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Z80 register decoding document error?Hi, I've been working on a disassembler using the following document written by Cristian Dinu (aka GOC?). [url="http://www.z80.info/decoding.htm…
... use one that best describes the fact that B will pick ... even if (IX+d) addresses the ROM.
Personally I use ... +d) which probably isn't the best one to accurately reflect ... the operation. That's just habit :)< ... -
Z80 register decoding document error?Hi, I've been working on a disassembler using the following document written by Cristian Dinu (aka GOC?). [url="http://www.z80.info/decoding.htm…
... likely to make the user understand the exact way this ... d) points to the ROM.
Still, the other representation isn' ... more thought, I think that the 'LD...' representation actually makes ... sense. I'll make this the 'main' representation.
Z80 register decoding document error?Hi, I've been working on a disassembler using the following document written by Cristian Dinu (aka GOC?). [url="http://www.z80.info/decoding.htm…
FUSE's Z80 core test may provide some useful resources - as well as the ROM + The Complete ROM disassembly.CPC 464 plus - technical help please.I set up my CPC464plus today. With a cartride inserted, it works. Without a cartridge inserted, it displays just a green screen. I have one cart, …
... RomBoards). Both the 464+ and 6128+ have the disc rom present because it ... contains the startup menu code. The workaround ... which expects specific versions of the ROM code, but not very often ...Spectrum programmingI have a Spectrum+ at home. I tried to write some programs in BASIC (IIRC i wrote a breakout clone in which you had to hit those spider-like characte…
... /sinclair/books/[/url]
The keyboard is a matrix of ... bit
You read the keyboard like this
LD ... BC,#NNFE ; NN holds the row ( i.e BIN 11111101 ...
The beeper can be found in the ROM how to useSPIN betaHello. This is my first message in this Forum, so excuse my bad english as it is not my main language. I would be extremely grateful if somebody cou…
That suggests to me that SPIN is not finding the ROM files.SPIN betaHello. This is my first message in this Forum, so excuse my bad english as it is not my main language. I would be extremely grateful if somebody cou…
Although you'd usually get a dialog box stating that the ROM couldn't be found.
So, probably you're trying to run some of my Speccy software perhaps? :)Them! (project future modelled game) hello! i was hoping someone could answer a problem i am having completing this game.i have recorded the game for RZX viewing yet,i cannot complete i…
... any probs,them on the other hand......well........very ... cannot activate the countdown,sometimes i get the feeling certain ... pulls out of the dive bomb on the rom's we used ... ,perhaps it's the +3 ... you away to the right at the last minute and ...Fiendish FreddyHi guys, just one more query before I call it a day - anyone familiar with Fiendish Freddy's Big Top 'O Fun? We recently submitted it to the RZX arch…
... me how to land in the tea cup in fiendish ... pulls out of the dive bomb on the rom's we used, ... perhaps it's the +3 disc ... pull you away to the right at the last minute and also ... that little nudge at the end of the dive a trifle annoying ...+3 sound questionsI know that the original +3 had the distorted sound problem. I also know that the +3b does not. Can anyone tell me what issue of the motherboard ca…
damieng,
Do you know what issue motherboard had a 4.1 rom? the old 'qaz plm' trick seems to work on issue 1 and 2 motherboards. When I go into the diag, it doesn't tell me the rom version.BASIC performance tips?Been fiddling around with an old project a little after rescuing it from tape, and I'm toying with the idea of completing it (hey, better late than n…
... isn't going to affect the performance very much - BASin runs ... [1], and the profiling will be hooks into the ROM using hijacked (unused ...Who the fcuk is Paul McKenna??Disappointing development: [url="http://www.worldofspectrum.org/showwrap.cgi?permit=houses/McKennaPaul.pmt"]http://www.worldofspectrum.org/showwrap.…
... now we're using the rom for free but thank ... 20 years back dont have the same attitude.
the majority dont seem to ... down their hosting of a rom etc. Look at Elite, ... Our fault for not making the Speccy scene more underground !< ...About z88dk and autoexecsThis weekend I was playing a little with z88dk C cross Compiler. Amazing tool! I have three questions: 1- Does anybody know how to change the initia…
... zcc to pass the argument to the assembler. The rHHHH is the z80asm option ... /> [/quote]
printf uses the ROM print function and Lee's ... /> If you want to access the ROM directly or do your own ...Setting the borderCan someone tell me best way to set the border to a given colour using machine code. Its there an operating system call or can I load up a memory loc…
... to the beeper sound routine in the ROM.
To set the permanent ... border colour load the accumulator with the ... colour you require and call the ROM routine ...Mac OSX 10.3 - Emulator ProblemHi guys, I used to have a good emulator on my Mac on OS 9 but since using OSX 10.3 (Panther) I can not get one to work. I have tried zxsp 0.6.2 but…
... standard speed loaders that use the ROM routines. For other loaders, you ... can wait the approx. three minutes for the game to load ... also make yourself after loading the game once).
