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Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…
... . If you impose that in every UDG character at least one ... byte and at least 2 T-states on every UDG. Are these restrictions ... byte, or enough characters in every set of 9 to fit ... they appear. But neither is an ideal solution for graphics.
Buzzer sounds tips'n'tricksSo I have an ARM Cortex M3 with a buzzer connected to its GPIO pin. And because I read this forum I know that there is no need to add a separate buzz…
... are usually not enough, so generate a 16-bit value
t-states.
[CODE]
... here, which needs as many t-states
;to execute as ... ch1 and ch2 quickly, about every 20 ms or so.
20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…
... ensure this code always takes an exact number of cycles, regardless ... done in less than 5K T-states, I'm sure it would ... /> [QUOTE=gasman;712065](which means writing the leftmost byte as soon ... )[/QUOTE]
There's an approach I had in mind ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... /> In the ideal environment of an emulator and TZX file, the virtual ... zero pulses are exactly 512 T-states long, and my one ... pulses, and they don't end up being exactly 512T ... in absolute terms (notwithstanding the T-states required for changing the border ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... any platform, and could generate three versions of a ... ://sourceforge.net/p/fuse-emulator/code/5031/tree/trunk ... , with a resolution of 26 T-states:
[CODE]
... ]
I don't think you can go faster ... gets you down to 22 T-states, but eats memory. ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... 's pleasing that an expert has taken an interest in what ... of-an-envelope-quality calculation based on the number of T-states ... dislike that it requires both an AND and a CP ... has accounted for every single T-state required by every single instruction executed ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... reduce the number of T-states consumed by the inner ... BREAK/SPACE bit on every pass around the loop; ... the port number on every pass around the loop. ... is the inner loop 18 T-states quicker, it eliminates the ... account. On both my emulator and real Spectrum, the ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... contention come into play when writing into the video RAM? If ... if timings weren't already tricky enough when writing loaders![/QUOTE]
an extra delay of 0-7 T-states for each read ... or write. If you're just writing ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... rather... manual. I don't have a single executable ... use 47loader inevitably involves writing code; I'm thinking ... they are so specialized for an individual program.
T-states; and "set_searching_border", "set_pilot_border" and ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... the program would need to generate an assembly language file.
< ... of my day job involves writing C# code that generates ... non-trivial SQL queries, so writing C# code that generates ... assembly language isn't much different).
...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... =balford;734163]You know, with an extra couple of bytes for ... 'd need to leave enough T-states to update a counter, but ... hex.
It wouldn't be as elegant as, say ... now got me actually considering writing this, but I might not ..."Press any key" detectionWhat would be the simplest way to detect if *any* key is being pressed? No LAST_K trickery, I can't rely on that. It has to be reading the keyboard p…
... is larger to count exact T states. The only difference is if ... use in_WaitForNoKey so that doesn't apply here :) Staying within ... code). in_LookupKey() (to generate a scan code from an ascii code) uses ... CAPS or SYM shift won't count as keypresses and in_Inkey ...SWIV digitised speech as easter egg?I read in the permission from one of the authors of the game that the game had a "easter egg" with a speech from Aliens. I have never tried it myself…
... /8000 of a second, or every 437 T states. 1K of memory (1024 ... fully relaxed and approximating an analogue signal as an up or down ...IF1bis vs SpectranetSince I will shortly have access to both an IF1bis (which I've bought) and a Spectranet (thanks to a loan from cmonkey), I will be in a position to g…
... using a trivial number of T-states.
[/QUOTE]
an IDE device. Porting the ... a device that accesses an SD card directly, like ... to be read by an IDE device must always ... the last sector of every frame must still be ...Why are multicolour engines only able to be made now?Now I'm no programmer, but, how come multicolour engines are only being created/designed now? I know there were Rainbow Graphics used in games in the…
... NIRVANA FAQ that I'm writing:
[CODE]* HOW MUCH ... game will have about 15K T-states available per frame, so
every frame (during the top
T-states. For instance, reducing 4
FUSE on OSXHello peeps, Long time no speak! I am trying to set up some emulators on my MacMini (launched via XBMC), and of course, Speccy emulation is a mus…
... fine, but can't play them back. Every one I try to ... [/img]
I have tried every combination of RZX preferences to ... "breaking" playback, but it didn't matter what was on/off ... fine[/i]), except it doesn't generate an error when I try to ...Retro Game Comparison Blog.So, here's a shameless plug for my blog, which should interest some of you. Then again, it's not biased towards any particular system, so it might no…
... are all basically biased in every expression of ourselves. As for ... , when you must deal every day with dozens of teenagers ... a few machines doesn't equal to an impressive amount of experience ... hardware, I would not be writing anything.
