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New interface for ZXThis is my old (2004) unfinished project of internal interface for ZX Spectrum 128+2: ([url]http://velesoft.speccy.cz/hardware_in_development.htm[/u…
... is ULA with different screen timing, then show multicolor effects incorrect ... is disable(off), then CPU timing is 100% compatible with original ... ZX128/+2 timing and ram pages higher than ... , zx mode, state of all paging ports, etc... -
Precisely timed loops in assemblyI'm looking for a way to make my code stop until the raster has reached the lower screen border (right after having drawn the last pixel line). I und…
... /misc/timingtest-0.2.zip"]timing test[/URL] program. There is ... interrupt precisely. Combined with the timing info for the known platforms ... way to go.
Patrik -
ZXDS 0.9.3 beta 1Hello, Today it's exactly five years since the [URL="http://zxds.raxoft.cz"]ZXDS[/URL] has come to life on my DS. To celebrate this anniversary, I h…
... different hw communication, different hw timing, different interrupt handling, different bios ... ]
Thanks,
Patrik -
ZXDS 0.9.3 beta 1Hello, Today it's exactly five years since the [URL="http://zxds.raxoft.cz"]ZXDS[/URL] has come to life on my DS. To celebrate this anniversary, I h…
[QUOTE=Patrik Rak;612098]Well, not much ... different hw communication, different hw timing, different interrupt handling, different bios ... /> ...
Thanks,
Patrik[/QUOTE]
OK, ok ... />
Great work though Patrik.
Paddy -
ZXDS 0.9.9 beta 1OK kids, here we go: Let me announce the latest and greatest [URL="http://zxds.raxoft.cz"]ZXDS release[/URL]. Mouse emulation, tape recording, stats …
... different screen timing and builtin Beta Disc tacked on. :)
Patrik -
Fusetest port 0x7FFD test resultsHi, I'm adding the Spectrum 128K emulation to my FPGA core running on the V6Z80p platform. I'm doing some tests; running Fusetest, the machine is se…
... 've written 0xff to the paging register, probably from the floating ... rises some doubts about the timing of the emulator.
paging) only when the IORQ_n Z80 ... -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... ]I meant speed, as in timing needing to be constant. sorry ... one for you :)
Patrik -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
[QUOTE=Patrik Rak;636167]
[code]
... /19T inline
[/code]
Patrik[/QUOTE]
Tried to implement ... to be inline and constant timing.If anyone can come up ... -
I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…
[QUOTE=Patrik Rak;636507]Only 30? I ... /> Hope it helps.
Patrik[/QUOTE]
Cheers for that ... 't seem to get the timing right as I find it ... -
SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... for SPECTRA to operate (sync timing with ULA).
The SPECTRA ... to take account of 128K paging and the 128K's second ... -
smooth movement in basicWas trying to figure this out myself but i would like to be pointed in right direction now :-). How do I make something move in Basic without gettin…
BTW, border color is tremendously useful for debugging timing visually, so you may sprinkle few BORDER calls into your loop to see how fast is each section performing. That's a technique which never gets old...
Patrik -
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 …
[QUOTE=Patrik Rak;659446]Why additional latch? ... something?
Patrik[/QUOTE]
Timing constraints mean you're ... time within any reasonable DRAM timing constraint of the era. Don ... of logic to change the timing of the video RAM fetch ... -
Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
... with the ZX ROM not paging out as described in this ... GAL that controls the paging: signal strength or timing.
The ... -
Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
... signal does concern the ROM paging.
[QUOTE=roko;662424 ... indeed is a matter of timing.[/QUOTE]
I'm ... -
SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... prevent an external device from paging in an external ROM and ... address lines; the process and timing of fetching attribute bytes from ... -
Correction of +2 hardware errorsThis is a collection of various pieces of information picked up from various places, including a lot from this forum. I have edited it and reworded i…
... / snow effect"
- data of paging port 7FFD are rewrited also ... cause small incompatibility with original timing in some ZX demos...
Adding TAP file contents to a Spectrum +3e DOS PartitionHello my fellow WoS'ers, This thread is a companion to a great little guide from a fellow AmiBayer [B]mnjnurney[/B] you can view his thread by [URL…
... .
I did some timing tests with no buffers and ... 'd be no problems with paging or machine code. When I ...Red DwarfA Red Dwarf video game - good or bad idea? (given its recent resurgence in popularity in the UK) My ideas: [b]Plots[/b] - An interquel which bridg…
... . One of them is called paging.
Memory in the ... memory, which means that the timing is not constant.
timing-dependent (as it's the ...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…
... .5MHz based T-States for timing, but I can live
PatrikThe Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... , how similar was your test, timing wise, to the DISCiPLE and ... ? I imagine that if the paging of the Beta interface's ... with a delay in the paging.The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... , how similar was your test, timing wise, to the DISCiPLE and ... ? I imagine that if the paging of the Beta interface's ... with a delay in the paging.[/QUOTE]
The NMI thing ...Swift Disk EmulationIn the past couple of weeks there have been two (to my knowledge) Swift disk systems come up on Ebay. Nowhere can I find roms for such a beautiful sy…
... 4K chunks with the maddest paging system I've ever seen ... an NMI, so no arbitrary timing loops. It looked like multiple ...Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... /misc/timingtest-0.2.zip"]timing test[/URL] program.
PatrikBrazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
[QUOTE=Patrik Rak;692360]You can measure ... -0.2.zip"]timing test[/URL] program.
Patrik[/QUOTE]
Patrik.Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
[QUOTE=Patrik Rak;692611]BTW, you may ... first line accordingly.
Patrik[/QUOTE]
I already ... .blogspot.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…
[QUOTE=Patrik Rak;692360]You ... /timingtest-0.2.zip"]timing test[/URL] program.[/QUOTE ... Spectrum 48K with "normal" timing should start at cycle ... Spectrum 128K with "normal" timing should start at cycle 14361 ... Spectrum 128K with "late" timing should start at cycle ...Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... on Spectrum 48K with "normal" timing should start at cycle 14335 ... the reference point.
PatrikRocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…
... that any delay affecting the paging would not cause different ... be safe to assume that paging has stabilised when fetching ... inputs just related to extra paging required for IF1 compatibility. ... a matter of modelling the timing of the FDC accurately, ...PlusDlite prototype/first batch is here![IMG]http://benophetinternet.nl/hobby/vanmezelf/20130605_143221.jpg[/IMG] [IMG]http://benophetinternet.nl/hobby/vanmezelf/20130605_153930.jpg[/IMG] …
... kind of signal timing problem, maybe something with paging of the ROM ...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…
... of that would cause a timing difference is if it was ... only if it changes the paging to the +3 model. I ...
