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Spectrum AssemblyHi All, Thanks for letting me in... lol Over the last couple of days I started playing my spectrum emu again and then I started thinking about lear…
Really? I need a fast window scroll routine in four ways, window is user-defined. Speed must be about 30000 T-states. Can some plastic ones made in Taiwan code that, please? -
Spectrum AssemblyHi All, Thanks for letting me in... lol Over the last couple of days I started playing my spectrum emu again and then I started thinking about lear…
... . Speed must be about 30000 T-states. Can some plastic ones made ... ?
30,000 T-states isn't a lot of time either ... -
Spectrum AssemblyHi All, Thanks for letting me in... lol Over the last couple of days I started playing my spectrum emu again and then I started thinking about lear…
... ?
30,000 T-states isn't a lot of time either ... cheating.[/QUOTE]
30000-40000 T-states for half-screen pixel 4 ... all the screen in 70000 T-states, so...
So :) Real ... -
Spectrum AssemblyHi All, Thanks for letting me in... lol Over the last couple of days I started playing my spectrum emu again and then I started thinking about lear…
... =Shadow Maker;308499]30000-40000 T-states for half-screen pixel 4 ... all the screen in 70000 T-states, so...
So :) Real ... in a frame, then doesn't that code just need cutting ... -
Spectrum AssemblyHi All, Thanks for letting me in... lol Over the last couple of days I started playing my spectrum emu again and then I started thinking about lear…
... =Shadow Maker;308499]30000-40000 T-states for half-screen pixel 4 ... all the screen in 70000 T-states, so...
So :) Real ... scroll the screen in 70000 t-states too... for a rigged demo ... faster than about 100,000 t-states for vertical (using LDI) and ... -
Fast screen writesI wondered what the faster than LDIR methods of writing to the screen were.
... . Firstly, you're spending 5 t-states on the "repeat" each time ... -
Fast screen writesI wondered what the faster than LDIR methods of writing to the screen were.
... . Firstly, you're spending 5 t-states on the "repeat" each time ... -
Fast screen writesI wondered what the faster than LDIR methods of writing to the screen were.
... the address bus for eight t-states every iteration. LDI only does ... -
12-pixel-wide font on 512x192 screenThanks to Geoff I have a working prototype for displaying this font in BASIC. Machine code to follow.
... and also means it doesn't matter where the column ... up consuming a fair few T-states.
For my ... the Spectranet, I didn't lay the characters on their ... a simpler routine which doesn't need to rotate the ... I'm on, I don't actually store the line, ... -
In-game music takes CPU time?If a 128k wants to have music played in-game using the AY sound chip, does that consume a lot of CPU time? What I am after is if the reason why man…
... so that you don't have to count t-states very accurately, and ... well planned out, you don't really need to use them ... notes though, so it needn't be too bad. I'd ... -
what were the things the Speccy architecture was good for?I don't know a hell of a lot about all the different computers hardware and I wanted to know if the way the Spectrum was built lent itself to certain…
... very different (read takes less T states).
i would say that ... games myself, Spectrum games don't seem to get much/any ... else useful that I haven't mentioned?[/QUOTE]
what i ... -
what were the things the Speccy architecture was good for?I don't know a hell of a lot about all the different computers hardware and I wanted to know if the way the Spectrum was built lent itself to certain…
... scrolling, someone said it doesn't do parallax, so would parallax ... very different (read takes less T states).
i would say that ... on the net, I don't know anything about CPU's ... -
A List Of Zx Spectrum Music EditorsWell, not for me actually, as 99,99% of them are for AY, covox and GS cards but several times some people asked about music editors for ZX Spectrum. …
... with a fixed number of T-states?[/QUOTE]
You need player ... replay using fixed number of T-states. -
A List Of Zx Spectrum Music EditorsWell, not for me actually, as 99,99% of them are for AY, covox and GS cards but several times some people asked about music editors for ZX Spectrum. …
... on INT using a fixed t-states routine. After that you can ... -
Difference in emulator screen sizes and coloursSeeing as Greencard's gone out drinking... I've done a comparison between Spectaculator and ZXSpin. ZXSpin's full screen with border is taller than S…
... . Each line takes exactly 224 T states.
