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How to speed up TZX loading (emu development)With many newer emulators there are options to do faster loading schemes, even for turbo-loader or protected loader blocks in TZX files. For example,…
... :p[/quote]
The R register would also be a good ... -
Madness or inaccurate docs: RR r/RL r?According to the Z80 User's Manual, the instruction RR r/RL r should rotate the carry flag into bit 0 or bit 7 of the register in question (bit 0 or …
... Manual, the instruction RR r/RL r should rotate the carry flag ... or bit 7 of the register in question (bit 0 or ... -
Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…
... rom seem to use the register pair BC for parameters, ... whatever was in the BC register pair. To communicate parameters ... />
[code]
let r = USR 32768: REM move 3 ... ,100,20
let r = USR 32768, "move 3 ... ,100,20"
let r = USR 32768, "move", a ... -
Network cableSorry for almost flaming with all my... er.... two questions now...! ;) I read in the Microdrive 1 manual about network but I cannot find out what k…
... the software resolves using the 'R' register to provide a random number ... -
Network cableSorry for almost flaming with all my... er.... two questions now...! ;) I read in the Microdrive 1 manual about network but I cannot find out what k…
... the software resolves using the 'R' register to provide a random number ... -
Help make Retro Gamer greatI'm more than happy with the articles that are now appearing in Retro Gamer, but I want it to become far more of a hub for the retro community than i…
... see is when the IR register pair is cycled through to ... particular value - bit 7 of R is missing, which causes a ... -
Cybernoid editorSo, my long tern goal is to make my own Cybernoid or Rex like game (see an ancient thread about Sprite advice)...but my skills are somewhat lacking..…
[QUOTE=Mr. Anonymous;175887][url=http://download.yousendit.com/A377C88A6C2139ED]>>>Demo -
toasted soeccysHello, ive jsut bought a pair of speccys on ebay (one 16k issue 2 & a prob 48k issue 3) unfortunaly the genius who sold them tried to see if the wor…
... check the Z80's R register. The Z80's R register will function in ... -
k7zx, a utility to load programs to Spectrum at very high speedk7zx is a windows program that convert .tap, .tzx , .sna and .z80 files to a wav file that can be played to a real Spectrum. You can down load it f…
... very clever use of the R register to control timing but I ... chose to WRITE to the R register also. You are a v ... -
Whats an .SLT file?I found a website with a load of them on. Spectaculator gives no icon in windows explorer for them.
... pretty sure one of the register parameters (in A) was the ... />
I do remember playing R-Type and Myth quite a ... -
Question about snapshot files....I've noticed that everytime I play "The Boss" (football management) it produces the same scores. I've played the first 5 games 3 or 4 times now and t…
... also try to use the R register to generate a seed. This ... deterministic as the value of R depends on the number of ... -
New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…
... few undocummented Z80 features and R register, if I remember correctly, nothing ... -
New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…
... with?)
2) use the R register to decode the data as ... -
New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…
... /> [quote]
2) use the R register to decode the data as ... -
New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…
... it impossible to use the R register to encode/decode data on ... saving the file doing the R register stuff, would that be better ... -
New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…
The slightest variation in tape motor speed would push the value of the R register some way out from the value it held during the saving of that same pulse. -
New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…
... push the value of the R register some way out from the ... />
Decrypters can use the R register to decode the already loaded ... -
New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…
... of forgetting to correct the R register so it made lots of ... -
New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…
... of forgetting to correct the R register so it made lots of ... as it would affect the R register. Edit: Oh, I see, that ... -
New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…
[quote=BloodBaz;187144]Decrypters can use the R register to decode the already loaded data as the clock cycle whilst processing instructions is will defined (assuming interrupts are disabled of course)[/quote]
Ah right, that's pretty cool! :) -
New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…
... as it would affect the R register. Edit: Oh, I see, that ... sloppy and forgot that the R register would be totally wrong if ... -
the lost years...hello what i am refering to in the title is the years 1993-1997 when the ZX spectrum was dormant.i know that WOS was set up in 1995,but i am guessin…
... because it depended on correct R-register behaviour or something was a ... -
How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... Beret, Cobra, etc) uses the R register to count cycles past so ... -
8-bit or 16-bit registers?I'm playing around with writing a Speccy emulator for mobile Java at the moment. I did a quick and dirty port of Qaop, which does run but at less tha…
... reply to BloodBaz: ideally all register access would be done via ... whilst others (A, F, I, R) should be stored as 8 ... -
Beautifully programmed gamesJust watching the bobby bearing tzx and admiring the beautiful programming involved. Which other games would you say had asthetic programming opposed…
... understand the whole thing with R register in WaitVBlank and beeper routines ... -
New protection systemsAs a follow-up to [URL="http://www.worldofspectrum.org/forums/showthread.php?t=14311&page=2"]this[/URL] thread regarding relatively new protection sy…
... as it would affect the R register. Edit: Oh, I see, that ... (or LDDR) coupled with the R register didn't cause any real ... calculator get the val or R entering the LDIr then val ... -
68000 programming.Anyone here know anything about this? My question is: how does the programmer know how long hisinstructions are? Do determine the operands to branch …
... /> * by s a m. f r. j u l. 2 0 ... otherwise, put address into appropriate register
jmp OPPARSE and see ... loading effective adress into adress register
OPPARSE asr #$8,d0 ... -
Emulation vs SpecApologies if this is an old thread, what does anyone think is the best - playing spectrum games through emulation or on a real speccy? I feel it's b…
... instruction timings, deal with the R-register properly and assorted other niceties ... -
Emulation vs SpecApologies if this is an old thread, what does anyone think is the best - playing spectrum games through emulation or on a real speccy? I feel it's b…
... instruction timings, deal with the R-register properly and assorted other niceties ... -
A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…
... specific registers (without naming the register explicitly) - for example djnz uses ... example, OUT (C), r really does OUT (BC), r - since it puts ...
