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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 ... -
They're here ! BASIC horror themed games[IMG]http://i1163.photobucket.com/albums/q541/Rygarman/theyre_here.jpg[/IMG] Because its my birthday tomorrow (38 years young) I am making these ga…
... ?s strength is at zero, if yours reaches zero, you die ! I ... ? and the unofficial ?Dracula? borrow code from a type in game ... etc.
Looking at the code now I can hardly remember ... in games from books of code and painstakingly try to work ... -
Speedlock Source CodeOooh - found some interesting Amstrad/Spectrum Speedlock source code over at [url]http://web.archive.org/web/20070126232648/http://andercheran.aiind.…
... interesting Amstrad/Spectrum Speedlock source code over at [url]http://web ... -
Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…
... 'm adding support for reading code execution logs produced by emulators ... of working out what's code and what's not in ... can do some kind of code execution logging or profiling, for ... -
Compiling Lisp to Z80.I am doing some thought experiments on this. Here is an example of a Lisp program. It adds two numbers together. [code] (define (add x y) (if (= …
... /> [/code]
then, compare the first argument to zero, and ... to THEN if it is zero
[code]
cp $00< ... call add
ret
[/code]
This is the ... push b
ret
[/code]
Of course, this ... -
Biturbo 2 turbo loader now available for general useAfter tinkering with its code, extracted from a TZX of one of the infamous Italian S.I.P.E. "tape magazines" which published hacked games for the Spe…
After tinkering with its code, extracted from a TZX of ... the process of adapting the code to your needs by calculating ... - 714; Sync 2 pulse - 714; Zero pulse - 486; One pulse - 833 ... -
Relocating a block of code as to work on a 16k spectrumI've written a game in from 50000 to 65535 and was wondering if there were any way to relocate the entire block of code to work on a 16k Spectrum. I…
... relocate the entire block of code to work on a 16k ... will move a block of code and alter all the jumps ... -
Freescape based on reverse engineered "I of the Mask" code?That's what Sandy White has said in this interview just published on Eurogamer: [url]http://www.eurogamer.net/articles/2013-03-06-code-britannia-san…
... .net/articles/2013-03-06-code-britannia-sandy-white[/url]
code and based the Freescape engine ... -
Assembler v Machine CodeHi. I've been looking at a lot of the code examples in the Development section and can see that Assembler is the way to go. However, I was wondering …
... at a lot of the code examples in the Development ... actually codes in neat Machine Code?
I use ... total control over the actual code, and where various variables are ... to replace a lot of code if I need to ... an example sheet with some code on it, but I ... -
Using FOR/NEXT like 'while'I don't know if this has already been discussed (I did search, but the search engine didn't like the word 'while'), but here's a way of using a FOR/N…
... 'while' loop in BASIC:
[code]
1 REM While loop ... : NEXT d: NEXT i
[/code]
The FOR d loop ... , because i will always be zero until the condition has been ... -
plus d machine code loader issueas many of you know i have done / been doing quite a few tr-dos recracks for the plus d but i have come into a bit of a problem the plus d machine co…
...