After ... this takes 224 T states. Every half T state a pixel ... 128 T states of screen, 24 T states of right border, 48 T states of ... horizontal retrace and 24 T states ... -
Difference in emulator screen sizes and coloursSeeing as Greencard's gone out drinking... I've done a comparison between Spectaculator and ZXSpin. ZXSpin's full screen with border is taller than S…
... too much. This still doesn't answer the question of why ... (64+192+56)*224=69888 T states long and as you say ... -
Difference in emulator screen sizes and coloursSeeing as Greencard's gone out drinking... I've done a comparison between Spectaculator and ZXSpin. ZXSpin's full screen with border is taller than S…
... (64+192+56)*224=69888 T states long and as you say ... -
ZX81 tape formatIs there a description of it somewhere? The TZX format doesn't give it but can it be worked out from what it says about block 19? There is a good d…
... (each pulse is
~ 637 T-States long). After each series of ... -
Why did the QL fail?Browsing some old magazines: an advert appeared for the QL, 128k of ram and 32 bit processor etc...also very cheap compared to other similar spec com…
... 3 M-cycles and 11 T-states, but ADD A, B takes ... 1 M-cycle and 4 T-states.
The 68008 is ... -
TAP filesI'm trying to figure out how to make TAP files and am none the wiser. Tried downloading Taper, got it working but it was one of the unfathomables. I …
... take the same number of T-states as the equivalent 8-bit ... -
TAP filesI'm trying to figure out how to make TAP files and am none the wiser. Tried downloading Taper, got it working but it was one of the unfathomables. I …
... take the same number of T-states as the equivalent 8-bit ... about this ;) and I can't find a better place to ... /64 bit machines, they aren't certainly defined as 64 bit ... rules over it and doesn't let it go much further ... -
Clearing the Carry flagI'm reading that sometimes I may want to clear the carry before using ADC or SBC. A simple AND A or OR B will do. However, as I see it, for 8-bit ar…
... of two, and in four T-states instead of 7. So even ... in code where performance isn't all that important, you see ... -
CSSCGC 2008 has now officially begunFor coming last in the 2007 crap game compo, I have the honour and privilege of hosting CSSCGC 2008! I have now put up the CSSCGC 2008 website at …
... to CSSCGC which just wastes T-states).
I still want ... the BBC emulator. I won't release it for CSSCGC 2009 ... - as I don't intend it to be crap ... -
Thinking in Assembly (first efforts)The following is one small routine to educate myself on a few concepts (jumps, flow control, routines, CPI): [code]searchmem xor a …
I'd change this though:
[quote]
push hl
pop bc
[/quote]
to this:
[quote]
ld b, h
ld c, l
[/quote]
The former takes 22 T-states, the latter only 8. -
MultichromeIt turns out that multichrome, and other screen modes, are emulated in Fuse and Eightyone via ZX Spectrum SE emulation (which is similar to the TC214…
... />
This way, you don't even need to write to ... 224 (or is it 228?) t-states. You could even do something ... -
MultichromeIt turns out that multichrome, and other screen modes, are emulated in Fuse and Eightyone via ZX Spectrum SE emulation (which is similar to the TC214…
... ;333876]This way, you don't even need to write to ... 224 (or is it 228?) t-states. [/quote]
Yup, that ... -
DivIDE on Spectrum +3Hi all, Is it possible to use the DivIDE on the Spectrum +3 in 128K mode? I have the 'A' jumper set on the board, but my +3 resets into 48K mode wit…
... only ever active for 3 T-states at a time and those ... -
Interrupts - been a while !Not sure if this is the right place for this (1st post on WOS, but been a speccy user since Dec'84 :-o (yes I am that old ! :p) ), But I can't for …
... " instantly, when testing it! Saving T-states!
Oh, hell! I ... />
EDIT - my fingers don't work too good anymore! -
AY tracker routineHi. Yesterday i played with some ay tracks and was surprised how big are tracker routines and music data (over 1.5KB for Pro Tracker routine and 4-6 …
... and less than a thousand t-states per interrupt.
On ...
