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Which is the most technically accurate Spectrum Emulator?Ok, which is the most technically accurate Spectrum Emulator? Please don't just vote but give reasons why.
... />
Also passes your IR contention in 48k mode.
Edit ... me that it's his test, not yours. Sorry. Woody also ... -
Which is the most technically accurate Spectrum Emulator?Ok, which is the most technically accurate Spectrum Emulator? Please don't just vote but give reasons why.
... 's test reads from the ROM, and expects the real 48K ROM ... .
[quote]"High port contention 2". I need to keep ... -
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…
... too? And other emulated machines (48K, 128K, +2)?
[QUOTE ... timing profiles:
1. 48K Spectrum
2. 128K / +2 ... each line, allowing for some contention. The Pentagon version takes exactly ... 'm using ZX SPIN to test this, and so far it ... -
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…
... test on a 48K 6C ULA for comparison?
The contention ... operational behaviour compares to the 48K machine.
Question. ... MREQ going low latches the contention state until the end ... of the contention period - which suggests it ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... and perhaps the contention pattern (although contention detection didn't ... />
[*] The remaining test programs from [URL="http://wizard ... to contention, but everything else should work just fine. This test ... an emulator in Spectrum 48K mode.[/I] -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... this is not a test specifically about contention, in practice it gives ... ] using either a TK90X or 48K ROM. In this case, the ... Spectrum 128K (with TK90X or 48K ROM) and a real TK90X ... a TK90X with a Spectrum 48K ROM;
[*] Flavio ... -
Spectrum +2 EPROM in Spectrum +2AHi, My friend Marc bought a +2A from Tim Abbott at the Spectrum 30 event. Back in the day there were companies selling +2 ROMs to put into +2As to r…
... GAL unrainer that alters memory contention and my DivIDe is ... 128k menu, nmi resets to 48k, press the nmi again ... 128k menu, nmi resets to 48k, press the nmi again ... menu, nmi resets to 48k, press the nmi again ... the case) and try the test again. I've noticed ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... which goes away during contention periods - and therefore ... composite video (only the 48K has composite video available ... a test that simulates ZX contention, then go and test the ... only works on a 48K machine - it needs ... RGB out on a 48K machine, in other words ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... which goes away during contention periods - and therefore ... composite video (only the 48K has composite video available ... a test that simulates ZX contention, then go and test the ... only works on a 48K machine - it needs ... RGB out on a 48K machine, in other words ... -
Revisiting Spectrum CPU clock regenerationWarning: This post will be a bit nerdy :-) Some time ago, I experimented with phase locked loop circuits as a possible way to regenerate the Spectru…
... !) it was time to test it on the real hardware ... connected is an issue 4S 48K model, it's at ... make a good amount of contention, I just entered the ... two bouts of 6 cycle contention. The Spectrum clock, after ... clock despite a lot of contention going on. (As you ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... )
FUSETEST reports a contention offset of 9 instead of ... ]
This is another test I cannot remember the name ... ) at 0x3800. Spectaculator shows me contention at one cycle before
48K, but it seems to use ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... and RUN for each next test.
The infinite loop ... there to check for possible contention fluctuations, but it hardly applies ... values there correspond to standard 48k and 128k time offsets shortly ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... and RUN for each next test.
The infinite loop ... there to check for possible contention fluctuations, but it hardly applies ... values there correspond to standard 48k and 128k time offsets shortly ... .com.br/2013/04/timing-test.html]blog[/url].
< ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... /> Ops! It seems this test is reporting contentions with a ... br />
Contention on Spectrum 48K with "normal" timing ... Contention on Spectrum +3 should start at cycle 14361 but this test ... /> Fortunately, even if this test is not reporting results correctly ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... ;692763]Ops! It seems this test is reporting contentions with a ... missing something?
Contention on Spectrum 48K with "normal" timing should ... /> [/QUOTE]
Yes, this test counts frame cycles from the ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... 't emulate memory contention at all, even for the 48K.
