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Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... and find another few redundant T-states.
Here is my ... /> ; this takes 15T states, but save 21T states from PUSH and POP ... ]P[/B] nz,print_string ; ISN'T THIS FASTER THAN JR?
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
...
jp nz,print_string ; ISN'T THIS FASTER THAN JR?
Another 8 T states:
[code]
ld ...Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... =Dr BEEP;632096]Another 8 T states:
[code]
ld ...Between interrupts and handlersSee there's this short period of time immediately after an interrupt comes but [i]before[/i] the control is transferred to an interrupt handler, abou…
... . In fact, these 19 T-states doesn't begin just when the low ... . The INT acknoledge cycle won't begin until the current instruction ... ensures that the CPU won't miss an interrupt no matter ...rick robson (YS reviewer)I always liked his reviews. just browsing this one for Spike [url]http://www.ysrnry.co.uk/articles/spike.htm[/url] it says at the end: "*Ed's note…
... involving something like eating two Xmas dinners per day for a week ...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…
... to &38 takes 17 T states, which is the same as ...Is there a DD40 instruction?On this page: [URL="http://mdfs.net/Software/Z80/Exerciser/Spectrum/zexall.src"]Z80 instruction set exerciser for Spectrum[/URL] I noticed the belo…
This instruction is a redundant (slower) version of [B]LD B,B[/B] that takes 8 T-states instead of 4 T-states:
[url]http://www.ime.usp.br/~einar/z80table/[/url]Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... version, except mine is 4 T-states faster, 1 byte shorter, and ...Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... version, except mine is 4 T-states faster, 1 byte shorter, and ...Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... version, except mine is 4 T-states faster, 1 byte shorter, and ... />
Only if you don't mind about the "it can ...Good character sets ?Just wondering if anyone had any favourite character sets ? :) The one in SE basic is quite nice and I'm aware (I used to have it in my head I'm sur…
... nice but my +2 can't display those modes. And of ... ]
You can't do per letter colour, but you can ...Good character sets ?Just wondering if anyone had any favourite character sets ? :) The one in SE basic is quite nice and I'm aware (I used to have it in my head I'm sur…
[QUOTE=aowen;637079]You can't do per letter colour, but you can ...Received my divide but stumpedAfternoon guys I am now a proud owner of a complete divide (complete with case).I've worked out how to load my tap files but i am assuming .tzx doesn…
... state of port #FE in T-States (more like a WAV file ...Received my divide but stumpedAfternoon guys I am now a proud owner of a complete divide (complete with case).I've worked out how to load my tap files but i am assuming .tzx doesn…
... state of port #FE in T-States (more like a WAV file ...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…
... across the screen was 224 T states.
So I'd ... expected race_raster to be 224 t states long.
It seems ...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 ...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…
[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 ...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 ...
