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28-character wide multicolour(ish) on 48k SpectrumLong-time lurker here... I've always been interested in rainbow effects on the 48k Spectrum, mainly from a perspective of "Just what [I]would [/I]ha…
... /> B: Ink Y, Background
C: Ink Y, Background
D ... /> DEFW 0
DEMO1 XOR A
LD (STRTLN),A ... /> LD A,B
OR C
JR NZ,DELAY
LD L,C
LD D,A
Z80 emulation C source with a permissive license?Could anyone recommend a good (all opcodes, proper timings) Z80 emulation code in C with a simple permissive non-viral license? Something without a w…
... timings) Z80 emulation code in C with a simple permissive non ...Optimize this: Distance CalculationBased on a taylor series expansion, suggested by NA_TH_AN, I've got this so far, which is far far faster than SQR(X^2+y^2) Formula is: in a right an…
... ; get original
CP C ; compare with C
JR NC, distance_Cbigger ... in A
distance_Cbigger:
; C was bigger, so we stick ... />
SRL C ; C=C/2
XOR A
LD B ... ,BC
SRL C
SRL C
AND A ; Clear ...What's wrong with this code ?OK, working my way through Jonathan Cauldwells 'How To' tome and I can't get the following to run in either spin or basin. ( iused the assembler in b…
... ; set our screen colours.
xor a ; quick way to load ... port 2.
in a,(c) ; see what keys are pressed ...CMWC random number generator for Z80Seeing the interest regarding the [URL="http://www.worldofspectrum.org/forums/showthread.php?t=23070"]Xor-Shift random number generator for Z80[/URL]…
... /showthread.php?t=23070"]Xor-Shift random number generator ... a * x(n-r) + c(n-1), c(n) = t div b ...
I have tested the C version of the generator with ... ; BASIC driver
ld c,a
ld b,0 ... a
ld h,c ; t = 256 * y
...A "bit" of a curiosityHaving to use a bit of m/code to do the AND in that key check function, I was prompted to revisit the "AND,XOR,OR,...for BASIC" topic and came up wit…
... prompted to revisit the "AND,XOR,OR,...for BASIC" topic and ... function to do bitwise AND,XOR,OR - not as m/code ... number
c = opcode = 0(OR), 1(AND), 2(XOR)
d ... DEF FN b(a,b,c,d,g,v)=g:
Simple AY library in z88dk/CI was interested to see if I could make the 128k AY chip work, and as there wasn't any library on it, I just made one for fun. It's certainly not th…
... l
#asm
ld c, 253
ld ... b, 255
out (c), h
ld b, 191 ...
out (c), l
#endasm
}< ... J
// Z X C V B N M
#include
#include "aylib.c"
uint periods[12 ...Any ideas on speeding up this assembler segment?It copies a pixel column of a rectangle which may be anywhere in the display file to a pixel column in d$. The source column may start at any bit pos…
...
inc b ; 4
xor a ; 4
scf ; 4 ... 0->7
dec c ; 4 C = pixel column scan depth ...Revisiting Spectrum CPU clock regenerationWarning: This post will be a bit nerdy :-) Some time ago, I experimented with phase locked loop circuits as a possible way to regenerate the Spectru…
... the Speccy sitting at the (c) screen, the PLL would nicely ... at the output from an XOR gate, which XORs the Spectrum ... if the result of the XOR gate is logic 'true' this ... apply instead of the simple XOR-and-nudge method of detecting ...Acrojet, wrong C-64 inlay displayedIn this game: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0000069[/url] The inlay displayed is the C-64 one, but there are spectrum ones …
In this game:
[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0000069[/url]
The inlay displayed is the C-64 one, but there are spectrum ones available.Paradroid for C-64, why not in the Spectrum?Reading the special 30th anniversary Retro Gamer, I came across this game which was considered to be the best game for the C-64, and it does not look…
... the best game for the C-64, and it does not ... a homwbrew game for the C-64 wich requires 14 floppy ...Kempston detectionI could use some help. This Kempston joystick behaviour drives me mad. I've written a game called Necrospermia recently ([url]http://www.worldofspec…
... ,(C)
BIT 0,A
JR NZ,StartAnim3
XOR ... joystick fire?
