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Copying a SCREEN$ in ZX BASIC in 1 second?!Following on from the revived "[thread=20207]Saving a complete SCREEN$ in BASIC[/thread]" thread (although Arjun really only needed a suitable POKE i…
... middle 1/3rd of the screen into s$.
However ... which will call Slicing from Stack Variable.
However, if ... in the DEFADD area then Stack Variable is not called, because ... flagged as "not required" by Stack Function Argument, so Slicing is ... -
50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... to be PUSHed to the screen.[/QUOTE]
That's ... code for every word of screen data, which can't ... all that quick. The actual screen update would be fast, ... some code to shift the stack pointer mid-way along ... you only re-write the screen edges each time). But ... -
50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... that (remembering that since the stack is used it re-draws ... to the left of the screen). So what registers are being ... just one tile on the screen at that time its as ... -
50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... br /> ; HL now holds screen$ address
byte_A1D8:
; we are using the stack for screen writes
loc_A1E5:
;; sample screen pusher
;; fill 28 bytes ... of screen
push_8B00:
DUP ... -
Zynaps: is it handcoded?sorry if this question was already answered. but i did some inspection of Zynaps code and it seems to me that it's screen drawing (and maybe other pa…
... as speed-critical as a screen drawing routine was done through ... see heavy use of the stack and index registers. -
Time difference for jumps and calls?Just interested (and possibly trying to distract myself from the more pressing problems in my sprite routine) and willing to risk a potentially daft …
... all depends on where the stack points to. The full example ... table interleaves the locations in screen where the star dots shall ... . So the code fetches the screen address, checks if it is ... -
Best way to organise a multi screen game?Hi All, Does anybody know ay good ways to organise large multi screen game? Or any links to useful texts on the matter? In my previous single scr…
... a "based on screen x" parameter in your screen data.
screen.
Ideally, you make ... the ptr to the screen that a screen is based on, first ... you keep track (maintain a stack) of where you are in ... -
enJine: a fast tilemap enginetile engine based on excellent work by Joffa Smifff. here you can download first tech demo. [url=http://ketmar.no-ip.org/tmp/enJine.tap]Get It Now![…
... before crt ray reaches the screen (while it draws nothing or ... draw map (ray draws the screen faster then we blitting map ... for map blitting due to stack usage, and there is no ... -
Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…
... a socket [I]and[/I] stack the SRAM on top of ... trying to find any 7" screen and total measures is more ... -
Frank N SteinThis one > [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0001849[/url] Always seems to crash about level 7 (maybe a bit more) or so with an …
... machine stack temporarily gets big enough to interfere with the screen data ... cause a crash, as the screen data may be overwritten with ... tokens which mess up the screen a bit but don't ... -
Frank N SteinThis one > [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0001849[/url] Always seems to crash about level 7 (maybe a bit more) or so with an …
... . The programmer realised that the stack was filling up, as whenever ... goes back to the options screen after running out of lives ... /> [/code]
which resets the stack pointer to the bottom, so ... to reset the stack pointer when a new screen is started, making ... -
Frank N SteinThis one > [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0001849[/url] Always seems to crash about level 7 (maybe a bit more) or so with an …
... its own. It resets the stack pointer at the end of ... you got stuck on one screen for ages losing loads of ... RET addresses accumulating on the stack - but it would take a ... -
Games featuring... relevant bugsThere was a recent improvement to the WoS database in order to classify [URL="http://www.worldofspectrum.org/forums/showthread.php?t=34261"]Games fea…
... to accumulate on the machine stack and eventually an overflow into ... resetting the machine stack pointer on the options screen, but this wasn ... -
Frank N SteinThis one > [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0001849[/url] Always seems to crash about level 7 (maybe a bit more) or so with an …
... complexities and just resetting the stack pointer every level (prompted by ... that anyway on the options screen).
The "Invalid colour ... -
Frank N SteinThis one > [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0001849[/url] Always seems to crash about level 7 (maybe a bit more) or so with an …
... complexities and just resetting the stack pointer every level (prompted by ... that anyway on the options screen).[/QUOTE]
You might ... bug out:
The stack was still growing after I ... -
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…
... e, l ; without using the stack
add hl, hl ; ... /> ; WRITE A CHARACTER TO THE SCREEN
; There are four separate ... /> inc d ; point to next screen location
inc hl ; point ... /> inc d ; point to next screen location
inc hl ; point ... -
RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…
... which has to do with screen addressing) lead me to consider ... " has been pushed onto the stack...
[img]http://www ... at the top of the stack was 4444h. [B]The PUSH ... -
The Duke Nukem Forever demo is due out, BUT...The playable demo of Duke Nukem Forever is (finally!) going to be released, on the 3rd of June, one week before the full game is released (on the 10t…
... you died (nothing, just the screen goes all cracked). There's ... realistic than the carry-a-stack-of-weapons-and-a-ton ... -
The Duke Nukem Forever demo is due out, BUT...The playable demo of Duke Nukem Forever is (finally!) going to be released, on the 3rd of June, one week before the full game is released (on the 10t…
... you died (nothing, just the screen goes all cracked). There's ... realistic than the carry-a-stack-of-weapons-and-a-ton ... -
The Duke Nukem Forever demo is due out, BUT...The playable demo of Duke Nukem Forever is (finally!) going to be released, on the 3rd of June, one week before the full game is released (on the 10t…
... you died (nothing, just the screen goes all cracked). There's ... realistic than the carry-a-stack-of-weapons-and-a-ton ... -
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…
... at memory bufferes for the screen, why not consider just memory ... it adds this to the stack of windows, so when drawing ... you work in an reverse stack order. that way you only ... -
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…
... nearly a full screen and the have a stack bar in the ... remainder ( bottom?) of the screen where ... -
Last Sunset for LatticaHere's a [b]rough first draft[/b] of the [url=http://www.users.globalnet.co.uk/~jg27paw4/pourri/lattica.gif]Lattica map[/url], just to demonstrate th…
... always bounces back into the screen it just came from, at ... />
There's a major stack creep problem with the original ... of level 3 the machine stack was 3,232 bytes! There ... -
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... I see now is black screen and cursor. Right now, for ... is any mention of the screen layout in the latter at ... the PC register onto the stack and continue executing code from ... to push PC onto the stack, and take the most significant ... -
Fuse: what do you want to see?An open brainstorm. If you had a team of programmers working on [url=http://fuse-emulator.sf.net/]Fuse[/url], what would you tell them to work on? …
... The breakpoint list, event list, stack view, registers and disassembly should ... said before, visibility of screen writes as they are done ... half brightness and the current screen is refreshed at full brightness ... at the code for the screen emulation though so I ... -
Operator ANDHi I'm trying to write some very simple game in ZX Basic, but I guess I've forgot most of it because I can't understand why simple IF....THEN sequen…
... SCREEN$ command that erroneously stores the result twice on the calculator stack ... -
Bride of Frankenstein TAP has been hackedThe Bride of Frankenstein TAP on WoS doesn't have any spooks in it, so you're just wandering around an empty maze. This is because there's a RET at $…
... lightning effect in the intro screen. You can just ignore it ... near $b5a8 contain the call stack so they can also be ... -
Games featuring... relevant bugsThere was a recent improvement to the WoS database in order to classify [URL="http://www.worldofspectrum.org/forums/showthread.php?t=34261"]Games fea…
... uses the stack pointer to look up tables of screen data & ...
