-
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]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 ...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 ...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 ...how to load machine codeI'm reading Jon Caldwell's how to write Spectrum games but can't enter the code! Here's an example:_ LD BC, (score) Call 6683 I tried putting…
... but can't enter the code! Here's an example:_ ...The Complete Machine Code Tutor - bug?Dear all, I'm having a fiddle with The Complete Machine Tutor and have come to the bit where they're adding registers together. The image on the l…
... a fiddle with The Complete Machine Tutor and have come to ...The trouble with good code isLots of times I've come here to ask for help and always got it pretty promptly. Which is wonderful and one of the reasons why I don't think there's a…
... trying to learn hex and machine code until I have a thorough ...Using BASIC from Machine CodeHi Folks, Came across a very interesting article by Toni Baker in Your Spectrum: http://www.users.globalnet.co.uk/~jg27paw4/yr11/yr11_66.htm …
... 's assembler:
[code]
ORG 62000
[/code]
The above ... it via:
[code]100 CLEAR 61999
110 ... /> 120 LET A=USR 62000[/code]
The Spectrum crashes ...Amiga chit chat (sorry but it never really was a commode designed machine)I wish there was a forum like this for the Amiga, perhaps there is but I tried a few and they mostly seem pretty moribund and lots of the links at Am…
... /> Since I'll never master machine code - maximum kudos to those of ...Prefered Tools for Developing Maching Code in 2021I am considering this year to fulfill my goal of actually writing machine code programs for the ZX Spectrum. I am an accomplished object oriented cod…
... my goal of actually writing machine code programs for the ZX Spectrum ...Last Problem in Chapter 3 of Toni Baker's Mastering Machine Code on your ZX Spectrum.Chapter 3 of this great book is all about how to use the registers and covers the operations LD, ADD, ADC, SUB, SBC, INC, DEC, SCF and CCF. The la…
... would be appeciated.
[code]Op Hex Notes
LD ... C9 Return to basic
[/code]whats your second favourite retro computerOk i'm going to assume that for most of us here the speccy is our favourite number 1 retro computer,its the best home computer in the world etc etc :…
... writing superb and very clever code. And the games I refered ... them next to a C64 scroller you like and tell me ... help novices to migrate to machine code. period. I should know because ...3d Code... simple Anyone know where I can get some examples of 3d routines written in basic... I`ve done some googling, and come up with some source for PowerBasic or…
... - the jump from BASIC to Machine Code - I know, I was there ... took the jump into Z80 Machine Code as it looked too daunting ... a scroller using ROM routines, then using my own screen code, then ...What was the first game/program you wrote?Mine: ZX81 - a centipede clone with just one piece to shoot at - I called it Monopede :D Spectrum - a Basic game co-designed with a friend. I prog…
... side-scroller (which was my first attemp at integrating machine code with BASIC ... .),a Bingo game (with a machine code "search" routine). Also dabbled with ...Sam coup? - some questionsHi everyone. Got myself a sam coupé without any kind of cables. I was a bit suspicious about it's working condition. Hooked it to a pc at psu a…
... , and my first machine code program was a simple scroller using the ROM ... another scroller but not using ROM routines, writing all my own code ...Sam coup? - some questionsHi everyone. Got myself a sam coupé without any kind of cables. I was a bit suspicious about it's working condition. Hooked it to a pc at psu a…
... tinkering while starting out with machine code program back in the early ... !
Although the first scroller I can remember reading, must ...Sam coup? - some questionsHi everyone. Got myself a sam coupé without any kind of cables. I was a bit suspicious about it's working condition. Hooked it to a pc at psu a…
... , and my first machine code program was a simple scroller using the ROM ... another scroller but not using ROM routines, writing all my own code ... !
i always liked scroller`s, they gotta have a ... keep you reading... best/fave scroller for me is the E ...
