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How to write a simple BASIC* horizontal scrolling game (Tutorial) [b]How to write a simple BASIC* horizontal scrolling game[/b] In this tutorial, we will be talking about how to write a simple BASIC* horizont…
... in machine code.
[b]A) Drawing a scrolling screen ... br />
We start with drawing a screen that scrolls. It's ... and Line 300, where we print a character to the right ... . Try replace line 100 with that and see what happens ... -
Textured Scanline Flood Fill for ZX Spectrum 48KPity that it's quite hard to contribute code to WoS in a straightforward manner. Recently, I have created a textured/hatched fill M/C routine for the…
... quite hard to contribute code to WoS in a ... fun!
[code]
1 REM Colored Pattern ... Leave some space for shadow screen buffer
20 ... 380 POKE 63692,196: REM lower byte
390 POKE ... STOP
9000 PRINT "{AT 10,11}WAIT..."
How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…
... a bit of machine code to load register A with 100. Pretty dull ... /> This is because BASIC will print the contents of the BC ... data that makes up the screen is stored from memory addresses ... and hence jump to a machine code programme.
So there ...Speccy machine code info where is it?Recently I've been trying to learn Z80 and I've managed to make limited progress (some of my routines even compile now!) but I seem to be having trou…
... /> The dark art of speccy machine code is obscure and mysterious, thats ... into three "blocks", with each block dividing the screen into three equal ... (0-31)
To print a character at (10,12 ... lines denoted by "SSS". To print the letter 'A' there:
Text compressionI'm sure I remember seeing a short machine code routine published in a (very random) multi-machine listings magazine way back in the mists of time, w…
... clue...) which will redefine the PRINT grid to 42 columns of ... BASIC program to redefine capitals, lower case and numbers generated a ... Defender, with the option to SAVE the character set as machine code when ... C routine for the revised PRINT grid before or after ...42 column text, Sinclair Print Utilities, etcI'm currently developing the next of the ZXIF text adventures - "43 Minutes" and, as a side issue, I'm really interested in 42 column text for this g…
... the machine code routine. The problem this presents us with, insofar ... , the screen). In order to interface this with PAW, ... the Print Utilities machine code routine rather than straight to the screen. ... catalogue promises it comes with 'full documentation,' so ...Making a mapI should learn Z80 assembly, but I don't have the time (really busy) and I feel like making a game. I've tried with Colt which gives me enough speed…
... s essentially your BASIC code efficiently translated into machine code. RST 16 is ... the call for BASIC's print routines ... 't know what you mean with "Start MC in upperscreen" and ... top and bottom of the screen are treated differently.PRINT AT in assembler Hello everyone, I am very new to this forums. Like perhaps many others I had a Spectrum as a child and did pretty much simple BASIC programming, bu…
... /> When using RST 16 to print you should first select an ... stream. This can be done with
LD A,2
code with
RANDOMIZE USR address
the upper screen is ... />
In your example the lower screen would be used in such ...Wanted: Game Ideas!Ok then here goes nothing. I'm a reasonably good programmer, but I'm really no good at coming up with game ideas and graphics. So if any of you have…
... is knock up a single screen with some graphics and see ... commands include "subroutine calls" (print a printstring stored elsewhere and ... that this is a small machine you're writing on -- ... problem solver / suggestion giver / code segment writer whether that be ...New - BASin r13a is available for downloadHi all, Here's the latest BASin. Mostly just bugfixes, but also now has the upgraded UDG editor which can now edit multiple UDGs on one editing gri…
... the list, the editor updates with the relevent character. This is ... PRINT to display your graphics and not some user written special machine code ... the required characters on screen
110 PRINT "CD";CHR$ 8; CHR ...Graphics in Basic??What is the fastest way to draw high rez graphics in Basic. Andrew.
... know you can combine simple machine code with basic programming, but dont know ... ,x;"ABCDEFGH"
120 PRINT AT y+1;"IJKLMNOP"
160 PRINT AT Y+3,x;"DEFGHIJK"
[/code]
< ... to the relevant place on screen with the relevant colour attributes. Or ...Timex Sinclair 2068Hi guys. This is my first post here, the first of many, I hope.. :) I have a Timex Sinclair 2068 but don?t know much about it. It was given as a gif…
... adjust colour on screen. If you're not comfortable with doing this ... Date 09/15/1983
Lower Frequency 54.0
[/quote ... is a short machine code program with song data following. The machine code updates the ...TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…
... screen as normal, (c) 1982 Sinclair Research Ltd, but only lower ... over it several times with a circuit diagram and ... all of RAM in a machine code program, can you make ... if it does not fail with BASIC, but the ROM ... had something to do with either speed or input/ ...hiding file names while loadinghello, i just found my old home grown game Bubble Bobble The Adventure in original form, so i'm trying to convert it from TR-DOS to TZX for submitti…
... a section of the screen that has no graphic ... and PRINT AT that line; or if you know machine code you ... could call the load routines with the ... the filename up on the screen at all (in case ... there is no screen room)
...hiding file names while loadinghello, i just found my old home grown game Bubble Bobble The Adventure in original form, so i'm trying to convert it from TR-DOS to TZX for submitti…
... PRINT AT that line;[/QUOTE]
unfortunately, no. the title screen ... is full screen.
