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BIFROST* ENGINE 1.2 released!Another improved version of the BIFROST* ENGINE is now available! Download it here: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027405[/u…
... , on a standard background; recovering T states (at reti) pretty much as ... -
64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…
... (the fact that the # of t-states from halt to first pixel ... -
T-States?Can anyone point me to any good reading (or summarise) that will explain exactly what a tstate is? At the moment for me, tstates are a useful gauge …
... take four clock ticks, or T-states, to do these three stages ... write from memory, take more T-states to execute than others. Some ... how many clock ticks, or T-states it will take.
< ... guess the approximate number of t-states an instruction will take. Honest ... -
T-States?Can anyone point me to any good reading (or summarise) that will explain exactly what a tstate is? At the moment for me, tstates are a useful gauge …
... guess the approximate number of t-states an instruction will take.[/QUOTE ... -
T-States?Can anyone point me to any good reading (or summarise) that will explain exactly what a tstate is? At the moment for me, tstates are a useful gauge …
... (and therefore where from) the T-States are :p
If ... you don't understand the underlying principles, te ... table won't make much sense. R-Type ... -
j symbol-shift p pA phrase I will never forget... and apart from the word code, i don't think I learnt ANY of the other keywords off by heart.... Without looking, whic…
... I know by memory the T-states for almost all opcodes from ... -
64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…
... struggled to adjust the 228x4 T-states wait between switches) :) But some ... -
64x48 full colour graphicsHow feasible is this? Could an interrupt-driven routine be used to, for example, fill the top two thirds with a 64x32 blocky picture and leave the bo…
... struggled to adjust the 228x4 T-states wait between switches) But some ... -
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…
... . These were taking N of T-States as input and retured N ... of actually executed T-States. Guess I should change my ... -
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]>[C++ Warning] zymosis.c(195): W8081 void functions may not return a value[/i]
yes, it's a typo. just delete 'return', it's really 'void'.
[i]>[C++ Warning] zymosis.c(968): W8008 Condition is always true[/i]
no, that ... -
Light Gun on LED TV?Hi all! I noticed I can't make a Sinclair Light Gun to work in my LED TV set. Is it possible to make it work in some way? I guess the way the LED TV'…
... electron beam - but I wasn't aware about the use of ... /> Your correct though, they aren't just infrared ones...
I can't remember how the Speccy gets ... its something to do with T states... Feel free to correct me ... -
assembly optimization: times tenDecimal numbers are not computer friendly :) Anyway, short of saying "sod it - I'll multiply by 8" - and another part of the program does indeed div…
... a look up table (29 t-states) - but wasting 512 bytes to ... save a 23 t-states...
[code]
LD ... -
assembly optimization: times tenDecimal numbers are not computer friendly :) Anyway, short of saying "sod it - I'll multiply by 8" - and another part of the program does indeed div…
... a look up table (29 t-states) - but wasting 512 bytes to ... save a 23 t-states...
[code]
LD ... -
80x24 mode (Timex required)Hopefully Martijn will be adding this to the archive soon, but until then grab it here: [url]https://dl.dropbox.com/u/15659782/BASIC80.zip[/url] Th…
... FDD3000.[/quote]
Didn't States & Capitals use it? There ... a development system. I don't know if it got as ... existed?[/quote]
I don't have any info on how ... users are gamers and aren't really interested in BASIC. There ... -
80x24 mode (Timex required)Hopefully Martijn will be adding this to the archive soon, but until then grab it here: [url]https://dl.dropbox.com/u/15659782/BASIC80.zip[/url] Th…
[QUOTE=aowen;644146]Didn't States & Capitals use it? There ... is broken so I can't test if Tasword used 64 ... TOS to +3DOS converter.
