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Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... routines work this way: for every sprite, I have a ... as follows:
For every sprite from 1 to N ...
Next
For every sprite from N to 1 ... sprite on screen, keeping an off-screen buffer of its ... is that looking at the T-States and memory involved might ... -
Loading the display with data from memoryTrying to load part of the screen(4k's worth) with data from memory location 53000, I've written this routine, but it doesnt work... [I]ld b,4000 ld…
... 128 steps' loop incluiding an unrolled list of 32 ... ]
Yes. Because an LDIR takes longer than LDI ... the shorter time of 16 T-states.
You' ... , but usually it isn't, because it requires a ... to run faster. Optimising every single command, even if ... -
Faster CLS...Hi Folks, Looking at the CLS command in the Spectrum ROM disassembly it seems rather complex. Does anyone know of a simpler/quicker routine that wi…
... or something? How can an LDIR at 21 T-states (plus contention, so ... in less than 100,000 T-states?[/QUOTE]
It sounds ... debugger shows the number of t-states since you were last in ... something I miss in Spectrum emulator debuggers -- maybe something to ... -
Faster CLS...Hi Folks, Looking at the CLS command in the Spectrum ROM disassembly it seems rather complex. Does anyone know of a simpler/quicker routine that wi…
... if you have never used an assembler, because the concept of ... people worry about how many t-states or raster lines it takes ... is a "feature" of that emulator. I was hoping by having ... -
A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... engine will be waiting in an idle loop until it ... that must execute taking an exact number of T-states every time regardless of ... thus hopefully the programmer won't feel compelled to even try ... second at exactly 69888 T-state intervals every time (even more exact ... -
A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... that must execute taking an exact number of T-states every time regardless of ... routine, when precise timing doesn't matter. -
A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... distinguish between both cases and generate specific code for each ... on my experience from implementing an optimized C compiler decades ... original code executes in 164 T-states (not considering the execution ... new code executes in 118 T-states, thus it's almost ... -
LZ77 en/decodingI've written an LZ77 en/decoding routine as I couldn't find one around for the Spectrum. Initially I'm just doing it in BASIC to get the logic right.…
... in an arbitrary order and having to search from the start every ... time when adding an entry or scanning ... used one so I haven't got very far with the ... version of a routine to generate a 256 entry hash table ... -
28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... by 8 pixels you couldn't move the attributes to ... .
As for an editor, it would need to ... byte instructions, which take 4 T-states longer (or 8 if ... a NOP in front of every other PUSH so that ... could just as easily have an EXX.
But ... -
28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... .
As for an editor, it would need to ... byte instructions, which take 4 T-states longer (or 8 if ... a NOP in front of every other PUSH so that ... could just as easily have an EXX.
But ... />
(btw I wasn't thinking of loading new values ... -
Z80 emulation C source with a permissive license?Could anyone recommend a good (all opcodes, proper timings) Z80 emulation code in C with a simple permissive non-viral license? Something without a w…
... credit for anything you haven't done yourself.
... right), although I don't know how legally correct it ... do ever get around to writing my dream first person shooter ... oblivion that swallows up every actress who played an assistant (apart from ... -
Z80 emulation C source with a permissive license?Could anyone recommend a good (all opcodes, proper timings) Z80 emulation code in C with a simple permissive non-viral license? Something without a w…
... worked in games that didn't disable the interrupts, so it ... with them', as I didn't care (no one was likely ... do ever get around to writing my dream first person shooter ... oblivion that swallows up every actress who played an assistant (apart from ... -
Incorrect Spectrum +3 emulation: different results on Fuse and SpecEmuWhen developing and testing [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027591"]Rotatrix[/URL], I noticed different results on Fuse and S…
... may be relevant for any emulator developers interested in investigating this ... with a 3 T-states delay in comparison to an "early timing" Spectrum ... this real behavior (when the emulator is configured as "late timing ... -
ESXDOS v0.8.0 released (with NMI Browser)Hello, To celebrate the speccy's 30th birthday, here's the latest version of ESXDOS for DivIDE users. The full changelog is too long to post here, s…
... zx/divideo-esxdos.hdf.zip]an example .hdf image[/url ... from memory is about few T states (~6 reads from memory ... ). but esxdos don't have syscall to get ... ) but unfortunately it doesn't work out: the routine ... the 'busy' flag after every data packet) so there ... -
Question about 2-channel beeper musicI confess I haven't tried all the available beeper utilities and software. I always found music software confusing and trackers are not for me. I kno…
... chart of Z80 instruction T-states to hand as every T-state is critical ... playback 2-bit samples at an effective sample rate of 19 ... final version cycled the beeper every 84 T-states (12 low, 24 mid ... fastest of 77 T-states (11+22+44) -- 11 T-states being the ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... of [URL="https://fuse-emulator.svn.sourceforge.net/svnroot/fuse ... -emulator/trunk/fusetest"]fusetest[/URL] ( ... (thus it will be 4 T-states further than marked in the ... of these positions running on an emulator in Spectrum 48K mode.[/I ... -
ISO-Copy - Individual Software revisitedHi folks In another thread about Supertape: [url]http://www.worldofspectrum.org/forums/showthread.php?t=36203[/url] ... we touched on ISO-Copy by th…
... determine the real number of T-states per pulse.
