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Memory Map/ContentionHi I'm new to speccy coding (well I did some z80 coding a few years back - like 20yrs ago :) ), and I'd like to get back into writing some scrolling…
... a correct map for memory contention?
Address Size Area ... -
I/O contention model questionHi everyone, Sorry for my poor english. Together with a friend we are working on ZX Spectrum 48k implemented in FPGA. We have found bug in the Spect…
... .s faq describing I/O contention.
The 48k ... to lead to the following contention patterns:
High ... /> in 40 - 7F? | Low bit | Contention pattern
------------+---------+-------------------
No | Reset ... -
Tc2048In case any one is interested, I saw this on eBay [url]http://cgi.ebay.com/Timex-Computer-2048-TC2048-made-in-portugal-RARE_W0QQitemZ250124510994QQi…
In case any one is interested, I saw this on eBay
[url]http://cgi.ebay.com/Timex-Computer-2048-TC2048-made-in-portugal-RARE_W0QQitemZ250124510994QQihZ015QQcategoryZ1247QQssPageNameZWDVWQQrdZ1QQcmdZViewItem[/url] -
Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
... playing a bit with memory contention and floating bus stuff in ... sense it starts applying the contention a few cycles earlier, namely ... -
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…
... 0x7ffd, 0xbffd and 0x3ffd port contention behaviour.
... However, I find that contention is applied too often ... /> To correct the excessive contention, I replicated ULA14 and ULA15 ... someone describe accurately the contention behaviour for the 128K ... -
BIT b,(ii+n) contentionThe documentation says that BIT b,(ii+n) has this contention pattern: pc+1:4,pc+2:3,pc+3:3,pc+3:1 x 2,ii+n:3,ii+n:1 See [url]http://scratchpad.wiki…
... b,(ii+n) has this contention pattern:
pc+1 ... Tstate.
So the contention pattern should be:
TC2048 Power SupplyDoes anyone know what power supply specs TC2048 need? I found them once, but I can't seem to locate them any more. My TC2048 is outputting a lovely r…
... know what power supply specs TC2048 need? I found them once ... locate them any more. My TC2048 is outputting a lovely rainbow ...Timex Compute TC2048 loading problems solvedHi everybody, I've just finally fixed a TC2048 that had numerous problems. Once I'd changed all the RAM, the CPU and the ULA (surface mounted, for a…
... 've just finally fixed a TC2048 that had numerous problems. Once ...Understanding contentionI'm trying to understand contention and its implications when some "weird" bus cycles (such as I/O cycles with I/O addresses in the contended memory …
I'm trying to understand contention and its implications when some ... both memory and I/O contention. Memory contention causes T1 to be ... ?
Also: memory contention makes T1 to be enlarged ... for instance, to avoid memory contention) that begins at the ...Question of contentionI'm not desperate to go digging through technical descriptions in depth, but one thing bugs me about the Speccy's video contention model - and that's…
... about the Speccy's video contention model - and that's the ... /> And then there's the contention pattern where the memory is ... 16, so that means the contention pattern covers a run of ...128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…
... my head around the memory contention issues of the various 128K ... what is the cause of contention for banks 1,3,4 ... downs due to this apparent contention issue.Some questions about the Timex TC2048/TC2068I have been doing some research about the specs of these 2 machines but I suppose it would be better to ask for advice in the forum since I have neve…
... or analogue?
Can the TC2048 be hacked to route the ... making it work like the TC2048?
The expansion bus ...Memory Contention: A Hypothetical Fix?I have just had this crazy thought: If one were to wire an additional memory chip, say a 6264 8Kx8 SRAM, in parallel with the main memory so that it …
... reduce the effect of memory contention considerably. Possibly with the addition ...Help with a TIMEX TC2048 and memory problemBought a 2nd hand Timex TC2048 but unfortunately I detected a problem with the machine which is preventing it from working properly. I believe it …
Bought a 2nd hand Timex TC2048 but unfortunately I detected a ...Writing own emulator: Contention questionsHi! (I don't know if this message should be here or in Hardware) I'm trying to write my own emulator just for the sake of it, and I'm having pr…
... having problems understanding the memory contention in 48k, in instructions like ... is being used there for contention.
Thanks ...Timex TC2048 fixed gamesHello everyone. I am looking for games fixed or patched so that they run properly on a TC2048. Not sure if there is a list somewhere of games whi…
... they run properly on a TC2048.
Not sure if there ...Another fusetest runWould anyone with a real machine be prepared to try the latest version of [url=http://www.shadowmagic.org.uk/spectrum/fusetest.zip]fusetest[/url], my…
On a cold Timex TC2048
fusetest:
[CODE]
Machine type: 48K
Contention offset: 0x01
... memory... passed
High port contention 1... failed (0xff)
... High port contention 2... skipped (B=0x01)
So what is the best Spectrum?I've had a search and even though i can remember a similar thread somewhere I'll twist it a bit. Whats the best "unmodified" Spectrum? (modification…
... 48 I/O Speaker
TC2048 1984 Portugal 3.5 16K ... and +2 have the 'wrong' contention and contend all I/O ... . My choice would be the TC2048. It's what the Spectrum ...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…
... are still not detecting Timex TC2048 (I wonder if anyone knows ... emulators) that do not match contention and frame duration tests this ...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…
... the structure of the contention pattern on TC2048 and TC2068 are identical ... unsurprisingly different, and since my contention test depends on the frame ...Plea for new hardwareI'm posting this as a poll as I want to judge if I'm a solo loon going on about this, or if people really are interested in either of the following S…
... and software written for the TC2048 (read port #FF to determine ... to fake the effects of contention via the clashbasher by using ... ULAplus ULA fitted ie double contention. :o[/quote]
Given that ...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…
... .
I have a TC2048, but of course it only ... board for the purpose of contention outside the $4000-$7FFF range ...Spectaculator 2.0 availableHi, I've just released a new version of Spectaculator. It should be on WOS in a few days. Here's a cut 'n' paste from comp.sys.sinclair: Spectacula…
... rewind
o Memory contention and scanline-based multicolour rendering ...ZX Spin 0.3 ReleasedStandard Cut'n'Paste from CSS post again! I can't get to my webpage, so I've uploaded SPIN0.3 to WOS, Alt.Binaries.Comp.Sinclair, and also Daren Pea…
... .
Fixed an \"Emulate Memory Contention\" bug
Added Magnum Lightgun ...ANNOUNCE: vbSpec v1.60The latest, greatest, most wonderful and beautiful release of vbSpec, the free Spectrum emulator for Windows, is available now from:- [url="http:/…
... /> It now creates and reads TC2048 .z80 snapshots that are compatible ...[NEW]: Spectaculator 4.0Hi everyone, Finally managed to finish it... enjoy! --- [NEW]: Spectaculator 4.0 Spectaculator is a Sinclair ZX Spectrum emulator for PCs runnin…
... />
o Brand new memory contention system and cycle-accurate display ...ANNOUNCE: Fuse 0.6.0 and friendsThe Fuse team announce the release of version 0.6.0 of Fuse, along with version 0.6.0 of the Fuse utilities and version 0.1.1 of libspectrum, the Spe…
... /> * Get the behaviour of the TC2048 video modes correct (Witold Filipczyk ...[NEW]: Spectaculator 6.0Spectaculator is a Sinclair ZX Spectrum emulator for PCs running Windows 95, 98, ME, NT 4, 2000 and XP. Spectaculator emulates the 16K/48K/128K/+2/+…
... to support the Timex
TC2048/TC2068, the General Sound Interface ...
