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Static vs stacked local variables in z88dkHello everyone. I'm doing a program for Spectrum 48KB with z88dk v1.8 (XX Mar 2008), and I eventually discovered that if your local variables in fun…
... static rather than in stack, the code is considerably shorter and faster ... the variable 'i' to live in the stack (by removing the 'static' modifier), the code ... works well with optimizer on, but the resulting code ... -
Learning C for z88dkI've never gone much beyond basic, a little bit of z80 assembler, and some Delphi which I had lots of help with. I've forgotten 99% of what I learne…
... Even looking at the examples that come with ... with comments in the source that explain not ... what the job of each section of the code is, ... but what is going on in each keyword, the ... another version using more complicated code, perhaps using sp1.
Jet Set Willy - Commodore 64Can anyone help with a scan of the code card for the C64 version of JSW?
Can anyone help with a scan of the code card for the C64 version of JSW?Exolon starsHas anyone reverse engineered Exolon?. I am looking for the address or disassembly of the code that draws/updates the stars on the main menu screen.
Has anyone reverse engineered Exolon?. I am looking for the address or disassembly of the code that draws/updates the stars on the main menu screen.for (;;) { }What does that piece of code do in C? Well I am familiar with something like for (i=0; i<100; i++) { } but I haven't understood what happens if you l…
What does that piece of code do in C?
Well I am familiar with something like for (i=0; iOnly 300MB ?I was watching the TV program Caprica, and one of the characters says to another "[I]The human brain can only store around 300 megabytes of informati…
... seems woefully, exponentially short of the mark.
Now ... make the classic mistake where a programmer copies a block of code ... gets accidentally deleted and so the code is supposed lost for ever ... , as the writer of the story didn't understand ...pasmo and rept macrosHi, I'm delving back into speccy coding again (and trying to remember Z80 along the way) and I'm trying to figure out how to use a variable in a rep…
... trying to remember Z80 along the way) and I'm trying ... /> endm
(not exactly the code I'm working on, but ... a simplified example)
The documentation says it's possible ...In this months Edge...There's an interesting interview with Don Priestley (who's now nearly 70!) about the making of The Trapdoor. I found it quite amusing that he consid…
... now nearly 70!) about the making of The Trapdoor. I found it ... up with routines and pass the code onto some school kids (he ... former teacher) who would optimise the code for him!Tool Assisted Speedplay on ZX Spectrum?I wonder if anyone ever thought about adding [url=http://tasvideos.org/WelcomeToTASVideos.html]Tool Assisted Speedplay[/url] support in ZX Spectrum e…
... possible using all the possibilities of the emulators, like ... states, etc. which provides the player with incredible reaction, ... the game data and code remains completely unchanged (however, the code is ... to create TAS movies. The features are input recording ...Mr Do! ?Not exactly a new idea (at least twenty-seven years old now :-o), but how about a port of Mr Do! to the Spectrum? There was never an official one, ev…
... for the BBC, the Amstrad, the C64 and even the Tandy, and the ... not me) to disassemble the code to learn how everything works ... s interested, you can download the game code from:
... br /> If anyone has the time and the ability, then please consider ...Common pitfalls and solutionsLet's discuss some of the common problems in Speccy programming, and the methods we use to avoid them. For an example, here is a piece of code that …
... is a piece of code that solves the infamous USR0 problem. ... else wrote, inc. the code itself.)
[code]
;ANTI-USR0 ... random corruption.
;
;The next program addresses this so ...
RES 4,(IY+01)[/code]
Surely there ...Issue 65 of Scene+As I understand that some programmers wants to be informed if their programs were distributed on our disk magazine, here is a list what will be on ne…
... we were in contact with the original programmers, some we ... fine we distribute it as the software is freely downloadable. We ... make any profit from distributing the magazine, but we give ... do not change the code besides changing the loader for the disk-users. Our ...48K Speccy Repair Log.Some people may know my love for writing up my repairs of arcade PCBs on various forums so thought I would do the same for this little fella. Had th…
... the board is hogtied to the ROM and can only run the code in the ... ROM, the 9000 allows you to ... . The only difference between the Fluke running the board and the Z80 chip running the ...Bad loading screen for Phantis[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0003676[/url] [img]http://www.worldofspectrum.org/showscreen.cgi?screen=/screens/load/p/gif/Ph…
... [/img]
The code for second part on the screen was added ...Looking for cursor routineIt's been a long time since I programmed a little bit in Basic, so I decided to create a simple cursor routine: [url]http://db.tt/SPnSdpx[/url] I k…
... crap. :razz: But considering the above routine, can someone ... are pressed and store the key code somewhere so Basic ... POKE before launching the routine.
-The addresses where information ... everything would stay together. The code for the exit key would be ...Popeye, QBert, Locomotion and Gyruss PrototypesHello. OK, there are prototypes of Popeye, QBert, Locomotion and Gyruss out there which were released as Interface2 Cartridges only and not many of …
... since they use the first 16k for the code that means only 128k ... to play them. Here are the .TAP files :
[url ... ) - just replace the last block in the TAP file with the binary image ... of the cart and ...New Isometric Game MK2A while back (October 2009) I started writing a new isometric game. [url]http://www.worldofspectrum.org/forums/showthread.php?t=27123[/url] Well, I…
... 've improved some of the code speed and have started ... will be a demo, the "map engine" needs to ... written, as well as making the sprite engine wrapable.
