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enJine: a fast tilemap enginetile engine based on excellent work by Joffa Smifff. here you can download first tech demo. [url=http://ketmar.no-ip.org/tmp/enJine.tap]Get It Now![…
... /> putting helicopter sprite takes ~1900 t-states for just LD and ... ~2700 t-states for ORed sprite (for ... one interrupt, so we can't play AY music here. still ... 'missing' interrupt -- only make blitters 't-state-stable').
p.s ... -
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
...
[/list]
Moreover, a Z80 snapshot of Thanatos 128K converted to ... /> [*]The Thanatos 128K .Z80 file was a snapshot made while running the ... -
numbers to binaryHi everyone, I have looked through the manual and have found nothing. How do you change a number to binary easily? I know you can go binary to decim…
... know that when you didn't state that in your post :-)...][/QUOTE ... -
Serial protocol, help!Hi, simply trying to find best way to transfer programs from PC to real ZX Spectrum for testing purposes. Under Windows I tried using Spxfr and it w…
... ld d,0x80 ; 10000000 | 7 t-states
di ; ... port between 5th and 8th t-state.
Best ... ideal time (at 4 t-state of an in instruction). ... data_bits code at 19th t-state of start bit and ... reliably at approx. 15th t-state. But since best case ... -
Serial protocol, help!Hi, simply trying to find best way to transfer programs from PC to real ZX Spectrum for testing purposes. Under Windows I tried using Spxfr and it w…
... just 3 t-states (from 25 t-states to 22 t-states) ... wastes 10. we are @ 10th t-state of start bit when data ... case: start bit comes one t-state too late for in a ... data bits that is 24 t-state of start bit in best ... case and 22th t-state of first bit in worst ... -
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... it's based upon a .Z80 snapshot grabbed under +3 emulation. -
Serial protocol, help!Hi, simply trying to find best way to transfer programs from PC to real ZX Spectrum for testing purposes. Under Windows I tried using Spxfr and it w…
...
Best case:
11 t-states
Worst case ... is 32-11 = 21 t-states. Before reading data bits ... . 17 t-states to fall into 28-49 t-state. Adding ... cca. 7 t-states of the ... into the 5 - 26 t-state of data bit (length 30 ... -
128K Contention - How to get it right?With my recent hardware hackery, I've built a 128K (toastrack) clone. I can't quite get the contention right though. What I'm lack is a clear descri…
... =Philip Kendall;547605]It doesn't. It checks whether writing to ... .
So I don't think I fully understood the ... same range have the first T-state contended (eg 0x7ffd).
t on the +3). Well known ... -
ZX Spectrum 48K clone and test resultsHi! This is my first post, so, first of all, I'd like to say hello to the whole community! I am Alessandro Dorigatti from Italy and I'm developing …
... specific T-State. When the test starts, the T-State is ... border, as the 14336 T-state".
T-State 14335
----------------
T-State, and this is ... the result:
T-State 14334
----------------
"1 ... -
Games featuring... relevant bugsThere was a recent improvement to the WoS database in order to classify [URL="http://www.worldofspectrum.org/forums/showthread.php?t=34261"]Games fea…
... .uk/~jg27paw4/pourri/simpsons-graphics2.z80]snapshot[/url] of it. RUN 10 ... tables are embedded in the snapshot at the addresses mentioned above ... -
automatic relocating of non-relocatable codeI was pondering upon the problem of changing absolute addresses used by CALL, JP, etc. when code is moved, without reassembling at the new location; …
... /> Or to save one whopping t-state you can:
[code ... -
Emulator that breaks on TZX tape stop?Is there an emulator that will break/pause on TZX tape stop, so I can save a snapshot before it redraws the display? TIA!
Cheers Bruno! That does just what I need. :)
Now I have a working z80 snapshot I can look at moving to a microdrive on the real thing.
Thanks for everyone elses suggestions too. -
line, plot and circle in whole 256x192 displayhi! are there some way to draw lines, or whatever, in the whole 256x192 display, than just the above 256x176 part? (this is the msx1 version i made o…
... difference in output between the .z80 snapshot you showed and the output ... a disney scene, while the .z80 snapshot seems to actually "draw" them ... .. The result is that snapshot version looks crisp while the ... -
Paging memoryI've been thinking about a possibility of paging blocks of memory to and from disk. Imagine dividing usable 32KB of Speccys RAM (why do they call it …
... writable memory, and the Z80 doesn't have to do [I] ... the access timing isn't a problem here since the ... Spectrum experience', this isn't a 64 bit, quad- ... is part of the normal Z80's address space.
