-
Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…
... shorter, just fill the remaining bytes with NOP.
However ... fit 10 characters into a 256 byte page instead of only ... zero, or at least 3 bytes should be equal, then you ... -
Fastest redraw of screen from UDGsHere's a question for everyone, to generate a bit of code to be used in games: On a standard 48K Spectrum, what's the fastest way to redraw the scre…
... zero, or at least 3 bytes should be equal, then you ... fit one more in each 256-byte span. You might if ... /> INC L
RET ; 25 bytes instead of 26
256 byte sets is then you ... number from 2..9 * 25 bytes. -
ZX Alien BreedNot sure if this has been mentioned already (I did trawl the threads but couldn't see anything :smile: ), but I've always hankered after a Speccy Ali…
... , or[B] 7.110 [/B]bytes.
* However, levels ... , or [B]11.424 [/B]bytes.
So raw ... ]bytes. But that's if you have a maximum of [B]256 ... another [B]9.216 [/B]bytes. So that's [B]50 ... total, for 4 levels and 256 tiles shared between them. But ... -
SpectranetHi all, I just bought a spectranet card and have a couple of questions I hope someone can answer for me. I have played around with it on both a +3 …
... , so the suspicious number is 256, not 512!
My ... a read starts on the 256 byte mark (or multiple thereof ... a read and returns zero bytes (and therefore, in my original ... -
Relocation with SDCCI desperately need auto- relocation with SDCC. Something that will compile all of my code using start address 0 and generate relocation table so that…
... , the fact that both low bytes are the same can be ... be fixed up to a 256-byte boundary.
Note ... -
File comparitorI thought Taper might do it but its not quite what I was after. Unless I misunderstood that shows if tapes are identical or not but not the differenc…
... blocks from +3 disk 32 bytes at a time so it ... if not; only mis-matched bytes are printed. Printable characters are ... "miniset-LH"CODE VAL "32512+256":
LOAD "miniset-RH"CODE ... VAL "33280+256":
CLS : DIM r$(k2 ... -
Outrun Europa in colour - Level 1 ready !Instead of bumping these old threads: [url]http://www.worldofspectrum.org/forums/showthread.php?t=10754&highlight=outrun+europa[/url] [url]http://w…
... /> [QUOTE]Block defined by 2 bytes
first byte is ... , values 0-3 make 0, 256, 512 or 768 added to ... -
Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …
... the window. Given your constraints, 256 byte window sounds about right ... to find the sequence of bytes that is the same as ... your current sequence of bytes. If nothing is found, you ... current algorithm operates not on bytes, but on the patterns themselves ... -
Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …
... a 256-byte buffer as the file is only 410 bytes; compression ... -
Z80 internal compressionThis isn't exactly a ZX Spectrum problem, but since WOS probably has some of the best Z80 coders in the world, I thought I might ask anyway. For my …
... as it only allows a 256-byte window (it does 51 ... . The demo program is 619 bytes + 60 + maximum match length (currently ... -
Machine code loopsDear all, 30 years too late I know, but I'm finally starting to get to grips with Machine Code - something I could never manage back in my early tee…
... , which takes a couple more bytes but has a much lower ... ]
ld c, [number of 256 blocks]
loop2:
; loop ... it will be treated as 256 by djnz.
So ... you do C*256+B loops.