... licence to steal some of the graphics too ;-)
the cable car bit....
...General purpose full screen input routineHi Folks, One of the things that annoyed me back in the 1980s with most BASICs was the lack of a full screen "formatted" input function. You could …
... still quite simple but provides the following features:
[/LIST]
The following source is quite heavily ... . Please note, the program is the XINPUT routine plus ... input.
[CODE]100 REM *---------------------*
110 REM ...Playing SID music on AY??Hello. Some time ago, with occasion of another thread, I was asking about possibility of making a very certain thing - a SID emulator for Spectrum …
... anything.
Here is the program itself: [url]http://drac030 ... thing I haven't before: THE SOURCE of XL/XE SID ... /> Is it possible to "translate" the code for Z80 with AY?
Any MCODE programmers fancy a challenge?Hi Folks, I have been using the Micro-Print utility in the archive and found it to be really good. It is the one that provides 32, 36, 42, 51, 64 a…
... up to the task. :(
1) Make the code relocatable - ... by so that the name of the attribute variable name ... below.
[CODE]100 REM --------------------------
110 REM ... 64564
410 REM --------------------------[/CODE]
I ...A cheat's way of viewing magazine scan archives as double-page scansI don't know why I didn't think of this sooner - previously I was viewing my locally-stored magazine page image scans a page at a time, sort of killi…
... , as well as ImageMagick. The script is geared towards *nix ... "crash98". Place this script in the parent directory to those directories ... />
You'll see in the code that it only takes notice ... in this way.
[CODE]
use strict;
Why doesn't my routine work?I have a "level" defined by 504 bytes (28 squares across x 18 squares down) I'm trying to write a routine that will take an X,Y coordinate in pixels…
... isn't quite working. Heres the code I've tried, please ... correct me! :)
[code]
compare_xy: nop ;
ld ... ;A should now contain the data byte read from the level.
[/code]Any good sound program for Spectrum?I need a recommendation. I don't mean an utility for creating music, but for creating digital sound samples. Is there any PC cross-development util…
... it into ZxSpectrum format providing the player code?
I'm ... sample but I also had the player code in .bin format (I ... .asm). It turned later that the code wassn't relocateble - very big ... a sound sample to your code written in cross assembler like ...A clever method of using a single 8-bit register to be used for two things at a timeI don't know if this is the way the SAVE routine in the Spectrum works. Anyway, this is what I've learned today. I've been commented the disassembly…
... to understand the logic behind the piece of code that outputs the required pulses ... outputted to MIC.
The code is more or less like ... this:
[code];L is the byte to be outputted ... CF is reset before the jump
JR SA_BIT[/code]Little problem with ladders in AGD 2.6Hello! I thought I'd while away a sleepless night playing with Jonathan Cauldwell's AGD. I've designed some blocks, a screen layout, and a sprite, …
... an error message. The code snippet is:
[CODE]...
IF ... I replace LADDERUP with CANGOUP the code works fine, though my ... point me in the right direction? The manual is sparse ... example game, and found the correct functions are actually ...Z88DK tapfile creation questionHere's another question. The game I've just started working on (Sid Spanners 3), I'm concatenating the following tap files together, to make a big ta…
... -app
[/code]
The resultant combined tapfile works ... without including the usual BASIC loader (just the CODE file)? Or ... Beepola has the option to just export the CODE file (music ... player & data) without the BASIC ...Converting TRD-Dos into TapHello, there are still many programs appearing on TRD-Dos or SCL format and users of normal Spectrum cannot run them. Of course I know about emulator…
... disks are first the boot-program followed by the game or ... which includes the Basic start and code in REM lines. The code might then ... load disk sectors, this is the ... disk using TRD2TAP , then the created TAP-File will not ...PS3 now fully cracked and open?About a month back, a hacking group claimed that they'd discovered the PS3's 'key' algorithms, meaning that they can 'sign' any code. What this means…
... on Microsoft could always update the code to check for originals, thereby ... possibility on the PS3. Since the PS3 can now run unsigned code, then ... />
The PS3 isn't the only machine to use the signed code method ...Tzer version 1 (I think)Hi all, I chucked together this Windows application (although it will work under Linux using Wine with the .Net Framework 2 installed) so that I cou…
... under Linux using Wine with the .Net Framework 2 installed) ... been concentrating on getting the back-end code working.
... double-click on the game.
Also, the only emulator it ... I get back to altering the code later)...
...Is converting Microdrive formats possible???Hi. First post. I'm a long-time Speccy owner, was lost, but found my way home! :D I have a Disciple as well... Now to my question, but first the …
... bizarrely, I archived all the files with the "CODE" format (file-type 4 ... this code. Unsurprisingly, the Laser Genius assembler rejects the CODE-format source-files. The AtariST ... . For instance, loading the CODE-files to the correct Assembler filespace & ...
