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Fuse bug? Strange T state countingI was testing delay routine presented [URL="http://www.worldofspectrum.org/forums/showthread.php?p=214851"]here[/URL]. I'm reproducing its listing: …
... executing in Fuse emulador, the T-state counter showed a difference of ... nc' instruction takes 18 T (instead 11 T) to be executed. After ... subsequent RET takes 16 T, instead 10 T stated in the ... More intriguing, this behavior isn't observed when I simply execute ... -
Ensure my interrupt handler begins at the same T-stateHi! Is there a way to ensure that an IM 2 interrupt handler starts always at the same T-state (related to the moment the ULA triggers the INT line, w…
... starts always at the same T-state (related to the moment the ... to last a number of T-states which is a multiple ... portion of instructions that aren't HALT last a number of ... -
ScanlinesHere's an excerpt from the FAQ: [quote] Now for the timings of each line itself: define a screen line to start with 256 screen pixels, then border, …
... this takes 224 T states. Every half T state a pixel is ... it does so each 4 T states (and then it ... follows: 128 T states of screen, 24 T states of right ... border, 48 T states of ... horizontal retrace and 24 T states of left border.< ... -
New Spectrum emulator for DS[url]http://zxds.raxoft.cz/[/url] [quote]Features already implemented: * Solid Z80 core - possible bugs aside, the Z80 emulation is as complete…
... /O, each instruction modifies the T state properly as well. The emulator ... per frame, though, so don't expect any multicolor features to ... the emulator with reasonably precise T timing and with enough speed ... -
Thinking ahead...Just mulling something over for the Project After The Spectranet (which seems to have become never-ending...) Would anyone (except for me, naturally…
... various times (for example, each T-state - or perhaps with a free ... also debug programs that can't easily be debugged in an ... easier.
Just don't hold your breath for an ... -
42 colums in screen, in anywherethe routine write in anywhere of the screen, it can start to write in 32X24 position and write from it in 42 colums, it is utility to have border wit…
... reachable, and easy to chose T-State or code size.
-> ... -
testing if speccy is fully functionalHi, There is so much mention of T states but still confused. Does this mean if an instructin is out by a T-state or more then the speccy is faulty?…
... is so much mention of T states but still confused. Does ... instructin is out by a T-state or more then the speccy ... somewhere that speccys have different T states depending on the warmup ... this not mean that the T-state for all instructions should be ... -
J&P Electronics Ham radio programsFor these programs linked below G4OIK is the ham call sign for J.E. Price and G4OIL for J.E. Price (same name different person) so the authors for th…
... these programs although it doesn't state this on some of the ... -
How many AY trackers are available for the Spectrum?Is there a review anywhere comparing the different AY trackers that are available for the Spectrum -- in terms of versatility of output, memory usage…
Is there a review anywhere comparing the different AY trackers that are available for the Spectrum -- in terms of versatility of output, memory usage, T-state usage, and any other relevant criteria? -
Mugsy screenshots?I've only just noticed this, but the screenshots on the cover of [I]Mugsy[/I] are different to the actual game: [url]ftp://ftp.worldofspectrum.org/pu…
... />
The archive entry doesn't state that the game was available ... the game that I don't know about? If so, I ... -
Incorrect Spectrum +3 emulation: different results on Fuse and SpecEmuWhen developing and testing [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0027591"]Rotatrix[/URL], I noticed different results on Fuse and S…
... and SpecEmu. Unfortunately I don't have a real Spectrum +3 ... /> Line 48 introduces a 2 T-states delay in the border ... to the well-known 1 T-state delay from "late timing"). This ... behavior incorrectly, I just don't know which one...
Revisiting Spectrum CPU clock regenerationWarning: This post will be a bit nerdy :-) Some time ago, I experimented with phase locked loop circuits as a possible way to regenerate the Spectru…
... the regenerated clock starts at T-state 2 in this diagram, and ... . And by the beginning of T-state 8, the Spectrum's clock ... 's almost caught up by T-state 29 (and it gets corrected ... the change at the correct T-state.
- Will this work in ...Zero 0.5 ReleasedAfter a bit of a hiatus, the next update of Zero is now available [URL="www.ramtop.wordpress.com"]here[/URL]. Feedback and bug-reports appreciated! …
... sound playback routines. Shouldn't make any difference to end ... Pentagon rendering with a more t-state accurate core and renderer ( ... of the last scanline weren't being rendered sometimes.
