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Machine code optimisationI'm geting back into z80 coding and wonder what the best way of showing how efficient the code is. I've got Rodney Zaks book and see there are timin…
... the time taken for the processor's clock to 'tick' once ... the time taken for the processor to execute an action. So ... times for each of the processor actions required to complete it ... by the CPU speed (3.54mHz for the Spectrum). Comparing the data ... -
SE BasicAfter 13 years of development I thought I'd run out of things to optimize, but it turns out I was wrong. However, I'm now running out of time to work…
... file includes X80 virtual co-processor definitions.
[*]AY silenced on ... ; Steve Vickers, who wrote the Spectrum ROM.
[*]Built-in support ... 0 mode.
[*]Optimized for speed.
[*]OVER support in 80 ... -
Timex 2068 hi-color / hi-res modes.Hello. I know this is not a Timex forum but since it is a very close relative of the Speccy I thought I'd ask my question here. Does anyone know …
... CP/M implementations. MSCRIPT (word processor) comes to mind.
spectrum display so I just wanted ... able to emulate at full speed. At that time, it was ... to the same demos under spectrum display file mode. It looks ... -
Sierra AGII've been thinking recently about starting a project to port Sierra's AGI engine to the ZX Spectrum 128. I've been reading the AGI specs and to me i…
... a lot of memory and processor power (as for the 80ties ... BASIC and we know the speed of Spectrum BASIC ;)
[COLOR ... some of these games for Spectrum from scratch ;) -
FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
... using IF1 and Standard ZX Spectrum 48 Kb /no additional hardware ... fixed the troubles with high speed communication.
The trouble ... is that this speed is on the edge of ... instructions per bit. So no processor time is thrown away just ... -
New bicolour game: El Stompo.Phew! Finally finished my first game using Einar's fantastic Nirvana engine. [B]El Stompo.[/B] [IMG]http://i1142.photobucket.com/albums/n608/davey…
... . The difference is, with the Spectrum's cell-attribute (rather than ... ate up every scrap of processor time.
It developed ... proper graphics output chip, the processor spends most of its time ... speed on a ZX81, you could do it on the ZX-Spectrum ... -
Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…
... back those delays to the processor via the edge connector so ... operate at normal speed?
If the Spectrum's ROM routines ... -
Chloe 280SEHi all, Could somebody tell me how far this project is to being complete? [url]https://github.com/cheveron/sebasic4/wiki/Chloe-280SE[/url] Im ver…
... by the X80 Math Co-Processor.[/quote]
Unfortunately the FPGA ... enough to support the co-processor. However, the ZX-Uno has ... would run at the same speed. The most obvious improvement would ... chart to compare the original Spectrum to this clone?[/QUOTE]
Why are rotozoomers on C=64 so fast ?Hi, I noticed rotozoomers on C64 are really fast. I'm not the best coder on Speccy but I know my pet I never succeed to do rotozoomer (or rotating ch…
... clash would have enabled the Spectrum 128 to have isometric ... the C64, whereas the Spectrum 128 was basically the 48K ... enough to actually make the speed increase an advantage), with ... some sort of Spectrum compatibility (Z80 add-on processor).
...What if Sinclair had released a 16 bit Spectrum?Had Sir Clive not wasted his companies money on the white elephant that was the C5 and instead focused on competing with his rival computer manufactu…
... hardware, it's the cpu speed to display file size ratio ... sales. The spectrum accidentally had enough of a cpu speed to display ... game software that kept the spectrum going long after its ... My spectrum (a ts2068) lasted a long time. Disk drive + word processor ...Face-Off: ZX Spectrum vs. Commodore 64I found an old oldish, but very informed and interesting article on the ole Spectrum vs. Commodore 64 argument. The article explains the technical d…
... is little choice because the processor is too slow to adequately ... smooth scroll and when the spectrum attains 25fps there are ... The cpu speed to display file size ratio the spectrum got is ... related to gaming (ie the spectrum's intended market).
...Please explain Spectrum FPGA-clones to meI've been using the great ZXDS-emulator on the DS XL so far, which is great. But I kinda missed toying around with hardware. I've tried bidding on a …
... a description. There's no processor inside the FPGA to "run ... piece of code from a Spectrum emulator could look like this ...Speccy Vs Amstrad CPC Vs C64I hope no one minds me posting this here as well as in the announcements section. I'll delete it if there is a problem. It's childish fun but can I …
... down to this.
Spectrum advantages
1. Brighter colours ... sharper display
2. Faster processor, better for wireframe 3D
speed issues)
6. Action Replay ... and jerky scrolling of the Spectrum.Speccy Vs Amstrad CPC Vs C64I hope no one minds me posting this here as well as in the announcements section. I'll delete it if there is a problem. It's childish fun but can I …
... with the impression that the Spectrum's graphics truly were a ... . If anyone said here that Spectrum graphics mode was a subset ... this way but the speed of the processor at this point comes ... where credits due" thing, the Spectrum version of Extreme just looks ...Speccy Vs Amstrad CPC Vs C64I hope no one minds me posting this here as well as in the announcements section. I'll delete it if there is a problem. It's childish fun but can I …
... to clock the processor to be equivalent to the Spectrum's 3 ... ), then you would have the speed too.
