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<1…24252627282930…34>
  • Help needed with calculating screen addressesCan anyone help me finally crack Jonathan Cauldwell's screen addressing calculator and, more to the point, is the reason I'm struggling because this …

    ... RRA ; A = C DIV 8 = Pixel byte address offset
    LD ... ,A
    ADD HL,DE ; HL = screen pixel byte address
    Pixel offset
    RET

    dbolli dbolli June 2014 Development
  • Help needed with calculating screen addressesCan anyone help me finally crack Jonathan Cauldwell's screen addressing calculator and, more to the point, is the reason I'm struggling because this …

    ... $1F ; A = C DIV 8 = Pixel byte address offset
    LD ... L,A
    ADD HL,DE ; HL = screen pixel byte address
    Pixel offset
    RET
    .PIXELADDRESSTBL ...
    Einar Saukas Einar Saukas June 2014 Development
  • So shooting 360 degrees?...[I]How do I go about having - for example - a cannon in the middle of the screen, that can shoot in any direction towards the player?[/I] Well, I do…

    ... want to plot your pixel, you use the upper ... minute fraction less than one pixel each step. You could ... you add 1 to it (1/256th of a pixel movement ... again, 1/256th of a pixel movement) - the subtraction carries ... immediately moves a whole pixel. It just looks a ...
    joefish joefish June 2014 Development
  • Porting Blues Brothers CPC->ZX...just an ideaI've just watched a video of the CPC version of the Blues Brothers games by Titus [url]http://www.youtube.com/watch?v=6DOj-Ta3Ek4...Based[/url] on th…

    ... - bitmap[/QUOTE]
    [00..31] - Pixel data

    [QUOTE]4 ... ..35] - Attribute values for the pixel data

    [QUOTE]you ... . I'm hoping to possibly add things that the other platforms ...
    polomint polomint June 2014 New game ideas
  • Porting Blues Brothers CPC->ZX...just an ideaI've just watched a video of the CPC version of the Blues Brothers games by Titus [url]http://www.youtube.com/watch?v=6DOj-Ta3Ek4...Based[/url] on th…

    ... />
    I would like to add that, now that I've ... adventurous he could do a pixel scrolling version. If we assume ...
    Sokurah Sokurah June 2014 New game ideas
  • SpecBAS / SpecOS documentationHi, I just find out about SpecBAS and I was so impressed by the new functions while retaining compatibility with ZX Basic that I've been playing wit…

    ... 0,0

    now add an animation frame (I will ... add chr$ "A", it's ... location 400,400 in single pixel steps (slow)
    using ...

    2.is a pixel amount (an offset of the ... pixels in the same 8 pixel steps off the bottom ...
    ASH-II ASH-II June 2014 Sinclair Basic
  • What if Sinclair had released a 16 bit Spectrum?Had Sir Clive not wasted his companies money on the white elephant that was the C5 and instead focused on competing with his rival computer manufactu…

    ... /practically feasible, but assuming each pixel is represented by two bits ... would take 12288 bytes. Then add palettes for each bit pattern ...
    carlsson carlsson July 2014 Games
  • Change PAPER and BORDER colours from machine codeHow do you go about changing PAPER and BORDER colours from machine code? I've forgotten the system variables for border and paper.

    ... each of the next 7 rows is 32 bytes higher.
    rows. The sixteenth row is at ... , then again add 32 for each of the remaining seven rows.
    add on the X-coordinate. Then ... prefer to just use the ADD HL,HL trick 5 times ...
    joefish joefish July 2014 Development
  • Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…

    ... ULA+ and the every ink pixel different colour toggle in the ... the 2 screens (both every pixel different) and be able to ... emulate any AY hardware or add AY sound to 48k games ... along side script idea to add microspeech to games that didn ...
    Basher Basher August 2014 Hardware
  • What if Sinclair had released a 16 bit Spectrum?Had Sir Clive not wasted his companies money on the white elephant that was the C5 and instead focused on competing with his rival computer manufactu…

