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48k AudioI'm at the point in my game where I could use a few beeps and bloops. Ive been looking at loads of different speccy books, but this whole business of…
... off, what most people don't realise it that there's ... certain pitch. If you don't mind the sound being screechy ... />
Now if you don't mind just having some noise ... the screen display, 250-500 T-states (320-640?s) long. At ... -
Help with 1-bit sampled soundHi all, I've been sent over this way from the CPC Wiki forums as you guys may be able to help me more specifically with a programming query. Firstly…
... first draft and I haven't tried to compile anything yet ... , there's around 8-10 T-states of operation in part-prepping ... new value roughly every 31 T-States.
The sample is ... for the PDM isn't perfect to the T-State, but then ... -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
It's always worth remembering that JP (HL) takes only 4 t-states to run, where as the usual JP nn takes 10. It's therefore very useful for coding jump tables where a succession of CP n/JP nn would take far longer to process. -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
... JP (HL) takes only 4 t-states to run, where as the ... for different addresses. And don't forget that any JP (HL ... -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
... jp nnnn pairs takes 17 t-states to run, so by ... you've spent nearly 100 t-states.
(I appreciate that ... , the process takes 42 t-states, performs the same task ... different addresses. And don't forget that any JP ( ... ZX81, and so doesn't directly apply to the ... -
Z80 Asm EditorHi, I think this goes in here but if not then the mods can move it.... :) I have been knocking up a multi-tabbed, customizable docking editor for w…
... folder.
This shouldn't crash, but there will be ... assembly instructions
[MAYBE] - Show t-states for selected block
[MASSIVE ... -
JP (HL) confusionokay.... JP nn will jump to memory address nn. JP (HL) ,I assumed would read the contents of memory address HL and jump to the location and be a gre…
... thread, the process takes 42 t-states, performs the same task as ... this will execute in 32 T states, approx. 25% faster. If you ... be even executed in 28 T states while directly using LD L ... the ZX81, and so doesn't directly apply to the majority ... -
FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
... serial communication but I can't bit bang in emulator and ... thing' it seems you won't be using an IF1 for ... Fuse's serial emulation isn't strictly dependent on the IF1 ... line a fixed number of t-states after the start bit, and ... -
FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
... it seems you won't be using an IF1 ... 's serial emulation isn't strictly dependent on the ... line a fixed number of t-states after the start bit, ... there are cca. 29.36 t-states per bit which is sufficient ... bauds requires almost no wait states - perhaps two nop ... -
Address bus contents (i.e. PC) during execution of HALTI'm wondering if anyone can tell me what's placed on the address bus during execution of HALT, beyond the initial M1 cycle. The Z80 user manual state…
I don't know the answer you want, ... [/FONT] [FONT=sans-serif]four T states. The CPU will sample the ... -
LDI questionWhen using LDI (or LDD) is it possible to access the value that is transfered from (HL) to (DE), or does the Z80 use an internal data cache to store …
... and CPI both take 16 T-states as the CPI instruction isn ... 't having to perform a write ... -
LDI questionWhen using LDI (or LDD) is it possible to access the value that is transfered from (HL) to (DE), or does the Z80 use an internal data cache to store …
... and CPI both take 16 T-states as the CPI instruction isn ... 't having to perform a write ... M cycles if they don't repeat, so the fifth M ... -
New bicolour game coming very soon.And they say budget software houses can't afford to advertise :-D [IMG]http://i1142.photobucket.com/albums/n608/daveyboyhughes/elstompo_advertsmall_…
... 448 T-states. Also it has a "tolerance" of about 35 T-states ... executing a NOP instruction (4 T-states) for instance, you will ... a maximum delay of 3 T-states (if the computer has ... instructions take more than 20 T-states, thus causing longer interrupt delays ... -
New bicolour game: El Stompo.Phew! Finally finished my first game using Einar's fantastic Nirvana engine. [B]El Stompo.[/B] [IMG]http://i1142.photobucket.com/albums/n608/davey…
... />
Actually no, there isn't.