the plus d machine code loader requires you to have ... after is a bit of code to put before the loader ... -
How to test Z80 Code?Hi All, Is there a way to test a block of z80 code (nothing speccy specific in it) with many different inputs? The reason I ask is that I'm writing…
... test a block of z80 code (nothing speccy specific in it ... and want to check my code's output for every combination ... -
PENTAGRAM and THE CODEHey, I have these two games up for grabs. Pentagram needs no introduction. Just note that the clam is missing 3 of those little thingies that hold …
... loads fine :)
The Code is a 1984 release, or ... -
Hacking a game MAJIKAZOHello, I am trying to put a recent game called MAJIKAZO on disk. However, the loader is written for tape only, so I have to find a way how to rewrit…
... , then it loads a code and starts machine code. This is the ... /> Why they put SP to zero. So any RET command will ... -
Machine code loopsDear all, 30 years too late I know, but I'm finally starting to get to grips with Machine Code - something I could never manage back in my early tee…
... get to grips with Machine Code - something I could never manage ... -
Are these files of any use to anyone? (MANIC MINER MUCH FASTER AND SMALLER CODE)I've not touched any of this for 3 years, I thought I lost it when I had to reformat my C: drive. EDIT: These links might work Z80 source [url]http:…
... did rip off the movement code from the JSW disassembly after ... -
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 ... -
Zero 0.6I'm pleased to announce that I've released Zero 0.6. There are some comprehensive changes in this release including moving to .Net 2.0, removing Slim…
... announce that I've released Zero 0.6. There are some ... -
SkoolKit 3.4SkoolKit - a suite of utilities for creating disassemblies of Spectrum games in HTML (and ASM) format - has reached version 3.4. Some of the new stuf…
... /> [*]Use code execution maps produced by the Fuse, SpecEmu, Spud, Zero and ... Z80 emulators to distinguish code from data (and ... .py[/i]
[*]Get the code from [url="https://github.com ... -
How to write self-relocating code using Pasmo?With z80asm, I can write code like this: [CODE] org 0 ; a total lie, but makes the reloc sums work .dest: equ …
... ; target address of relocated code
ld bc,.reloc_start ... ld bc,.reloc_len ; length of code to relocate
ldir ... lots of code
;; lots more code
;; even more code
< ... -
BIFROST* example: "Knights & Demons DX" source codeA package containing the source files of our multicolor game "Knights & Demons DX" is now available for download [URL="http://www.mediafire.com/?hbch…
... ' timer (multiplied by 100)[/CODE]
The ... br /> BIFROSTstart() ' enable BIFROST*[/CODE]
This ... () ' wait for next frame[/CODE]
Even ... -
trying to read keyboardI have the speccy in interrupt mode 1 I used 'IM1' in assembly language then Im printing the contents of memoryu area 23560 to the screen: [quote] l…
... /> ld a,#22 ; ASCII control code for AT.
rst #16 ... /> Im even loading the number ZERO into 23560 but it makes ... -
Adding a pause key to ArkanoidHaving rediscovered the simple pleasure of playing 1980s games on genuine 1980s hardware, I've also remembered that emulation can provide a feature m…
... interrupt handler
jr .return_to_game[/CODE]
(Arkanoid installs an ... top of RAM?
[CODE] call 0xfcb5 ;0xfcb1
ret ... Speedlock timer permanently stuck at zero.
[*]Use playtzx or ... -
Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... a spectrum in assembly/machine code... No fancy screen shinanagins, ... "/program loader.
[code]
10 LET X=61440 ...
Paired registers
[code]
03 = INC BC
3C
C9
[/code]
returns... 61440...
Squishing code up nice and small then unsquashing it in assemblyI refer of course to data compression. I've done a search and there are lots of good compressors, but I can't seem to find one that works in assembl…
... a short bit of assembly code (exactly what I'm after ...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?Machine code/Assembly language back in the dayHello. Back in the 80s when I was a kid, I didn't learn Z-80 machine code, but I was always curious about it. Just recently I decided to explore Z-…
... attempt at learning machine code on the Spectrum made ... reset and editing the code, which is still waiting ... assembler window. However, writing code on a real Spectrum ... crashing in case bad code is executed? Did they ... who were learning machine code back in the 80s ...Converting Basic code into machine codeIm just interested to know if I can converter a game I've written in basic into Machine code, Is their a program that can do this??
Im just interested to know if I can converter a game I've written in basic into Machine code, Is their a program that can do this??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…
... trick like this:
[code];; load a 4000 byte BASIC ... (23620),1
ret[/code]
Ta-da, BASIC ... total crash. Loading BASIC as code from the 128 BASIC interpreter ... 's the return from machine code that doesn't.
