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The Spectrum's spectrumappears to be missing a few things... specifically I'm wondering about pink and brown my hazy attempts to mix red and white are not proving very su…
... to use brown and pink in a game but running into ... choices...
Write some machine code that constantly flips the attributes ... select the right base colour set it should work due to ... -
display file addressing; screen slicingWhile working on this Compendium I'm updating or rewriting a lot of stuff. One thing I eventually came to appreciate was the simple & clever way in w…
... bit shifting and OR operations in BASIC... which was fun. ... to read.
[CODE]10 REM plotting with poke ... 12 PAPER 0: BORDER 0: INK 6: CLS
20 GOSUB ... table used to place pixels in a byte
1005 ... Check for even and set bit
1230 RETURN[/CODE] -
SE BasicAfter 13 years of development I thought I'd run out of things to optimize, but it turns out I was wrong. However, I'm now running out of time to work…
... 1.
[*]8-bit character set support: UDG 0.
[*]8 ... calling machine code.
[*]Chloe font specially designed for maximum legibility in hi ... .
[*]Scroll counter increased.
[*]Set the permanent attribute: COLOR 7 ... -
IF EXIST?In MS-DOS scripting, there is an IF EXIST command that lets you check wether a file exists in disk or not. There are any way to check it out from BA…
... possible to write a machine code routine to do the ... , it's important to set up the environment properly, ... 0 and the machine stack resides in this area (unless ... /> (right).
In BASIC (using DOS)
(after ... -
SoftPLAY: Use the PLAY command from 48 BASICNow you don't need 128 BASIC to use the [B]PLAY[/B] command. Just use [B]PRINT #8;[/B] instead. [url]https://dl.dropboxusercontent.com/u/15659782/So…
... /> Yes. The full set of PLAY syntax including MIDI ... one of the routines in the editor ROM triggering ... did however prepare the machine code routines for my laserharp ... are present in the 128 ROM version of the code.
... ROMs you can use in place of the BASIC ... -
SoftPLAY: Use the PLAY command from 48 BASICNow you don't need 128 BASIC to use the [B]PLAY[/B] command. Just use [B]PRINT #8;[/B] instead. [url]https://dl.dropboxusercontent.com/u/15659782/So…
... ]Yes, but you need to set the ch-add system variable ... to write a machine code routine for an in game tune in 48k mode ... -
SoftPLAY: Use the PLAY command from 48 BASICNow you don't need 128 BASIC to use the [B]PLAY[/B] command. Just use [B]PRINT #8;[/B] instead. [url]https://dl.dropboxusercontent.com/u/15659782/So…
... to write a machine code routine for an in game tune in 48k mode ... if you already have a set of PLAY commands for the ... -
Problem with Pasmo Assembler/Speccy emulator?I'm at the start of trying to learn Z80 assembly for the ZX Spectrum. I'm using Speccy 1.7 as my emulator, Pasmo as my assembler, and am following t…
... program on this page in notepad, assembled the way ... selected rewind and start tape in the emulator settings, after ... command to run the machine code, did you by any ... version (HTML), which is in chapter by chapter form, ... and how to tune in your TV set, plus it gave ... -
Bomb Munchies - preview releaseBomb Munchies Preview release Version 12th Jan 2014 [URL=http://s979.photobucket.com/user/MatGubbins/media/bmsix_zpsc33279a2.gif.html][IMG]http://i…
... am still a novice at machine code (anyone experienced with Z80 ... the Bomb Munchies game code would probably be gnashing ... extra four players to the code - just got to ... and crowbar the movement routine in - they would all ... of keys can be set aside for either a ... -
Idiots Guide......To machine code, or assembler language...whatever the appropriate term is Basically at this stage I want to fiddle about and try and get used to…
... recognize a data pattern in the code that can map ... />
The entire set of standard C libraries are ... lot about how a machine works by learning assembly ... same view of the machine as assembly language (you ... But you can't just code in asm using a C compiler ... -
+3 Disk drive motorHi, I'm creating a disk file menu selector. I was wondering how to turn off the +3 drive motor and the motor timeout check from Basic (poking the co…
...
randomize usr val "xxxxx"[/code][/QUOTE]
Another reservation ... approach in BASIC is that if bit 3 is already set then ...
SET 3, (HL)
RET
[/code]
And the machine code is ... -
How to print logo onto screen at chosen coordinates?Hi, I've just got back into zx spectrum games after all these years and after seeing some of the great games on here I would like to start learning p…
... etc :razz:[/QUOTE]
Machine code is almost impossible to learn ... (with some help)
Machine code is just something you have ...
Here is how you set the high byte:
The ... colors each(this results in color clash in some games)
... -
ZX Spectrum code examplesThe shortage of sites with decent code examples seems to be few. The links to alot of sites that used to host them are disappearing into the ether. …
... pixels being set or cleared. Each address in that range ... The value you poke in will change the character ... /> Bit 2 to 0 = Ink colour
Mapping ... which are represented by the set bits in that byte.