[QUOTE=R-Tape ... , in order to save enough T-states per row for sound. -
New bicolour game: El Stompo.Phew! Finally finished my first game using Einar's fantastic Nirvana engine. [B]El Stompo.[/B] [IMG]http://i1142.photobucket.com/albums/n608/davey…
... the right number of T-states on both platforms! On ... , and use the extra T-states to do something interesting! ... /> Of course, this doesn't really do justice to the ... are, partly 'cos I can't draw! :-)
... as this thread isn't really about the engine... ... -
A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... the right number of T-states on both platforms! On ... and use the extra T-states to do something interesting! ... /> Of course, this doesn't really do justice to the ... are, partly 'cos I can't draw! :-)[/QUOTE]
T-states anyway. I expect the ... -
5C series NTSC ULA 5C114E 8248Not sure if this has been mentioned before; I haven't seen anything about it online. Chris Smith's book discusses 6C011E as the NTSC ULA sold in Spec…
... ). Assuming this ULA uses 224 t-states per line and 264 lines ... -
SBC IX,DE/BCAlways wondered why there wasn't a SBC IX, DE/BC command.... so have to use PUSH HL ; save original HL PUSH IX ; IX on stack POP HL ; IX …
Though if you don't care about the contents of HL initially, then use POP HL/PUSH HL instead of the EX (SP), HL as it saves 17 t-states! -
what games have the best in game music?Just strikes me that many games I love don't have in game music, r type and chase HQ both have effective sound effects but no tunes. On the other ha…
can't compare AY and beeper, I mean programming wise to include it into a game timing wise is far trickier with a beeper.. sure there are examples of it , but decent things take up to much raster time.. err t-states ?!?! -
Space Harrier new loading screenHi, The original screen: [IMG]https://dl.dropboxusercontent.com/u/2616449/spectrum/SpaceHarrier.png[/IMG] and my new version: [IMG]https://dl.dro…
[QUOTE=zub;763634]Wow, hadn't realised this — it seems Elite ... started selling it in the States! :o
Even the ... the expense of raster time (t-states?) so you have that trade ... -
Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
... : That adjustment saved me 9984 t-states approx, :D -
30-column 8x2 multicolor (even in 48K)I don't recall any 8x2 multicolor routine for 30 columns that would work on all Spectrum models (including the Spectrum 48K), so I decided to write i…
... line.
Numbers are T-states starting from +0 (the last ... -
A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... you saying there were less T-States (and was surprised) and was ... -
A new full-screen bicolor engine called NIRVANA[I]OK, there's something I need to clarify first: Nowadays if you write [B]"multicolor"[/B] everyone assumes it refers to "multicolor 8x1" (an attri…
... Majikazo), and under around 5000 t-states.[/QUOTE]
You're ... -
Beautiful codeSome people see beauty or something sublime in maths formulas and equations, can anyone suggest examples of beautiful or sublime programming?
... , it means counting bytes and T-states. But in very large corporate ... -
ZX-Modules app reportZX-Modules app report If You are interested, I want to report about the state and progress about my ZX-Modules programs. I would like to report at l…
... taken?[/b] and adjust the t-state total accordingly.[/QUOTE]
T-State counting in loops).
Now, opcodes with different T-States are shown as e.g ... -
Help needed with calculating screen addressesCan anyone help me finally crack Jonathan Cauldwell's screen addressing calculator and, more to the point, is the reason I'm struggling because this …
Provided the Pixel Address Table is aligned to an even byte ($00, $02 etc) then 2 t-states can be saved thus, correct?
[CODE]LD E,(HL)
INC HL change to INC L
LD D,(HL)[/CODE] -
Help needed with calculating screen addressesCan anyone help me finally crack Jonathan Cauldwell's screen addressing calculator and, more to the point, is the reason I'm struggling because this …
Provided the Pixel Address Table is aligned to an even byte ($00, $02 etc) then 2 t-states can be saved thus, correct?
[CODE]
LD E,(HL)
INC HL change to INC L
LD D,(HL)[/CODE]