48K Spectrum (apparently sold in Chile ... ), or specially produced test snapshots. An obvious test would be to dump ... -
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…
OK, let's test this. Suppose we are ...
tacts, lost due to contention in sp-1 -> tacts ... , lost due to contention in sp-2 -> overall ... the full output. On 48k computer this means that the ... = 2.6 tacts of contention delays in average (when using ... -
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…
... introspec;707424]OK, let's test this. Suppose we are executing ... the first PUSH executed during contention. After this, the exact ... the full output. On 48k computer this means that the ... rough estimate, because the actual contention delay is deterministic and it ... -
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 "…
... owing to the I/O contention.[/QUOTE]
The number ... line (224T for a Spectrum 48K, 228T for others).
contention will make the same routine ... will need some time to test everything properly... -
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, …
... is 32 in case of 48K ULA, but I have seen ... ptime version with the 128k contention change added? The tap should ... this, other than that the test loop must have become misaligned ... interrupt and thus skewed by contention for some other reason (for ... -
Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…
... , and if the CPU enters contention, the ULA halts its clock ... the above mentioned contention.
A quick test: if your Spectrum ... (provided that you have a 48K machine and you haven't ... -
Timing_Tests-48k_v1.0 results...Hello All, I ran these [URL="http://www.zxspectrum4.net/op_timing.php"]tests[/URL] on my emulator and some of the tests failed.. so I tried it on a …
... tests. Well, it passes test 35 as long as ULA ... spent on figuring out the contention details [URL="http://www.worldofspectrum ... believe the point is to test the contention timing, not the emulation ... results are for a bare 48k spectrum with no peripherals attached ... -
Timing_Tests-48k_v1.0 results...Hello All, I ran these [URL="http://www.zxspectrum4.net/op_timing.php"]tests[/URL] on my emulator and some of the tests failed.. so I tried it on a …
... results are for a bare 48k spectrum with no peripherals attached ... then perhaps have one additional test for IN/OUT added which ... useful if a test which is supposed to test contention requires getting floating ... tests don't depend on contention, too. Or that a ... -
So tell me (in English) about πBacteriaI read a tantalizing snippet on another thread about something called 'πBacteria'. It seems that this tiny piece of software is a bare-metal Spe…
... 's a rubber 48K emulator, not AY, not contention, not any kind ... ". I plan to mount and test it with the emulator. Sorry ... -
assembler for PcHi guys, I'm in the process of teaching myself machine code, and wondered if there is a good pc program for writing code. Or is the best thing to use…
... the compiled .TAP file, to test it.
You can ... /> Now this is just for 48K development. For 128K you're ... can start with a standard 48K loader, but then you're ... /> Look to the ZX-Modules suite of tools for the best ... -
Vega ARM SOC?I read that the core of the new Vega was an ARM SOC. I thought it would have been an FPGA. But it seems it's an ARM running an emulator. Anyone kn…
... />
A quick and dirty test of such a program with ... file to load into your 48K Spectrum or emulator):
contention
ld a,81h ... -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... 14365 and the contention scheme is different from the 48K (and I ... . :)
As for the test, I think we're pretty ... in the test results. Here, I'm only using the contention to ... original Spectrum machines. The actual test, like the port reading and ... -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... ="Hikaru;921353"]Looking at your test, it seems like you might ... />
[quote="Hikaru;921353"]Memory contention has literally nothing to do ... an interesting relationship. For the 48K/128K machines, I use a ... -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... 921357"][quote="Hikaru;921353"]Memory contention has literally nothing to ... an interesting relationship. For the 48K/128K machines, I use ... . Yes, the I/O contention works wonders when it comes ... [/quote]Hm, I ran your test with the tape acceleration enabeld ... -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... long run without I/O contention.[/quote]
Right. ... from writing a meticulously calculated test program (or, indeed, and ... Of course, port contention (and memory contention if such instructions are ... , nor the “standard” 48K/128K/+2 behavior should lend ...
