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Assembly Programming for IDIOTSOk are there any websites guides for what opcodes do in a z80 or books... but for really really thick people like me :-) Something along the lines …
... +Spracklen$[/url]
This book was recommended in Sinclair ... an 'Interrupt'. This 'Interrupt' is known as a 'Maskable Interrupt' ... delayed but normally happens at a fixed rate of 50hz (50 ... begining of a program's main loop to synchronize it with the ... -
Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... following:
Calls a specific routine using the control field to ... over the size of your fixed point maths. I personally prefer ... volocity and flags. This step would be repeated with a slight delay to ... -
Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... memory and inability to deal with several sets of 16 ... floating point audio pitch scaling routine based on Hermite polynomials:< ... only a small area has changed...?
As this ... /> .loop: ldh a,[dh]
srl a
ldh [dh],a
ldh a,[dl ... -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... easy when only 1 loop with 1 fixed register, but we can ... pressed
xor a
ld (hl),a ; reset last ... (hl) ; test on change (this happens during intrupt)
jr ... talking Dr. Beep - this is a very useful idea. Often ... -
Hacking the O.C.P Full Screen Editor/AssemblerIf you have been reading my posts recently then you will know that I am eager to have the sourcecode I wrote for the Spectrum during the period 1988 …
... process and preparing examples for this forum.
I ... fields each starting with a one BYTE character count. A blank line would ... into the routine as the O.C.P assembler has fixed columns ... I hope you have enjoyed this simple insight into hacking ... -
later today......[IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs909.snc4/72268_172079126142549_100000213882336_641184_4866225_n.jpg[/IMG] [IMG]http://sphotos.ak.f…
... should now be fixed , he says with fingers crossed and ... chance for faster screen redrawing routine? I also believe that ... rebirthing also should be fixed now a random number was getting ... with a few extra halts :) , although not as fast as possible , this ... -
Transferring games into MicrodriveLast week a big pack of empty microdrive cartridges arrived, and now I'm ready to playing with my little microdrive equipped speccy. One of my aim w…
...
I thought about this snapshot issue while falling asleep ... with a theory of mine that places Z80 depack code into a fixed ... area of repeated data. A clever routine placed in ... be an awesome achievement! This is oldskool game hacking/ ... -
Oscilloscope Speccy ProgramHi all, I remember very well in the old days when my Speccy was my single computer (around 1992) that I have had an oscilloscope software. This uses…
... ' is used when dealing with the amplitude of audio signals ...
What has all this got to do with oscilloscopes?
This area of computing can be ... negative phases over a fixed time frame. The routine is not 'time ... -
48k Out of memoryIv just had a 48k Speccy arrive today. The keyboard wasnt working right so I changed that. Now when I tried to load Cyclone it started to load ok fo…
... the eight RAM chips require replacing so if you can work ... don't you save yourself a lot of work.
As a guess try typing:
POKE ... try this with other addresses between 32768 and 65535. Maybe in a FOR loop. -
Oscilloscope Speccy ProgramHi all, I remember very well in the old days when my Speccy was my single computer (around 1992) that I have had an oscilloscope software. This uses…
... ) processing. This *may* have something to do with the described odd ... scanning routine is summoned automatically.
I'd try this:< ... disabling IRQs while in a timing loop is essential in order ... to have a more constant loop time.
Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…
... you nothing if the detection loop itself is 'slow'.
[*] You ... using a JP or JR [I]in both cases[/I], so this ... better to minimize the waiting loop, so you'll have shortest ... HL,buf ; also overwrite trigger routine with sample data - why not?
Why doesn't my loop work?Can anyone help me understand why my loop doesn't work? Is it to do with how DEC HL affects the flags? [code] ; Read 32k bytes from port 191 as fa…
... HL,buf ; also overwrite trigger routine with sample data - why not?< ... JP P,trig ; wait while this bit keeps reading zero (=positive ... to figure out if this can still be done ... to include a DI somewhere before entering the trigger loop (and ...Z88DK/SP1 library u_malloc() questionHi All, It may possibly be more appropriate for me to post this on the Z88DK forum, but I know quite a few WoSSers have used Z88DK, so here goes:- …
... is fixed and calculated at runtime (this corresponds ... will call your function with a 'struct sp1_update *' from ... with new graphics for letter A.
