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48K games that don't work on a +2Not sure if there is already a thread about this but recently I've noticed some old 48K games will not run on my +2 - even in 48K mode. Examples are…
... .
7) Z80 timing differences. The Z80 in a ... $7FFD which disables any further paging requests.
9) ... port $1FFD which provides extra paging possibilities. In particular it ... machines. This would only cause timing issues, not really a ... -
What are the best shoot-em-ups for the Spectrum?I mean, besides Zynaps. That's pretty much a given.
... yesterday, the TR-DOS ROM paging already works nicely and FDC ... though, I promise!
Patrik -
TR-DOS in ZXDS[QUOTE=Patrik Rak;278549]The goal is to get the TR-DOS working, I have started working on that yesterday, the TR-DOS ROM paging already works nicely …
... works on real hardware due timing delays). RDS fails two ways ... I/O sessions.
Patrik
P.S. I ... -
'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…
... .
My timing is out quite out of ...
; save old paging state in 'd'
ld ... ; Invert bit 3 of paging register
ld a,e ... /> ; Restore bit 3 of paging register
ld a,d ...
; restore paging register
ld a,d ... -
Questions about the Speccy and it's emulationOut of interest, and to raise another interesting discussion, I have some questions about the Spectrum and it's emulation; 1) Is everything known ab…
... fast enough to handle the timing correctly?[/QUOTE]
Not really ... it is playing.
Patrik -
In-game music takes CPU time?If a 128k wants to have music played in-game using the AY sound chip, does that consume a lot of CPU time? What I am after is if the reason why man…
... effects or something?[/QUOTE]
Timing. It uses it to jump ... allowing higher frequencies.
Patrik -
In-game music takes CPU time?If a 128k wants to have music played in-game using the AY sound chip, does that consume a lot of CPU time? What I am after is if the reason why man…
... to the ULA with precision timing. Your interrupts would essentially have ... perhaps in the fashion that Patrik described.
Also, getting ... -
ZX games for fixingExist any games/software which need fix any bugs ? - incorrect graphics - incorrect or bad keyboard controll - too fast games (need slow-down) - game…
... ay sample loops with tight timing would become very slow due ... push and pop bc before paging.
as for converting ... -
ZXDS 0.9.0 beta 1Hi! New version of [URL="http://zxds.raxoft.cz"]ZXDS[/URL] is available. Only one important change this time, but the one I have been dreaming about…
[QUOTE=Patrik Rak;397851]Ah, I see. ... this entirely (i.e., proper timing stuff included) would likely require ... support) currently doesn't have timing accurate multicolour it just means ... -
Mistake in the 128K technical FAQ?[url]http://www.worldofspectrum.org/faq/reference/128kreference.htm[/url] [quote]Memory banks 1,3,5 and 7 are contended.[/quote] Really? I thought i…
... 16K headerless blocks at 0xC000, paging each RAM bank in turn ... , or near-zero impact on timing of the ROM routine. And ... -
New RZX Block Type Suggestion -- AnnotationWho is maintaining the RZX specification at the moment? I'd like to ask for the feasability of the following request. Annotations embedded within th…
... here you go).
Timing: Timing within a Text Stream is ... the format layout.
Patrik -
New RZX Block Type Suggestion -- AnnotationWho is maintaining the RZX specification at the moment? I'd like to ask for the feasability of the following request. Annotations embedded within th…
... that I don't think Patrik has mentioned is that TZX ... concatenated like this then annotation timing may become inconsistent. One solution ... -
ZX ULA Book releaseThe book is complete and with the printer. Once the proof copy is back and checked, and assuming no changes are required, I'll start shipping all you…
... lookup the Z80 memory access timing picture elsewhere. :)
Seriously ... they are doing.