[QUOTE]or if you know machine code ... you could call the load routines with the relevant ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... write output (eg print text to the screen). Instead C is extended ... , is written for a z80 machine with a crazy display layout in ... have to include any actual code. The code is stored elsewhere. An ... elements in the array with []s:
[code]
m[0 ...Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... to further shrink down the code for the previously submitted space ... of replacing the POKE statement with IF, THEN, and changing ... ;
to
PRINT #1;s;
but ... location printed to in the lower screen does not home itself back ...Your help needed![FONT=Arial]there are [URL="http://www.worldofspectrum.org/neededscreens.html"]a number of titles[/URL] (146) that still lack an in-game scre…
... ). I explain below the problem with each one.
... if they ever do print to the screen). The screenshot I ... two checksums generated by the machine code loader both fail. Therefore there ... file appears to be obliterated with the 'X' characater, leaving ...Your help needed![FONT=Arial]there are [URL="http://www.worldofspectrum.org/neededscreens.html"]a number of titles[/URL] (146) that still lack an in-game scre…
... Possibly could be solved with an emulator monitor program ... br /> This example pascal program, with a compile directive embedded in ... I've examined this small machine code routine. It calls the 128K ... never seems to print anything to the screen. (Nothing to grab ...ANNOUNCE: BASin r14 is up. New SCREEN$ paintbox included.Hi all, Well, I can't sit on this any longer - so I've released it. Let's all get a good testing session going, eh? You can get the new BASin [url=…
... of letting us select a screen area? Yes, I would ... something similar in Basic and with some machine code routines from Bloodbaz, but ... scr2udg. The character-to-Print-Lines sounds a lot better ... that converts a screen to strings (which, combined with a 4x4 ...CSSCGC 2008 has now officially begunFor coming last in the 2007 crap game compo, I have the honour and privilege of hosting CSSCGC 2008! I have now put up the CSSCGC 2008 website at …
... lower the loop used to plot the stars on the main screen ... the delay by replacing this with a machine code routine that does exactly ...Microdrive Help...Hi All, I need a little help.. I would like to transfer one of my all time favorites to microdrive "Atic Atac" (for which I have an original tap co…
... will shrink the
machine CODE of your programs (which can ... . Using this
utility, screen displays can be reduced by ...
large block of machine code with a low load address (the ... loading into address 25000 or lower). Such blocks cannot, for example ...Microdrive Help...Hi All, I need a little help.. I would like to transfer one of my all time favorites to microdrive "Atic Atac" (for which I have an original tap co…
... ve just been playing around with "The Prince" - only ... br /> 3) The process finished with "M RAMTOP no good 0 ... me, but doing a PRINT USR 0 then LOAD *" ... doesn't use the loading screen though :-(
... a small bit of machine code to move it back ...Wrong File Type, 0:1Ive gone thru an entire transform box full (20) of cartridges containing spectrum games that i wrestled off bay last year, yet not a single one will …
... tiny SCREEN$ (256 bytes of attributes) followed by the main CODE ... Manic Miner code.
Manic Miner begins at 33792 with the ... GOTO 30[/CODE]
This program will finish with the ... we need the PRINT to CODE convertor :
[CODE]10 CLEAR ...oh my the old days :)programming on the speccy again here is a routine i remember of the top of my head to load screens or code without a header wow 5 Clear 27999 : Re…
... 201
90 PRINT "I am loading your code"
100 ... PAUSE 0[/CODE]
The machine code itself:
[CODE];
... br /> ret ; 28013 201 10ts[/CODE]
You can ... com/headerless.zip"]here[/URL] with sample headerless screenAny BBC aware Specchums out there?After the UK101 and VIC20 emulators I've moved my sights onto emulating a BBC computer. This emulator will be different though in that it will be a Z…
... think. The following program
[CODE]10 PRINT "AND ON ";
20 ... short, if a BBC BASIC / machine code program runs "on the tube ... must consider writing to the screen, printer, RS423 and file ... enabled or disabled, and cope with multibyte VDU sequences. I' ...VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…
... /> Avoid the walls or colliding with yourself.
I ... , and then importing the machine code directly into Jimmy's " ...
; Clear the screen
LDA #147
JSR ... /> STY WORMHEAD
; print worm on new position
BASin r14c - maintenance releaseAfter the recent discussions, BASin has been released as version 14c. It's only a maintenance release, and some of the really big new features are un…
... in your case, INT in PRINT). Fixed.
print "this works": next f: copy
generates half a screen ... (all one word, lower case with comma) is accepted but ... following program :
[CODE]10 FOR i=0 TO ... br /> 30 NEXT i[/CODE]
Now add two ...Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... /> defm "Print at 10,10"
defb 255
[/code]
... self. This is done with code 255 at the end of ... sure to start your program with PRINT USR start where start ... the upper-screen (the screen above the inputlines) or the lower screen (the ...
