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Pentagon RAM memoryDoes anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ? Looking at schematics it …
Does anybody know or have reference to technical docs, how no contention on RAM access is achieved in Pentagon 128K clone ?
Looking at schematics it has to be simple solution, probably king of interleaving, but I could not find any details. -
Zero 0.5 ReleasedAfter a bit of a hiatus, the next update of Zero is now available [URL="www.ramtop.wordpress.com"]here[/URL]. Feedback and bug-reports appreciated! …
... opcodes (Woody).
- Fixed IN contention (Woody).
- Fixed ULA PLus ... -
Timing in loading routinesJust for curiosity I have done some experiments with SAVE command in accurate emulators, and then analyzing the generated WAV and I have obtained lit…
... don't take account the contention. There are two instruction with ... contention, OUT (FE),A that affects ... compared with the teorical (without contention) values. If we take the ... -
Contended Memory woes...Hello All, An iccle problem I have and was hoping one of you fine WoSers could bail me out again... :) I've noticed that my emulator is running sli…
... .org/faq/reference/48kreference.htm#Contention[/url]
I implemented ... -
Where do you stick the stack?...OK, so I've got a fair chunk of ASM code assembled from 24000 mark. The stack shouldn't get very big, just a few PUSHes and POPs of the main regis…
... in RAM (does lower RAM contention affect it a great deal ... -
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 "…
... possible, without checking where the contention delays fall - and failed ... our PUSHes to minimise contention, so we probably need ... different point in the contention pattern, we'll need ... graphical representation of where the contention delays fall, so that ... -
Nasty 'Gotcha' for multicolour timingI thought I would be better developing my multicolour routine on the 48K first, being the slowest, so it would then be sure to work on the 128K varia…
... hit all the most awkward contention.[/QUOTE]
I think I ... these back-to-back in contention, the delay from the end ... cycles (extended to 16 by contention). But then I should probably ... , to get ahead on the contention cycle. Assuming that writing those ... -
Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…
... the Z80. It fixes a contention problem (basically all I/O ... (well, now with incorrect IO contention due to the absence of ... -
Using even ports for input?I've been looking for unused ports to use with my clashbasher interface. I understand that the spectrum only considers A0 when decoding its input p…
... /> There shouldn't be any contention on the bus because that ... damage to my spectrum through contention on the data bus? Are ... -
ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…
... ), and it doesn't apply contention to take precedence as usual ... -
I dusted my Timex Sinclair 2068 :)Finally I dusted my TIMEX SINCLAIR 2068. It is a very rare ZX Spectrum 48K clone, coming from America. [img]http://mister_beep.republika.pl/ts2068.…
... could swear there were no ?contention? ugly effects in Qchan and ... -
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, …
... % right. We know when the contention pattern starts, but I have ... -
Timex contended memory timings, the TS2068 kludge board and EXROM at $4000 - $7FFFI haven't seen this documented anywhere yet so I thought I'd share my findings. I've been investigating contended memory timings on the Timex Sinclai…
... Timex SCLD still applies memory contention at these locations when the ... port F4 when applying memory contention; contention is applied whether the CPU ... there to fix I/O contention.
Timex SCLDs ... have the fixed I/O contention of the 5C112E and the ... -
HDMI generation by cloning video ram(coming from [url]http://www.worldofspectrum.org/forums/showthread.php?p=768257&posted=1#post768257[/url]). A thing I was brainstorming about.. Why …
... , no video ram reading and contention problems.
Simply a transparant ... -
Zero 0.7 / Zero 0.6.5 releasedAfter months of grueling work, I?m proud to announce the Vanilla version of Zero, which is a regular Windows version of the emulator. I?ve tried to m…
Fuse tests - INC BC causes contention delayHi all, In the FUSE test suite it has the following for the output of opCode 0x3 (INC BC): 0 MC 0000 4 MR 0000 03 4 MC 0001 …
Hi all,
In the FUSE test suite it has the following for the output of opCode 0x3 (INC BC):
0 MC 0000
4 MR 0000 03
4 MC 0001
5 MC 0001
Where this is defined by:
...No contended memory?Sorry if this is a stupid question. But I'm trying to learn more about the ZX Spectrum. If I had a stock 48k Speccy and I could wave a magic wa…
... wand to remove the memory contention, what software would break?
TommyGun with Debugginghttp://goo.gl/HfSXev?gdriveurl Ok, so this is a pretty big release for me and I have added a lot of stuff into the code editor. Mainly of course …
... .
Does not have memory contention.
Does not have sound ...POKE taking a variable amount of time...Hi Folks, Does anyone know why the following POKE statements seem to vary in their execution time? [code]100 POKE 60000,10 110 POKE 60001,16…
... something to do with memory contention? Although address 60000 is outside ...ZXDS 1.3.4Hello, to celebrate the 35th Spectrum (and 10th ZXDS) anniversary, I have prepared [url="http://zxds.raxoft.cz/"]new ZXDS release[/url]. It fixes …
... fixes just one very subtle contention bug in HALT emulation, which ...Fuse 1.4.1 releasedA new release of Fuse, the Free Unix Spectrum Emulator, is now available at the SourceForge project: https://sourceforge.net/projects/fuse-emulato…
... 0x1ffd and 0x7ffd
[*] Set contention for DivIDE/DivMMC EPROM memory ...Fuse for macOS 1.4.1 ReleasedA new version of Fuse for macOS has been released at the dedicated sourceforge project: https://sourceforge.net/projects/fuse-for-macosx/ Note …
... Meunier) (Sergio Baldoví).
[*] Set contention for DivIDE/DivMMC EPROM memory ...A Yankee in IraqI'm testing the game on the zx next and it currently hangs right after the game starts no matter what timing regimen and contention pattern is chosen…
... matter what timing regimen and contention pattern is chosen (48k, 128k ... it measuring frame length or contention pattern?
I know ...zx spectrum 48k issue 6A boot fail- black paperohh whats wrong with this poor specie .. boot fail,, border white & paper black .. when reset it shows the red lines to indicate that the CPU is cycl…
... the ram passes.. but the contention test fails, the interrupt test ...Zero v0.8Pigs can apparently fly because it's the v0.8 update of Zero that no one asked for but is out for public consumption anyway. Grab it [url="https:/…
... behaviour (ZJoyKiller).
- Fixed +3 contention bug (woody)
- Fixed mic ... mode (Hexaae).
- Fixed +3 contention bug (woody)
- Fixed issue ...Are 128K games more likely to crash than 48K ones?Hey, guys. I've been doing some experimenting with various games and even some music demos and apps, and I'm beginning to reach a conclusion that …
... am aware of the memory contention issues between the Sinclair 128K ...
