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I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…
... z80_pc
decode the opcode as per GOC's table ... space for various parameters the opcode will expect.
Perform ... z80_pc to point at the next opcode. It may help to keep ... frequency - and handily enough, each opcode takes a number of T ... -
I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…
... bit memory address of the next instruction, right?).
[/quote]
opcode takes to execute, in relation ... advanced to point to the next opcode, which you fetch and decode ... -
I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…
... view, they mean "get the next opcode and look *that* up in ... -
Galaksija emulator for ZX Spectrum +3/+2A(black)This is a NEW program/utility/game pack for ZX Spectrum. It is basically an emulator of an ex-Yugoslav computer "Galaksija" which is also Z80 based. …
... every command possible.
Every opcode is reached in 26T states ... is added to synchronize the next opcode -
VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…
... decides by checking whether the next opcode is BEQ/BNE. A similar ... -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
... then just continues executing the next opcode. ED fetches, decodes and executes ... a completely different opcode map. It's the same ... -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
... then just continues executing the next opcode. ED fetches, decodes and executes ... a completely different opcode map. It's the same ... applying it for the 'ED' opcode map as well, just as ... -
HALT: Why always 4ts?Instruction breakdown of halt is like that: PC 4ts. That means it fetches instruction byte from ram which tooks 4 ts and then does nothing and read…
... Z80 keeps doing an opcode fetch of the next instruction until there ... don't know whether this next opcode is (a) latched inside ... external hardware that changes the opcode read @ some point (I ... the HALT opcode was first fetched), or the next one (instruction ... -
Optimized (in size) Z80 simulatorI am evaluating Z80 simulators to try to create a tool to analyse z80 programs. I'd like to start with a simple register coverage tool and t-state cy…
... DE ; from 1 byte opcode, point to next opcode
main:
... LD A,(DE) ; fetch opcode
... /> JP (HL) ; jump to opcode execution
table at ... #6301
JP I01 ; do opcode #01
This can ... -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... refers to Address, Op is Opcode, and the last two numbers ... /> 1. Try out the current opcode/combination thereof twice for all ... ).
2. Move to the next opcode/combination in the list and ... -
Help pleeease "Proving Emulator OpCode flags are correct"So I had a cunning plan... I wanted to write a test harness for Emulators that could "prove" that all opcode flags were correct. I wanted something m…
... +m,n
40 NEXT m
50 DATA ... POKE xAddr,F
230 NEXT F
240 SAVE *" ... POKE aAddr,A
270 NEXT A
280 POKE ... dAddr,D
290 NEXT D
The ... of affected registers for every opcode)? Doing this BASIC/Assembly ... -
Next Archive Update on WOS?The last WOS archive update was 14th Nov 2000...When will be the next update?
The last WOS archive update was 14th Nov 2000...When will be the next update? -
Emulation and Debugging functionality[Cut n Paste from the original CSS post] Hi all, I'm currently working on SPIN's debugger, which is coming along nicely. Mostly, it's been devel…
... before or after the current opcode, which
allows any debugging ... for future consideration.
Next update is much more stable ... will be available in the next week or
two, ... bugs.
[2] I *know*. Next update, promise, mate.
[3 ... -
The Next GenerationJust won a Speccy off Ebay, so for the first time in about 10 years I'm using a real Spectrum. When I was opening it my 8 year old son was looking ov…
... it up in his bedroom next to the Playstation 2, he ... -
"TommyGun" gets a complete MAKEOVER for next release ...From the author, Tony Thompson ... """""""""""""""""""""""""" [B][I] I hadn't worked on the TommyGun editor for while. But when I got sick (about …
... when I put out the next version of TommyGun. I wrote ... -
Help needed prior to next vault updateHi everyone.... The next vault update is not too far away, however, I've managed to source 9 unlisted titles, 11 titles which are MIA and a further …
Hi everyone....
The next vault update is not too ... them when the vault is next updated...
However, my ... -
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... /> Internally, the Z80 divides every opcode into M-cycles; each M ... /> * M1: 4 tstates: read the opcode (0x34).
* M2: 4 tstates ... stack.
What happens next depends on the interrupt mode ... at the end of the next instruction, the NMI will still ... -
pics next to titleshi, just an opinion , nothing more, i think would be very helpful to a have small screenshot of every game next to its tilles in the A,B,c...Z lists…
hi,
just an opinion , nothing more, i think would be very helpful to a have small screenshot of every game next to its tilles in the A,B,c...Z lists.
thanks.
[ This Message was edited by: morning on 2004-10-24 22:54 ] -
Mr Jolly Lives Next Door!!!No I dont have the Video, but I did find this site which is the next best thing. [url="http://www.pagan.clara.net/index.htm"]http://www.pagan.clara.…
No I dont have the Video, but I did find this site which is the next best thing.
[url="http://www.pagan.clara.net/index.htm"]http://www.pagan.clara.net/index.htm[/url]
Most amusing, I trust you'll agree!!!! -
20% off my next ebay itemI got an email from ebay saying I will get 20% off my next purchase ( if I use Paypal) up to the value of ?20.00. Has anyone else had one. [ This M…
I got an email from ebay saying I will get 20% off my next purchase ( if I use Paypal) up to the value of ?20.00. Has anyone else had one.
[ This Message was edited by: swordheart on 2005-05-27 19:50 ] -
Skool Daze feature in next Retro GamerA quick heads up for you guys... The next issue of Retro Gamer (on sale June 9th) includes a feature on Skool Daze, with interviews with programmer …
... you guys...
The next issue of Retro Gamer (on ... .retrogamer.net[/url] in the next few days. -
ZX Adventure Club - next month's gameHello, all I hope you are all managing in the lands of [I]Monster[/I] and managing not to get killed too often or too confused by the stone with the…
... particular company or owt for next month so I am opening ... game you want to play next month here and include the ... -
ZX Spectrum +2 "one with directional keys next to the tape deck"Hi! My dad claims when he had a speccy +2, the directional keys were next to the tape deck. I have a second hand +2 from GameStation (go there for g…
... +2, the directional keys were next to the tape deck. I ... !) And that dosnt have them next to the tape deck.
My next "Sinclair" car.....alright, folks. My trusty failthful 1992 Citroen ZX is finally about to be "ditched"... It's been having all kinds of reliability problems, lately,…
... />
What would be the next best car for a Spec ...Next week?It's possible... It might even beat the next issue of the Shed ;)
It's possible...
It might even beat the next issue of the Shed ;)Which next gen. console will you be getting?I'll be going for the Wii myself. Mainly because of the unique quality games for it, eg the Zelda franchise. The innovative controller, cheap price…
... winner IMO.
What next gen. console will you be ...Next generation, one console?Don't you think it's strange that we have multiple consoles? If you want to play an exclusive game for Xbox, Wii or PS3 you have too buy all the mac…
... [/URL] recently spoke of the next generation of hardware being FORCED ... about 6000 games coming out next year and just not enough ...