... was just easier to code up the firmware/ula ... -
Programming again with the ZX SpectrumI am going to take a blast at programming for the Spectrum again. Its bee a long time since I have done this. I need to refresh my memory and maybe l…
I'd suggest going straight in with machine code. Trying to pick up BASIC ... , and get stuck in. On a PC, set yourself up with a ... be put in the 'BC' register(s) when your machine code program runs ... -
+3 Disk drive motorHi, I'm creating a disk file menu selector. I was wondering how to turn off the +3 drive motor and the motor timeout check from Basic (poking the co…
... 748714]Here is the assembly code to do it safely:< ... br /> [code]
MotorOff:
LD HL, 23399
SET 3, (HL ... )
RET
[/code]
And the machine code is ... />
I'm using this in my assembly program now, I ... -
+3 Disk drive motorHi, I'm creating a disk file menu selector. I was wondering how to turn off the +3 drive motor and the motor timeout check from Basic (poking the co…
... ANY routine in the +3DOS ROM, you must first set the stack ... +3DOS routine - always remember to set up appropriate entry parameters where ... onwards, in the section "Chapter 8, Part 26 - Using Machine Code".
Just ... -
+3 Disk drive motorHi, I'm creating a disk file menu selector. I was wondering how to turn off the +3 drive motor and the motor timeout check from Basic (poking the co…
... ANY routine in the +3DOS ROM, you must first set the stack ... +3DOS routine - always remember to set up appropriate entry parameters where ... onwards, in the section "Chapter 8, Part 26 - Using Machine Code".
Just ... -
Is ESXDOS flexible enough to incorporate e.g. Spectranet commands?I was just discussing the idea with someone about the wish some people have to be able to combine interfaces such as DivIDE (Plus) / DivMMC EnJOY! wi…
... supply a decimal state machine:
[code]
__stdio_scanf_sm_decimal:
< ... written)
; bc = remaining space in buffer
; consume ... , terminate iteration with carry flag set
[/code]
HL' ... -
Best game writte in BasicThere's probably already a thread about this but who cares. I'm going for Rebelstar raiders.
... contained a fair bit of machine code.
[QUOTE=zxbruno;756386 ... when I saw a Jet Set Willy (or was it Manic ... Miner?) written in Basic. There were also some ... games made in Spain in the past few years ... -
Tile routinesHi all, Please does anyone have any examples of tile routines in pure asm to set up maptile screens. I would like to try and understand them and ti…
... is taken from "advanced spectrum machine language"
ld ... ,a ; address of screen position in de
ret
; ... paper, black ink
END startp[/CODE]
< ... -
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…
... - well, at the simplest level, machine code only really does a few ... values from registers in locations in RAM, it adds numbers in registers... and ... look at the Z80 instruction set, you'll notice a lot ... a register (the 'a' register in this case), and then storing ... -
TAPlist - the emulator versionI've got this working reasonably well; there's just a couple of small extra features which I want to add. (Recall that TAPlist writes a formatted lis…
... )))):
STOP:
PRINT "no code":
STOP:
PRINT "bad ... the runner set up to go. Although the m/code file is ... , as that will delete the machine code and then it won't ... work very well.(The m/code is in the string a$() - for ... -
Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…
... second screen can be set up in the memory that follows the ... includes the system variables, only machine code programs could do this trick ... -
Spectrum as a business machineI was just looking through an issue of Crash from 1987 and found the Tech Niche section rather interesting. They reviewed a Videoface video capture …
... a character set design tool which only just fit in the Speccy ... out! There was also some machine code stuff. All I have left ... -
Fast and easy read/write of attributes?What are the fastest or easiest ways to check the attributes of tiles on the screen, in BASIC? It seems to be a great way of storing object info. …
... be done fairly easily in BASIC ...
[code]
[b] ... n
[b]REM set n,(address)[/b]
... ,byte+2^n
[/code]
... but the exponent ... and resetting every bit in turn in byte (23681), takes ... FN statements to some machine code to use the Z80 ... -
Fast and easy read/write of attributes?What are the fastest or easiest ways to check the attributes of tiles on the screen, in BASIC? It seems to be a great way of storing object info. …
... DEF FN statements to some machine code to use the Z80 bitwise ... "Bit Operations in BASIC: AND,XOR,OR,BIT,RES,SET,CPL"; it ... 's also in the [url=http ... . I did do a set of m/c routines to ... BASIC, which are also in the Bitwise section of the ... -
Change PAPER and BORDER colours from machine codeHow do you go about changing PAPER and BORDER colours from machine code? I've forgotten the system variables for border and paper.
... colour from machine code you do OUT 254,A
You set the ... ROM and change the colours in the code. I might be imagining ... a bit of the set-up in your own code, then jump into ... -
Jetset Willy ATTR Buffer 2Does anyone understand how Jetset Willy uses the system vars area as screen ATTR buffer 2? H5C00 D23552. Thanks
... return to BASIC after that code over-writes all the system ... want to call snippets of machine code from BASIC to copy data ... that your machine code routine and any data buffers are placed in memory ... uper limit in memory for the BASIC area that you set with ... -
Robot SantaAlien Ferox has grown beyond what could be accomplished on a humble Speccy - i've run out of memory AND ideas so that's indefinitely halted. BUT In…
... colors ? or use some ink that is different from white ... number
then in the x sprite event write ... b is another counter (also set in the main loop event:
in my example or to the ... to set b=0 in the first part of the code otherwise ...
