellaneous
  • Fast and easy read/write of attributes?What are the fastest or easiest ways to check the attributes of tiles on the screen, in BASIC? It seems to be a great way of storing object info. …

    ... machine code to use the Z80 bitwise operators using the method ... .uk/~jg27paw4/pourri/0-surc-contents.htm
    ]Compendium[/url]. It ...
    Battle Bunny Battle Bunny June 2014 Sinclair Basic
  • Basic program malfunctionHello. Please does anyone know why this basic program 10 LET x=0 20 LET x=x+0.1 30 print x 40 if x<>1 then goto 20 50 STOP does not properly work o…

    My initial STR$ idea was just a ... .uk/~jg27paw4/pourri/0-surc-contents.htm]Spectrum Utility Routines Compendium ...
    Battle Bunny Battle Bunny June 2014 Sinclair Basic
  • Chloe 280SEHi all, Could somebody tell me how far this project is to being complete? [url]https://github.com/cheveron/sebasic4/wiki/Chloe-280SE[/url] Im ver…

    ... only two years after the initial release of the Spectrum.
    Z80 and extra RAM.

    retrogod retrogod July 2014 Development
  • Opening my new game projectHi I am working to a new game (tentatively called "Donkey Kong Reloaded Done Better"...i was not happy with the graphics of Donkey Kong Reloaded) whi…

    ... few enemies (I tried the z80 file).
    The meteorites look ... speed..
    Seems like the initial approaching of your ship to ...
    hikoki hikoki August 2014 Announcements
  • Machine Code in 30 minutes - car gameWotcha folks, 30 years on and I'm still struggling with Machine Code. I'm going through the 30-minute tutorial on the Chuntey blog and it's all made…

    ... '(ing) the Accumulator with the contents of the C register ...which ... thing as ports. Spectrum has Z80 processor. This processor can read ... made a nasty mess with Z80 ports. I won't go ...
    Ralf Ralf August 2014 Development
  • Please explain Spectrum FPGA-clones to meI've been using the great ZXDS-emulator on the DS XL so far, which is great. But I kinda missed toying around with hardware. I've tried bidding on a …

    ... in them? Were the initial 48ks the only "real ... Spectrum ULA and the Z80 could have been implemented ... be a Spectrum ULA or Z80.

    ... perfect FPGA implementation. The Z80 also saw at least ... instruction, whereas on the CMOS Z80 this is reliable.
    ...
    Alcoholics Anonymous Alcoholics Anonymous November 2014 Hardware
  • 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…

    ... it without slowing down the z80 or suffering contention. I was ... would happen is the remaining contents of the serial flash would ...
    Winston Winston November 2014 Hardware
  • SkoolKit 4.2SkoolKit 4.2 has been released. SkoolKit is a set of command line utilities for disassembling Spectrum software, into ASM format or into a bunch of …

    ... /> I'd check that the contents of your snapshot (starting at ... ]sna2skool.py -s 24100 snap.z80[/code]
    should look about ...
    SkoolKid SkoolKid December 2014 Announcements
  • +3e simple ide interfaceHi guys, I want to make a +3e with my +2a. I'm thinking of making the simple 8bit ide interface (internal) and connecting it to a 40 pin ide to sd r…

    ... socket. The rest, including the z80 socket is just held in ... the PC and load its contents into fuse. Now I just ...
    Lost Lost December 2014 Hardware
  • Testers for new z88dk clibA long (long, long, long) time ago a few people offered to help test the new clib in z88dk. Much time has passed since then and I won't hold people,…

    ... 'm not sure where the initial location of the stack is ...
    {
    uint8_t jp; // 195 = z80 jump instruction
    void *fzx_draw ...
    Alcoholics Anonymous Alcoholics Anonymous February 2015 Development
  • Rom questionHi Can .rom files be viewed? I am curious to what the .rom file looks like. I saw some versions that have been modified and have source code to vie…

    The ROM is just a z80 machine code binary, so unless ... you are a Z80 just looking at the data ... built in which disassembles the contents of memory (including the ROM ... you see what instructions the Z80 is actually running, but if ...
    guesser guesser February 2015 Emulators
  • Is it possible to save a mounted TAP game back to tape, via DivMMC?Hi guys,<br><br>Does anyone know if there is a way to save a mounted TAP game back to a cassette tape via DivMMC?<br>I asked Ben (DivMMC creator) by …

    Z80 is a snapshot so it' ... />
    TZX do hold the contents of a tape in a ...
    guesser guesser June 2015 Hardware
  • What is the Sinclair ZX Spectrum Vega and what does it mean?Just stumbled upon this Indiegogo page following a tweet from SpeccyNews [url]https://www.indiegogo.com/projects/sinclair-zx-spectrum-vega[/url] it…

    ... be able to expand the initial games bundle by using a ... SD card to record TAP, Z80 and SZX files on it ...
    Alessandro Grussu Alessandro Grussu July 2015 Sinclair Miscellaneous
  • Baffo JonesIt is a small game inspired to Pitfall (a way to make things right after that hideous Pitfall III i did a while ago) Did not put any music on it (a…

    ok i made a version (Baffo Jones for real) which has lives going down instead of up (and the Baffo jones 76.z80 can be opened to increase the number of initial lives)
    Just in case ....
    gabriele amore gabriele amore August 2015 Brand new software
  • Game development guidesHello all, I want to get into game development for the ZX Spectrum and would like to know where I can find some helpful guides. I've looked around t…

    ... turned into a table of contents.

    I started to ... here), data_user (assign non-zero initial ram data here), bss_user (assign ...
    Alcoholics Anonymous Alcoholics Anonymous August 2015 Development
  • Oh MummyA game many CPC owners are familiar with as it came free with the £100 software pack withe CPC 464. A fun if limited little game. So when Amstrad …

    ... the CPC. Indeed porting the Z80 code should have been trivial ... BASIC loader which displays the initial "loading screen" with the flashing ...
    Lee Tonks Lee Tonks September 2015 Games
  • z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…

    ... and how to program the z80 by Roday Zaks. The way ... .
    ld (xcoord),a ; set initial x coordinate.
    ld a ...
    antonyjones101 antonyjones101 September 2015 Development
  • New Game: The Order of MazesI'm pleased to announce my first full game release since Flynn's Adventure in Bombland 4 years ago. It is called The Order of Mazes and you can downl…

    ... things like intersections, chests and contents, where the stairs are etc ... -shift-random-number-generator-for-z80/p1"]Patrik Rak's Xor ...
    TomD TomD October 2015 Brand new software
  • A few hardware questions regarding Z80 and eZ80Hi Guys, Maybe some of you could help me with these questions: I would like to know what is the actual file size limit that can be used by z80 …

    ... out of the way my initial thoughts are:

    Z80 code. I don't ... based off the classic "Z80" core should be compatible ... with legacy Z80's. But, I don ... n-whistles along with a "Z80 type" core. I mean, ...
    cbmeeks cbmeeks October 2015 Hardware
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