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  • New game: ZoomBloxHi everyone, this is my first post here, so first off I'd like to say hello to the Spectrum development community :) I've been developing on an…

    ... its stuff during the actual screen drawing and leaves (most of?) the ...
    Fabrizio Zavagli Fabrizio Zavagli August 2016 Development
  • New game: ZoomBloxHi everyone, this is my first post here, so first off I'd like to say hello to the Spectrum development community :) I've been developing on an…

    ... I have to redraw the whole screen... hence the flickering! The alternative ... of cycles to update the screen, so there are less cycles ...
    Timmy Timmy August 2016 Development
  • New game: ZoomBloxHi everyone, this is my first post here, so first off I'd like to say hello to the Spectrum development community :) I've been developing on an…

    ... I have to redraw the whole screen... hence the flickering! The alternative ...
    Einar Saukas Einar Saukas August 2016 Development
  • Must be missing the point - machine code... Hi Folks, Trying my hand at machine code again but falling at the first hurdle. I hand crafted the following to run at address 62000 and the co…

    ... 4000 ; Load HL with screen address $21 $00 $ ... POKE bit pattern in to screen memory $77
    62009 ... INC L ; Next screen byte (256 iterations) $2C< ... H ; Next row of screen bytes $24
    62013 ... 2 Frames to hash the whole screen!

    Only ...
    Paddy Coleman Paddy Coleman September 2016 Development
  • Where does the BASIC program sit 48K Spectrum memory?Hi there First post so be gentle, I've had a spectrum since the 80's and have recently started programming it for fun again. I wrote the followin…

    ... very slow and clears the whole screen. I was thinking of adding ... then copying that to the screen to speed it up ?
    ivanb303 ivanb303 September 2016 Sinclair Basic
  • Proportional fontsI've been doing some proportional font drawing, purely on C level at the moment, but it's orders of magnitude slower than I'd want it to be. It's sti…

    ... printing "Hello" takes about the whole frame. That's why I ... 't expect to draw the whole screen full of text at 50hz ...
    Sol_HSA Sol_HSA October 2016 Development
  • Proportional fontsI've been doing some proportional font drawing, purely on C level at the moment, but it's orders of magnitude slower than I'd want it to be. It's sti…

    ... printing "Hello" takes about the whole frame. That's why I ... 't expect to draw the whole screen full of text at 50hz ...
    Hikaru Hikaru October 2016 Development
  • Akalabeth gamei found now that someone ported an ansi-basic game (coded in 1979?) to msx-basic - what about a zx-spectrum basic version of it? ;) https://plus.goo…

    ... , your idea of zapping the whole screen with CLS and then restoring ... (but as most of the screen is black anyway, it might ... how to avoid wasting a whole byte for the sign bit ...
    Battle Bunny Battle Bunny October 2016 Sinclair Basic
  • I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…

    ... reason (at one point the whole screen became filled with bright light ... nuke), crashing to the home screen (only happened once, but still ...
    GreenCard GreenCard October 2016 Chit chat
  • I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…

    ... reason (at one point the whole screen became filled with bright light ... nuke), crashing to the home screen (only happened once, but still ...
    zx1 zx1 October 2016 Chit chat
  • I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…

    ... reason (at one point the whole screen became filled with bright light ... nuke), crashing to the home screen (only happened once, but still ...
    GreenCard GreenCard October 2016 Chit chat
  • how to fix instructions on screenI have a problem with my sequencer. I want the top half of the screen to stay fixed but allow the note values to print without pushing the instructio…

    ... for scrolling less than the whole screen.
    Way back in the ... games so that the split screen pictures didn't scroll off ... the screen with the text. I'm ...
    Pobbit Pobbit November 2016 Sinclair Basic
  • Please recommend me a drawing toolMerry Christmas! :) What tool would you recommend for me to draw Spectrum graphics? I´m not looking for Photoshop and similar, but a tool made f…

    ... change background colour of the whole screen at once? I have tried ... to change background colour of whole screen. Works well, though.
    Spectrum48K Spectrum48K January 2017 Sinclair Miscellaneous
  • Screen resolutions and the Speccy's limits?What list of screen resolutions/palettes could the ZX Spectrum feasibly produce on a standard PAL TV if RAM, ULA or other space constraints is not a …

    ... two are fixed for the whole screen and two are selectable per ... rather have a 16-colour screen at that resolution. 2-bits ...
    joefish joefish January 2017 Hardware
  • ****ing Awesome Spectrum Engine (FASE)This is a new engine (sprites, tiles, map) for all ZX Spectrum machines. The engine set ups a runtime enviroment that leave between 24K and 30K byt…

    ...
    Yes. Also repaints the screen.