... on hardware support). That doesn't [I]necessarily[/I] mean ... -
Paging memoryI've been thinking about a possibility of paging blocks of memory to and from disk. Imagine dividing usable 32KB of Speccys RAM (why do they call it …
... size [I]felt[/I] (don't have hard numbers) like it ... , main memory / disk just can't keep up with multi-core ... /> Of course Spectrum's Z80 doesn't have CPU cache, and perhaps ... -
Weird issue with 128 Heatsink and IF2 cartI came across a weird issue with one of my 128K heatsink spectrums.... First of all i burned Paul Farrow's 128K RAM tester v 2.06 on a 27C128 eprom …
... ?) then possibly one of the Z80 signals /MEMRQ, A14, A15 does ... . Did you try a different Z80?[/QUOTE]
Αs a ... ... tried another one brand new Z80, didn't fix it...
New SpecBAS available - v0.710Been a while, but I've just uploaded the latest build of SpecBAS. This one now supports tilemaps (with rotation and scaling) and added OVER mode (XO…
[QUOTE=Dunny;579193]I shall pop an archive of demo programs up for you. Here you go:
[url]https://sites.google.com/site/pauldunn/demos.zip[/url]
Unpack that into your Specbas folder.[/QUOTE]
Thanks mate. Although now ...New SpecBAS available - v0.710Been a while, but I've just uploaded the latest build of SpecBAS. This one now supports tilemaps (with rotation and scaling) and added OVER mode (XO…
... to it. Also, you don't state the minimum specs. needed to ... at a push). It won't become unusable on slower CPUs ...Which Speccy game had best border effectsIn truth, I'm just trying to remember a game from my youth, and the amazing border effect during pause is the only thing I can clearly recall about i…
... but you certainly can't switch it every 8 pixels ... pixels of screen is 4 T-States, the equivalent of ... instruction, and you can't change numbers that fast. About ... OUT (254),A[/B] ;(11 T-States)
which ... of 16 T-States.
Each T-State is 2 ...Which Speccy game had best border effectsIn truth, I'm just trying to remember a game from my youth, and the amazing border effect during pause is the only thing I can clearly recall about i…
... more useful total of 16 T-States.
[/QUOTE]
t need to copy values ... that completes its last T-state the moment after the ... ),A which completes 11 T-states later just in ... wide band. You couldn't do that continuously, though, ...Which Speccy game had best border effectsIn truth, I'm just trying to remember a game from my youth, and the amazing border effect during pause is the only thing I can clearly recall about i…
... time every frame, which isn't as easy as you might ... , i.e. multiples of 4 T-states. So unless you calculate ... to be a 1-3 T-State delay before your routine begins ...Which Speccy game had best border effectsIn truth, I'm just trying to remember a game from my youth, and the amazing border effect during pause is the only thing I can clearly recall about i…
... time every frame, which isn't as easy as you might ... , i.e. multiples of 4 T-states. So unless you calculate ... to be a 1-3 T-State delay before your routine begins ...BezerkI don't think that Bezerk was ever converted to the Speccy and I've always found it a playable little arcade shooter... And Android One doesnt count!…
... pretty as possible. Learning Z80 shouldn't be much of a problem ...Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... running, or look at the t-state count in a debugger at ... ? Or something else you hadn't considered?Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... running, or look at the t-state count in a debugger at ... ? Or something else you hadn't considered?[/QUOTE]
Well ... 20x160 square and it doesn?t go very slow. In RI ...Faster CLS...Hi Folks, Looking at the CLS command in the Spectrum ROM disassembly it seems rather complex. Does anyone know of a simpler/quicker routine that wi…
... can an LDIR at 21 T-states (plus contention, so 24T ... in less than 100,000 T-states?[/QUOTE]
It sounds ... the values might be subtracting t-state values for the start and ... debugger shows the number of t-states since you were last ...Which Speccy game had best border effectsIn truth, I'm just trying to remember a game from my youth, and the amazing border effect during pause is the only thing I can clearly recall about i…
... every frame, which isn't as easy as you might ... .e. multiples of 4 T-states. So unless you calculate ... to be a 1-3 T-State delay before your routine ... need, run at particular T cycle, with T cycle accuracy. See ... .org/forums/showthread.php?t=17551&page=10# ...Changing background graphics - King's ValleyCould you recommend me a way how to change the background patterns in this beautiful game? I want to get rid of that grid pattern because it makes th…
... I managed to save a Z80 snapshot and converted to TZX and ...It's almost lifelike!!!We were easily impressed back in the Speccy days. And I'm sure we will look back on modern games today wondering why we thought it was "almost" real…
... it ruins all the careful t-state counting though :))