... from the TZX Vault and waited for the menu screen. Once the ...Port 0x7ffd Partial DecodingI'm trying Pitfighter on my emulator and it runs in +2A/+3 mode but crashes in 128k/+2 mode. I traced it down to an OUT instruction which sends 4 to …
[quote]
On 2005-02-28 21:03, I wrote:
...sends out 4 which on +2A/+3 sets the ROM high byte...
[/quote]
That's a lot of ROMs ;)Spectaculator/zx81.rom/zx printerHi I'm Paolo z I've loaded on Spectaculator6.25 (not registred) the following rom file (renamed zx81.rom) on spec128k: [url="http://www.fruitcake.pl…
... ) and the ROM is not the correct size to replace the +3 ROM.
the fact that the ROM setting has been changed ... , and saved. Unfortunately the splash ... to make a custom ROM of the correct pages?
...Spectaculator/zx81.rom/zx printerHi I'm Paolo z I've loaded on Spectaculator6.25 (not registred) the following rom file (renamed zx81.rom) on spec128k: [url="http://www.fruitcake.pl…
... /> I've tested that rom (zx81.rom) also on SPIN 5.04 ... in the emulators but (maybe) in some routines of that rom.
Now i've mailed to the author of the rom about the ... problem of the shifted print ...IN Port FE bit 6 confusionI know I've got this wrong. Tapes load fine but it all feels messy. Currently my emulator does this: Sets bit 6 of the result to 0. If (and only if…
... port FE.
Well, the ROM load routine disassembly says:
I assumed that the 7F referred to the EAR as well as ... the Break.
So ... from FE no matter what the high address? Maybe this is ...TZX formatQuick question: What is the current pulse level at the start of a TZX file? Difficult question: Why does the format say that the final pulse shoul…
... colour.
[/quote]
The ROM save routine doesn't add ... called at the end of the process to restore the border colour ... pause after the last block in the file, to let the loading ... routine see the additional ...TZX formatQuick question: What is the current pulse level at the start of a TZX file? Difficult question: Why does the format say that the final pulse shoul…
Incidentally the PDF of the Complete Spectrum ROM disassembly misses a RRCA instuction ... change be determined from the ROM code? Does the signal always fade to ... 0 after writing to the MIC port but we ... t see it much because the pulses are always relatively ...complete noobelo, I was lookin for a spectrum emulator so I downloaded one off this site. I worked out how to use it and everythin but have no idea how to get ful…
Fuse now finds the ROM files and starts up ... error: couldn't find ROM '48.rom'
Fatal signal: ... own directory gets round the problem so it looks ... />
The only other thing is the speed. That varies ... true Speccy speed, as did the first Win32 port. Still, ...TZX formatQuick question: What is the current pulse level at the start of a TZX file? Difficult question: Why does the format say that the final pulse shoul…
... this change be determined from the ROM code?
[/quote ... memory contentions occurring in the ROM code between them ... />
The shape of the signal when it freely ... the indicial (step) response of the electronic circuitry of both the Spectrum and the ...complete noobelo, I was lookin for a spectrum emulator so I downloaded one off this site. I worked out how to use it and everythin but have no idea how to get ful…
... wrote:
Fuse now finds the ROM files and starts up okay ... 't be bothered adding all the relevant code.
[quote ... ]
The only other thing is the speed. That varies ... true Speccy speed, as did the first Win32 port. Still, that ...How to detect 48k modeHow can you detect if a 128k machine is in 48k mode (from an emulation point of view, not via BASIC or machine code)? Checking the current rom? But …
... tons of formal definitions, the mentioned TZX block was meant ... suggest to interpret the TZX block according to the status of ... this interpretation, are Outrun (detects the PSG, will crash in locked ... Lemmings (tests a byte in the ROM, very ugly IMHO).
< ...How to detect 48k modeHow can you detect if a 128k machine is in 48k mode (from an emulation point of view, not via BASIC or machine code)? Checking the current rom? But …
IIRC Lemmings checks the copyright message string in the ROM (1982/1986), but now ... I can't remember the exact ... I've looked back at the code!
Also I didn ...New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…
... />
I began compiling the useful addresses/ports doc. So ... in the ROM, stuff to change the char set, stuff to change the UDG ... how to read the keyboard, how to avoid the "Program: blah" ... a couple of bugs, commented the code, translated them, compiled them ...Looking for rare TZX blocksBy rare I mean out of the hundreds of TZX I have non of the following blocks exist. I need to test my loading/handling/saving code. Are there any TZX…
The ROM writes 3223 pulses, not 3222, with the first OUT putting a ... in the MIC port. Whether the first pulse gets glued with the ... previous status of the line ... than something really part of the save process. Any other ...New Compo IdeaI've had this idea and would like to know what do you think about it. I think that most of us here know how to code in BASIC. The problem with Specc…
... three. The message printed out is contained in ROM starting at ... address 5010 decimal. The end of the message ... but since the message printed is fixed and in ROM, you may ... , try PEEKing the contents of the three addresses (the base of which ...
