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Asking for help: ZXBC to ASM routine translationHallo, In order to save some bytes and gain speed, I'm asking for translation of a very simple ZXBC routine to Assembler [code] sub light(x as uinteg…
Hallo,
In order to save some bytes and gain speed, I'm asking for translation of a very simple ZXBC routine to Assembler
[code]
sub light(x as uinteger,y as uinteger,intensity as ubyte)
dim adr as Uinteger
if x -
A 128 Routine to Put Tokens in StringsI was writing a DEF FN on the +128k and decided that I'd had enough of not being able to put function tokens in strings without a great palaver and s…
... I wrote this little BASIC routine to do it for me ... -
checksum routine from Space GunThis routine starts off with HL=$ffff and a file header read from tape, for each byte of which in turn it assigns to A and calls this routine, ending…
This routine starts off with HL=$ffff ... to A and calls this routine, ending up with another value ... -
Checksum routine wantedI wish to make a program that verify integrity of a Multiface 1 ROM. It is possible to compare each byte of the ROM against a binary dump, but this i…
... />
Thus, I need a routine that calculates a unique value ... -
How to benchmark a single routine?I've written a routine. It works. But it was never meant to be the final version. So I rewrote it. The new routine works too. Yay. :) However, I'd …
I've written a routine. It works. But it was ... I rewrote it. The new routine works too. Yay. :)
Is there an SNA halt bug?Hello all, I noticed that some SNAs don't work on my emulator but they do work in almost everyone else's, SPUD fails with them too which is a tad sp…
... to get stuck on the halt instruction. I can't find ... with regard to SNA and halt, does anyone have the details ...Struggling with this routine... Any ideas?I'm trying to write a routine that plots 3 pixels to decrease the energy bar in the top right corner by 5 units, but it just wont have it! There mus…
... 'm trying to write a routine that plots 3 pixels to ... /> call $22E5 ;call ROM plot routine
pop bc
inc ...quick RAM copy using LET in BASICI'm in the process of reviewing, revising and refining all the programming tips & utility routines which I've posted on this forum over the last eigh…
... of free RAM). Although the routine will copy any length it ... TO 4096),"16384",2048): CLS : PAUSE 0:
GO SUB FN ... ("16384",S$( TO 6144),6144): PAUSE 0: STOP
[/code]
Sampling routineLooking for a simple yet crude sampling routine that I can use on a forthcoming game. I've tried most of the ones from the archive and find them uns…
... a simple yet crude sampling routine that I can use on ... spare and just need a routine that goes "YEAH!"
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…
... ()[/B] - execute a very small pause (technically it waits for the ... is just a simple routine called to pause at the end of ...Routine for Currah speechI'm currently writing a routine for the Currah that will provide speech during a game. A timer is set to initiate the speech every 50 cycles of the …
I'm currently writing a routine for the Currah that will ...Asm routine for AY playback?Hi, is possible to create and "name" an asm routine for playing some ay data? If yes, how? Example: Ok , I've finished a sound tracker song, now I n…
... create and "name" an asm routine for playing some ay data ... with or without the play routine? How does it work?
Is possible to call the routine and make it play some ...MOVE_M Object Movement Manager for BASICAs moving things around on the screen is usually the slowest part of a game written in BASIC, I've been pottering around with this routine to handle …
... the features.