    ... could do 3 bits per pixel colour at 256x256 or above ... a lot of unfulfilled potential. Add to that the Enterprise too..
    Fizza Fizza August 2014 Games
  • What if Sinclair had released a 16 bit Spectrum?Had Sir Clive not wasted his companies money on the white elephant that was the C5 and instead focused on competing with his rival computer manufactu…

    ... a lot of unfulfilled potential. Add to that the Enterprise too ... more than 2 bits per pixel at the higher resolutions. Plus ... also manage 4 bits per pixel, but they too came rather ...
    Matt_B Matt_B August 2014 Games
  • ZX-Paintbrush 2.3 publishedDear readers, Today, I published version 2.3 of ZX-Paintbrush. Inspirated by kgmcneil, I decided to follow his ideas and implemented a switchable p…

    ... size for drawing across preset pixel distances, and you even have ... " & "P", but you could add a new button called "U ... again, it allows drawing using pixel data only without attributes, if ... the clipboard selection without the pixel data, and if he clicks ...
    kgmcneil kgmcneil August 2014 Emulators
  • A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…

    ... choose how many multicolor character rows you want. If you choose ... to remove a few bicolor rows
    from the bottom ... reducing 4
    rows (perhaps using these rows for a scoreboard with ... different color attribute every 2 pixel lines, and 8x1 means every ...
    Einar Saukas Einar Saukas August 2014 Brand new software
  • ZX-Paintbrush 2.3 publishedDear readers, Today, I published version 2.3 of ZX-Paintbrush. Inspirated by kgmcneil, I decided to follow his ideas and implemented a switchable p…

    ... size for drawing across preset pixel distances, and you even ... & "P", but you could add a new button called "U ... again, it allows drawing using pixel data only without attributes, if ... often occurring invertions on 8x8 pixel patterns....

    And ...
    clausjahn clausjahn August 2014 Emulators
  • ZX-Paintbrush 2.3 publishedDear readers, Today, I published version 2.3 of ZX-Paintbrush. Inspirated by kgmcneil, I decided to follow his ideas and implemented a switchable p…

    ... size for drawing across preset pixel distances, and you even have ... : You already have Character & Pixel Grids (C & P). I ... " & "P", but you could add a new button called "U ...
    clausjahn clausjahn August 2014 Emulators
  • GUI/OS for the Spectrum?Hi, Is anybody working on a WIMP/GUI system for the Spec? Is there anything current out there? [url]http://snakeoillabs.com/wordpress/2005/10/30/8…

    ... a standard pixel background. You can see the numbers add up quickly ... using functions that measure the pixel width of strings and that ... blocks that fit into some pixel width. In a windowing system ...
    Alcoholics Anonymous Alcoholics Anonymous August 2014 Development
  • Face-Off: ZX Spectrum vs. Commodore 64I found an old oldish, but very informed and interesting article on the ole Spectrum vs. Commodore 64 argument. The article explains the technical d…

    ... the two images on alternate pixel rows by carefully timed bank-swapping ...
    joefish joefish August 2014 Sinclair Miscellaneous
  • TattoosI have just returned from an excellent holiday in Corfu and whilst relaxing by the pool with a full belly in the 33 degree heat it occured to me how …

    ... star and she wants to add a bigger one (bigger tattoo ... hidden) Magic Knight (original 16x16 pixel version) I couldn't think ...
    David Jones David Jones August 2014 Chit chat
  • Better arrangement for video memory?While doing some documentation work for the ZX-Uno project, I compared the advantages of the weird layout of the ZX Spectrum against a linear layout.…

    ... a given coordinates of a pixel, not character. For character coordinates ... ,l
    add a,a
    add a,a
    add a,a ... , does calculate the pixel address for every pixel plotted in a DRAW ... have speeded both character and pixel routines, given the way they ...
    mcleod_ideafix mcleod_ideafix September 2014 Development
  • ZX-Paintbrush 2.3 publishedDear readers, Today, I published version 2.3 of ZX-Paintbrush. Inspirated by kgmcneil, I decided to follow his ideas and implemented a switchable p…

    ... : You already have Character & Pixel Grids (C & P). I ... " & "P", but you could add a new button called "U ... that can be mixed used. Pixel, Character and user-defined (the ...
    clausjahn clausjahn September 2014 Emulators
  • Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…

