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Urgent Help needed to fix this: calling all machine code gurusI am currently trying to write tutorials on the amazing Orfeus music composer by Proxima which allows you to do multi channel music through the beepe…
... with a player. The code is exported to address 35000 ... /> I have disassembled the code, and got it to re ... .
The code is here: [URL="http://www ... I have split the code into 2 posts as ... most appreciated:
[code]
; Disassembly of the ... -
Running code from the display memory?Is it possible to run machine code from the memory area used by the display file? If you were really out of memory and some part of screen is not u…
Is it possible to run machine code from the memory area used ... to black/black, load some code in the display area and ... -
How can I view code from a game?Hi All, I had a Spectrum years ago and it is what started my love for playing games. I have recently been playing some of the old games I used to pl…
... how they structure the code and how they did ... interested in copying the code straight from the original ... there anyway of extracting the code from the .tzx or ... game into and lists the code?
With ... I don't understand machine code, I think that Striker ... -
Spectrum Machine Language For The Absolute BeginnerNot quite sure if this should be in here but here goes. Having never delved into machine code before I thought id have a go at this book and its qui…
... />
Having never delved into machine code before I thought id have ... -
Free web-hosting recommendation?I'd like to publish a basic html formatted version of my machine-code tutorial to the web (the unformatted version is at [URL]http://www.worldofspect…
... html formatted version of my machine-code tutorial to the web (the unformatted ... -
Adjusting your code for screen refreshingOk, I'm aware that I should know it already after writing 5 Spectrum games in machine code but interrupts and screen refreshes were always my weaker …
... writing 5 Spectrum games in machine code but interrupts and screen refreshes ... must of course adjust my code for screen redrawing.
... I perform HALT command in machine code, the computer will wait ... Is there any way in machine code to determine where is my ... -
Resolving USR entry point into a data + m/code block?Well, I had another look at that Merlin listing and decided that blowing up the faint page made it possible to read everything (with a struggle). How…
... instructions expect 8768 bytes of CODE - there are 9594.
+ The ... of some sort rather than machine code. So my question is: How ... USR address to start the machine code? -
WTF stupid machine10 LET X = 28672 or 61440 depending on how much memory you have 20 LET A$ = ?? 30 IF A$ = ?? THEN INPUT A$ 40 LET Y = CODE A$ ? 48:IF Y>9 THEN LET Y …
... A$
40 LET Y = CODE A$ ? 48:IF Y> ... ? 7
50 LET Z = CODE A$(2) ? 48: IF Z ... />
Im learning machine code from the book mastering machine code on your zx ... -
Machine code issue...Hi Folks, My trials with MCODE continue and I am stuck. I wrote the following program in BASIC to simply POKE an attribute byte in to a "box" on th…
... screen.
[CODE]1005 REM Attribute Block Routine ... br /> RETURN [/CODE]
This code works perfectly and ... .
[CODE]MCODE Version
Parameters:< ... C9 RET ;RETURN to BASIC[/CODE]
When ... -
Another machine code problem, sorry[CODE] OPCODE HEX ADD LD A,00 3E00 F000 PUSH AF F5 F002 LD B,05 0605 F003 LD C,06 0E06 LOOP F005 POP AF F1 ADD A,C 80 DEC B 05 …
[CODE]
OPCODE HEX ADD
< ... ),A 3200FA
RET C9[/CODE]
This is a ... -
Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
... Game Compo which involves a machine code routine.
The z80 ... nice to see how the code could be optimized.
I would belive my code is probably very uneffective the ... reachable by JR.
[CODE]
org 50000
z80 machine code assemblerHi everyone, Which assemblers have a nice user interface. Because i want to code in assembler on the computer and then assemble it. I dont want a co…
... interface. Because i want to code in assembler on the computer ...Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
Hi everyone,
How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet?
When you kill something, do you just stop displaying it?
thanksHow to code a run and jumpHi all, Is there a way in basic to take action on two simultaneous key strokes. I want to add a run and jump i.e. keys Q and M but using inkey$ seem…
... . I am not ready for machine code yet so would like to ...machine code loadercan someone have a look at this loader and break down what its actually doing and also how i can stop it from executing the 2 loads of headerless blo…
...
cheers
[CODE]
5B00 LD SP,5BFF ...
