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JSpeccy v0.90Hi4all, A new JSpeccy version has been released at my project webpage. This new release have many corrections, some optimizations and a few new feat…
... best of them - congrats! The I register crash emulation is pretty interesting ... model.
If I could offer a couple of ... usability suggestions while I'm here? Hope you don ... 'are you sure?' message boxes. I'm always sure. :)
JSpeccy v0.90Hi4all, A new JSpeccy version has been released at my project webpage. This new release have many corrections, some optimizations and a few new feat…
... best of them - congrats! The I register crash emulation is pretty interesting ... couple of usability suggestions while I'm here? Hope you don ... 'are you sure?' message boxes. I'm always sure. :)
< ... as a possibility.
I will remember for the near ...JSpeccy v0.90Hi4all, A new JSpeccy version has been released at my project webpage. This new release have many corrections, some optimizations and a few new feat…
... as say "when I register > 0xBF and....". I don't have a ...JSpeccy v0.90Hi4all, A new JSpeccy version has been released at my project webpage. This new release have many corrections, some optimizations and a few new feat…
... as say "when I register > 0xBF and....". I don't have a ...Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…
... :
[QUOTE=takapa;632728]I wondered if somebody on here ... is the value of the I register and whose low byte is ...Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…
... is the value of the I register and whose low byte is ...Zymosis -- WTFPL'ed Z80 Emulation Corebreaking news! i'm back with another useless project: new Z80 emulation core written in pure C! i hear you screaming: "oh, no! WHY?!" let me tell yo…
I am not sure that FBZX ( ... /> For each opcode if the I register is betwen 0x40 and 0x7F ... the video memory using the register R as an additional offset ... />
if((procesador.I & 0xC0) == 0x40) { // (procesador.I>=0x40)& ...White Spectrum+Hi Folks, There is a photo of a white Spectrum+ on Rick Dickinson's website - did this actually exist i.e. working machine? Paddy
... nostalgia). By then though I had moved on from the ... .
[quote]I always liked the look of ... and QL cases though. I suspect the reality was not ... not just my opinion. I think once you take ... certain values of the I register will actually crash the ...White Spectrum+Hi Folks, There is a photo of a white Spectrum+ on Rick Dickinson's website - did this actually exist i.e. working machine? Paddy
... 's not just my opinion. I think once you take the ... and certain values of the I register will actually crash the machine ... a little more specific then. I liked the 128K+ case and ... nifty.
P.S. I really liked the PCW8512 - spent ...Has any one tried ZX Spectrum 4.net?In this week's Micromart, the Specccy emulator [I]ZX Spectrum 4.net[/I] is given a rave review, and it does sound really good. Has anyone tried it ye…
... their work away for free I guess that's fair enough ... 's the spectrum reset on I pointing to contention memory, that ... will have to wait till I sort out the *other* non ... bugs. ;)[/QUOTE]
Reset on I register. Reset on AY read.Has any one tried ZX Spectrum 4.net?In this week's Micromart, the Specccy emulator [I]ZX Spectrum 4.net[/I] is given a rave review, and it does sound really good. Has anyone tried it ye…
... same as above plus I cannot understand the ... hardware model I want, especially when I know nothing ... ad-hoc assumption. I definitely care about usability ... as good as I can. I'm an end- ... /> [quote]
Reset on I register. Reset on AY read.[/QUOTE ...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…
... can introduce instability. Also I have a feeling there ... br /> As for the DivIDE+, I don't object to them ... case).
I don't know if incorrect ... contention and contending all I/O exsits on all ... or certain values of the I register.
Thread ...Coding for 128kHi all, I wonder if anyone can suggest any useful reading/threads/examples on the fundamentals of 128k coding. Chapter 24 of the +2 manual has prov…
... not supposed to point the I register into contended memory when using ... IM2 routines?
And I don't quite get the ... you when it's done? I suppose the banks are preserved ... that.
The thing I didn't get initially was ...Coding for 128kHi all, I wonder if anyone can suggest any useful reading/threads/examples on the fundamentals of 128k coding. Chapter 24 of the +2 manual has prov…
... not supposed to point the I register into contended memory when using ... />
The IM2 problem with I pointing to contended memory only ...Coding for 128kHi all, I wonder if anyone can suggest any useful reading/threads/examples on the fundamentals of 128k coding. Chapter 24 of the +2 manual has prov…
... supposed to point the I register into contended memory when ... />
[quote]
And I don't quite get the ... when it's done? I suppose the banks are preserved ... on the CPC, what I'd probably do is ...