The routine gets its instructions from three ... defb $20,$01 ;SPACE, Pause, $01*256=line 256
257 RESTORE USR DOINT: PAUSE 0: RESTORE USR NOINT: RETURN ... /> KEYX: defb $20,$01 ;SPACE, Pause, $01*256=line 256
What would be the simplest tape loading routine?I'm searching for some small assembly snippet I can use to load a (headerless or not) block from tape into RAM I can embed in my C games to load furt…
... I could use the ROM routine (It would suffice, any pointers ... I'm asking for a routine :)
No need for ...Troublesome routine, help needed!Having problems with this routine, it basically fires a rocket up the screen, but refuses to detect collisions. I'm using attribute blocks for detect…
Having problems with this routine, it basically fires a rocket ... tried allsorts to remedy this routine but nowt seems to work ... /> call print ;call the print routine
pop bc
djnz ...Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
... for a simple memory transfer routine that shifts 32 bytes of ...Game loopJust working on my first ever Spectrum game, and am struggling to work out what the game-loop should look like. I've got interrupts enabled (mode 2)…
... ):
loop: halt ; wait for interrupt to occur ... and then the draw_sprites routine clears them off (unless ... was thinking about the halt instruction I then ... br /> loop: update_stuff
halt
clear_sprites (from old position ...Questions about Vortex Tracker II exported songsHi, I have been experimenting with Vortex Tracker II lately and have a couple of questions. By exporting the song to TAP format, a file is generated…
... data. Then a small MC routine must be coded in order ...
EI
LOOP:
HALT
CALL 27810+5
Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…
... address bus during execution of HALT, beyond the initial M1 ... contains the following code for HALT:
[CODE] case ... the opcode fetch after a HALT could actually trigger paging ... of addresses well before the HALT operation finishes. While I ...ZX Alien Breed - WIPI'm sure a lot of you have seen the discussion in the New Game Ideas area about a Speccy version of the classic Amiga game Alien Breed. I've been dro…
... quicker!
2 - Key routine. This is really straightforward and ... expand it to allow a Pause feature in the game. However ... of the LDIR block-copy routine means I can shift individual ... alien data into the routine and use just the one ...Top Telly Tip... Halt and Catch FireThe series is set in the early 1980s and depicts a fictionalized insider's view of the personal computer revolution. The show's title refers to the f…
... the fictitious machine code instruction Halt and Catch Fire, which would ...LM ram block transfer routineHello! I need to transfer a block of 33000 bytes starting from address 28000 to a new start address, 31000, using a LM routine. Please, someone coul…
Hello!
I need to transfer a block of 33000 bytes starting from address 28000 to a new start address, 31000, using a LM routine.
Please, someone could help me?Block RoutineHi Folks, I want to draw a block on the screen dependent on providing the X,Y,W,H values. I came up with the following: [CODE]100 LET l$=" …
... : PRINT AT 0,0;"Block Routine"
160 GO SUB 200 ... STOP
180 REM Block Routine
190 REM x,y ... />
Anyone got a better routine?
Many thanks
Simple text scrolling routine...I'm having trouble writing a very simple text scroller, the idea is to use the ROM printer routine to print 32 characters each time the routine is ca…
... to use the ROM printer routine to print 32 characters each ... time the routine is called, updating the de ...Ensure my interrupt handler begins at the same T-stateHi! Is there a way to ensure that an IM 2 interrupt handler starts always at the same T-state (related to the moment the ULA triggers the INT line, w…
... far, I've made my routine to last a number of ... main loop is full of HALT instructions, with some instructions to ... of instructions that aren't HALT last a number of cycles ... get by now is my routine starting at cycle 19,20 ...Soundex routineIn an idle 5 minutes I wrote a short routine to calculate Soundex codes using the algorithm described here: [url]http://en.wikipedia.org/wiki/Sounde…
... minutes I wrote a short routine to calculate Soundex codes using ...+3DOS routine missing in the +3 manualThe other day I realised the details of the +3DOS DOS DELETE routine are missing in the [url="http://www.worldofspectrum.org/ZXSpectrum128+3Manual/ch…
... of the +3DOS DOS DELETE routine are missing in the [url ...Spectaculator - P for Pause!?I bought [b]Spectaculator[/b] yesterday, as the nephew is interested in playing Speccy games but can't get used to using the keyboard to control them…
... ]P[/b] key from being pause? I use the old QAOP ... default the p key as Pause seems like a massive mistake ...