5B3B NOP
[/CODE]Using Boriel's ZX Basic to learn assemblyI wrote a small guide. Hopefully some people will find my gibberish useful - especially people looking at first steps in machine code, where I think …
... looking at first steps in machine code, where I think writing small ... .com/forum/how-to-tutorials/tutorial-how-to-put-inline-assembly ...Sound designer wantedAs you may or may not be aware, in a complete IP violation, and written up as a HOW-TO tutorial, I'm writing a pac-man clone. But I'm crap with soun…
... up as a HOW-TO tutorial, I'm writing a pac ... (think microfine bursts)
A machine code routine
I could include ... publish as part of the tutorial
(of course I'll ...Best books & Sugested reading..Hi i was trying to search the forum but couldnt find it. Looking at WOS there is a number of books on BASIC, programming, machine code ect.. I mess…
... of books on BASIC, programming, machine code ect..
I ... that all the boring machine code and interface I articles ... about as interesting as watching paint dry or the examples ... am reading Introduction to Spectrum machine code now.
But ...Machine code loopsThis might sound a bit daft, but I,ve forgotten how to do loops using th 'b' register... I want to loop this x mount of times: [CODE]ld a,r and 6 i…
... mount of times:
[CODE]ld a,r
and ... /> call 43100
call 45000[/CODE]
There is any ...Machine code RST10 problemHello! After 27 years of playing with Spectrums I'm starting to look into doing assembly language properly. All went swimmingly well until I wrote …
... underlying colour alone:
[CODE]
;
; Output of Messages ... /> .msgfir defm " PRESS FIRE "
[/CODE]
On entering the ...I thought I'd give assembly a goAnd well being an absolute newb,I'm absolutely useless.I need your help. I thought I'd give this a go in zxspin [url]http://chuntey.wordpress.com/20…
... .com/2010/01/12/tutorial-zx-spectrum-machine-code-game-30-minutes/[/url ...running this game in zxspin assemblerHello all I've written this game out in the zxpin assembler. [url]http://chuntey.wordpress.com/2010/01/12/tutorial-zx-spectrum-machine-code-game-30-m…
... .com/2010/01/12/tutorial-zx-spectrum-machine-code-game-30-minutes/[/url ...CODE SCREEN$ in MCIs there any way of determining what character is displayed at a certain co-ordinate from machine code like the 'IF CODE SCREEN$=' arrangement in bas…
Is there any way of determining what character is displayed at a certain co-ordinate from machine code like the 'IF CODE SCREEN$=' arrangement in basic?Machine code assistance please #1Dear all, Learning the ropes here, so please excuse these odd questions which may seem simplistic to you learned lot. This routine is placed at 33…
... it gives me 32867.
[code]
ld l,155
ret
[/code]
When I add ... the beginning, the following...
[code]
ld hl,0
ld bc,0
[/code]
...it seems to work ...Starting with assemblyHi Guys, I am looking forward to following this guide [url]http://chuntey.wordpress.com/2010/01/12/tutorial-zx-spectrum-machine-code-game-30-minutes…
... .com/2010/01/12/tutorial-zx-spectrum-machine-code-game-30-minutes/[/url ...Machine code optimisationI'm geting back into z80 coding and wonder what the best way of showing how efficient the code is. I've got Rodney Zaks book and see there are timin…
... of showing how efficient the code is.
I've ... to determine how fast the code runs?128 BASIC-compatible way of loading BASIC as code?On a 48K Speccy (or from 48 BASIC or USR 0 mode on a 128K machine), one can do a silly trick like this: [code];; load a 4000 byte BASIC program ld i…
... machine), one can do a silly trick like this:
[code ... (23620),1
ret[/code]
Ta-da, BASIC ... total crash. Loading BASIC as code from the 128 BASIC interpreter ... ; it's the return from machine code that doesn't.
Self modifying code ??I made a game in C that was mostly accessing arrays and using FOR NEXT loops, I ran out of memory, so I was thinking would it be possible to use sel…
... possible to use self-modifying code so that say 20 FOR ... NEXT loops use the same code?
or 20 array look ... ups can use the same code?
When using C ... always write out all the machine code necessary to do loops and ...How did you learn to code on the Spectrum?Got to be honest, as much as I wish I did, I don't know anything about programming. I had a Spectrum (+2 and then +2B) when I was a kid, and my prog…
... ended, I started reading about machine code (in fact one of my ... seeing you all exchange assembly code and wondering how the & ... these guides on how to code, but I can't for ... an "easy" guide called Mastering Machine Code on your ZX Spectrum. Needless ...Simple bit of machine code not working [SOLVED]ishHi all. It's late and I'm tired and I have no idea why the following piece of code wont display a little smiley face [code]ld hl,udg ld (236…
... why the following piece of code wont display a little smiley ... face
[code]ld hl,udg
ld ... ,126,126,66,60,24[/code]
I'm using ...