Note ... -
How slow can a CF-card goSurprising. My 48k Spectrum did not allow me to CAT all the 254 files that my private DOS (for CF-card) can store in each sub directory. Spectrum get…
... when all requested 8 sectors (256* 16 bytes) are not yet read ... -
Where do you stick the stack?...OK, so I've got a fair chunk of ASM code assembled from 24000 mark. The stack shouldn't get very big, just a few PUSHes and POPs of the main regis…
... you don't need a 256 byte interrupt table as the ... attached which sticks its own bytes on the bus. (I know ... -
IZX: a new standard format and driver for ZX-Spectrum icons[B]IZX[/B] is a very compact and efficient standard format to create icons for the ZX-Spectrum. You can download it from here: [LIST] [*][URL="http:…
... at address 55200 with 41 bytes:
[CODE] 5 LET ... -
New game: Escape from CnossusHot on the heels of Spectral Dungeons, I give you a new roguelike, this time with graphics and more complex gameplay. [IMG]http://notimetoplay.org/w…
... create an array with 768 bytes with your new graphics and ... [B]Poke uInteger 23606, @gfxArray - 256[/B] before printing. When you ... banks. Just have a 168 bytes array per bank, and select ... -
generating a pre-defined list in an un-defined sequenceI've decided to become a drunkard, to which end I've been drinking a whole bottle of beer in one day (whereas normally I'd make it last 2 or 3 days).…
Actually you would need 256*192*2=98304 bytes since each screen coordinate ... can be represented using 2 bytes (X and Y coordinates). Thus ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... scratch without referring to LD-BYTES or other disassemblies. It's ... no edge is found after 256 iterations, returns both
;; carry ... -
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... br /> .edge_loop_start_pilot:equ 256-.pilot_pulse_max
.edge_loop_start_data:equ 256-.one_pulse_max
256 iterations,
;; returns zero ... s learn from
;; LD-BYTES without plagiarizing its code)
Scrolling by 2 pixelsWhat is the fastest way of scrolling a Spectrum screen line by 2 pixels left or right? When thinking about it I've come to this simple solution: [C…
... The 1st routine is 33 bytes and takes approx. ?????T between ... The 2nd routine is 65 bytes and takes approx. ?????T ... hl,16384
ld de,256-32
CHAROWRR:
... djnz PIXROWPP
ld hl,256-32
add hl,sp ...Scrolling by 2 pixelsWhat is the fastest way of scrolling a Spectrum screen line by 2 pixels left or right? When thinking about it I've come to this simple solution: [C…
... :
3 * 256 + 7 = 775 bytes
and the ... routine is just 94 bytes and takes 10800T from ... org 23296
SCROLL256PP: ;94 bytes, DI->EI = 10800T
PIXROWPP: ; get 8 bytes from the display & rotate ...Scrolling by 2 pixelsWhat is the fastest way of scrolling a Spectrum screen line by 2 pixels left or right? When thinking about it I've come to this simple solution: [C…
... is:
3 * 256 + 7 = 775 bytes
and the ... />
19 tstates * 255 bytes * 2 iterations +
22 tstates ...Scrolling by 2 pixelsWhat is the fastest way of scrolling a Spectrum screen line by 2 pixels left or right? When thinking about it I've come to this simple solution: [C…
... bytes
1 * di ; 4 1
1 * ld de,256 ... ; 20 1
;= 10006T =785 bytes
[/code]
... org 23296
SCROLL256PP: ;121 bytes, DI(c76.70c1)->EI ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... /> .timing_constant_pilot:equ 256-.pilot_pulse_max
.timing_constant_data:equ 256-(2 * .one_pulse_max)< ... ld c,0 ; we need 256 pulses
.detect_pilot_pulse:
... the number of
;; bytes remaining to be read
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... [B]"FF FF ... FF"[/B] (256 times)
[B]"FF ... format: a repetition of 2 bytes (usually the most frequent repetition ... ) is always encoded using 3 bytes, so there's a very ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... in blocks of 255 encoded bytes.
If you ... next block of 255 bytes
255 compressed bytes.
Sentinel for ... next 255 compressed bytes
etc.
< ... can't have 256 different values in 255 bytes.
There ...Movin And A Groovin Horizontal Flip improvementOn the left is the flip horizontal portion from Andy Pennell'S excellent Movin' & a Groovin' machine code screen routines from Your Spectrum #19 (Oct…
... in 227403T and takes 35+256=291 bytes (including the lookup table ... in 172107T and takes 165+256=421 bytes.Problem With POINT StatementHello everyone this is my first ever post, So firstly i'd like to say hello to everyone and secondly thank you to the admins for such a great site, …
... FN p(a)=PEEK a+256*PEEK (a+1)
.... program ... numeric expressions would save 66 bytes as well. The embedded data ...