To create this list, a ... direct way (outside the game loop ...Supertest 128 - Loader QuestionI wonder if someone could explain (in simple terms please) :) , the purpose of the switch code. I see what is doing (going to 48k mode via spectrum)…
... manipulates the 128 SWAP routine ($5B00) so it ... replacing line 6 with POKE 23611,128 and then skipping the SWITCH routine. This ... worked for me on both a 128 and +3 Spectrum. What this ... (The SPECTRUM command also does this)
However ...yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…
... and won't play well with a multitasked operating system. As winston ... to do this but so does an interrupt service routine. They should ... -bits at a time and then tries to reduce loop iterations by ... be able to compile OS with this C compiler and bootstrap C ...Picture interference on red areas.I recently got a 48K Speccy off eBay, did a composite mode and it seemed to work OK, but then my TV had to go off for repair so I didn't use it for a…
[QUOTE=spodula;511276]I know this is probably a silly question, but i ... fixed now anyway, by replacing the C44 capacitor (with possibly a little help from a ...Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…
... need extra logic for this. You don't even ... in the each gfx routine he writes; and it ... next / previous, inside a character cell: a 8-bit INC / ... draw characters in a bit-mapped display with no hardware ... size you're stuck with three fixed-size blocks. Even the ...Calculating the address of a pixel?Hi Folks, Is there an easy/quick way of calculating the memory address of a pixel? So for example, if I wanted to "plot" pixel at screen coordinate…
... /> There are many ways around this, Lookup tables were quite popular ... (192 bytes), or write a small routine years ago to bit-mangle ... ANY size you're stuck with three fixed-size blocks. Even the ...Official CSSCGC 2011 Competition ThreadHello fellas. The site is up and running. We are already accepting submissions. [url]http://www.mojontwins.com/csscgc2011/[/url] Rules, info, and e…
... addiction to this feature, we use a totally revolucionary multicolor routine. The combination ... of both techniques results in a ... 's just a matter of replacing the Spectrum ULA with a modified ULA that ...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…
... nature of a FOR - POKE - NEXT loop for copying a large ... could copy the display file with a LET.
... call the keyboard input routine instead of the shadow ... I'd often used this in the past to ... that instead of working with the DEFADD space assigned ...Maketzx...Whats the state of play?Been out of the whole emulation bit for...a while :) But, back in the saddle, ready to transfer some more tapes.....except...maketzx doesnt seem to w…
... as I put it, was this (and please, follow slowly ... I repaired by replacing the "random tones" with those from ... ago. Note that this was not a case of fake ... to load without them. This cause much head-scratching ... the bug might have been fixed - but how would we ...Maketzx...Whats the state of play?Been out of the whole emulation bit for...a while :) But, back in the saddle, ready to transfer some more tapes.....except...maketzx doesnt seem to w…
... as I put it, was this (and please, follow slowly ... I repaired by replacing the "random tones" with those from another ... ago. Note that this was not a case of fake ... to load without them. This cause much head-scratching ... 6 did. I've fixed quite a lot of these and ...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…
It is a common practice, to unroll speed- ... needed, just a small routine that builds unrolled loop.
A lot of ... could be needed for a 48K game with a lot of graphics etc ... =SinclairUser/Issue068/Pages/SinclairUser06800061.jpg]this[/url].Help with custom loader neededAs people here became active recently about MakeTzx and tzx format in general, I have thought that I would post it here. I have some .wav recordings…
... of the times the saving routine explicitly generates such additional pulse ... cut them out. However replacing the noise with the pause equal to ... the pilot tones worked out with this loader? A global repeat count on ...Random numbers...Hi Folks, I am not an expert when it comes to random numbers. If I have the RANDOMIZE statement the beginning of a program and then proceed to gene…
... a value of 1 in variable A i.e. I have a wee loop ... sequence of numbers generated. In this case if it is at ... .
In the above, with the RANDOMIZE at the beginning ... random numbers because of the fixed amount of time an emulator ...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,…
... will edit my original post with the fixed code.[/QUOTE]
this new label for the ld ... printed using the common
routine (you're printing IR, so ... +1
Anyway, this is a very impressive tool to find ...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 am finishing off a guide on decompiling :smile:
a few more bugs in this program :sad:
I fixed ... 've died then it does a GOTO 1530, which does:
CrusoeI'm making slow progress in mapping & debugging this game, having to restart several times due to various unfortunate events. The latest was getting …
... well post it now with a warning. The first two ... happen, as the loop is entered with B=1 so ... the bugs I think this game will deserve ... br /> Any luck dealing with the spiders, or decoding the ... address if JP from sub-routine
JP PATCH ; ...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…
... TURBO is morern compatible interface with next features:
... detect master mouse ~~~~~
;this routine enable interrupt
;and use ... ld b,$FF
;A=y-axis port
in ... mouse ports in long loop during one/two interrupts. ...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…
... we go then. I started with a copy of your rzx and ... routine at $9eba. This sets up a 168 byte table and fills it with ... /> In the same routine, two places are filled with code $fc. Not ... ]
I've also fixed another couple of trivial bugs ...
