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  • Execution map file support in different emulatorsAs I'm now seeking about execution map files, the different emulators support, I want to start a new discussion here. Today, I tried to create a mem…

    ...
    bit 5: =1 means stack reading
    bit 6: =1 ... means stack writing
    bit 7: reserved
    clausjahn clausjahn July 2015 Emulators
  • The text edition window shrinksJust when I thought that all my problems here were solved , another bug has popped up : When I begin writing a message , no matter if a new discussi…

    ... still write the message and scroll through it with the cursor ...
    modern_hermit modern_hermit July 2015 WoS/Forum Issues
  • Subtract 4 from an addressThis is a novice Z80 question really: I'm trying to vertical scroll my back buffer, but I'm not sure of the quickest way to apply an offset and mo…

    ... /> I'm trying to vertical scroll my back buffer, but I ... area I need to vertical scroll is therefore 18 chars wide ...
    Atari_Jetman Atari_Jetman September 2015 Development
  • Advices for double buffering ?Hi, I'm currently coding graphics routines for a forthcoming game, I use a double buffer (the dummy screen is at $e000, the code at $8000) to pro…

    ... effects (sprites drawing) and the stack method to copy the dummy ... the real screen.
    The stack method if faster than any ...
    majikeyric majikeyric September 2015 Development
  • The Spectrum Show 44Episode 44 now live. This includes a review of the Stack Light Rifle. [url="https://youtu.be/oBtaqGaGrmU"]View here.[/url]

    Episode 44 now live. This includes a review of the Stack Light Rifle.
    [url="https://youtu.be/oBtaqGaGrmU"]View here.[/url]
    Paul-J Paul-J September 2015 Announcements
  • ZX Spectrum Sprite chipHi everyone. As I said some time ago, I wanted to make a 'virtual' Sprite chip for the ZX spectrum, on my ZEsarUX emulator. The idea is to make so…

    ... display.

    -you can scroll the main video memory on ...
    chernandezba chernandezba November 2015 Emulators
  • Contact Sam Cruise - BugWhile playing through 'Contact Sam Cruise' yesterday I happened upon a bug when I was arrested, when I moved inside the jail cell the screen scrolled…

    ... cell makes you disappear and scroll the screen right, that happened ...
    Ersh Ersh November 2015 Games
  • RARE TEXT ADVENTURES FOR SALEHello All Might have to scroll down the list....some nice and unusual text adventures (amongst other things - click on Buy it Now to see everythin…

    ...

    Might have to scroll down the list....some nice ...
    pigdog pigdog November 2015 Sales
  • WANTED Machinecode Routine for Paging in Betadisk TR-DOS v5 ROMI try to build a small MCode-program which writes the TR-DOS-ROM v4 / v5 to RAM adress 40000 an up. It´s working on TR-DOS v4 / Betadisk 48k: C…

    ... OFF return adress on the stack

    ;Now we can ...
    Luzie Luzie December 2015 Hardware
  • Image 2 spectrumHi. This is my take on the "converting rgb images to spectrum". (or well, second take, first was a photoshop filter..) [img]https://dl.dropboxu…

    ... is that you have a stack of modifiers you can apply ...
    Sol_HSA Sol_HSA December 2015 Announcements
  • Flood FillHi Folks, Can anyone point me to a flood fill that I can call from ZX BASIC? I have looked through the archive and although there are posts about…

    ... too big but probably not stack based due to lack of ...
    Paddy Coleman Paddy Coleman December 2015 Development
  • Hugh Walker - Adventure ProbeHi there. My father, Hugh Walker, suddenly died last Saturday. He had been a frequent contributor to the Spectrum community in the 1980s, includin…

    ... anyone happens to have a stack of the fanzines somewhere. Or ...
    botherer botherer January 2016 Chit chat
  • Text scroller and custom fontYesterday I was testing this text scroll routine taken from Jonathan Cauldwell's Intro Maker (labels have been inserted to allow partial code relocab…

    ... I was testing this text scroll routine taken from Jonathan Cauldwell ...
    Alessandro Grussu Alessandro Grussu January 2016 Development
  • Speccy Games that will be 25 in 2016!Yes, time for the annual list of games turning 25! A lot of Speccy owners would be upgrading to other systems around this time, if not before 1991, …

    ... Transylvania
    Spooky Castle
    Stack Up
    Star Control
    deadpan666 deadpan666 February 2016 Games
  • Help! I'm learning Machine Code...Having decided to take the plunge and learn to machine code a while ago, I have started in earnest using the much recommended 'Mastering Machine Code…

    ... you have understood using the stack and conditional instructions, write a ... fifty (decimal) on to the stack (using PUSH AF) and then ...
    namtip namtip February 2016 Development
  • Speccy vs PiI've been doing some side by side comparisons on emulation (rpi) vs actual speccy (48k+). And I'm really impressed with what Fuse can do when the pi …