With 44 ... roughly 79t, so we can't be sure if
a ... .
192Khz would give us an accuracy of 18t, but a ... instructions sample the tape. Z80 emulator (for example) has the OUT ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... a complete cycle every 65536 counts. With an initial frequency of ... specific board, as I don't remember hearing the keyboard " ... you don't change the configuration rate option for the "Generate Programming ...
The CCLK routing doesn't seem to have a negative ... -
New Game! Maritrini, Freelance Monster Slayer in... (etcetera)We have just completed and released a new game! A prequel for Maritrini Freelance Monster Slayer: [B]Maritrini, Freelance Monster Slayer en ?Las inc…
... QUOTE=LCD;656328]LOL. SPIN Emulator works here fine with Windows ... .cfg file or whatever...didn't work, tried deleting SPIN and ... didn't work. Tried an older version of SPIN....same error every time ... ?
I don't really want ... -
Gameboy advance Speccy emulation?I have heard , but can not find clear / understandable info on emulating the spectrum on a Gameboy Advance... but it is apparently possible? Using '…
...
That was KGB Spectrum emulator and it ran like a ... ... Peter McGavin's Spectrum emulator was a far more noble ... is performed on an emulated system, alas why an emulator needs a ... T states and CPU timings generally vary depending how accurate the emulator ... -
Fantasy Z80 instructions?This follows on from something catmeows said in another thread, and that I've been meaning to ask for a while. This may sound daft to people with mo…
... system by making pretty much every instruction *much* slower (since it ... [U][B]MIND-BOGGING 19 T STATES[/B][/U] for starters. I ... actually called INDEX registers, shouldn't they be like *gasp* [ ... to compiler writers who wanted an easy way of handling parameters ... -
Code execution logging/profilingAs revealed in [url="http://www.worldofspectrum.org/forums/showthread.php?t=41666"]this thread[/url], I'm adding support for reading code execution l…
... what would you like an emulator to produce for maximum ...
I would suggest using an existing output format used by ...
[#] [Address] [Bytes 1..6] [t-states] [opcode/operand]
The ... to implement.
Maybe T-States since interrupt might be ... -
Ay Real Time Synthetizer SoftwareSpectlemen and Spectladies!It's been a long time that I'd like to ask this.... I ask thee to create a new musical software for our ZX Spectrum machi…
... depend on external interfaces. And every one of those requires different ... and I don't think anyone should be writing code for any ... reading and research today in an attempt to understand the possibilities ... show up, don't give us an opportunity to ask questions ... -
Ay Real Time Synthetizer SoftwareSpectlemen and Spectladies!It's been a long time that I'd like to ask this.... I ask thee to create a new musical software for our ZX Spectrum machi…
... I don't think anyone should be writing code for ... sinclair one), there isn't any for input, right?
t any for input standard. ... input, it's just an extension of the PLAY command ... there will be very little T-states left (about 100) between ... -
Summary care recordsWhat on earth is this rubbish through our door? Opt out schemes are awful. I think I'll send them one of my own. [I]Dear NHS, You will buy x1 Sp…
... Constables uphold lawful law. An officer is a corporate rank ... a constable. Don't ask for an officer, or ever ... address a constable as an Officer. They're 180 ... most of them don't know it. Every Police man/woman, ... of all the banking states all over the world. ... -
ZX7: an "optimal" LZ77 packerAbout 20 years ago, I started a M.Sc. in Computing, planning to work on data compression. Although I quickly changed to another subject for a number …
... comparison measured using ticks (in T-states):
[CODE]
|Standard| Turbo ... the adventure thing i'm writing.[/QUOTE]
Cool! Are ... your "gacomp" project or into an specific adventure game?
Video generation using a CPUWe know it is possible to generate a video signal using a CPU, and this technique was often used on low-end computers in the early 1980's (for exampl…
... start of each display line, an interrupt is generated by the ... output bit by bit via an internal shift register during the ... it does nothing for four t-states (except generating that crucial refresh ... both; that didn't stop people from writing games for it that ...TKMEM - the 128K interface for 16K SpectrumsHello all! Here in Brazil, we have made a small production of an interface, totally based on Velesoft?s memory expansion ([url]http://velesoft.speccy…
... timings, scanlines are 228 T-states long, and the frame ... -to-interrupt) is 59736 T-states long, meaning there must be ... any emulator authors would be interested in providing an accurate ... [*] The behaviour of IN from an unattached port ('floating bus').
TommyGun with AGDHi everyone, I have been working with Jonathan to incorporate his excellent Arcade Game Designer utility into TommyGun. Jonathan has created a compi…
... can't find code editor for writing scripts. Finally I cannot see an ... option to compile the game to run it in an emulator.Emulator audio...how?Hi all. I am in the process of writing a Spectrum emulator (c#) for my final year project at university. I've got it all working, apart from sound. …
... on from Karingal, is that every time bit 4 changes, (ignore ... and fill your buffer accordingly. Every 50th second or so (the ... I wouldn't suggest monitoring the state every few t-states as this could ... be heavy work and may not provide an ...
