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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 ... -
Post your photos!I recently got around to posting some photos of me on the net. I can remember a thread a few years ago where people posted their photos - let's do i…
... of times but don't bother with it anymore. ... I was actually asking Dr Beep as Brabant is a ... -sentence), but your profile doesn't state your habitat.
Remember: beep Dr Beep !!!!
[ ... was edited by: dr beep on 2005-02-07 ... -
Post your photos!I recently got around to posting some photos of me on the net. I can remember a thread a few years ago where people posted their photos - let's do i…
... -02-07 16:04, Dr BEEP wrote:
Well,
t state your habitat.
OK ... -
SpeedloadersSince I read Lee Tonks' post about the speedloaded version of MM3 he did, I've been playing around with various speedload routines I found on TTFn & …
[QUOTE=Dr BEEP;51282]Why shouldn't it not run in the ... way. Spent hours checking my T-State counts and eventually it was ... /> Does anyone know how many T-States the ULA spends holding ... -
VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…
... that trying to squeeze a T-state out here and there ... things from Dr. Beep and obo. Dr Beep had probably the ... [QUOTE=digital prawn]I didn't realise until reading your post ... use up. You can't store m/c or BASIC ... fair amount of software won't work. However, if you ... -
Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …
[QUOTE=Dr BEEP;355445]seems like another delay ... could replace them with 18 T-state delays, or you could just ... -
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…
... t-state delay
nop ; 8 t-state delay
nop ; 4 t-state ... jp nz, be_h_and_l_lp ; 10 t-state jump
xor %00010000 ... />
; THE 'BEEP' COMMAND ROUTINE
org 0x03f8 ...
beep:
fwait ; enter ... -
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 ...
