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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 …
... only work for 16 bytes per line
in the ... 128K only takes a few T-states
and this ... code to you win 106 T-states
in a line, ... NOP
(total 106 T-states)
[/code]
... multicolour even if you don't
understand MC ... -
Graphics mode:64x48x8 colors possible on Spectrum?That multicolor River Raid demo inspired me to make this question: If we filled all the screen with chessboard pattern [code] 00001111 00001111 00…
... rows taken alternately from the two display file. This way a ... virtual thumb for 4*224 T states, the program calls a sequence ... -
The best ... beginning with "F"Name (in your opinion) your "Best game beginning with [A to Z, one letter per post]". So, for the letter "F", which do you think are the: [B]Best…
... to Z, one letter per post]". So, for the ... Lissa isn't too bad. Operation Wolf and Operation Thunderbolt were ... Best text adventure: [/B]Don't know.
[B]
Best Utility: [/B]Don't know.
[B]
... person so I don't know offhand which demos ... -
Reading from the 128 Serial PortDon't shout at me if this is a silly question. I have Googled extensively, and searched the forums, but I can't find anything discussing what seems t…
115200 Baud is indeed possible for transferring files from PC to Spectrum.
I used a test file holding 6912 times CHR$ 51, and "Splitcom" found at:
[url]www.propix.hu/share/SplitCom/SplitCom.html[/url]
Baud rate 115200, 8 data bits, no ... -
Question about ZX Spectrum AY interfacesI got this information from Mike, author of EigthyOne: [QUOTE]128k spectrum 1.7734 MHz Timex 1.764 MHz ZON-X 1.625 MHz Fuller 1.625 MHz QuickSilva 0…
... up a couple of thousand T-states in processor time, so the ... being played a semitone or two too low - as cheveron says ... -
Has any programmers recently pushed the spectrum to the limits?Hi there. Ive just discovered this great forum and I was brought up with the speccy 16,48 and then 128k. Im just wanting to know if there are any re…
... arbitrary characters if you don't mind storing the attributes ... instructions holding the attributes aren't next to each other ... />
; Hit here at 14164 t-states
LD SP, 5820H ; Load ... TST1 LD BC, 1008H ; First two bytes of attribute data - the ... -
Battle of the retro songs!I present you: The new release: Aqua - "Back To The '80s" [youtube]kw5s3CB_1pE[/youtube] The previous king of the retro songs: Bowling For Soup - …
... ]Having more than one interrupt per frame can greatly enhance amplitude ... routine is called ever 500 t-states!
[url]http://www ... -
Ahh.. the tape loading era! by ate bit[url]http://www.pouet.net/prod.php?which=53846[/url] It is UNBELIEVABLE!!! Effects while loading, MUSIC while loading (and loading normal speed !!!…
... /> [/QUOTE]
Haha, I don't know! I *do* know that ... see the comment "Wait 358 T states before entering the sampling loop ... need to load 6912 bytes per frame. You could speed that ... -
The Goldfinch updates thread([url=http://www.worldofspectrum.org/forums/showthread.php?t=25034]original announcement thread here[/url] - I figured it was worth starting a new to…
... paging within a few thousand t-states of a reset, or ... the paging registers, they won't do anything. Because the ... estimate at least thousands of T-states) when the Z80's ... of the circuit and spent two days confusedly banging my ... at least 100,000 T-states! -
More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... raw. This gave us the two ULA+ ports required.
... the border. There isn't much time (see earlier ... able to update two palette entries per scanline. Update to ... the border colour load won't collide with them.
... out. But that shouldn't matter just yet as ... -
AY programming and notes frequencyHello everybody, I'm Targhan from the french CPC group Arkos, perhaps you've heard of us. I'm currently working on a music tool and I'd like to k…
... the ROM is ones, two one pulses per one bit = 8192*8 ... with its own inaccuracies. For two anecdotal data points see
t think the tape measurement alone ... -
ZX81 more powerful than the Speccy?I have been reading ?The ZX Spectrum Book 1982 - 199x? by Andrew Rollings (thanks again, Andrew - it?s a great read!). There are some comments in the…
... ZX81 though. It certainly isn't more powerful than the Spectrum ... of CPU time you get per frame is very little - just ... amounts to about 20,000 t-states, whereas the Spectrum gives you ... -
memory chips spectrum +Hi with regards to memory chips the ones in there are tms4116 in the lower memory.there is some on ebay MCM4116BP20 can i mix these with tms ones or …
... ]but shirley that's still two orders of magnitude faster than ... of 285ns [0]. To be two orders of magnitude faster, you ... cycle is, however, 1.5 T-states - the M1 instruction fetch read ... -
memory chips spectrum +Hi with regards to memory chips the ones in there are tms4116 in the lower memory.there is some on ebay MCM4116BP20 can i mix these with tms ones or …
... of 285ns [0]. To be two orders of magnitude faster, you ... cycle is, however, 1.5 T-states - the M1 instruction fetch read ... -
Bit functions speedI just stared nonplussed at the documentation for the bit functions. Apparently, if you're using the accumulator, using AND and OR is faster than se…
... imm, OR imm take 7 T states, if this documentation is right ... (4 cycles to fetch) to two bytes (8 cycles to fetch ... /> The one tip I didn't figure out for myself (and ... -
Bit functions speedI just stared nonplussed at the documentation for the bit functions. Apparently, if you're using the accumulator, using AND and OR is faster than se…
... .[/QUOTE]
RRA
Operation The contents of A are ... C.
