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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 ... -
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! …
... 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 ... mode.
- Fixed inaudible beeper sound when played parallely with ... -
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…
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I have sound working - beeper only. I keep a per ... is rendered IO access toggles state and fills from last toggle ... previous stage. I simply use T-state within frame to workout index ... -
Question about 2-channel beeper musicI confess I haven't tried all the available beeper utilities and software. I always found music software confusing and trackers are not for me. I kno…
... on the 48K spectrum beeper is quite straightforwards ... hand as every T-state is critical in ... br /> Whilst I haven't tackled beeper music, I did spend ... version cycled the beeper every 84 T-states (12 low ...
3-channel beeper music is also probably possible ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... ; unused location
; THE 'BEEPER' SUBROUTINE
org 0x03b5
t-state delay
nop ; 8 t-state delay
nop ; 4 t-state delay ... interrupts
ret ; end of beeper subroutine
; THE ' ... -
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…
... your playback routine must be T-state counted. There is no ... bit sampled instruments on the beeper. The results are really ... music using a variety of beeper engines with different characteristics. ... . Some of the spectrum beeper engines have been ported to ... -
Running out of fingers in AssemblyDear all, Still trying to learn Assembly and have put a few routines together. However, as my routines become a little more involved I find myself…
... the z80 optimisations and T-state counting as 'intermediate to ... advanced'. Remember, you don't have to learn everything ... br /> - I didn't count T states or use an ... to the ROM beeper routine, I didn't use OUT ... that maybe I wouldn't have written such shoddy ... -
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…
... until the first uncontended T state in the pattern. On ... falls on an uncontended T state ('if you are already ... up at T state 6.
Contended read on T state 1: a ... 10 and so on in beeper engines, this means that the ... the OUTs in a beeper sound loop are timed ... -
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…
... have much less experience with beeper-engines than you!). But in ... between the contended T states of OUT commands (T state 2/4), as ... . This causes its 'contended T state' to be aligned with the ... first uncontended T state of the 8T cycle. Which ... -
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…
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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 ...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 ...
