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Push/Pop data copyingWe all know that stack pointer cheese and push/pop is faster to move data than LDIR - which in turn is slower than unrolled LDI's anyway. I rewrote …
... PUSH, you set the stack to the data POP a ... value off the stack, change the stack pointer to the ... is to point the stack pointer at the screen ... the screen from the bottom up and avoiding shearing).
... LD instructions. It also takes up more room, but it ... -
RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... /> inc hl ; move HL up one address
push hl ... /> inc hl ; move HL up one address
ld (hl ... /> inc hl ; move HL up one address
ld ( ... /> inc hl ; move HL up one address
ld (hl ... e, l ; without using the stack
add hl, hl ; ... -
Welcome back Spectaculator!Hmm, I have to evaluate this again. It's the first emu I've tried that actually seems to boots the PlusD. Is there any way of speeding up the disc …
... don't want it speeded up. :smile:
But I ... find simply by examining the stack in the debugger after a ... -
Fast LogsAnyone know of a fast ln function I can steal? The ROM function seems to be hideously slow. I wrote a look-up table dirty and less accurate sin func…
... to the required number and stack it.
For example ... , increase in speed and frees up some ROM space too.
up the algorithm very much. Not ... -
Large job lot of softwareMy parents have finally decided that they don't want to keep all of my Sinclair stuff in their loft and since I've not got a huge amount of space eit…
... tapes, though there's a stack of New Computer Expresses that ... Cheetah 125's have popped up. -
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…
... some code to shift the stack pointer mid-way along each ... time). But that would suck up all the memory as you ... -
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…
... earlier they have been set up with the appropriate registers - so ... that (remembering that since the stack is used it re-draws ... being pushed is all set up before hand. Also there is ... -
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 …
... up right?!?!?!!... :-?[/QUOTE]
It all depends on where the stack ... -
Pakacuda. anybody notice....... that it's not a 16K game? I was trying to load it on one of my 16K Speccies and it failed to load every time. Inlay says 16K. Cassette says 16K.…
The code block is overwriting the stack on the 16K, which doesn't happen on the 48K as it's much higher up. -
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 …
It's the stack pointer which is causing the ... two stacks, and eventually the stack pointer gets pushed down into ... compiler code itself is taking up space above 60000, is to ... -
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 …
... as to whether the machine stack temporarily gets big enough to ... characters, or tokens which mess up the screen a bit but ... -
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 …
... 's still not right. The stack is still creeping down with ... needs patching, but the stack's still filling up, so there's ... -
Locating the GOSUB stackI was wondering if someone could explain how to locate the dividing line between the GOSUB stack and the machine stack. Looking at the GOSUB routine …
... line between the GOSUB stack and the machine stack. Looking at the ... make entries on the GOSUB stack, but I can't see ... up.[/QUOTE]
SP points to the machine stack. The GOSUB stack ... add something to the GOSUB stack you have to adjust the ... -
Locating the GOSUB stackI was wondering if someone could explain how to locate the dividing line between the GOSUB stack and the machine stack. Looking at the GOSUB routine …
... line between the GOSUB stack and the machine stack. Looking at the ... make entries on the GOSUB stack, but I can't see ... up.[/QUOTE]
In BASIC every command will leave the stack ... used on the stack.
An empty stack will give a ... -
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 …
... of RET addresses building up in the stack from CALLs to routines ... programmer realised that the stack was filling up, as whenever the game ... /> [/code]
which resets the stack pointer to the bottom, so ... safe point to reset the stack pointer when a new screen ... -
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 ... and was resetting the machine stack pointer on the options screen ... help, but I still end up at least 10 seconds short ... -
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 …
I've just finished checking up to level 25 on a ... : a) The end-of-level stack-reset patch as posted above ... -
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,…
... specific moment and modifying the stack just as it's approaching ... ... for this theory to hold up, the ROM would have to ... -
Serial protocol, help!Hi, simply trying to find best way to transfer programs from PC to real ZX Spectrum for testing purposes. Under Windows I tried using Spxfr and it w…
... I simply have to give up and deactivate CTS until next ... increased. By storing SP, initializing stack to my jump table and ... -
Serial protocol, help!Hi, simply trying to find best way to transfer programs from PC to real ZX Spectrum for testing purposes. Under Windows I tried using Spxfr and it w…
... , try 10 times before giving up
in a,(c) ; read ...
ld sp,(stackp) ; restore stack
ret
... />
ld sp,(stackp) ; restore stack
ei
ret ... your help i would end up talking to pc @ 57600 bauds ... -
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 …
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 ... 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…
... /> inc hl ; move HL up one address
push hl ... /> inc hl ; move HL up one address
ld (hl ... /> inc hl ; move HL up one address
ld ( ... /> inc hl ; move HL up one address
ld (hl ... e, l ; without using the stack
add hl, hl ; ...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…
... the health starts going up and reaches full almost ... "Press E to pick up the shotgun" appears. Go ... than the carry-a-stack-of-weapons-and-a- ... predictable (See a boarded up entrance? Shoot the planks ... an armoured helicopter? Pick up the conveniently close to ...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…
... the health starts going up and reaches full almost ... "Press E to pick up the shotgun" appears. Go ... than the carry-a-stack-of-weapons-and-a- ... predictable (See a boarded up entrance? Shoot the planks ... an armoured helicopter? Pick up the conveniently close to ...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…
... the health starts going up and reaches full almost ... "Press E to pick up the shotgun" appears. Go ... than the carry-a-stack-of-weapons-and-a- ... predictable (See a boarded up entrance? Shoot the planks ... an armoured helicopter? Pick up the conveniently close to ...E3 2011 - New Games info and trailersHave just found loads of trailers for new games and thought I'd create a thread so we can all share info and funky (or not so) videos for all the new…
... 2, Metro 2033, and a stack of others.
I ... 'd have time to catch up with my games backlog. Maybe ...CrusoeI'm making slow progress in mapping & debugging this game, having to restart several times due to various unfortunate events. The latest was getting …
... significant error was the machine stack overflow, caused by indirect recursive ... load a saved game messed up the stack and the QQQ/TIUQ ... was due to the stack being messed up by other things).