T States 4
RR reg8
Operation The contents ... /> See instruction for C
T States 8 or 15 (HL)
Please test my Manic Miner remake!Thanks to everyone who downloaded my sneak preview of Manic Miner Turbo. Thanks especially to na_th_an who is the only person so far to give feedback…
... works just fine! I don't like using back buffers and ... can chop off a few t-states for you, if you like ... which I could right to per interrupt (less, because I had ...PT3 playerHello, I need fast PT3 player. Can anyone advice if there is anything better than built in routine from VortexTracker? BTW, I am having issues with…
... players (called 'standart') up to two times (peak load). No exact ... 1742 bytes long, 5440 T-states overage, 8864 T-states in peak. Player from ... for some certain module), 9256 T max, and average is 5500 ... format with < 4000 T average time, and slowest player ...Real Spectrum screen flicker with SCREEN$I've written a basic loader to simply do a 'load "" screen$' based video from a divide+ however I'm finding the Spectrum can't render a screens and a…
... raster and wait around 15000 T states for the raster to pass ... raster. This will give almost two frames to complete the buffer ...Castlevania ZXDoes anybody know what happened to the Castlevania ZX project? Yet again another great game that missed the Spectrum but had a port on the C64 [url…
I talk whit Radastan two years ago.
I ... .
I don't think Radastan abandon the project ... medium time of 102.5 T-States.
The ZX-Castlevania ... i don't know the real state of ... project, and i don't talk with he about the ...PT3 playerHello, I need fast PT3 player. Can anyone advice if there is anything better than built in routine from VortexTracker? BTW, I am having issues with…
... second,and count down the t-states of one frame, but increace ... a variant of mix this two feature. I planed to play ...Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…
... a ; 7 T
inc bc ; 6 T
jr loop ... ; 12 T
; 25 T-states in ... two passes of the loop will take (24+32) = 56 T-states, ... as opposed to 50 T for non-contended ...New Game: Heart StealerMy first platformer is finally released! Having a Speccy since a long time ago, I've really wanted to make a game for it. Since february, I've final…
... Note that this obviously doesn't apply to sound/music ... the skills involved aren't transferrable to modern environments ... tasks.
Counting T-states, producing uber-optimised, self-modifying ... teaching youngsters a lesson or two?[/QUOTE]
I was ...A question about M1 cyclesI'm writing an interrupt routine that, after the usual register pushes, will jump to a location of my choice with a [b]JP (IY)[/b] instruction. If I…
... an atomic operation. The interrupt signal is asserted for 32 T-states.
T Edit: 7 T
ei ; 4 T
nop ; 4 T
Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …
... two songs. These each cause slight variations in the number of T states ...Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …
... two songs. These each cause slight variations in the number of T states ...Mr Do! ?Not exactly a new idea (at least twenty-seven years old now :-o), but how about a port of Mr Do! to the Spectrum? There was never an official one, ev…
... I can even get the two-channel arcade music on a ... operands) take 4 T-states in uncontended time, 8 T-states when contended. The ... . Better still, 4 T-state instructions aren't affected by I-register ... 16K.
I didn't want to mention this right ...Mr Do! ?Not exactly a new idea (at least twenty-seven years old now :-o), but how about a port of Mr Do! to the Spectrum? There was never an official one, ev…
... I can even get the two-channel arcade music on a ... operands) take 4 T-states in uncontended time, 8 T-states when contended. The ... . Better still, 4 T-state instructions aren't affected by I-register ... 16K.
I didn't want to mention this right ...Z80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…
... 192 :razz: The picture under "Operation:" and flag effects say everything ... contains a breakdown of instruction T-states into machine cycles, the kind ... are for, so you don't have to remember everything.
Pretty CrashesTo make a 48K spectrum crash spectacularly and beautifully enter the following into basic. Also works on a 128k in 48k mode though not quite as prett…
... is that the author didn't fully understand what it does ... to execute this instruction is two
more than the normal ...
CPU automatically adds two wait states to an Interrupt response cycle ...