Patrik -
ZX ULA Book releaseThe book is complete and with the printer. Once the proof copy is back and checked, and assuming no changes are required, I'll start shipping all you…
[QUOTE=Patrik Rak;478848]Not counting the ... lookup the Z80 memory access timing picture elsewhere. :)[/quote]
I ... -
How compatibel is the Sprinter 2000?How compatibel is the Sprinter 2000? I have one but only trd software runs. Joystick did not work and tape in and tape out too. I have schematics bu…
... configurator with possibility change screen timing(Pentagon/Scorpion), turbo on/off ... use different adressation of memory paging ports, then can be problem ... using uncomplette ports adressation or paging via LD A,xx + OUT ... -
The Programmers Development System (PDS)Hi everybody, I recall this system has been mentioned several times on WoS forums. Last time was, I think, when those sources from Maz Spork (Buggy …
... frame sync'd so scrolling/paging up/down has no tearing ... runs at the correct speed/timing and frame rate plus I ... -
Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
... perhaps want to maintain some timing so people can actually see ... * better than this.
Patrik -
Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
[QUOTE=Patrik Rak;486028]INC (HL) sets ... not?
[QUOTE=Patrik Rak;486028]
BTW, what ... perhaps want to maintain some timing so people can actually see ... -
Is this the infamous Dead CockroachCan anyone help me. I have an issue two spectrum that I want to list on ebay, but I want to know if this has the dead cockroach ULA fix. I would have…
... active).
To maintain timing compatibility, the later ULA versions ... it a bit.
Patrik -
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…
... I just screw up some timing and we are cycling the ... really worth it.
Patrik -
Push/Pop data copyingWe all know that stack pointer cheese and push/pop is faster to move data than LDIR - which in turn is slower than unrolled LDI's anyway. I rewrote …
... get the "meets the beam" timing right to make (some of ... long time ago...
Patrik -
Push/Pop data copyingWe all know that stack pointer cheese and push/pop is faster to move data than LDIR - which in turn is slower than unrolled LDI's anyway. I rewrote …
[QUOTE=Patrik Rak;522294]But I was ... get the "meets the beam" timing right to make (some of ... -
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…
... matters for code needing exact timing.[/quote]
Makes a ... gone for the Timex RAM paging system and modes, if they ... -
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…
... fusetest differentiate between machines through timing?[/quote]
It doesn ... to port 0x3ffd activates memory paging. To quote from guessmachine.asm ... ] from that port induces memory paging on the 128K (and doesn ... -
BUZZSAW+ Demo No. 3Right, another demo of BUZZSAW+. [URL="http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_3.tap"]Joefish_Buzzsaw_Demo_3.tap[/URL] The default con…
... [/B] showed me how the timing works on a POP/PUSH ... so I can use screen paging too.
I'd ... -
Nyantro (Nyan Cat on Spectrum)After the response today at Replay Expo, it has come to my attention that not enough people are aware of my Speccy conversion of the cult internet hi…
... all is, in ZXSpin the timing seems to be all over ... again, I presume you're paging memory banks every four lines ... -
3DS and Speccy Emulators?Noticed that there seems to 3 or 4 emulators for the Nintendo DS. I've just picked up a 3DS. iS there any one that works best to go for? I'm assuming…
... . Well, for example the additional paging features, that would be trivial ... , or text viewer.
Patrik -
3DS and Speccy Emulators?Noticed that there seems to 3 or 4 emulators for the Nintendo DS. I've just picked up a 3DS. iS there any one that works best to go for? I'm assuming…
[QUOTE=Patrik Rak;590671]Unlikely. Well, for example the additional paging features, that ... , or text viewer.
Patrik[/QUOTE]
Yes please ... -
FPGA ZX SpectrumJust wonder: how many of you would buy "new hardware based" and "in case" ZX Spectrum based on FPGA? ;) [url]http://www.fpgaarcade.com/[/url]
... many games require cycle accurate timing? 10%? Less?[/quote]
This ... back in. The memory bank paging is such a pain.).
Which Speccy game had best border effectsIn truth, I'm just trying to remember a game from my youth, and the amazing border effect during pause is the only thing I can clearly recall about i…
... . So unless you calculate the timing of every other bit of ... /misc/timingtest-0.2.zip"]timing test[/URL] which I have ... the two instructions.
Patrik