... to reflect the latest memory state.
- Fixed incorrect ...Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…
... wondering given I can't find anything immediately wrong ... look up table using the t-state as an index.
... is correct.
My t count for each instruction ... am guessing I haven't applied all the situations ... the above routines wouldn't handle or have any ...cause of 1 tstate differencethe sinclair faq, located at: [url]http://www.worldofspectrum.org/faq/reference/48kreference.htm[/url] says: "NB: Investigations in May 2004 have rev…
... FAQ, while others are one T state later for all timings. The ...Understanding contentionI'm trying to understand contention and its implications when some "weird" bus cycles (such as I/O cycles with I/O addresses in the contended memory …
... there is also one more T-state that is contended in this ... T1 to be enlarged 6 T-states if the I/O ... too would enlarge T2 5 T-states instead of 6, am ...Optimized (in size) Z80 simulatorI am evaluating Z80 simulators to try to create a tool to analyse z80 programs. I'd like to start with a simple register coverage tool and t-state cy…
... simple register coverage tool and t-state cycle counter to show to ...3.5" disk drive on plus 3 or HXC/GotekHello all I have a zx spectrum +3 and in the late 90s I used a teac FD-235F drive as an external 3.5 drive. It was very eay to connect as it had …
... than the HXC, but don't state if they are speccy plus ...How do emulators make code appears as running at 3.5Mhz?Decent Z80 emulators on github return t-states after executing an instruction, giving you the ability to emulate Speccy relatively well. But there ar…
... on github return t-states after executing an ... are two issues I don't understand yet.
t-states), isn't ULA painting during ... Stopwatch's resolution). Speccy t-state is 1/3.500. ... a difference. For 4 t-state instruction that's 11 ...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…
... a local network. Games doesn't have to be modified, you ... -io-ports: to get keyboard state and joystick
-get-snapshot ... -io-ports: to change keyboard state and joystick
-write-port ... : IM mode 0 is 1 t-state shorter than IM mode 1 ...ZEsarUX 8.1 stableHi! I've uploaded a new ZEsarUX 8.1 stable version. Go to the github released webpage to download it: https://github.com/chernandezba/zesaru…
... local network. Games doesn't have to be modified, ... io-ports: to get keyboard state and joystick
- ... io-ports: to change keyboard state and joystick
- ... mode 0 is 1 t-state shorter than IM mode ... OS speech filter doesn't fail anymore when message has ...Sound emulation methodsI am working on a little emulation project for fun and also with the 40th anniversary of the 48k shortly followed by my Issue 2. I have the video and…
... is rendered IO access toggles state and fills from last toggle ... previous stage. I simply use T-state within frame to workout index ...Exact emulation of the Snow effectAs the original post on another forum is outdated, and for those who don't know about that forum, I duplicate this info here: At the beginning of …
... , and for those who don't know about that forum, I ... on this 3rd pixel cycle T-state, it's the first pixel ... on this 5th pixel cycle T-state, the CAS is kept low ...Solution for overwritten stack in 48k SNA filesIt has been known for quite some time now that the 48k SNA file format has one serious fault, which is described in the file formats section on the W…
FWIW, I also discard the t-state counter when reading .z80 files and set it to zero when saving them :)
Bit naughty of me really ;)Castlevania ZX looking REALLY nice in color :)[url="http://www.redeya.com/bytemaniacos/castlevania.html"]http://www.redeya.com/bytemaniacos/castlevania.html[/url]
... that basically you have 448 T states between each update (working ... attributes being subtracted from those T-State values).
A mixed mode ... a status panel which doesn't need to be touched until ... claws back a load of T States for use elsewhere).
TZX compatibility issuesI seem to have a problem with using TZX files on different emulators. Specifically, files Saved As TZX from emulator. I better explain: I have a fe…
... the same based on the t state lengths and the 3.5MHz ...Beta versions of Fuse 0.6.2 and libspectrum 0.2.1 availableDear all, The Fuse team is pleased to announce the release of a beta version of the upcoming 0.6.2 release of Fuse and the Fuse utilities, as well a…
... the beginning to adjust the T-state delay before the display mode ... in there as I wasn't sure myself what the timings ...
