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Z80 to TZX Converter !Hey Everyone ! I have a bit of time lately and I coded a little utility that can convert the Z80 snapshot (any version, 48k and 128k supported) to T…
... playing it back, somehow the T-States get a little bit prolonged ... find the best combination of T-States so it loads properly on ... -
Z80 to TZX Converter !Hey Everyone ! I have a bit of time lately and I coded a little utility that can convert the Z80 snapshot (any version, 48k and 128k supported) to T…
... version. The timings is 200 T-States for bit 0 and 400 ... -
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…
... single screen (only one mode per scanline at the moment tho'), and ... -
Amiga MOD on ZX SpectrumWell, there were several question about music matters on WOS lats times, so I decided to describe some of my 'adventures', heheh, with MOD playing on…
... samples you get around 450 T-States to play with. The question ... for you). But I can't think of a good way ... -
EmuzWin and Dsk format. Some day?Hello, Vladimir. Are you working on implementation of dsk format in EmuzWin?. Anybody? Thanks
Phew ! Finally !....
Pity this version doesn't have a 'scanline' blitter... :) -
BASIC OptimisationsOk, BASin is maturing fast and now I want to add some more special "stuff". A guy called Chris requested by email that I include a REM killer, to s…
... /> All times are measured in T-States (CPU cycles) which should help ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... the last but 1 T state of an instruction ... the start of the last T state.
... routine. However, this doesn't work on the 128K machines ... M cycle takes 2 more T states than usual when ?INT ... work but it isn't the correct instruction for ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... the clock in the last T state of the last machine ... M cycle takes 2 more T states than usual when ?INT is ... ]
[/quote]
33 T states. RET takes 10, not 4 ... might work but it isn't the correct instruction for the ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
According to Programming the Z80 RST instructions take 11 T states. 2 T states are added to M1 if /INT is present. Where do you think this is wrong? -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... RST instructions take 11 T states. 2 T states are added to ... part where you say 2 T states are added. A " ... instruction does indeed take 11 T states: 5 for an opcode ... . You can't just say 'add 2 T states' because the ... by the usual 3/3 T states to push PC.
... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... cycle description says that 2 T states are added to M1 to ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... cycle description says that 2 T states are added to M1 to ... acknowledge cycle. It states that two wait states are automatically inserted to ... settle) + 2 automatically inserted wait states during which time /IORQ is ... br />
Now, I don't know why it's not ... -
Collision DetectionHi everyone, This is my first post on WOS. Like most people here I owned a Spectrum when a teenager. At that time I was quite heavily into programmin…
... /> *
* TIMING: worst case 3745 t-states for no collision.
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I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…
... opcode takes a number of T-States to complete. Keep a counter ... explaining to me what T and M states are? I think I ...Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... might suck up too many T states -- you'll want to put ...Wanted: Code to wait until Border has been drawnWhen my IM2 interrupt fires, I want to wait until the ULA is past the first line of display before drawing. I know I need to wait about 14300T after…
... this. I prefer the counting T states method, but make use of ... lot of things in 14000 T states. The jitter between machines doesn ... even if jitter is 200 T states. If doing multicolour effects, you ... machines in the number of T states spent in the top border ...TZX and the ZX81Evenin All. EightyOne is now is a state where I can support a more descriptive tape format. I know how some people have been calling for tzx suppor…
... Length of a Pulse in T-States
06 2 Length of ... the last byte (I don't think anything ever put out ... data it encodes isn't. The ZX80 doesn't put out any ...RZX for Sabre WulfI was just about to send an RZX for Sabre Wulf to the RZX Archive when I noticed they don't accept Ultimate's (and other companies' who haven't given…
... when I noticed they don't accept Ultimate's (and ... other companies' who haven't given permission) files.
[/ ... between those companies which haven't given permission (most of them ... with some additional stuff like T-states.
[/quote]
...Cobra - scrollingHi everyone, I have been studying some of the code in Ocean' Cobra game using a debugger, in the hope of improving my own scrolling routines. In cas…
You mean it is so fast that they actually had to slow it down by 70000 T-states???!!! yikes!Cobra - scrollingHi everyone, I have been studying some of the code in Ocean' Cobra game using a debugger, in the hope of improving my own scrolling routines. In cas…
Judging by the quoted number of T States it's probably a routine to wait for screen sync.How can I see how long it took for IM2 to runHow can i see how many cycles it took for my interrupt routine to run, is there some way with Spectaculator debugger etc to see how long it has taken…
Assuming the debugger has breakpoints and T-States set a breakpoint at the start and end of the IM2 vector - the difference in T-States will give you the number of cycles it took to complete.If you could re-design the Spectrum...Let's suppose you could go back in time to the beginning of the Eighties. The Spectrum is being designed as the revolutionary successor to the alread…
... for scanlines, and separate attributes per scanline. Add in a programmable color ...Z80 register decoding document error?Hi, I've been working on a disassembler using the following document written by Cristian Dinu (aka GOC?). [url="http://www.z80.info/decoding.htm…
... nothing. If the difference isn't obvious, think about interrupts.
t affect anything). After the optional ... instruction that takes 4 more t-states.
Actually, even a ... 'x-state NOP' notation isn't 100% accurate, seeing as how ...new release of winTZXHi all I released winTZX 0.4drc1 (04/02/2005) + Added CSW file support + Added block selection (replay and save) + Added reverse output + Added direc…
... with it.
The T states for a pilot pulse is ...Help needed to speed up functionCan anyone help me to re-factor this code snippet. The "MAP" section holds information about which tiles go where on the screen (handled by another f…
... the code again I can't actually see any reason for ... /POP DE and save 21 T States.
[ This Message was ...Anyone help re-factoring a tile functionI had some excellent feedback for re-factoring my function that displays the colour for my screen tiles. Can anyone offer some help to improve the fu…
... ). I think that takes less T states. The transition between screen thirds ...Anyone help re-factoring a tile functionI had some excellent feedback for re-factoring my function that displays the colour for my screen tiles. Can anyone offer some help to improve the fu…
SET 4,B = 8 T-states
LD B,16 = 7 T-states
See for timing
[url="http://www.z80.info/z80flag.htm"]http://www.z80.info/z80flag.htm[/url]Anyone help re-factoring a tile functionI had some excellent feedback for re-factoring my function that displays the colour for my screen tiles. Can anyone offer some help to improve the fu…
Thanks for that, I just spoted that one my self after searching the net for Z80 T-states.Interrupt timingsHow long does the ULA hold /INT low for on interrupt on each of the Spectrum models?
I've got a TS2068, and would be interested in getting this number worked out for that machine, though looking at the source it seems I need to know the number of t-states before the first non-border cell first.
TBC
