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Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... where it begins listing the T state stuff and put a breakpoint ... -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... where it begins listing the T state stuff and put a breakpoint ... per opcode then things don't work too well atm. I ... -
Cubic RevealI just though I'd develop this a little further. Written a while ago on a whim! [img]https://dl.dropbox.com/s/p44y5dda49ucmop/square_reveal_1_1.gi…
Anyone for T? I've saved a whole 1, yes 1 t-state!!! -
Detecting +3 / +2AWhat's a simple but reliable way to detect if code is running on a +2A/+3? My first though was to try switching to ROM2 and then checking for the …
... exploit, but I haven't tried it myself. I ... read / write to 2 T-states out of every ... s restricted to only one T-state out of 8. So, ... being written over 16 T-states (one byte every ... of 7 and 9 T-states (plus any multiple ... 48K or 128K wouldn't have a problem with ... -
Fast Binary to Text DisplayI've done this thing that takes some memory contents and converts it to a Binary version of 0's and 1's on screen. However, I've no idea what to use …
... big_lp iteration (and even 1 T state per an entire routine call). -
MAME in spectrum emulationHey to all Does anyone use MAME as a emulator port for any Speccy HW? I was so far away from MAME developments I forgot they merged with MESS whic…
... check is needed on every T-state) it may impact performance in ... -
Fast Binary to Text DisplayI've done this thing that takes some memory contents and converts it to a Binary version of 0's and 1's on screen. However, I've no idea what to use …
... kidding. RL C is 8 T states; RRD 18!
[/code]
(1 T state faster at the expense of ... />
Better yet. Save 5 T states per iteration by replacing ... -
I introduce myself and my emulator.Hi! My name is Marta, and I've been a Speccy user for 30+ years now. During the past year I decided to write my own emulator, just to see if I cou…
... interrupt line every T-state, while the docs clearty state that it must ... the beginning of the last T-state of the last M-cycle ... -
Making sound using the BEEPER in AssemblyI had a look at the the documentation but it doesn't make sense to me. To make music just the beeper all I have to do is send ones and zeros to one o…
... do it myself.
T state breakdown is as follows:
T states.
48K: 3 ... -
Making sound using the BEEPER in AssemblyI had a look at the the documentation but it doesn't make sense to me. To make music just the beeper all I have to do is send ones and zeros to one o…
... the X axis denotes the T state into the contention pattern, and ... delayed until the first uncontended T state in the pattern. On the ... action falls on an uncontended T state ('if you are already sitting ... end up at T state 6.
Contended read on T state 1: a ... -
Making sound using the BEEPER in AssemblyI had a look at the the documentation but it doesn't make sense to me. To make music just the beeper all I have to do is send ones and zeros to one o…
... 2nd of the 4 last t-states of any OUT command ... with 6th or 7th t-state of an 8 t-state cycle, counting from ... -
Making sound using the BEEPER in AssemblyI had a look at the the documentation but it doesn't make sense to me. To make music just the beeper all I have to do is send ones and zeros to one o…
... between the contended T states of OUT commands (T state 2/4), as ... time. This causes its 'contended T state' to be aligned with the ... first uncontended T state of the 8T cycle. Which ... now aligned with the uncontended T state of the 8T cycle. Once ... -
Fuse/SPIN vs Spectaculator border timingsHello, I'm trying to figure out at which moments the 48K ULA samples the current border color into its internal latch. To do that I wrote a small …
... know for sure at which T state of the OUT instruction's ... -
Raster effects - quick questionHi Guys Just a quick question regards what the ULA is doing as its drawing each scan line. Assuming the beam has finished drawing the border, am I…
... the left. So for 96 T-states per line there is ... which tick in a multi-T-state instruction the read or write ... writes. You see, you can't even rely on the interrupt ... />
Nirvana etc. engine doesn't use a linear buffer of ... -
Test of screen switching timings.I modified the btime.tap test by Jan Bobrowski to explore the timing of screen switching. The new test, ptime-128, produces different results on diff…
... ]by adding a 2 T-state delay (3 T-states for the toastrack ... -
Test of screen switching timings.I modified the btime.tap test by Jan Bobrowski to explore the timing of screen switching. The new test, ptime-128, produces different results on diff…
... ]by adding a 2 T-state delay (3 T-states for the toastrack ... -
Test of screen switching timings.I modified the btime.tap test by Jan Bobrowski to explore the timing of screen switching. The new test, ptime-128, produces different results on diff…
... ]
Interesting! I hadn't seen that thread. In Patrik ... attribute byte in the same T-state or by fetching the attribute ... byte one T-state later (though the latter variant ... ULA 128K machine I don't get the same pattern as ... -
Test of screen switching timings.I modified the btime.tap test by Jan Bobrowski to explore the timing of screen switching. The new test, ptime-128, produces different results on diff…
The second way is right, a real machine can't fetch both screen bytes at the same T-state. -
Test of screen switching timings.I modified the btime.tap test by Jan Bobrowski to explore the timing of screen switching. The new test, ptime-128, produces different results on diff…
... screen bytes at the same T-state.[/quote]
In 48K ... timing configuration, but I can't really see what that would ... -
Test of screen switching timings.I modified the btime.tap test by Jan Bobrowski to explore the timing of screen switching. The new test, ptime-128, produces different results on diff…
... screen bytes at the same T-state). But if you want to ... -
Test of screen switching timings.I modified the btime.tap test by Jan Bobrowski to explore the timing of screen switching. The new test, ptime-128, produces different results on diff…
... screen bytes at the same T-state). But if you want to ... -
Fuse/SPIN vs Spectaculator border timingsHello, I'm trying to figure out at which moments the 48K ULA samples the current border color into its internal latch. To do that I wrote a small …
... count the 224 * 64 = 14336 T-state as the base tick when ... tick 11649 does, it can't affect the appearance of the ... value is latched and can't be changed till the next ... is not really the 14336th T-state at which the first pixel ... -
Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... DISPLAY "ERROR: delays below 131 t-states are not supported"
t-state if bit 0 is 0 ... : cp (hl) ; add 2 t-states if bit 1 is ... skip4 : ccf ; add 4 t-states if bit 2 is ... by invoking a micro: ArbitraryDelay T, where T >= 131. The ... -
Fastest emulator screen renderingHi, I'm developing an algorithm for fast emulator screen rendering and here is what I came up with. 1) Use 4bpp indexed image format as target …
... should be, based on current t-state, and
3) draw the ... -
Fastest emulator screen renderingHi, I'm developing an algorithm for fast emulator screen rendering and here is what I came up with. 1) Use 4bpp indexed image format as target …
... should be, based on current t-state, and
3) draw the ... other compounding factors, you can't actually output a sample at ... a time, as you don't generally have time to do ... -
ZEsarUX Beta 8.1Hi! I have uploaded a new ZEsarUX 8.1 BETA version. You can download compiled versions for Windows, Mac, and the source code from: https://gith…
... : IM mode 0 is 1 t-state shorter than IM mode 1 ... -
ZEsarUX Beta 8.1Hi! I have uploaded a new ZEsarUX 8.1 BETA version. You can download compiled versions for Windows, Mac, and the source code from: https://gith…
... : IM mode 0 is 1 t-state shorter than IM mode 1 ... the IM instructions take 8 t-states
In practice ... take the same number of t-states (11) as per above ...