[quote]
The thing I didn't get initially was ...Spectranet and toastrack issueI've been using my spectranet with no problems on my standard 48k but just started using it on the toastrack and am having an issue. That being that…
... /3).[/QUOTE]
Ah, ok. I just thought it might have ... could have been triggering the I register contention bug.ZX Spectrum Core EmulatorHi All, Here i have my ZX80 Core Emulator. Which im working on to help me complete the Spectrum PLAYBASIC Emulator. I hope this comes in use for o…
The I register is not related to the index registers. i.e. IX is not a register pair made from I and X, it's simply the 16 bit register IX. I is the interrupt register.Video generation using a CPUWe know it is possible to generate a video signal using a CPU, and this technique was often used on low-end computers in the early 1980's (for exampl…
... been generated?[/QUOTE]
I've tried to simplify this ... with an internal 3 bit register in the ULA which tells ... 0 to 7) and the i register which normally points to the ... bit via an internal shift register during the next eight cycles ...Video generation using a CPUWe know it is possible to generate a video signal using a CPU, and this technique was often used on low-end computers in the early 1980's (for exampl…
[QUOTE=Matt_B;674170]
and the i register which normally points to the character table in the ROM.
[/QUOTE]
So theoretically, if this pointed to a character table in RAM, could we have hi-res graphics on the ZX-81?CyberbigI found out that Cyberbig is affected by snow effect in FBZX Wii. There is snow in the all screens except in the main menu. I checked that also Spe…
... a reset is produced when I is between 0x40-0x7F ... or I >= 0xC0 and the ... bug which causes snow when I is set to point ... crash the machine shortly after I is set to point ... form of interaction between the I register content and the own ...Games with Music BugsI know there is already a thread about games with bugs (and indeed its a awesome thread), but I thought maybe it would be nice to open another one ju…
... QUOTE=Ivanzx;698687]Lemmings: I have this game original, ... and as far as I remember the melody in ... the AY files though. I would like to load ... />
But, as the I register is placed high (causing the ... deliberately!
I made a cryptic reference to ...Games with Music BugsI know there is already a thread about games with bugs (and indeed its a awesome thread), but I thought maybe it would be nice to open another one ju…
... .
But, as the I register is placed high (causing the ... that way deliberately!
I made a cryptic reference to ... !
The thing is that I dont remember hearing the 128k ... my +2A, but I will try again when I have the chance ...Games with Music BugsI know there is already a thread about games with bugs (and indeed its a awesome thread), but I thought maybe it would be nice to open another one ju…
... .
But, as the I register is placed high (causing the ... that way deliberately!
I made a cryptic reference to ... LEMMINGS game to TRD format. I test all this versions:
Games with Music BugsI know there is already a thread about games with bugs (and indeed its a awesome thread), but I thought maybe it would be nice to open another one ju…
... br />
But, as the I register is placed high (causing the ... way deliberately!
I made a cryptic reference to ... , but those who know what I mean will understand...
... flickering."
Although I dont understand what lemc0, lemc2 ...Games that crash because of contended memory.I find these are really annoying. You load up a game like Astro Marine Corps, Fantasy World Dizzy, Dizzy: Prince Of The Yolkfolk and so on (the init…
[QUOTE=Interceptor;725055]
I think I asked about this to one ... (a looooooooooooong time ago) as I was curious why the emulators ... causes a crash when the I register points into contended ram. Emulators ...Manic Miner ZX81Hi Guys, Can anyone explain why [url=http://www.worldofspectrum.org/infoseekid.cgi?id=0017539]Manic Miner ZX81[/url] is not able to reproduce the ex…
... Saukas;728569]BUMP!
I'm taking this quote from ... sent out by setting I-register and R-register and a call to ...z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... *) (0xFDFD);
for (i = 0; i < 257; i ++) {
*address = ... **
xor a
ld i, a
; ** fix **
... /> ld a, $FD
ld i, a
; ** fix **
... contended RAM page while the I register was pointing over $C000 ...z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... im2 mode and loads the I register with 0xd3
* memset() creates ... :
[quote]
if I do this:
[code ... a return. That's why I asked him why he did ...128k programmingOk, I have had the normal man look (ie. not really), I want a good resource for 128k asm programming. Mostly just to find out how the RAM bank switc…
... a contended bank with the I register pointing into a contended bank ... banks, meaning don't let I point above 49152 (into a ... such a problem by setting I to zero on entering an ...IX register - using/problemsAre there any rules on using the IX register? Are there any restrictions on the memory locations that it can access? Yes, I know it's slower than us…
... for the info regarding IX register. I've been using it to ... finding the typo I recalled reading that the 'I' register didn't like ... or 128k (correct me if I'm wrong on this) and ... thought that I had stumbled upon that instead ...