    ... been looking at the text scroll when r-type finishes loading ... certainly noticeable on the text scroll. So I'm favoring the ...
    kilauea kilauea April 2016 Emulators
  • Let's copy buffers!Figured I'd do some double buffered graphics, so I can render for several frames before displaying stuff. Yes, I mean on a 48k speccy, so no 128k spe…

    ... -13/ and mess with the stack:

    [code]
    ld ... , I'd probably use the stack version, but for multi-frame ...
    Sol_HSA Sol_HSA April 2016 Development
  • P.O.W.As far as I know, a port of P.O.W. (Prisoners of War) from NHK, doesn't exist. [img]https://cld.pt/dl/download/61d19b5e-453b-489c-b17b-d3ed6fccd594/…

    ... , is to have char wide scroll on level, so that we ...
    RMartins RMartins June 2016 Development
  • Z88DK NOOB cplot INK colorHi I am a complete NOOB with Z88DK, I am trying to draw colored circles. How does ink, paper and border work with Z88DK. I started trying to wo…

    ... = y, and remove y from stack (necessary for CALLEE functions)
    stack (necessary for CALLEE functions)
    stack

    LD D,C ...
    andydansby andydansby June 2016 Development
  • CONTINUE weirdnessJust watched this http://gizmodo.com/we-only-just-cracked-a-33-year-old-zx-spectrum-challeng-1701174225 and it got me thinking about the other cha…

    ... every line until you get scroll? message
    2nd, 3rd, 4th ...
    SnazzyParrot SnazzyParrot June 2016 Sinclair Basic
  • "Limbo" free on steam 21 / 22 June http://www.pcgamer.com/the-creepy-platformer-limbo-is-free-for-a-day-on-steam/ just logged into steam, saw it come up when you go store.. and yo…

    http://www.pcgamer.com/the-creepy-platformer-limbo-is-free-for-a-day-on-steam/

    just logged into steam, saw it come up when you go store.. and you'll scroll down to see "install game" and it'll register it to ya account once thats done
    fog fog June 2016 Chit chat
  • So it occurred to me; "Why bother with going into 48K BASIC when you can just....wrap the machine code calls inside a 'RST #28;DEFW addr:RET'?" Of course, you DO need a small M/C routine to do that, and ta-daaa, here it is: [cod…

    ... ; unstack BC from the calculator stack - all will become clear in ... /C routine on the calculator stack before calling my 'interface routine ...
    The_Bert The_Bert September 2016 Sinclair Basic
  • sdcc inline assembly wtf..So, I'm trying to get division to work. By googling I've found one division algorithm that's quoted in several places, but can't seem to get it to wo…

    ... this particular calling mode, the stack first contains the return address ...
    Sol_HSA Sol_HSA September 2016 Development
  • Emulator ExperiencesMy workflow is to compile on command line and then launch an emulator to load the .TAP file. In this experiment I'll try to use memory map viewer to …

    ... to figure out how much stack is used.

    Spud ... 'd like to look at stack memory while it's running ...
    Sol_HSA Sol_HSA October 2016 Emulators
  • The state of source level debuggingI was just wondering if we can put on a table everything we collectively know about source level debugging for ZX Spectrum to get an overview of curr…

    ... compilers, and can’t interpret stack frames. The effort to add ...
    tstih tstih October 2016 Development
  • MuCho CYOA/gamebook/multiple choise adventure engine, release 3 - little to no programming neededDownload the whole kit (win32 binaries) here: http://iki.fi/sol/zip/mucho_03.zip Or if you just want to peek at the documentation and prebuilt …

    ... much) and has a proportional "scroll bar" showing how many options ...
    Sol_HSA Sol_HSA November 2016 Development
  • How would you approach parallax?So ... there is this trick by Joffa that we all know...of waiting for the ULA to reach certain pattern on the screen using the IN command. And then s…

    ... decided that you will horizontally scroll top two thirds of the ... .) -- what would the smooth ongoing scroll step be? 2? 4? 8 ... a bit more nasty to scroll (3 shifts per byte); but ... have 512 tiles. If you scroll 8 pixels left then you ...
    tstih tstih November 2016 Development
  • New Game: Crappy CratesHeres something I knocked up for the festive period, a bit of a Sokoban type affair where you have to stack crates in the designated area whilst avoi…

    ... affair where you have to stack crates in the designated area ...
    daveysludge daveysludge December 2016 Brand new software
  • ROM PRINT routine issuesHi all, I am using the ROM print routines a lot in my assembly program and I'm experiencing issues. I am changing the system variable DF CC to po…

    ... then it will assume a scroll of one character has to ...
    Kevin_C Kevin_C December 2016 Development
  • Random Numbers, USR Return Values & Timing BASICI've been trying out Jon Ritman's random number routine, published in Your Sinclair Aug'87. Apart from a timing comparison I also did a frequency ana…

    ... ,(SEED)
    call $2d2b ;STACK_BC stack the number in BC
    stack (apart from the change to ...
    Battle Bunny Battle Bunny January 2017 Sinclair Basic
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