    ... a width of about 1 pixel, as it can be seen ... a frequency of half a pixel: 3.5MHz

    Third ... because the ULA begins reading pixel data about 6 t-states ... to accomplish this is to add inductors, capable of hundreds of ...
    mcleod_ideafix mcleod_ideafix September 2014 Hardware
  • Buffer to screen - how much?[FONT=Calibri][SIZE=3]I am starting to build a new game and am researching different ways to accomplish what I need to do. My question is, is it poss…

    ... doing something similar - eight rows of pixel scrolling. Just instead of ... a small number of 16x16 pixel-positioned sprites to keep ... fine for one pixel scrolling. For two pixel scrolling, you really ... did something similar for four-pixel scrolling on the ST ( ...
    joefish joefish September 2014 Development
  • Life of Pixel (lovely retro game) on sale soon for $2[url]http://www.lifeofpixel.co.uk/[/url] $2 from midnight Wednesday 17th September (not sure for how long). Well worth it.

    thanks mousey, it's live now for 6 days :)

    $2 or ?1.27 (or maybe more in scotland on friday ;) ) and it's via humble bundle so it'll add it to your account also if you login to that first prior to going to life of pixel.
    fog fog September 2014 Chit chat
  • ZX-Paintbrush 2.5 publishedDear readers, as there were many updates since the last version, I want to bring this to public, so that I hopefully can return back to ZX-Assembler…

    ... and 16x16 pixel steps respectively, so why not also add an extra ... those settings back to 1x1 pixel movement, and clicking on the ... are already starting to significantly add to the value of this ...
    kgmcneil kgmcneil September 2014 Emulators
  • ZX-Paintbrush 2.5 publishedDear readers, as there were many updates since the last version, I want to bring this to public, so that I hopefully can return back to ZX-Assembler…

    ... and 16x16 pixel steps respectively, so why not also add an extra ... those settings back to 1x1 pixel movement, and clicking on the ...
    clausjahn clausjahn September 2014 Emulators
  • Game of Life.Last year (I think) or maybe the year before, I entered a Game of Life simulator into the CSS CGC compo but for the Sinclair ZX81. I decided to port…

    ... pop bc
    add hl,bc ;HL=starting ... jp z,LoadP
    add a,10 ;" "+10="*"
    add hl,bc

    ld c,18 ;C= 18 rows ... add hl,de
    add hl,de
    add ...
    Battle Bunny Battle Bunny October 2014 Sinclair Basic
  • πBacteria, Bare Metal emulador for Raspberry PiSorry, Google traslated text below ---- What is an emulator Bare Metal? It is an emulator that runs directly on the machine, no operating system beh…

    ... guess if you want to add Sinclair joysticks you could just ... add them in parallel to the switches for the relevant keyboard rows ... . (Though maybe you could add one or two ...
    joefish joefish October 2014 Emulators
  • πBacteria, Bare Metal emulador for Raspberry PiSorry, Google traslated text below ---- What is an emulator Bare Metal? It is an emulator that runs directly on the machine, no operating system beh…

    ... guess if you want to add Sinclair joysticks you could just ... add them in parallel to the switches for the relevant keyboard rows ... ;798558] (Though maybe you could add one or two programmable IN ...
    antoniovillena antoniovillena October 2014 Emulators
  • clear a windowed area of the screenHi everyone! Ain't been on here for donkeys, but have recently started messing around with a little game. I'm looking for ideas/opinions on the bes…

    ... ;increment line D=010sslll
    add a,d ;avoid double increment ...
    dec (ix+1) ;decrement rows counter
    ret z
    ld a,e
    add a,32 ;increments 'rrr' where ...
    Battle Bunny Battle Bunny October 2014 Development
  • clear a windowed area of the screenHi everyone! Ain't been on here for donkeys, but have recently started messing around with a little game. I'm looking for ideas/opinions on the bes…

    ... a,192+24 ; 192 pixel lines + 24 attrib rows
    ld hl ... ,16384+LAST_COL ; first pixel line, last ... a,192+24 ; 192 pixel lines + 24 attrib rows
    ld bc ...
    Mr X Mr X October 2014 Development
<1…24252627282930…34>

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