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Assembly code auto optimiserFor my Finders Keepers Plus project I'm considering writing an Assembly code auto optimiser. Way back when I wrote the original FK I considered optim…
... take 10 T-states, whereas a JR (unconditional) takes 12 T-states, and conditional ... 7 (if condition is false) T-states.
This can be ... (HL) [4 T-states], JP (IX), JP (IY) [8 T-states] and finally DJNZ ... -
Assembly code auto optimiserFor my Finders Keepers Plus project I'm considering writing an Assembly code auto optimiser. Way back when I wrote the original FK I considered optim…
Well you should be looking for a profiler at least... Surely emulators should know how many T states each instruction takes and it would be easy for them to track it. -
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…
... coding you don't need all that many T-states to do it ... -
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…
... of the LDI intruction (16 T states per byte),
- but ... the sense that it doesn't need to be known in ... -
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…
... the sense that it doesn't need to be known in ... trivial number of T-states.
I don't think Gasman's ... -
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]
The ... />
[QUOTE]I don't think Gasman's video player ... hand, the last sector doesn?t need to be read to ... -
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…
... takes exactly [B]14100[/B] T-states.
If you want ... take exactly [B]14100[/B] T-states also, before it reaches address ... -
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…
What do you mean, count the T-states? Are you mad? Have you nothing better to do? :lol: -
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 :) -
ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…
... 1-TState accuracy. I don't know if Woody improved the ... i,a which is 9 T-states? -
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. -
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 ... -
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 ...
