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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 …
simple plot:
[CODE]
call 022B0h;A=y,c=X
inc a
ld b,a
xor a:scf
bwlp:rra:djnz bwlp
or (hl):ld (hl),a
[/CODE] -
Drawing a dotted line...Hi Folks, I cannot be the first person to want this (?) so here goes! Does anyone have a MC routine that does the same as the BASIC DRAW command bu…
... $2307
LD A, C
CP B
... LD L, C
PUSH DE
XOR A
... L_24CB
L_24C4: OR C
RET Z
... /> EXX
LD A, C
DJNZ L_24CE
POP ... -
FUSE serial communication sample anyone?Hi, in [URL="http://manpages.ubuntu.com/manpages/precise/man1/fuse.1.html"]FUSE man pages[/URL] one finds switches for serial comms. By using --inte…
... /> srl d
rla
xor b
out (RS232_DTA),a ... =buffer size
ld c,#RS232_DTA ; c=data port
ld ... /> in a,(c)
in a,(c)
in a,(c)
< ... br /> [B]serial.c[/B][CODE]/*
* serial.c
* serial ... -
Block RoutineHi Folks, I want to draw a block on the screen dependent on providing the X,Y,W,H values. I came up with the following: [CODE]100 LET l$=" …
... ;set h limit
XOR A
a63068: LD ... value
ld a,c ;save row counter
... column counter
ld c,a ;restore row counter
dec c
jr nz,rowloop< ... -
Frames Per SecondHow many frames per second did the ZX Spectrum run at? I've found games that are 12.5fps but Ive recently been informed some games were at 25fps ...…
... [/url]
Keep hitting 'c' to create more sprites. The ... around them), some are XOR (sprite graphics XOR with background), etc. Because ... -
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]…
... generate a native 16-bit xor prng using some other triple ... follow what is happening in C++ somewhat for some of the ... a library of containers from C and I think I will ... same for random numbers, eventually. C++ now has a means to ... -
ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…
... , atof, ceil, compare, cos, cosh.c, dadd, dcompar, ddiv, deq, dge ... , fmod, fmull, fradd, fsub, ftoa.c, ftoe.c, hladd, hlsub, ifix, incr ... kind of sprite: masked, OR, XOR, LOAD, ATTR. If this were ... you proposed - needed only in C. Java or similar. In assembler ... -
ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…
... , atof, ceil, compare, cos, cosh.c, dadd, dcompar, ddiv, deq, dge ... , fmod, fmull, fradd, fsub, ftoa.c, ftoe.c, hladd, hlsub, ifix, incr ... kind of sprite: masked, OR, XOR, LOAD, ATTR. If this were ... -
ZX-Assembler file handling concept[QUOTE=clausjahn;777075]Dear readers, At this time, it's a good time to ask you, the future users, how to implement the file usage. Let's suggest so…
... ), OR (1/2 byte def), XOR (1/2 byte def), LOAD ... use it are written in C was a choice of the ... , people who are using the C compilers are already comfortable with ... people who are familiar with C would be the first to ... -
Issue 6 repair with a twist...(Starting with a slight grump - the forum ate my first attempt at this so this'll probably end up being a bit terse :)) I got a Issue 6 48K machine …
... ld a, b
or c
jr nz, .marchtest1.loop ... ld a, b
or c
jr nz, .marchtest2.loop ... , .marchtest3.next
xor a
MARCHBORKED
jp ... ld a, b
or c
jr nz, .marchtest3.loop ... -
Simple text scrolling routine...I'm having trouble writing a very simple text scroller, the idea is to use the ROM printer routine to print 32 characters each time the routine is ca…
... test
in a,(c)
rra:jr c,demo
ret ... /> scroll_text:
push hl
xor a
dup 32 ... -
Making noises with the AYHow do you go about making noises from the AY chip in machine code? I'm wanting to make a pulsating humming noise that increases in volume as you ge…
... D,(HL)
OUT (C),D
LD BC ... D,(HL)
OUT (C),D
INC HL ... JR NZ,waveloop
XOR A ; = LD A, ... BC,49149
OUT (C),A
INC D ... -
Game of Life.Last year (I think) or maybe the year before, I entered a Game of Life simulator into the CSS CGC compo but for the Sinclair ZX81. I decided to port…
... ld bc,17873
xor a
sbc hl ... />
ld c,18 ;C= 18 rows (1-18 ... 0)
ld c,a ;C =cell type
... 28B2 ;LOOK_VARS
jp c,$0670 ;"2 - Variable not ... -
Creating a linked list in Z80[FONT=Calibri][SIZE=3]I am using a circular buffer to store tiles to be displayed on the screen. Tiles only appear for a set period of time, so when …
...
ld hl,linkbuf
xor a
lp_ini
ld ...
ex_del ld a,c ;save new number of live ... -
LOAD "" CODE in machine code/store 128 bank dataHow do you LOAD "" CODE from machine code? I have written the following MC routine that fits into a REM statement in a basic program. I want to cal…
... ; set our screen colours.
xor a ; quick way to load ... ;16+6=22
out (c),a
ld hl ... a,#10 ;16
out (c),a
[/B]
;LOAD ... -
Alkatraz Protection System - "How to" and compo?I'm thinking about writing a "how to" regarding the [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0020807"]Alkatraz Protection System[/URL].…
... Loader:
[INDENT]1: XOR (RM+?)
