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another c64 vs. Speccy site...[url]http://c64vsspectrum.com/[/url] 25 years and we are still brawling.. ;)
... br />
There's 224 T-states per scanline, so by the rough back ... envelope calculation, something like 7 T-states per 8 pixel long memory cell ... wouldn't be able to access lower RAM while the scanline ... takes 3 T-states, and there wouldn't be 1 T-state to ... -
What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... MHz and there are 228 t-states per scanline.
[QUOTE=csmith;583148 ... with the start of the scanline?[/quote]
I will have ... is "btime" test? I couldn't find it in the fusetest ... -
BorderTron 3000A little bit of speccy-related fun for a Friday afternoon... I've knocked together a program for Windows which I've called Bordertron 3000 (a suitabl…
... )...
[/QUOTE]
Yes, 14336 T-states make up the top bit ... the 128, there are 228 T-states per scanline rather than the 224 of ... from the end of a scanline to somewhere in the middle ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... There are 228 T-states per scanline.
[*] The scanline timing is at ... screen is displayed 8762 T-states after the interrupt occurs ... 8763, 8764 or 8765 T-states have passed since interrupt.
T-states on the Spectrum 48K ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... [*] There are 228 T-states per scanline.
[*] The scanline timing is at ... least 20 T for the left border, 128 T ... screen, at least 24 T for the right border, ... obtained frame duration of 59736 T-states. It means 59736/228 = ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... /> [*] There are 228 T-states per scanline.
[*] The scanline timing is at ... obtained frame duration of 59736 T-states. It means 59736/228 = 262 ... are 228 T-states per scanline.
[*] The scanline timing is 24 T for the ... -
XYZ - a multithreaded GUI operating system for SpeccyToday I'm re-starting my unfinished project. A few years ago I wrote the yx multitasking kernel (which includes RAM/ROM versions, threads, memory man…
... MHz.
There are 228 T-states per scanline, as opposed to 224.
There are 311 scanlines per frame, as opposed to 312 ... 14365, 14366, 14367 or 14368 T states have passed since interrupt. As ... means that there are 70908 T states per frame, and the '50 ... -
How many T-states takes PUSH DE ?Hi. Just a quick one. According to z80.info docs, a PUSH DE should take 11 T-States to be executed. But WHAT if SP is pointing to Contended Memory,…
... PUSH DE should take 11 T-States to be executed.
T states looks OK, but shouldn't it take longer ... interrupts disabled but that shouldn't change the fact that the ... />
I think this 11 T states info is normal situation and ... -
Scrolling loader counter in 85 T-States?Would it be possible to write a scrolling loader counter in 85 T-States? I have a custom screen load routine that loads attribute first, then the …
... scrolling loader counter in 85 T-States?
I have a ... scrolling load counter in 85 t-states. Should be possible to update ... stack useage. My loader doesn't touch the stack, no calls ... -
Spectrum 2-3 times more powerfull than MSX?![url]http://www.youtube.com/watch?v=2-kI0urN9tI#t=8m18s[/url]
... Hz smooth multiparallax scroll with per scanline attributes using little CPU (check ... has quite a lot less T-states per frame. That, along with the ... -
speccy 2020Yep, re-made speccy 2010 is ready.. it is called speccy 2020cr - soon preorder. small changes in design, big changes in layout :-) [IMG]http://mmj.p…
... ]Speccy 2020 (nor 2010) haven't the HDMI output.
states per scanline. I have sucessfully run Pentagon ... -
LDIR timings in contended RAM?The 48K Spectrum technical reference page ([URL="http://www.worldofspectrum.org/faq/reference/48kreference.htm"]here[/URL]) describes the detailed ti…
... cycle 3 will take 3 T-states to read the contents of ... ] gap in the ULA wait states before it can write to ... start either 7 or 8 T-states after M3: the Z80 must ... in the wait states, it will take 32 T-states per byte.
Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
... ld sp, ix ; 10 T
pop bc ; 10< ... ret
; Total = 148 T-states per iteration.[/code]
The ...
; Total = 138 T-states per iteration.[/code]
The ...Timing of Timex Computer 2068Is the timing of the Timex Computer 2068 fully documented yet? I have one here with the ZX Spectrum Emulator cartridge and have downloaded a few test…
... . There are 224 t-states per line and 312 lines per frame. The screen ... the data buses. I haven't checked if this is the ...Tinkering with DMASo, some afternoon tinkering... [img]http://photo.alioth.net/tmp/dma_small.jpg[/img] The purpose of this all is to see what's possible using the Xi…
... PUSH HL, which takes 11 T-states per two bytes.
