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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…
[QUOTE=joefish;746108]What do you mean, count the T-states? Are you mad? Have you nothing better to do? :lol:[/QUOTE]
It's just a strange habit I acquired in recent years :) -
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…
... 448 T-states. Also it has a "tolerance" of about 35 T-states ... executing a NOP instruction (4 T-states) for instance, you will ... a maximum delay of 3 T-states (if the computer has ... instructions take more than 20 T-states, thus causing longer interrupt delays ... -
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…
... 448 T-states. Also it has a "tolerance" of about 35 T-states ... executing a NOP instruction (4 T-states) for instance, you will ... a maximum delay of 3 T-states (if the computer has ... instructions take more than 20 T-states, thus causing longer interrupt delays ... -
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…
... game will have about 15K T-states available per frame, so
border), your game won't need to spend time with ... will save about 1.8K T-states. For instance, reducing 4
T-states available per frame. -
Music from a Speccy game identificationI've found some old C90 recordings of Speccy game music I made about 25 years ago. I've been able to identify most of them, but not this one... [url…
... (not Wham! edition, but the 48k/128k edition)
[url]http ... 'm fairly sure there isn't a 48K version other than the ... -
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…
... will tell you how many t-states are used by that code ... -
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…
... will tell you how many t-states are used by that code ... those sound good. Showing the t-states for a block of code ... -
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…
... the attributes every t-state (one byte per t-state, interleaved, i ... an attr byte per 4 t-states, i.e. the full information ... -
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…
... indeed. What I don't get though is the reason ... sure they simply didn't use versions of the ... the attributes every t-state (one byte per t-state, interleaved, ... an attr byte per 4 t-states, i.e. the full ... .org/forums/showthread.php?t=41048&p=659785"] ... -
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…
... routine runs a tight 8 t-states circle inc a:jp ... to take exactly 4n-1 t-states per frame, so that ... , these sequences just won't be generated; my alignment ... most of them didn't get the Pentagon emulation ... instruction cycle at the specified T cycle after ULA (or ... -
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…
... , 2MHz means you have less t-states for a given discretisation frequency ... . You won't be able to synthesize quite ... a PDM sample, you won't have any problems at all ... -
48k AudioI'm at the point in my game where I could use a few beeps and bloops. Ive been looking at loads of different speccy books, but this whole business of…
... off, what most people don't realise it that there's ... certain pitch. If you don't mind the sound being screechy ... />
Now if you don't mind just having some noise ... the screen display, 250-500 T-states (320-640?s) long. At ... -
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 ... new value roughly every 31 T-States.
The sample is ... for the PDM isn't perfect to the T-State, but then ... -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
It's always worth remembering that JP (HL) takes only 4 t-states to run, where as the usual JP nn takes 10. It's therefore very useful for coding jump tables where a succession of CP n/JP nn would take far longer to process. -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
... JP (HL) takes only 4 t-states to run, where as the ... for different addresses. And don't forget that any JP (HL ... -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
... jp nnnn pairs takes 17 t-states to run, so by ... you've spent nearly 100 t-states.
(I appreciate that ... , the process takes 42 t-states, performs the same task ... different addresses. And don't forget that any JP ( ... ZX81, and so doesn't directly apply to the ... -
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…
... folder.
This shouldn't crash, but there will be ... assembly instructions
[MAYBE] - Show t-states for selected block
[MASSIVE ... -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
... thread, the process takes 42 t-states, performs the same task as ... this will execute in 32 T states, approx. 25% faster. If you ... be even executed in 28 T states while directly using LD L ... the ZX81, and so doesn't directly apply to the majority ... -
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…
... serial communication but I can't bit bang in emulator and ... thing' it seems you won't be using an IF1 for ... Fuse's serial emulation isn't strictly dependent on the IF1 ... line a fixed number of t-states after the start bit, and ... -
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…
... it seems you won't be using an IF1 ... 's serial emulation isn't strictly dependent on the ... line a fixed number of t-states after the start bit, ... there are cca. 29.36 t-states per bit which is sufficient ... bauds requires almost no wait states - perhaps two nop ... -
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…
I don't know the answer you want, ... [/FONT] [FONT=sans-serif]four T states. The CPU will sample the ... -
LDI questionWhen using LDI (or LDD) is it possible to access the value that is transfered from (HL) to (DE), or does the Z80 use an internal data cache to store …
... and CPI both take 16 T-states as the CPI instruction isn ... 't having to perform a write ... -
LDI questionWhen using LDI (or LDD) is it possible to access the value that is transfered from (HL) to (DE), or does the Z80 use an internal data cache to store …
... and CPI both take 16 T-states as the CPI instruction isn ... 't having to perform a write ... M cycles if they don't repeat, so the fifth M ... -
New bicolour game coming very soon.And they say budget software houses can't afford to advertise :-D [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/elstompo_advertsmall_…
... 448 T-states. Also it has a "tolerance" of about 35 T-states ... executing a NOP instruction (4 T-states) for instance, you will ... a maximum delay of 3 T-states (if the computer has ... instructions take more than 20 T-states, thus causing longer interrupt delays ... -
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…
... />
Actually no, there isn't.
[QUOTE=R-Tape ... , in order to save enough 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…
... the right number of T-states on both platforms! On ... , and use the extra T-states to do something interesting! ... /> Of course, this doesn't really do justice to the ... are, partly 'cos I can't draw! :-)
... as this thread isn't really about the engine... ... -
5C series NTSC ULA 5C114E 8248Not sure if this has been mentioned before; I haven't seen anything about it online. Chris Smith's book discusses 6C011E as the NTSC ULA sold in Spec…
... ). Assuming this ULA uses 224 t-states per line and 264 lines ... -
SBC IX,DE/BCAlways wondered why there wasn't a SBC IX, DE/BC command.... so have to use PUSH HL ; save original HL PUSH IX ; IX on stack POP HL ; IX …
Though if you don't care about the contents of HL initially, then use POP HL/PUSH HL instead of the EX (SP), HL as it saves 17 t-states! -
what games have the best in game music?Just strikes me that many games I love don't have in game music, r type and chase HQ both have effective sound effects but no tunes. On the other ha…
can't compare AY and beeper, I mean programming wise to include it into a game timing wise is far trickier with a beeper.. sure there are examples of it , but decent things take up to much raster time.. err t-states ?!?! -
Space Harrier new loading screenHi, The original screen: [IMG]https://dl.dropboxusercontent.com/u/2616449/spectrum/SpaceHarrier.png[/IMG] and my new version: [IMG]https://dl.dro…
[QUOTE=zub;763634]Wow, hadn't realised this — it seems Elite ... started selling it in the States! :o
Even the ... the expense of raster time (t-states?) so you have that trade ...
