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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 ...
ld a,(hl) ;read screen into A
xor ... -
"ZX80 Brain" RPN CalculatorIt is at times like [url=https://www.worldofspectrum.org/forums/discussion/54176/depression]when threads such as this are posted[/url] that I get the…
... found it on an old tape I'd kept and didn ... already written a screen-drawing routine for a "ZX81 Brain" version ... are unused, but I'd read the keypress with LET i ... package contains the program in tape, +3 disc and microdrive formats ... -
Understanding tape edgesI've never done any tape reading code. But I've read about these "edges" on multiple occasions. Trouble is I don't understand what they heck they are…
... never done any tape reading code. But I've read about these ... ) to EAR and try to read it ... what will I get ... -
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 can ... ' statement, somewhere in a print routine. although i am open to ... -
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 ... br /> ld a,(23693) ;read current attributes
and 248 ... -
The R-Tape loading Era. An Easter story?R-Tape loading era Nostalgia's a funny thing you know. You might remember what at the time seemed a damn nuisance, only to recall it much later…
... an era when cassette tape loading and saving of ... cure for the dreaded R-Tape loading error.
tape recorder back and forth ... played havoc on the tape heads, hence the need ... 'm always surprised to read of other people having ... -
Random-Access to Microdrive FileI am working on a BASIC program to backup a microdrive text-file to standard tape array-file. To backup a text-file from one microdrive to a secon…
... is the ability to "random read access" an OPEN# microdrive stream ... is simply the SAVE to tape routine.
The following ... effectively does a [b]random read[/b] of 512 characters ... sector.
Each sector read is precisely placed inside B ... -
Unknown Hardware tape copier?Back in the mid 80's A friend bought a hardware tape copier (similar idea to a multiface, except all it did was re-dump memory after pressing a butto…
... A friend bought a hardware tape copier (similar idea to a ... code there for the reload routine)
Basically it was ... it (green button=snapshot to tape, Black button=reset the machine ... -
ZX Spectrum +2A - problems loading from tapeI recently acquired a ZX Spectrum +2A, now the only item in my collection to be found is a [b]+2B[/b], and I got all from the MK14 to the PC200 ;-) …
... few known working games from tape, but without luck. Both a ... improvement?[/b]
I read about dry solder joints for ... +2B: I think I once read that you could only see ... -
ZEsarUX 8.1 stableHi! I've uploaded a new ZEsarUX 8.1 stable version. Go to the github released webpage to download it: https://github.com/chernandezba/zesaru…
... -debug CPU window: show interrupt routine pointer on im2 mode
Improved real tape loading: acceleration is disabled ... a window menu, it will read that window again
... RTC emulation
-fixed autoload tape
Fixed Accessibility ... -
Putting downloaded Speccy games and music to tape, does it still work?Thought to ask first, before wasting hours of my time for nothing. I have read from somewhere that modern Windows players will spoil the wav so it wi…
... time for nothing. I have read from somewhere that modern Windows ... put downloaded Speccy games to tape, but that was long time ... and beeper/AY files to tape to listen them through TV ... -
Fantasic Voyage hack (read your own risk)Please read this hack only your own risk, THIS CAN DISTURB YOUR CALM! [code] 10 CLEAR 30719 20 LOAD "VOYAGE" CODE 30 POKE 60537,42: POKE 60538,10…
Please read this hack only your own ... FOR F=44802 TO 44865: READ A: POKE F,A: NEXT ... and press play on tape with original tape.
The game ... -
The ZX Spectrum 40th Birthday Game Mix Tape(I have done a search and could not find a thread on this, apologies if one does exist somewhere. The below text is from the person who put this toge…
... -spectrum-40th-birthday-game-mix-tape
Happy Birthday, beloved ... videogames.
You can read about some of the amazing ... -
The funniest thing we made with the spectrumHello. The funniest thing i made with the spectrum were championships with my buddy francisco on a game called 3d stunt car racer, i think that was t…
... of levels - for multiload games, tape counter positions, 1-to-5 ... with the interrupts and i read in some book about error ... , move the relocatable error-trapping routine and started it. After that ... itselt (NEW). This new interrupt routine was still calling the old ... -
Interrupts details questionSuppose I am writing a game and I want to use interrupts to measure time, draw the screen without flicker, maybe to poll keyboard etc. What kinds of …
... cares about keyboard, sound, tape and video) generates a signal ... enabled, processor jumps to interrupt routine (TIME: 0)
in ... left/right border) ULA try read memory page (16384-32767}. ... that means write to memory, read memory or just execute instruction ... -
Emulation Feedback** Extended RTM sessions could over-tax the CPU.