With ... , this is reduced to 6 T-states per two bytes.
* ... memory timings would take 6 T-states per byte copied.
... which is something like 21 T-states per byte!
Also, ...Fixing a ZX Clone from .ru - 27 years late.Hi there, I've currently assembled another russian clone a "Compact 256 Turbo" from a PCB I bought. The machine appears to be fully functional and o…
... to be largely compatible (69888 T-States per INT, 295/312 Lines on ...ZX Spin 0.4 available for Download.Standard Cut-n-Paste from the CSS post: If all goes well, I'll upload it to WOS on monday. ----------------------------------------- Okay, it's th…
... are more interested in more T states per frame and hence less partially ... contended memory and processor wait states/clock halting.
Fraser ...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…
... L
saving another 4 T-states per run.
The POP ... 16 * 8 * 4 - 8 * 4 T States
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…
... L
saving another 4 T-states per run.
The POP ... 16 * 8 * 4 - 8 * 4 T States
[/quote]
I haven't tested the code, but HL ...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…
... save a significant number of T-States per cycle (given that indexing instructions ...Method to read byte as binary string rather than dec?Hi all Am fiddling around with the screen buffer and have written a routine to scan the screenbuffer into upper ram and then write it back in upside…
... :32, cyborg wrote:
Can't do that on a Spectrum ... data would take about 5000 T-States or so (clock cycles basically ... /> The ZX has approx 70000 T-States per frame, but this depends in ... would take about over 40000 T-States, and that's not taking ...AY tracker routineHi. Yesterday i played with some ay tracks and was surprised how big are tracker routines and music data (over 1.5KB for Pro Tracker routine and 4-6 …
... and less than a thousand t-states per interrupt.
On the ...Real 60Hz NTSC 48K ZX SpectrumNot a 3rd party mod. The joystick mod was added by the user, but the board and the computer is exactly what was sold in Chile, South America. We migh…
... convinced myself that it wouldn't work because the time measured ... we know the number of T-states per frame, then we can work ... know precisely how long a T-state is, given any arbitrary ...Real 60Hz NTSC 48K ZX SpectrumNot a 3rd party mod. The joystick mod was added by the user, but the board and the computer is exactly what was sold in Chile, South America. We migh…
... convinced myself that it wouldn't work because the time measured ... we know the number of T-states per frame, then we can work ... know precisely how long a T-state is, given any arbitrary ...The So What's This Buzzsaw All About Then? Thread.Erm. This: [URL="http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_1.tap"]http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_1.tap[/URL] Keys…
... tested under Fuse. Doesn't affect gameplay though.[/QUOTE]
T-states to copy each line, allowing ... Pentagon version takes exactly 224 T-states per line, without contention.
< ... be difficult if I can't reproduce the problem under ...The So What's This Buzzsaw All About Then? Thread.Erm. This: [URL="http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_1.tap"]http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_1.tap[/URL] Keys…
... of the code with 219 T-States per line, somewhere betweeen the 48k ...Where's the border line between a Spectrum and something else?I mean: there are purists out there that consider that anything that is not a true Sinclair Spectrum, with a true Z80 and a true ULA, and at most, 48…
...
Even 128K models aren't 100% compatible with 16/48K ... , floating bus, fixed number of T-states per line/frame, etc.)
< ... a Spectrum clone and don't take into account those singularities ... , many games won't work or will "stutter". ...Best Spectrum game from 2009Ok, its almost 2010, and we have to decide which was the best game this year :) Miles Mad Mission [url]http://www.worldofspectrum.org/infoseekid.cg…
... frame rate, thus having 'more' T-States per interrupt (71680). So, the software ... (demos, modern games), simply can't work properly on anything else ... .[/QUOTE]
You obviously haven't seen any real demos for ..."Programming the Spectrum in Assembly" series in Micro MartI see that Shaun Bebbington is starting a series of articles in Micro Mart magazine on how to program in assembly for those who might know a little b…
... 50.08 Hz, giving 69888 T-states per frame; the 128K runs at ... at 50.01Hz, giving 70908 T-states per frame - so in real terms ... for Double Dragon, I don't know...
