-
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... faster
OLD:
T
11 push de
10 ret
tot = 127 T states
NEW:
10 ret
total = 122 T states -
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... occurs!!!)"
I don't attempt to count a single ... a Z80 manual with the T states to hand this is a ... -
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... /> jp z,or_fim2
jr nc,dym
ld a ... /> ld b,l
jr startver
dym: sub e ...
AND 7
jr nz,nexty
ld a,l ... /> ld a,1
jr z, or_pixel3 ; pixel is at ... -
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... rrca
inc l
jr nz,lp_mpt1
inc h
inc l
jr nz,lp_mpt2
inc h
and #07
jr nz,$+12
ld a,e ... -
Assembler code from tutorial, problem!I was wondering if anyone could help me decipher this z80 assembler code? ORG 60000 LOAD 60000 EA60 21BCEA LD …
hi arjun and look again. there is 'JR NZ' so the results would be 81h, 85h, 0dh and 80h unless there is more after the label change... -
Assembler code from tutorial, problem!I was wondering if anyone could help me decipher this z80 assembler code? ORG 60000 LOAD 60000 EA60 21BCEA LD …
umm..but the JR NZ would be exectued only if ... will result in a failed JR NZ (since comparison fails) and will ... -
Assembler code from tutorial, problem!I was wondering if anyone could help me decipher this z80 assembler code? ORG 60000 LOAD 60000 EA60 21BCEA LD …
... to machine code basics:
jr nz would be executed always, but ... with the instruction after the jr nz
if the zero flas ... />
and you've mistaken jr nz for jr z which acts inversely... -
Assembler code from tutorial, problem!I was wondering if anyone could help me decipher this z80 assembler code? ORG 60000 LOAD 60000 EA60 21BCEA LD …
Right. I had indeed gotten the JR NZ and JR Z mixed up!
Happens to me all the time! [img]/__forums/images/smiles/icon_frown.gif[/img] .
My mistake! -
spectrum mode smiilar to c64?i dont know much about machine code assembler routines, zilch actually to be honest, ive always fiddled with basic on my spectrum, only doing maybe a…
... it takes only a few T-states, but it works only on ... -
WANTED: tape replacement for +2?Any tape replacement possible for a +2? My +2 works wonderfully but the incorporated datacorder is simply worn out and won't load ANYTHING. Dirty sig…
... faster programs the situation isn't so simple, as there is ... from approximately 180 T states (about 50 microsec) to 2800 T states (about 800 ... -
TZX to TAPIs there an application for the mac which will convert TZX files to TAP? I've searched around but can't find any.
... by the CPC (fixed t-states between CPC changing the state ... but does this doesn't matter much as from ... reason those CSWs can't be converted, if the ...
[/quote]
isn't the only reason we want ... br /> [/quote]
isn't the direct recording block good ... -
adding colourThis my sound like a real stupid Q but when programing a picture how do i add colour like filling in shapes with colour. What kind of programming sh…
Spectrum musichello, I was wondering if anyone had released some kind of music sequencing software for the spectrum? if so, can anyone point me in a direction of …
... by as little as 16 T-States (44100Hz is 79Ts) then a ...ZX Spin 0.4 available for Download.Standard Cut-n-Paste from the CSS post: If all goes well, I'll upload it to WOS on monday. ----------------------------------------- Okay, it's th…
... are more interested in more T states per frame and hence less ... contended memory and processor wait states/clock halting.
Fraser ...Castlevania ZX looking REALLY nice in color :)[url="http://www.redeya.com/bytemaniacos/castlevania.html"]http://www.redeya.com/bytemaniacos/castlevania.html[/url]
... a faster Z80 (where more T States are executed per screen frame ...Castlevania ZX looking REALLY nice in color :)[url="http://www.redeya.com/bytemaniacos/castlevania.html"]http://www.redeya.com/bytemaniacos/castlevania.html[/url]
... that basically you have 448 T states between each update (working from ... first attribute map. After 448 states two lines are drawn. You ... attribute set, wait another 448 states, then do the 3rd etc ... claws back a load of T States for use elsewhere).