...
A: 'and real tape mode is just a realtime ... />
The Real Tape mode does exactly the same ... different. In real tape mode, the same routine handles the incoming ... . You just neglected to read that part, didn't ... is stopped in real tape mode? Just don't ... -
Games that crash because of contended memory.I find these are really annoying. You load up a game like Astro Marine Corps, Fantasy World Dizzy, Dizzy: Prince Of The Yolkfolk and so on (the init…
... that it overwrites the tape loading error routine, so don't have ... and cause the interrupt to read from 0x03?? instead).
+3 disc imaging (idea + SDP)Following a bit of research, which you can probably see in the "old code" thread, I had an idea for a bit of software that may be useful (for me, and…
... +3 end were to just read every byte from start to ... (see above), a small MC routine could be written to be ... would just be written to tape (a standard SAVE "name" CODE ... several addon systems that emulate tape.+3 disc imaging (idea + SDP)Following a bit of research, which you can probably see in the "old code" thread, I had an idea for a bit of software that may be useful (for me, and…
... by calling the +3DOS read track routine, dumps the track contents ... which is then saved to tape), and loops around until ... (the RESTORE disk from tape option) simply does a ... WRITE track instead after tape data is loaded into ... won't save to tape easily. I know it ...Loading schemes18 years ago I hated loading schemes like Alcatraz and Speedlock because they were a b*tch to copy and became unreliable when the tape got older. Now…
... keep going back to the tape to load edges).
read tape edges in a way no ... the counter but yeah, the routine itself was as small as ... I used as little physical tape as possible, however it spawns ...ANN: SP1 for Z88DK (aka splib3, Sprite Pack v3.0)Well it's finally arrived, after a month of "a few days from now" release deadlines. SP1 is the lastest version of splib, a flicker-free software sp…
... the currently executing program to tape or disk. For backups, ... address 0x38 does things like read the keyboard and update the ... /> [*] The Basic system's interrupt routine at 0x38 takes at least ... provided, the z80 will always read a subroutine address of byte ...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…
... real musician so can´t read the notes which makes things ... you are doing. I'd read Gasman's intro to Soundtracker ... topic. Vortextracker will export a tape image with player and/or ... does not include the interrupt routine that must call the player ...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…
... on ZXF, but didnt read yet. I?ll do ... . Vortextracker will export a tape image with player and/or ... does not include the interrupt routine that must call the ... . What is this interrupt routine to load the songs? ... shot! I got the tape version and will try on ...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…
... ROM that has a callable routine at those locations, then Filer ... on the tape are CODE files, and can be read into memory ... using the standard ROM SAVE routine, rather than turbo data, then ... examined this small machine code routine. It calls the 128K paging ...Rom dumping a Mirage MicrodriverI need to dump the rom of my Mirage Microdriver for Zub and don't know what to do...any help?
... ROM, though, to call the tape routines, and the Spectrum's ... ]Incidentally, if you try to read from a non-existent memory ... happening in the START/NEW routine ($11CB), well, I just don ...Probing the variables in 128K modeHello again! Briefly, I'm writing an m/c routine to read some BASIC variables. So, before I start, I try to get an idea for the structure of how var…
... is a very useful generic routine.
I ... "RST $10" print routine to print to screen works ... br /> I made the pagination routine in BASIC yesterday, but it ... slower than they could be read.
Until ... every word in the tape magazine to avoid words ...Emulators on the ZX SpectrumHaving released a Spectrum 16K emulator for Spectrum 48/128 machines as part of CCG2008, I was wondering if anybody knows of any emulators which actu…
... describe how my instruction fetch routine works, but I've given ... opcode fetches, one for memory read and one for memory write ... uses the 6850 ACIA for tape/serial I/O. But it ...48K games that don't work on a +2Not sure if there is already a thread about this but recently I've noticed some old 48K games will not run on my +2 - even in 48K mode. Examples are…
... particular they modified the IM1 routine, key-scan and INKEY$ ... ports. Some games seem to read or write to random I ... are software identical though). Any routine that calls a specific address ... the 128 Spectrum has the tape tester routines.
11 ...Any 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…
... was the only fill routine on the BBC B ... OSWRCH (write) and OSRDCH (read). When the BBC wants ... inputted it calls OSWORD routine 0. I just trap ... and use the native Sinclair tape / microdrive routines. Even ... write a correct OSWRCH routine. It is complicated as ...A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…
Here's my routine which draws a random starfield ( ... in the current CSSCGC 2008 tape magazine to draw the starfield ...
LD A,(HL) ; read star byte into a