2: SRL A ... bc, $7ffd
xor a
out (c), a
ld a ... /> ld a, $10
out (c), a
loop rlc (hl ... -
Ensure my interrupt handler begins at the same T-stateHi! Is there a way to ensure that an IM 2 interrupt handler starts always at the same T-state (related to the moment the ULA triggers the INT line, w…
... ; align ver.0.3 copyright (c) 2013 introspec
;
... br /> ;
; flag C indicates M1-delays as observed ... yellow" Scorpion.
; register C contains
; #11 for ... /> DoItAgain: ei ; 4t
xor a ; 4t
MeasuringLoop ... -
Snowfall effectHow do you go about creating a snowfall effect like the one in Yeti? Now don't laugh, I'm currently printing 32 UDG's of dots OVER the top of my gam…
... 're doing it. Changing to XOR might work better for you ... of screen yet?
jr c,drawsnowball
ld (ix+1 ... -
Snowfall effectHow do you go about creating a snowfall effect like the one in Yeti? Now don't laugh, I'm currently printing 32 UDG's of dots OVER the top of my gam…
... though.
The XOR solution will look naff because ... of screen yet?
jr c,drawsnowball
ld (ix+ ... /> cp bottom_ycor
jr c,missball
ld (ix+1 ... ld de,32
ld c,11
dblp2 ld b ... add hl,de
dec c
jr nz,dblp2
Which emulators support ULA+Tried ZX Spin 7.0, but its unstable. Tried to drag and drop .scr files onto it, but it comes out all wrong. Don't understand the TAP file that's sp…
... d,0
ld c,ZXIPORT
... ,ULAPLUSADDR
out (c),d
ld b ... br /> out (c),a
xor a
...RANDOMIZE - still not sure what it does...Whenever I wish a random number I use RND like: 10 LET a=RND*100 20 PRINT a 30 GO TO 0 and "a" will truly be random. But if is do the following: …
... AA xor d
171 AB xor e ...
065 41 ld b,c ... /> 079 4F ld c,a ; w = ...FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... with both an asm and c interface. It's untested but ... ]added print modes[/B] (OR, XOR, CLEAR and INVERT)
XOR/CLEAR/INVERT draw functions)
New Game(s): Sir Ababol 2 and Sir Ababol DXHere is our own Christmas Present from Mojonia! We weren't going to release these games (at least, by the moment) but we decided just yesterday to fi…
... jr plp
;
no_key xor a ;wait for no key ... )
and 31
xor 31
jr nz,no_key ... ret
;
get_key ld c,254 ;the highest port, 254 ... in both b and c
ld b,c
rdlp1 ... all ports
in a,(c) ;read that key row, ...Simple sprite inertiaDoes anyone have or can anyone point me to any good examples of sprite inertia (in assembly)? I'm not after anything vector related, just simple x,y…
... RET NZ
XOR A
LD (PL_XMOVE), ... CP PL_MAXSPEED
JP C, RETADDR
LD A ... CP PL_MAXSPEED
JP C, RETADDR
LD A ...Random object placementI'm looking for some advice on placing objects randomly in a game. I have a routine that reads a table and prints the corresponding object: 0 prints…
...
seed equ $-2
xor a
ld h,a ... #4a
neg
ld c,a
add hl,bc ...Random object placementI'm looking for some advice on placing objects randomly in a game. I have a routine that reads a table and prints the corresponding object: 0 prints…
...
seed equ $-2
xor a
ld h,a ... #4a
neg
ld c,a
add hl,bc ...Testers for new z88dk clibA long (long, long, long) time ago a few people offered to help test the new clib in z88dk. Much time has passed since then and I won't hold people,…
... ;--------------------------------------------------------
SECTION code_compiler
;sp1_exc1.c:61: main()
; ---------------------------------
... ld d,(hl)
xor a, a
sub ... ;sp1_exc1.c:107: }
ld d,(hl)
xor a, a ...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]…
... ,bc
ld a,c ; i = ( i + 1 ) & ... ,hl
ld h,c ; t = 256 * y
rnd_cy ... (rnd+1),a
xor a
ld b,a ... ,hl
ld h,c ; t = 256 * y
...
