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The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…
... , min, and average number of T-States it takes to pass through ... -
Codies help? Werewolves of LondonHi All, never one for shying away from the deep end, having only just dipped my toe in to the world of machine code I find myself trying to find out …
... ]
What you haven't noticed is that an interrupt ... - it's at 69886/69888 T states as you can see from ... overflow maybe? The code doesn't make much sense at that ... -
Assistance with IM2 routineI subsequently got a working IM2 routine.
... the table so I don't have to recalculate all the ... /> Anywhere, really. Assuming you don't want it in the ROM ... already sacrificed quite a few T-states to enable the mixed mode ... 's a lot of wasted T. -
Determining 50hz/60hz in softwareHow can you determine in software if you are running at 50hz or 60hz?
I don't think that given code with ... . May calculate timings by exact T-states, or just run it on ... -
How to speed up TZX loading (emu development)With many newer emulators there are options to do faster loading schemes, even for turbo-loader or protected loader blocks in TZX files. For example,…
... to run as usual. Wouldn't I have to bodge R ... info, or even fiddle the T-states to ensure adequate frames have ... -
Speccy 128k Double Buffering.If I understand this right, you display either of the screens, and draw to the one that is not being displayed. Am i right in thinking that the Non …
... , timed so that you don't get a shear effect.
T-States (call it 40 if you ... second screen, and still won't compare time-wise.
Biotoxins redumping projectI've been spending quite a bit of time between dumping STP / MIA titles at looking at the titles flagged by Biotoxin as possibly needing a redump... …
I had to use an old version of CSW Viewer on GFOL side 2. The 0 bit is 563 and the 1 bit is 810 T States. 16642 bytes. The pilot tone looks normal. What did you find Mikie?Biotoxins redumping projectI've been spending quite a bit of time between dumping STP / MIA titles at looking at the titles flagged by Biotoxin as possibly needing a redump... …
... the 1 bit is 810 T States. 16642 bytes. The pilot tone ... really arcane stuff! You aren't by any chance working for ...MAME on the Spectrum?Yes, I know it's currently AY's job to make ludicrous posts (a position he's filling in very well, until TKRAP returns), but just out of interest, if…
... opcodes only use so few T-states, making it slower on a ... the APPLE I emulator however states that it is only a ...RealXThis may be a dumb question but will RealX ever get released?
... different offsets used to count t-states, that's all.
Anyway ... 48K timings with a logic states analyser and a CPLD circuit ... find the real values for t-states offsets (first contention, electron beam ...How to speed up TZX loading (emu development)With many newer emulators there are options to do faster loading schemes, even for turbo-loader or protected loader blocks in TZX files. For example,…
... each time).
* Number of T-States since last check must be ... 128. The actual number of T-States needs to be recorded for ... with the same number of T-States having elapsed as before, and ...GP2X handheld - ZX Spectrum emu goodnessIt's probably been covered here before, but I've spent the last week going crazy over the GP2X Linux-based, dual-core handheld that can emulate somet…
... ,INIR,OTIR,OTDR) execute 8 t-states faster than they should. I ...The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... Z80 instructions that take 23 t-states are ones that involve ... instructions that take over 12 t-states that I'd commonly ... pointers and typically take 5 t-states. Seeing as the equivalent register ... take between 13 and 16 t-states, but again their 6502 ...The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... sort routines and counted the t-states in each step:
... There are an initial 28 t-states used in the Z80 ... sort loop takes 22 t-states on the Z80, and ... br /> Comparing elements takes 114 t-states on the Z80 if a ... 1 iterations takes 15 t-states if failed on the ...The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... the instruction times are 7 t-states instead of 19. Like I ... said before, you really don't want to use the Z80s ... assumed it was when counting t-states for the 6502 version.)
t quite think is going to ...The Only Reason Sinclair Succeeded (Provoking Controversy)Although I love my Sinclairs dearly, I think that the only reason they succeeded was because at the time most people did not know any better (factori…
... colors at bottom... I don't think so.
