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Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... ?
Contention on Spectrum 48K with "normal" timing should start at ... ]
Contention on Spectrum 128K with "normal" timing should start at ... ]
Contention on Spectrum 128K with "late" timing should start at ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... ?
Contention on Spectrum 48K with "normal" timing should start at ... least one cycle later). As contention is ULA related thing and ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... doubt it emulates all the timing faithfully.[/QUOTE]
You ... . It doesn't emulate memory contention at all, even for the ... -
Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…
... 14335[/B]. The instruction timing table indicates this instruction ... is affected again by contention. Since we are now ... to avoid the first contention (related to instruction location ... instructions are affected by contention from referenced address more ... -
20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…
... out all the kinks in timing coming from a delayed interrupt ... ] at the end of the contention period on each raster scan ... -
ULAs interchangeable across issuesHi all, Now that I'm retired, I'm looking again at 8 bit computing :) I'm attempting to revive a spectrum 48K. I'm going to swap chips in/out from…
... ULA. This is due to timing changes introduced on that board ... there to fix overly aggressive contention when accessing I/O ports ... -
Hardware description - MB-02+ interfaceOn this thread will soon released info about MB-02+ idisk interface ( memory paging mechanism, list of ports, addressing, MB IDE, schematics, etc... …
... signal as main Z80CPU. But timing of reading/writing bytes is ... /+3 ULA use different memory contention)
[B][U]Port ... -
Border art viewerRecently, we were working with diver/4d on border art. The idea was to push the techniques of drawing on the border to the limit and to see, how much…
... does not provide accurate Timex timing. Use FUSE instead.[/QUOTE]
contention pattern on TC2048 and TC2068 ... unsurprisingly different, and since my contention test depends on the frame ... -
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…
... /> I don't calculate. For timing critical stuff I just take ... and BorderTrix both rely on contention to smooth out any kinks ... -
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…
... they work. The actual contention can help with doing the ... both branches must have identical timing. Anything you do optimally in ... after each statement with its timing, then note the total ... command sequences synchronise with the contention system (e.g. back- ... -
ANN: Spud v0.230Ok, another new Spud... [URL="http://bit.ly/16OFkuQ"][COLOR=#0066cc]http://bit.ly/16OFkuQ[/COLOR][/URL] [quote] v0.230 ADDED: Options. When selec…
... and Debugger windows.
3) Contention timings are a bit off ... 't work correctly.
4) Timing for the 48k model is ... ://www.zxspectrum4.net/downloads/timing_tests/"]Timing Test suite[/URL].
5 ... -
LOOK at the size of my Rom/EmulatorOk, we have 16k, 48k, 128k, even a 256 odd k Rom/Emulator But I want more :p Is there anything out there now or been worked on to give more, as the…
... infamous doohickie referred to as [timing] "contention" all aboot, eh?
Can contention be done away with in ... -
LOOK at the size of my Rom/EmulatorOk, we have 16k, 48k, 128k, even a 256 odd k Rom/Emulator But I want more :p Is there anything out there now or been worked on to give more, as the…
... infamous doohickie referred to as [timing] "contention" all aboot, eh?
... hardware).
Can contention be done away with in ... for you)
Contention is due to the fact ... emulators can do away with contention, in fact most emulators ( ... -
Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…
... now you should only run timing critical code in uncontended RAM ... a block of bytes outside contention, use [B]LDI[/B]. If ... -
Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…
... now you should only run timing critical code in uncontended RAM ... , you have missed the point. Contention doesn't depend only on ... -
NEW GAME: Elixir VitaeOnly 2 weeks after Janosik I have a pleasure to announce my next creation - a logical minigame called [B]Elixir Vitae[/B]. Just like another Polish …
... awkward it even throws up timing differences between the 128K and ... hit all the most awkward contention. -
NEW GAME: Elixir VitaeOnly 2 weeks after Janosik I have a pleasure to announce my next creation - a logical minigame called [B]Elixir Vitae[/B]. Just like another Polish …
... awkward it even throws up timing differences between the 128K and ... hit all the most awkward contention.[/QUOTE]
If you ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... of OUT instructions.
Contention is also a factor; if ... fiddle with it during a timing-critical operation like tape loading ... -
Two more faulty onesCould I get your opinion on these two faults, please? Understanding these two cases would be very beneficial for my ZX education. Thanks! - A Spectr…
... up the earlier I/O contention fixes that had been applied ... 5C112E ULA and altered the timing of the colour burst component ... -
A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... in NIRVANA, because lack of contention affects timing (it runs faster during ... -
48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …
... boards. Have a I/O contention fault that necessitates the 'dead ... power version, alters colour burst timing for increased compatibility with certain ... these boards rely on the timing changes incorporated into the 6C001E ... -
New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …
... if you could run the timing.tap test from [URL="http ... we at least got the contention pattern right, as it seems ... -
New test for finding missing +2A/+3 ULA timing detailsHello, having added the +2A/+3 emulation recently, I want to make sure I got the ULA timing 100% right. We know when the contention pattern starts, …
... may be due to subtle timing differences, or because the +3 ... not really needed for the contention, it is perhaps just an ... -
48k+ ULA'sI've got three ULA's here that only work in certain boards. Thought I was going nuts, swapping, changing stuff around. But hey, I've got two working …
... boards. Have a I/O contention fault that necessitates the 'dead ... power version, alters colour burst timing for increased compatibility with certain ... these boards rely on the timing changes incorporated into the 6C001E ... -
Help with 1-bit sampled soundHi all, I've been sent over this way from the CPC Wiki forums as you guys may be able to help me more specifically with a programming query. Firstly…
... =utz;759691]I/O port contention maybe? See [URL="http://www ... /43/beeper-music-and-io-contention-on-zx-spectrums-48k128k2/"]here ... lazy in timing but at least the inner loop is contention proof ... -
New bicolour game coming very soon.And they say budget software houses can't afford to advertise :-D [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/elstompo_advertsmall_…
... NIRVANA, because lack of contention affects timing (it runs faster during ... for ZX-Spectrum models use contention to "re-synchronize" with ... since there's no contention that could be used ... re-synchronization". Luckily, lack of contention makes it run faster, so ... -
A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... rendering, according to the specific timing characteristics of each machine; or ... bit[/I] different in its contention so it might even be ... -
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…
... then the only requisite for timing would be that the vertical ... of the ROM. Could read contention be avoided, such that the ...