IN A,(C)
BIT 4,A
multi-scroll m/c subroutine for BASICArising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. whe…
Arising from recent posts, here's a scrolling routine that will manage multiple left/right scrollings for any (sensible) line width or step; (ie. where width isNew game from Kabuto Factory: "A.R.C.O.S."Hi everybody! After almost one year in production (...well... not so much... :roll:), we've got new release: A.R.C.O.S., a brick'em all with some sh…
... got new release: A.R.C.O.S., a brick'em ... possible. You control A.R.C.O.S., a spaceship which ... lives. In addition, A.R.C.O.S. has a laser ...Wanted C&VG scan issue 18 page 97as subject wanted - C&VG scan issue 18 page 97 just that page as a hi res scan 300dpi or more please many thanks in advance.
as subject
wanted - C&VG scan issue 18 page 97 just that page as a hi res scan 300dpi or more please
many thanks in advance.Graph Plothi! please, help with code: [PHP]For x=-100 To 100 For y=-100 To 100 If (x/2-25)*(x/2-25)+(y-50)*(y-50)<200 Or (x/2+25)*(x/2+25)+(y-50)*(y-50)<200 th…
hi! please, help with code:
[PHP]For x=-100 To 100
For y=-100 To 100
If (x/2-25)*(x/2-25)+(y-50)*(y-50)Tom and Jerry 2 showing the C-64 inlayThis game is showing the C.64 inlay: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0005314[/url] when there are 2 Spectrum inlays from the …
This game is showing the C.64 inlay:
[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0005314[/url]
when there are 2 Spectrum inlays from the spanish releases ;)WoS-style forum for programming in C?What's the nearest equivalent to the WoS forum for wannabe C programmers? Ideally with a similar mix of clueless newbies like me and wise old birds t…
What's the nearest equivalent to the WoS forum for wannabe C programmers? Ideally with a similar mix of clueless newbies like me and wise old birds to provide not-too-patronising insight.
Ditto Java?handy method for passing m/c parametersI knew that a single number or string parameter could be passed to a m/c routine with either: [b]LET a=b+USR address[/b] puts b on the calculator st…
... be passed to a m/c routine with either:
... method for passing two m/c parameters in a utility by ... b]
puts b & c on the calculator stack. Unfortunately ... address[/b]
puts b=c & d on the ... ]
puts b & c & d on the calculator ...HiSoft C ManualHello, WOS forum. I am looking for the raw images of the HiSoft C v1.3 manual. I have printed the manual that exist on WOS but I see a lot of mistake…
... raw images of the HiSoft C v1.3 manual. I have ... or something that makes HiSoft C compatible with residos, or is ...Idk>le me browsing through some game's code >..... [code]61A8 F5 push af 61A9 3EFF ld a,FF 61AB D37F out (7F),a 61AD D33F ou…
... 62C3
6227 4B ld c,e
6228 CDC362 call ... a,(3F)
6260 AA xor d
6261 0F rrca ...
6262 38FA jr c,625E
6264 3EFF ld ... rrca
62C7 38FA jr c,62C3
62C9 DB1F in ...New game: The curse of OddvilleDon't get too excited! :p Just wanted to share this because the coding of it is driving me mad, or rather the game designer is. The curse of Oddvil…
... utility I'm making called C.G.D (crap game designer ... /> It uses Patrick Rak's XOR Shift RND generator, and Einar ...C.G.D - Classic Game Designer[b]UPDATE: August 07, 2013 AN UPDATED VERSION OF CGD IS NOW AVAILABLE, DETAILS HERE: [url]http://www.worldofspectrum.org/forums/showpost.php?p=7155…
... uses Patrick Rak's superb XOR Shift random number generator. Thanks ...LZ4 decoderI encountered the [URL="http://code.google.com/p/lz4/"]LZ4 compressor[/URL] a few weeks ago. Reading the [URL="http://fastcompression.blogspot.co.uk…
... nibble are set
cp c
jr nc,.read_offset ; ... /> rra
rra
ld c,a ; copy into byte counter ... br /> ld c,a ; store in byte counter
xor 19 ; see ...Assembly - Loops bigger than 255Hi, It looks like it's a bit difficult to make loops with more than 255 cycles on Z80 machine code, since the 16-bit decrements (DEC) do not alter a…
... ; Load the higher byte into C
XOR A ; Prepare to test ... B is 0, then decrease C
JR Z,loop_high
loop_high:
DEC C
JP P,loop
Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
... cp 50h
jr c,NoAddHi
add a, ... cp 05h
jr c,NoAddLow
add a, ... br /> ret z
xor a
PrintDigit ld ...