Horizontal scrollDoes anyone know how to do a 2 or 4 pixel left or right horizontal scroll of the spectrum screen. I can make a 1 one pixel scroll with: ... rl (hl…
... )
dec l
= 34 T states
ld a,(hl ... /> dec l
= 32 T states
As RLA is ... /> (note, just realised that won't work as you loose the ...Horizontal scrollDoes anyone know how to do a 2 or 4 pixel left or right horizontal scroll of the spectrum screen. I can make a 1 one pixel scroll with: ... rl (hl…
... /> I should note opinion doesn't come into it - I use ... [/url] page to calcuate the T states taken by a routine.Horizontal scrollDoes anyone know how to do a 2 or 4 pixel left or right horizontal scroll of the spectrum screen. I can make a 1 one pixel scroll with: ... rl (hl…
... /> ...
ex (sp),hl ; don't change sp but get screen ... the main loop is 90 t-states.Fake screenshots? No - now it's REAL screenshotsOk then. A few weeks ago I said I will show You the new gfx-mode of Speccy and - here it is: [url="http://republika.pl/hooy_prg/hprg.zip"]http://rep…
... /> gasman said 2x1 isn't possible, i guess ill take ... pixels - and you can't even manipulate memory that quickly ... if this method isn't as fast and flickers ... br />
I don't see how it's achievable ... it will take around 100000 T-States to copy a screen from ...Fake screenshots? No - now it's REAL screenshotsOk then. A few weeks ago I said I will show You the new gfx-mode of Speccy and - here it is: [url="http://republika.pl/hooy_prg/hprg.zip"]http://rep…
... it will take around 100000 T-States to copy a screen from ... things those, i don't know why programs have those ...
okay. i wasn't disputing that, i only spoke ... too, but I don?t believe that his routine ... ! Geeeeez ) you don't even imagine how many coders ...Parasol Stars for Spectrum Having played a lot of Bubble Booble and Rainbow Islands on Spectrum, and later on also Rainbow Islands and Parasol Stars on Amiga, I feel like it w…
... the screen, which takes 69888 T states to draw.
You have ... memory loading instruction takes 7 T states, that means that [I]theoretically ... [/I] the shortest number of T states it would take to load ... means you now have 48384 T states to fit your game in ...Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…
Parasol Stars for Spectrum Having played a lot of Bubble Booble and Rainbow Islands on Spectrum, and later on also Rainbow Islands and Parasol Stars on Amiga, I feel like it w…
... can draw to the screen, t-states and all that techy stuff ...Who want to remake Double Dragon?Seeing as the Speccy version was crap (see my review: [url="http://www.gamestyle.net/retro.php?article=31"]http://www.gamestyle.net/retro.php?article…
... updated at least every 436 T-states - noting that it will take ... a few states to update the sound status ... do.
Hence I don't see this as practical.Who want to remake Double Dragon?Seeing as the Speccy version was crap (see my review: [url="http://www.gamestyle.net/retro.php?article=31"]http://www.gamestyle.net/retro.php?article…
... interupt your software every 436 T-states minus the time it takes ... would estimate maybe 30 odd T-States.
For the AY you ... will take up slightly more T-States. For all channels mutliply by ... . An estimate of oh... 200 T-States say.
So for beeper ...Who want to remake Double Dragon?Seeing as the Speccy version was crap (see my review: [url="http://www.gamestyle.net/retro.php?article=31"]http://www.gamestyle.net/retro.php?article…
... hear (since human ears aren't sensitive to such low frequencies ... ) and won't sound like much more than ... 3.5MHz cpu, about 438 T states or somewhere every 70 machine ... hard to do. I won't say impossible though.
128 Memory PagingI'm having a problem getting my brain around paging. Well, actually the bit I don't understand is how reading I/O ports works! I hope the collective …
Adding to the WOS archiveI've just had my first foray into the world of MakeTZX. And apart from it recognising the initial "Program:" block as a Turbo Loading block (how, why…
... TZXes OK, but still doesn't load. However, I know the ... into Warajevo, so it shouldn't be a problem making a ... it, but I don't. I can't make my own custom ... about all this T-states malarkey, and I can't make OUT files ... to be authentic? I can't guarantee that, but I ...