    [quote="Alcoholics ... area occupied by the screen tiles. Is that automatically ... user enter into a new screen (changing $5c00). Without ... choose a rectangle with the whole screen, but this will take ...
    antoniovillena antoniovillena February 2017 Brand new software
  • c compiler benchmarkingI am going to have access to a number of commercial z80 compilers for a time for benchmarking, namely Hitech C v750 MSDOS (abandoned when Hitech was …

    ... most valuable optimisations. Sprite manipulation, screen buffers, collision detection? I' ...
    [quote]
    Sprite manipulation, screen buffers, collision detection?
    [/quote ... the engines do all the screen drawing and buffering.

    ...
    Alcoholics Anonymous Alcoholics Anonymous March 2017 Sinclair Miscellaneous
  • User-friendly UDG banks/sheetsHello, retro-colleagues) Sometimes I still play Speccyal games and try funny things in BASIC, but one thing keeps me slow: [b]sprites[/b]. Alright…

    ... waste memory by copying the whole screen, when only sections of it ...
    textvoyage textvoyage March 2017 Sinclair Basic
  • 2 scrolling linesHow would you draw, delete and scroll a 2 line landscape? [img]http://i1142.photobucket.com/albums/n608/daveyboyhughes/scramblines_zpsw0r2joew.png…

    For Penetrator you don't need to scroll the whole screen just the area where there is lines. I know this sounds obvious. If you treat it as a character array then you can treat the lines as spans ( RLE ) and only scroll the areas you need.
    seedy1812 seedy1812 May 2017 Development
  • 128k memory musingI've been pondering on the 128k memory thing a bit, and it's just bloody stupid. The 64k memory space is divided in four chunks. One is always los…

    ... 7. When you do the screen drawing you page in bank 7 ... the high byte of the screen address.
    dave18 dave18 May 2017 Development
  • ZX Spectrum Next Kickstarter Launchedhttps://www.kickstarter.com/projects/1835143999/zx-spectrum-next

    ... fast enough to blit several whole screen areas per frame. You don ...
    Lethargeek Lethargeek May 2017 Sinclair Miscellaneous
  • ZX Spectrum Next Kickstarter Launchedhttps://www.kickstarter.com/projects/1835143999/zx-spectrum-next

    ... fast enough to blit several whole screen areas per frame. You don ...
    Alcoholics Anonymous Alcoholics Anonymous May 2017 Sinclair Miscellaneous
  • ZX Spectrum Next Kickstarter Launchedhttps://www.kickstarter.com/projects/1835143999/zx-spectrum-next

    ... per frame to fill the whole screen area more than once anyway ...
    Lethargeek Lethargeek May 2017 Sinclair Miscellaneous
  • ZX-Paintbrush and global palette and ula+ supportHello, I think I need some help for the palette issue of ZX-Paintbrush. I want to check whether the way I'm about to clear the palette handling i…

    ... could then select the entire screen, do [b]Invert Pixels[/b ... can only work for the whole screen, not for selections, as the ...
    clausjahn clausjahn May 2017 Software
  • ZX-Paintbrush and global palette and ula+ supportHello, I think I need some help for the palette issue of ZX-Paintbrush. I want to check whether the way I'm about to clear the palette handling i…

    ... could then select the entire screen, do [b]Invert Pixels[/b ... can only work for the whole screen, not for selections, as the ...
    clausjahn clausjahn May 2017 Software
  • im looking for a horizontal scroll routinehi, im looking for a horizontal scroll routine. i read somewhere that you can do it with at 'to' statement, somewhere in a print routine. althoug…

    also i would like to know how to scroll a whole screen, aswell, not just one line
    digital digital June 2017 Sinclair Basic
  • Thinking about my gameAnother long post, I'm afraid. Somewhere on this Forum is a short chunk of text I put up as a sample of what I'd like to turn into a text adventu…

    ... don't take up the whole screen compress a LOT. Even a ... and compression of this entire screen gets it down to 809 ... converted to a spectrum .SCR screen[/url] (6912 bytes).

    screen compressed[/url] using [url="https ...
    colonel32 colonel32 July 2017 Chit chat
  • Space Invaders vs Pac-Man - Which Made The Biggest Impact?Hi everyone and welcome to the August 2017 edition of Which Is Best? Last month I placed two classic ZX Spectrum games head to head, Atic Atac and J…

    ... it's side
    the whole screen is refreshed (no spites) and ...
    ASH-II ASH-II August 2017 Games
  • Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…

    Writing screen drawing routines is probably the best way to learn as it will show instant results with a cheer when it works......and pretty patterns, a lock up or a reset when it goes horribly wrong.
    MatGubbins MatGubbins August 2017 Development
  • Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…

    ... />
    Takes 42512 Ts (covring whole screen) and uses 73 bytes at ...
    Paddy Coleman Paddy Coleman September 2017 Development
  • Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…

    ... /> [code]100 REM Setup Test Screen
    110 GO SUB 310 ... 37187 Ts to paint the whole screen.

    Many thanks
    Paddy Coleman Paddy Coleman September 2017 Development
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Latest Posts

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    Maroc's Other Projection on 9:55PM
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  • Happy 40th Birthday to the Amstrad CPC464!
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  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • New video about S-video modification on Issue two 48K Spectrum.
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