There must ... Frank Capra movie instead counting T-states and bits here :DWhat are people using TommyGun to do?So I was just wondering what people are using TommyGun to do?
What are people using TommyGun to do?So I was just wondering what people are using TommyGun to do?
Pixel Explosion CodeJust a little snippet to cause explosive effects. It uses table lookups for the screen address, and can handle up to 32 pixel particles. A particle…
And when calculation is only called once,
then place calculationin the code, saves
1 call and 1 ret = 17 + 10 = 27 T statesULA......Woooooo and ULA 160??'ello all from down under ! they don't know the speccy well this way it seems, anyways, picked up my brand new astra yesterday, and it's got some …
The 160 is indeed significant - all emulator authors know of this magic number!
160 is the number of T-States it takes to draw 71.428571428571428571428571428571% of a scanline!
D.tips on optimizing assemblyI wrote a small routine to rotate right a whole screen character line complete with attributes. This is my third ever assembly routine, so I guess i…
... [/I][/B] as B hasn't been altered since reaching zero ... saves a byte and 3 t-states. Sounds obvious, but it's ... code loading values that aren't needed at that specific point ...tips on optimizing assemblyI wrote a small routine to rotate right a whole screen character line complete with attributes. This is my third ever assembly routine, so I guess i…
... [/I][/B] as B hasn't been altered since reaching zero ... saves a byte and 3 t-states. Sounds obvious, but it's ... code loading values that aren't needed at that specific point ...Help understanding some z80 asmI'm trying to work out how to represent the structure of a "sprite" in the SAM as "Grabbed" by SmallC. I can see the assembler implementation but I …
... 1 m-cycle and 6 t-states (and a 1 byte instruction ... is 2 m-cycles, 10 t-states and a 2 byte instruction ... +d) takes a whopping 23 T-states!Help understanding some z80 asmI'm trying to work out how to represent the structure of a "sprite" in the SAM as "Grabbed" by SmallC. I can see the assembler implementation but I …
... 1 m-cycle and 6 t-states (and a 1 byte ... 2 m-cycles, 10 t-states and a 2 byte instruction ... +d) takes a whopping 23 T-states![/QUOTE]
Yes ... um, yeah this ret doesn't need to be here, doh ... />
Sometimes you can't avoid it, though, when dealing ...The 150 pound home computerWe missing out on this still ... I think. I know the PC market has wrecked all chance for any alternatives to ever have a hope but ... what if. :lol:…
... ;170552]Buying the chip isn't enough?[/QUOTE]
You ... off by default, you can't use it. That leaves licensing ... 's way. However, it doesn't support direct support of 24 ... Z180 averages a few less T States / instruction than a Z80 but ...Sound / Kempston EmulationHi I'm working on a spectrum emulator and I need som help. i still have loads left with the Z80 (not fully implemented yet) but I'm trying to get a h…
... ... without keybord support it wasn't so magic, but it worked ... I´ve got are missng t states for a number of instructions ...C# emulatorHi, I wanted to branch out and get a little better with C# so I think I need something meaty to do to keep me going....so an emulator seemed a reaso…
... /> After every opcode, test the T-States counter. When it goes over ... frame's worth of T-States) from your T-State counter. This will ... another frame's worth of T-States.
"frame time" is ... just that - the number of T-States in a frame. 69888 Ts ...Features that emulators don't haveI believe most of us use more than one emulator, mainly because there isn't one emulator that has all the features we need or want to use. We also kn…
... the top of my head: T-States counting next to each opcode ...Features that emulators don't haveI believe most of us use more than one emulator, mainly because there isn't one emulator that has all the features we need or want to use. We also kn…
... /> [QUOTE=Philip Kendall;177390]Can't this just be done with ... - I suppose breaking on zero t-states would do the trick. I ...Features that emulators don't haveI believe most of us use more than one emulator, mainly because there isn't one emulator that has all the features we need or want to use. We also kn…
... glitches, etc.
[QUOTE]T-States counting next to each opcode ...