States & Capitals uses normal screen ... it did.[/QUOTE]
Don't know if Tramiel jumped out ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... contention pattern starts at 8759 T-states after the interrupt, and ... repeats every 228 T-states.[/LIST]
This conclusion ... is always [I]5602 T-states[/I]. Moreover, these results ... the Spectrum 128K but 5603 T-states earlier. This seems quite ... -
Performance Analyser?Disclaimer: Im asking this question as a "non-programmer" so please forgive my ignorance if this turns out to be a daft question. During the life-sp…
... by the hand, by counting t-states in intense loops like sprite ... ) allows to measure time in t-states between two breakpoints. There are ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... /+2, except everything happens 5602 T-states earlier.
[/LIST]
The ... -
Brazilian TK90X and TK95SpecEmu provides explicit support for Brazilian TK90X. Other emulators provide indirect support (perhaps the "Spectrum 48K NTSC" option in Fuse?). Al…
... in the TK90X are 5602 T-states earlier than "normal" (non-late ... as if it was 5602 T-states earlier than "normal" ZX-Spectrum ... TK90X border timings are 5603 T-states earlier than "normal" Spectrum 128K ... -
Work out attribute location in MCHow do I go about writing a MC routine which calculates the attribute address from a set of PRINT co-ordinates. I know you in basic you multiply the…
... t-states, 8-bit shift may cost only 4 t-states if you don't ... add. You just OR (4 t-states) bits from 2-7 of ... -
Performance Analyser?Disclaimer: Im asking this question as a "non-programmer" so please forgive my ignorance if this turns out to be a daft question. During the life-sp…
... getting corrupted but I don't know what is doing it ... the emulator "ok, stop advancing t-states now", run my debug code ... this but it all takes t-states and screen space. Would be ... ) and have it take 0 t-states.
Now, all ... -
z80 Code Profiling (RESOLVED)Hi All, Just a quick question to ask if there is any way of profiling z80 Code for the Speccy??? I'm trying to write a piece of software and I curr…
... about labels but I don't know of any that will ... other repeatedly, noting down the t-states difference and perhaps build up ... -
z80 Code Profiling (RESOLVED)Hi All, Just a quick question to ask if there is any way of profiling z80 Code for the Speccy??? I'm trying to write a piece of software and I curr…
... layout, but this won't be saved when you exit ... are many errors in the T-states data, because this is ... to be temporary, but didn't get updated. Most of ... instructions have the 2 possible T-state values swapped etc.< ... ve added one, you can't delete it! This is ... -
z80 Code Profiling (RESOLVED)Hi All, Just a quick question to ask if there is any way of profiling z80 Code for the Speccy??? I'm trying to write a piece of software and I curr…
... that i need to count t-states in the block of the ... it's just a 8-t nop followed by jr over ... emu this 'traps' takes no t-states, so it's cool. %-) and ... -
Random number from a rangeHow can I generate in assembly a random number from a range, let's say 0-21 or 0-57? There are generators which make it 0-255. By using bit masks I…
... ;) )[/QUOTE]
Common, how many T-states 8-bit multiplication takes ? About ... -
Xor-shift random number generator for Z80[QUOTE=Patrik Rak;320244]Come on, people, [URL="http://www.jstatsoft.org/v08/i14/paper"]xor-shift generators[/URL] devised by Marsaglia, that's the w…
...
ld l,a ; w = t
ld (rnd+4),hl ... 1 byte shorter and 4 T-states faster than the version posted ... -
BIFROST* Advanced Programming - part 5In my [URL="http://www.worldofspectrum.org/forums/showthread.php?t=40437"]previous post[/URL] I demonstrated how to move multicolor images smoothly i…
... think Bifrost gives you 20k T-states between interrupts?
That ... -
BIFROST* Advanced Programming - part 5In my [URL="http://www.worldofspectrum.org/forums/showthread.php?t=40437"]previous post[/URL] I demonstrated how to move multicolor images smoothly i…
... think Bifrost gives you 20k T-states between interrupts?[/QUOTE]
Correct ... hero animation takes about 10K T-states of a frame, and afterwards ...