[QUOTE= ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... from the attributes every t-state (one byte per t-state, interleaved, i ... one read of an attr byte per 4 t-states, i.e. the ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... 's an interesting thread indeed. What I don't get ... sure they simply didn't use versions of the ... from the attributes every t-state (one byte per t-state, interleaved, ... one read of an attr byte per 4 t-states, i.e. ... .org/forums/showthread.php?t=41048&p=659785 ...Help with 1-bit sampled soundHi all, I've been sent over this way from the CPC Wiki forums as you guys may be able to help me more specifically with a programming query. Firstly…
... first draft and I haven't tried to compile anything yet ... , there's around 8-10 T-states of operation in part-prepping ... with a new value roughly every 31 T-States.
The sample ... bytes, most are zero, but an increasing number of them are ...How did you learn to code on the Spectrum?Got to be honest, as much as I wish I did, I don't know anything about programming. I had a Spectrum (+2 and then +2B) when I was a kid, and my prog…
... then I was already writing bits of BASIC but ... the Z80, and recently writing a utility to compress and ... a thread pointing someone to an "easy" guide called ... />
I'm sure every introduction to machine code will ... you don't.
I think an awful lot ...Z80 Asm EditorHi, I think this goes in here but if not then the mods can move it.... :) I have been knocking up a multi-tabbed, customizable docking editor for w…
... At the moment it is an easy way to keep all ... .
This shouldn't crash, but there will be ... /> Snippet Editor
Control of emulator
FEATURE REQUESTS:
[ ... instructions
[MAYBE] - Show t-states for selected block
[MASSIVE ...New bicolour game: El Stompo.Phew! Finally finished my first game using Einar's fantastic Nirvana engine. [B]El Stompo.[/B] [IMG]http://i1142.photobucket.com/albums/n608/davey…
... for Buzzsaw+, by issuing an OUT command every time.[/QUOTE]
Actually no, there isn't.
T-states per row for sound.New bicolour game: El Stompo.Phew! Finally finished my first game using Einar's fantastic Nirvana engine. [B]El Stompo.[/B] [IMG]http://i1142.photobucket.com/albums/n608/davey…
... , hats off, this is an excellent game!
T-states on both platforms! ... an interrupt on the last scan-line, and use the extra T-states ... the games would still be every bit as great, even ... much every game using the engine would make an ...A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... waste the right number of T-states on both platforms! On the ... an interrupt on the last scan-line, and use the extra T-states ... ! ? the games would still be every bit as great, even if ... pretty much every game using the engine would make an excellent Mode ...ZX-Modules app reportZX-Modules app report If You are interested, I want to report about the state and progress about my ZX-Modules programs. I would like to report at l…
... meant the total amount of T-States while running the machine code ... s impossible to calculate the T-States of a code or ... C,DIS has two different T-States depending on the result ... time, a T-State calculation is possible. That needs an emulator implementation in ...FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
... t-states
dec a ; 4 t-states
nop ; 4 t-states
nop ; 4 t-states ... | 6 t-states
;; tell sender to stop sending (every time you ... I'll need to create an IP server which will communicate ...ESXDOS 0.8.5 and .Z80 on +2B or +3Last week I received some .Z80 snapshot files from a DivMMC EnJOY! user to test. These files didn't work on his ZX Spectrum +2B. [URL="http://benophe…
... zxspin and they still don't work for me on my ... save them as +2A in an emulator? Every time I open them they ... real +2B they won't work on an emulated one either. What ... you need is a +2A emulator ...ZX-Modules app reportZX-Modules app report If You are interested, I want to report about the state and progress about my ZX-Modules programs. I would like to report at l…
... ;-)
a djnz can be an almost endless loop eg[/QUOTE ... the t-states in such cases - except if I implement a real emulator. An emulator ... can calculate t-states easily.
Besides ...