Also, ... very evident capabilities as a Spectrum programmer, Buzzsaw was something else ... can display spectrum hi-res mode but main processor can't ...ZXMAK2Hi everyone, I'm glad to present you the latest version of my emulator - ZXMAK2 :) There are a lot of changes were made since the last topic about t…
... components to make your own spectrum machine :)
[IMG] ... buttons;
[*] Maximum Speed button that allows to run ... at the maximum speed with no affect on ... modern multi-core processor. On the old single processor VBlank sync works ...IN and OUT in hardware terms... what are 'ports'?Hi all, I understand PEEK and POKE, but have never managed to get my head around IN and OUT. The books all go on about how they read from and wri…
... /> [quote]
Yep, although the Spectrum’s I/O contention makes ... tied directly to memory speed and memory speed fell behind cpu ... is more decoupled from memory speed but it too faced ... will take to complete. Any processor with virtual memory is unsuitable ...Monkey Island On Speccy...I would love to see Monkey Island on the speccy...think it can be done...not as much detail or graphics...but along the same story lines.... What ot…
... /> I don't know about speed, but a PC XT is ... board with it's own processor.
So my [u][b ... will be faster than a Spectrum.
Anyway, the only ...Wolfenstein 3D is finally fun!Alright, so Wolfenstein 3D is still popular with some people, and was very popular and innovative when it appeared, but I played it after I played Do…
... were running on the 060 processor, the 603PPC was sitting there ... then it showed the true speed of Doom and Quake over ... would love to know what processor and graphic card these Amigas ... PC and back to the Spectrum.Best place to start learning assembly on WOS ?So I'm pretty new at this forum but not the Speccy so my BASIC is pretty good. I can see lots of resources on WOS for doing machine code/assembly but…
... a Z80 processor running at half the speed of a Spectrum, it more ...What should your speccy have come with ?:) I was thinking about this earlier. What changes should of been made to the Speccy when you purchased yours ? Realistically this topic really…
... /> - X80 Floating Point Maths Co-Processor
The X80 ... for recompiling and will speed up calculations for greater ... With its function being to speed up memory transfers. This ... increases performance for the spectrum with most operations including ...ZX Spectrum Next Kickstarter Launchedhttps://www.kickstarter.com/projects/1835143999/zx-spectrum-next
... system beside Spectrum and calling it a Spectrum enhancement won' ... does not improve on memory speed - the graphics still have ... Next still has a slow processor and a limited number ... it must be spectrum compatible, it must allow spectrum peripherals to be ...ZX Spectrum Next Kickstarter Launchedhttps://www.kickstarter.com/projects/1835143999/zx-spectrum-next
... does not improve on memory speed - the graphics still have ... Next still has a slow processor and a limited number of ... it must be spectrum compatible, it must allow spectrum peripherals to be ... reality things completely alien to Spectrum ways could be considered ...What is the maximum fps the spectrum can achieve?I have been doing some reading and from what I understand the Spectrum outputs a PAL signal, but that means it will display @50fps or @25fps? If t…
... same time as emulating the Spectrum.
But, the ... the former with a faster processor, everything becomes smoother but the ... plays out at the same speed (because those interrupts are ... move around at an increased speed and the game becomes unplayable ...Gandalf - A ZX Spectrum platformer that looks rather nice indeed![img]https://1.bp.blogspot.com/-BuVmuvmRXfg/WYhRw0z0lMI/AAAAAAAAisA/LFKD4SipiSkm3x0FsCNjJCRsCnHgE6W6gCLcBGAs/s640/GandalfZX.jpg[/img] [quote]As ma…
... up 62% of the processor's time. It has ... screens as it keep the processor so busy. Loading requires ... buffer in high memory (for speed of access). For bi- ... the first line of the Spectrum's pixel display before ... than 20% of the normal processor run-time, so your ...Microdrive logic flow.Hi all, I've finally gotten my hands on an Interface 1 and Microdrive to continue my project, and have been analyzing the Microdrive with a logic …
... 's as fast as the Spectrum can transfer data.
... arduino was attached to the Spectrum through some logic that ... Interface1 and have an external processor both accessing microdrives and ... an Interface1 that handles high speed media, and old microdrives. ...Why not more interest in C?Just curious. Not trying to provoke anything other than a discussion here. It would seem (to me) that it would be better for "Z80 beginners" to wr…
... target (e.g. a ZX Spectrum) would be C, probably because ... of a particular processor or refining something for absolute speed; maintenance, portability ...Were the full Sinclair Loki specs ever actually known?I was just curious. A lot was leaked to the media, but the exact specs seem different depending on source. Some say it could support up to 512x256 an…
...
Mapping? Unknown, but Spectrum Compatible and CPM compatible.
256*192*(8x8attrib) - Spectrum Compatible.
256*200*RGBI ... ROM.
Did NOT support Spectrum 128 ROM.
speed stuff, and maybe a slave processor for ...More "What could have been"... The Z280.So in chasing up the Loki specs, I happened upon some parallel developments... And had Sinclair gotten to make the Loki, there could have been some i…
... any idea what a z280 processor cost around 1986/87?< ... have used the extra speed and extra graphics capabilities ... backward compatibility with the original Spectrum... Basic games would still ...
Had the Spectrum continued with Sinclair, Had the ...More "What could have been"... The Z280.So in chasing up the Loki specs, I happened upon some parallel developments... And had Sinclair gotten to make the Loki, there could have been some i…
... />
Slot 1) Main Processor ( z80, z180, z280 or MC68008 ...
Slot 2) Second Processor Slot, so it could run ... path, utilizing the full internal Spectrum architecture, with promises of ... made a difference - high speed scroll, and 8-bit shifts ...
