-
Look whats possible in 924 bytesSo, finally after over a year of development and nearly 25 years since I first designed the graphics, I've actually made it to the point where this i…
... C WITH CONTENTS OF D
BIT 7,L ;IN HERE, WE ... ABSOLUTELY NEED BIT 7 OF L.
LD D,E ... ;LOAD D WITH CONTENTS OF E
L1 ... -
off screen bufferwhen using an offscreen buffer is the memory copied to the screen in a way that makes it easier to draw sprites to the buffer? E.g. Lets say you…
... bc
ld h,d
ld l,e ;point HL at corresponding ... above
ld a,e ;save DE left hand side ... under sprite
ld e,a ;DE back to left ... line
inc d
ld a,d
and 7 ...
ret nz
ld a,e ... -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... /> [code]
ld de,#7102 ;E = number of consecutive sync marker ... ,#0FFD
.lp1
ld l,e
.lp2
in a ... )
cp d
jr nz,.lp1
dec l
jr ... -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... 0FFD
.lp1
ld l,e
.lp2
in a ... br /> cp d
jr nz,.lp1
dec l
... .
Ideally, I’d like to tune it to ... padding instruction. (Originally, I’d hoped I could find one ... ” and everything goes haywire. :D -
1k Chess (was the 924 bytes thing!)Hi, I've decided to do a major rewrite of large parts of the code for the isometric Chess thing that I've been messing with. It got to the point, …
... height
add a,l ;
ld l,a ;
... ;save screen position
ld e,d
iy_store:
ld iy ... -
ive found an attr scrolling routine but i want to remove the smaller scroller within it, etc.https://pastebin.com/K4nG3xbX also i would like to be able to change the colours and not have a shadow. http://www.worldofspectrum.org/pub/sin…
...
LD H, D ; FA61 62
LD L, E ; FA62 6B
LD H, D ; FB0D 62
LD L, E ; FB0E 6B
ive found an attr scrolling routine but i want to remove the smaller scroller within it, etc.https://pastebin.com/K4nG3xbX also i would like to be able to change the colours and not have a shadow. http://www.worldofspectrum.org/pub/sin…
... /> LD D, H ; FB58 54
LD E, L ; FB59 ... ; A =m2character
LD L, A ; FAE1 6F
... LD H, D ; FB0D 62
LD L, E ; FB0E 6B ...Cubic RevealI just though I'd develop this a little further. Written a while ago on a whim! [img]https://dl.dropbox.com/s/p44y5dda49ucmop/square_reveal_1_1.gi…
... /> add a,d ;
ld d,a ;
... /> ld d,h ;
res 7,d ;
ld e,l ;point ... line up
ld l,e ;
ldi ; ...Cubic RevealI just though I'd develop this a little further. Written a while ago on a whim! [img]https://dl.dropbox.com/s/p44y5dda49ucmop/square_reveal_1_1.gi…
... />
ld d,h ;
res 7,d ;
ld e,l ;point DE ... ATTRs line up
ld l,e ;
ldi ;copy byte
Cubic RevealI just though I'd develop this a little further. Written a while ago on a whim! [img]https://dl.dropbox.com/s/p44y5dda49ucmop/square_reveal_1_1.gi…
...
res 7,d
ld a,l
ld l,e
ldi ...
ldd
ld l,a ...How can I make a UDG rotate?I designed a set of UDG's that can be used for making shapes or letters. Trouble is that my circle - for example - consists of 4 pieces and it would…
... SRL D
SRL E
SET 7,D
RES 7,E
LD D,(HL)
LD L,E
LD H,D
...Cubic RevealI just though I'd develop this a little further. Written a while ago on a whim! [img]https://dl.dropbox.com/s/p44y5dda49ucmop/square_reveal_1_1.gi…
...
res 7,d
ld a,l
ld l,e
ldi ...
ldd
ld l,a ...Less MIA - NARC (1990)(Erbe Software)[+3 Disk][re-release]Hi all :) SPA2 ?:) again ?:) in short ... box1 [img]http://forest.no-ip.org/wos/na/box1.jpg[/img] box2 [img]http://forest.no-ip.org/w…
D.L.M. = Déposito Legal Madrid, i.e. Legal Deposit at the National Library of Madrid; all published work must be submitted to one of the national libraries, Madrid in this case.Kempston Mouse DriverHi Folks, Does anyone know the email of Chris Cowley who wrote the Kempston Mouse Driver in the WOS Archive? Many thanks Paddy
... /> SRL D
SRL E
SET 7,D
RES 7,E
AND D
OR E
LD (HL),A ... A,(HL)
AND D
OR E
LD (HL),A ... )
LD D,(HL)
LD L,E
LD H,D
POP ...Printing text using direct screen addressingHaving some problems printing using the FASE engine which is currently defeating me. Hoping to have someone clear out the bit of fog currently dwell…
... h, a
ld a, e
rrca
rrca
ld c, e
ld b, d
set 7, b ... (bc), a
inc l
inc d
inc b
Drawing LinesHas anyone got any experience of coding a Bresenham line drawing algorithm on the Speccy? I've had a go and I find the algorithm has quite a few s…
... /> _VLOOP
inc l
sub d
jp c,_VD6 ... ret z
inc l
sub e
jp nc,_VV7 ... ret z
inc l
sub e
jp nc,_VV6 ... a=DY/2, e=DX but d=(DX-DY) instead of ... gt;DY lines with e=DY and d=DY-DX.
...Shrinky challengeInspired by this contest on c64: http://nurpax.github.io/posts/2019-08-18-dirty-tricks-6502-programmers-use.html Make the smallest possible .tap t…
... quote="Sol_HSA;955775"]I'd love to hear the ... )
0004 54 LD D,H
0005 01 ... /> 0008 1E 01 LD E,01h
000A C3 ...
[code]FF4E 6B LD L,E
FF4F 0D DEC C ...
FF50 56 LD D,(HL)
FF51 FF ...
FF56 14 INC D
FF57 C3 E8 ...What to write / programme?I've been trying to get back some motivation to write something in machine code for the Spectrum. I don't feel I am organised enough to write somethi…
What to write / programme?I've been trying to get back some motivation to write something in machine code for the Spectrum. I don't feel I am organised enough to write somethi…
What to write / programme?I've been trying to get back some motivation to write something in machine code for the Spectrum. I don't feel I am organised enough to write somethi…
...
LOOP LD (HL),E
INC H
... D
DEC H
INC L
INC D
LD A,D ... ADD A,32
LD E,A
JR C, ...Last Problem in Chapter 3 of Toni Baker's Mastering Machine Code on your ZX Spectrum.Chapter 3 of this great book is all about how to use the registers and covers the operations LD, ADD, ADC, SUB, SBC, INC, DEC, SCF and CCF. The la…
Last Problem in Chapter 3 of Toni Baker's Mastering Machine Code on your ZX Spectrum.Chapter 3 of this great book is all about how to use the registers and covers the operations LD, ADD, ADC, SUB, SBC, INC, DEC, SCF and CCF. The la…
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... do
LD (IX+0), L
LD (IX+1), H ... +nn),hl ; ld (ix+nn),l : ld (ix+nn+1),h ... /> ld hl,de ; ld h,d : ld l,e
