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A sped up pixel-shift routine for 1-byte–wide spritesHere’s an optimized (for speed) real-time sprite shifting routine for sprites that are one byte wide. It uses no memory variables for storage of inte…
... speed) real-time sprite shifting routine for sprites that are one ... sets again.
(The routine is shared between two sprites ... -
Interupt service routinehas anyone set up a interupt service routing with pasmo? this one I tried resets the speccy EDIt- I placed the code after the END directive, I fi…
... 65024
; pointers To interrupt routine.
defb 200
defb ... -
im looking for a horizontal scroll routinehi, im looking for a horizontal scroll routine. i read somewhere that you can do it with at 'to' statement, somewhere in a print routine. althoug…
... looking for a horizontal scroll routine. i read somewhere that you ... ' statement, somewhere in a print routine. although i am open to ... -
High score table routineI wrote this general purpose high score table routine. It stores 5 scores and displays them alongside the player names, which are 8 characters long. …
... general purpose high score table routine. It stores 5 scores and ... /> RET ; exits the routine
PRINTNUM: ; routine by J. Cauldwell
A Neat Redefine Keys RoutinePreviously, I’ve only shared this routine with a couple of people via PM, but I’ve now decided to make it public. I optimized it for size, so it uses…
... /> [code]
;Redefine Keys routine
;By Ast A. Moore ... call 8859 ;inside ROM routine BORDER ($2294)
call ...
;A crude debounce routine to prevent
;registering ... call $3b5 ;ROM beeper routine
pop ix ;restore ...A SAVE routine to reduce Microdrive loading timesHello! Please i'd like to know if there is a SAVE routine written to reduce the zx microdrives loading times.
Hello!
Please i'd like to know if there is a SAVE routine written to reduce the zx microdrives loading times.Machine code routine neededHello! Please i'm looking for a short routine that can write the same value in a range of continous memory locations. For example, to write 255 val…
Hello!
Please i'm looking for a short routine that can write the same value in a range of continous memory locations.
For example, to write 255 value from location 40000 to 41000.
Many thanks in advance.looking for a vertical scrolling routinein basic or like the standard scroll? routine but the other way round with the scroll? removed (this would have to be in code). ive tried a couple of…
... or like the standard scroll? routine but the other way round ...Restoring AY registersAfter doing (not still finished) the sna to tap converter, I'm going to try to do the same for 128k snapshots. I've got threee ideas about what to do…
... embedded) a machine code routine that does the following ... the screen with the routine that restores them. ... can be simultaneous. The routine placed at 16384 loads ... need to put a delay between selecting an AY ... there are an interesting routine at address 7805: an ...im looking for a machine code star-field routineim looking for a machine code star-field routine. preferably with mnemonics.
im looking for a machine code star-field routine. preferably with mnemonics.Passing parameter from BASIC to assembler routineWas there a "clean" way of passing parameter(s) from a BASIC program to an assembler routine? Something like parameterising RANDOMIZE USR call? I fac…
... BASIC program to an assembler routine? Something like parameterising RANDOMIZE USR ...why am i getting b integer out of range in this code?ive tried running this in spin but thats what i get [code]main org 40000; ; We want a black screen. ld a,71 ; white ink (7) on black paper (0…
... game.
call 3503 ; ROM routine - clears screen, opens chan 2 ... splayr ; show player.
halt ; delay.
; Jump back to beginning ... 's gunbase position,
; this routine is called prior to display ...this code wont give me a random starfieldim using a peice of code that ive copied from a book, ignore most of it as it is redundant. for some reason i get a strange random starfield instead …
... game.
call 3503 ; ROM routine - clears screen, opens chan 2 ... splayr ; show player.
halt ; delay.
; Jump back to beginning ... 's gunbase position,
; this routine is called prior to display ...WANTED: tape replacement for +2?Any tape replacement possible for a +2? My +2 works wonderfully but the incorporated datacorder is simply worn out and won't load ANYTHING. Dirty sig…
... as there is some delay when output bit 4 changes ... be always 255, if delay is longer then result ... high level duration, the delay is also much longer. ... The explanation for this delay is that there are capacitors ... and the ROM beep routine contains a OR 8 before ...On 48k, can I copy 4k before next screen updateFollowing on from my thread at [url="http://www.worldofspectrum.org/forums/viewtopic.php?topic=6423&forum=11"]http://www.worldofspectrum.org/forums/v…
... will have to delay the start of your copy routine after the ... this time, if your copy routine is still running, you will ...Cobra - scrollingHi everyone, I have been studying some of the code in Ocean' Cobra game using a debugger, in the hope of improving my own scrolling routines. In cas…
It's waiting for bit 7 of R to be set. Bit 7 can only be changed in software using LD R,A. Look in the interrupt service routine.
The delay must be measured in multiples of 20ms.Sprites flickeringI am trying to write a Spectrum game in machine code. I am still a beginner in programming, however I did much progress recently, i believe. Now I am…
... that point, by using a delay timed for the correct number ... then make sure your sprite routine has finished drawing the sprites ...Sprites flickeringI am trying to write a Spectrum game in machine code. I am still a beginner in programming, however I did much progress recently, i believe. Now I am…
... :22, Ralf wrote:
My routine is as follows
1 ... sprite into background
3. Delay loop
4. Draw stored ...divIDE issuesI discovered a few issues with the divIDE hardware and FATware software that may be of interest to some people. 1. ROM paging If your Spectrum is a…
... snapshots loading. The IM2 detection routine is mistakenly overwitten by the ... location). Without measuring the delay of ROM-routine execution time, no software ...New ZX Adventure Club Game - First Half of NovemberAnd starting today it's: Just in time for Hallowe'en :) [url="http://www.worldofspectrum.org/infoseek.cgi?regexp=^Scapeghost$&pub=^Level+9+Computin…
... 've to perform this distraction routine only when the program tells ... but I was unable to delay the gang till the critical ...New ZX Adventure Club Game - First Half of NovemberAnd starting today it's: Just in time for Hallowe'en :) [url="http://www.worldofspectrum.org/infoseek.cgi?regexp=^Scapeghost$&pub=^Level+9+Computin…
... 've to perform this distraction routine only when the program tells ... but I was unable to delay the gang till the critical ...Homing missile routine - help neededI am attempting to write a routine which will allow a missile to home in on a player. Basically the sort of thing you see in most shoot-em-up games. …
... /> I coded a homing missile routine some time ago for a ... target (as a warm-up delay)
-Draw some animation ...How to speed up TZX loading (emu development)With many newer emulators there are options to do faster loading schemes, even for turbo-loader or protected loader blocks in TZX files. For example,…
... in quick succession. The routine would then scan forward to ... a short delay loop before the edge detection routine. This means ... it was before because the delay loop gets emulated normally.< ... recognition thing for the whole routine. The general idea being ...How to speed up TZX loading (emu development)With many newer emulators there are options to do faster loading schemes, even for turbo-loader or protected loader blocks in TZX files. For example,…
... them, along with their initial delay loops.
If there's ... have a generic loader detecting routine (also based on B being ...Delay routine requiredI'm putting together a short routine to play some Beep style music. I need to be able to pause between notes when required. These pauses are defined …
... 'm putting together a short routine to play some Beep style ... milliseconds. I'm after a routine that will allow me to ... jump back will cause the delay.
