-
Vector drawing routines.Anybody could point me to some sort of vector drawing package of routines, callable from BASIC? With "vector drawing" I mean to draw 2D pictures with…
... as long as you don't use those you can ... start the program that doesn't have all that extraneous stuff ... in your path you won't need to
# alter ... ,(OPERATION)
or a
jr nz, DOLINE
.DOPFILL< ... it, though I haven't done it this way before ... -
Vector drawing routines.Anybody could point me to some sort of vector drawing package of routines, callable from BASIC? With "vector drawing" I mean to draw 2D pictures with…
... changed from last loop?
jr nz, bfloop ; keep going until incoming ... /> [/code]
I won't bother including "SPGetScrnAddr" (convert pixel ... "figure4.tap". It won't autorun so you'll have ... really fast. It doesn't rearrange the order of pixel ... -
New assember ideaAs i work with Eclipse IDE in my job i become more and more lazy. This leads me to idea that it is time to left Notepad+Tasm combo behind and move on…
... ,b
or a
jr nz, sizeok
ld a,c ... the project. If it didn't you'd be adding huge ... -
One Liner - Machine CodeHi Dr. BEEP, Digital Prawn, et. al., I think that what you guys have achieved with the one liner contest is absolutely amazing. It brought about wh…
... /> In the MC you don't have the problem with the ... you can use
some JR NZ/NC/Z/C to avoid ... -
One Liner - Machine CodeHi Dr. BEEP, Digital Prawn, et. al., I think that what you guys have achieved with the one liner contest is absolutely amazing. It brought about wh…
... /> In the MC you don't have the problem with the ... you can use
some JR NZ/NC/Z/C to avoid ... also agree that it doesn't strictly belong in the 1 ... -
Minigame Compo 2007Hi there, also this year, there'll be a minigame competition, open to all 8-bit computers and consoles. It consists on writing games whose size (…
... was found; otherwise
JR NZ,1BEC,REPORT-N check the ... . The AND +C0 essentially doesn't allow to jump to a ... /> AND +C0 be considered.
JR NZ,08AD,LD-PROG-1 Jump ... -
Game EditorsWell as the title says, this is a query about game editors, specifically the ones for Gremlin games... Many moons ago, Your Sinclair published (I th…
... ; f4ab 5f $04ts
jr nc, l_f4af ; f4ac 30 01 ... f4b1 fe 40 $07ts
jr nz, l_f4a9 ; f4b3 20 f4 $07 ... f4bc ed 52 $0fts
jr nz, l_f4c5 ; f4be 20 05 $ ... f4bc ed 52 $0fts
jr nz, rom2 ; f4be 20 05 $ ... good.
It doesn't work very well with ... -
help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
[QUOTE=Saboteur;250108]
jr nz,loop ; if not zero then goto loop
[/QUOTE]
Aarrggggh! Pet hate: Comments that just repeat exactly what the code says. Don't do it - it just makes things harder to read. -
help sought with first foray into machine code - pixel scrolldownI have started to code my first machine code program, a simple roadrace game. I've based it around the pixel scrolldown routine in 40 Best Machine Co…
... reached line2 yet?
jr nz, nextbyte ;carry on if ... t at the top of a group of 8 pixels
jr nz ... t at the top of a group of 8 pixels
jr nz ... be copied to?
jr nz,subtract ;if not, carry ... the top yet?
jr nz,nextline ;no, still some ... -
problem using FRAMES to generate 'random' numbersI realise the pros use bytes from ROM to get their random numbers, presumably because they want to use FRAMES to synchronise the printing and avoid s…
... as the 'car' (which doesn't work properly yet!) which made ... /> cp $01
jr z, moveleft
jr moveright[/code][/quote]
and 1
jr nz,moveright
jr moveleft
[/code] -
Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
...
DEC D
JP NZ, LOOP1
[/code]
... br /> OR A
JP NZ, LOOP1
[/code]
... faster indexing. And don't use the index registers. ... two versions take the same T-States.
I am ...
I will do a T-State count to see if ... -
Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
... /> CP C ; C = 192
JR Z, LOOP1
[/code]
CP C ; C = 192
JR NC, LOOP1
[/code]
T-States. -
JSW... how does the game "finish" in assembly?It seems the ZX and C64 versions of Jet Set Willy suffer from the same "unfinishable" problem. Thankfully the ZX version has been patched with pokes …
... 1, A
8F94 2026 JR NZ, #8FBC
8F96 AF XOR ...
but I don't know what it does. Maybe ... -
IF2 Rom snapshot creationHi, is it possible convert a Speccy 16k snapshot to a Interface 2 Rom file? I've the original Ultimate Pssst, Cookie, Trans-am and Jetpac tapes and …
... the keyboard routines don't seem to work. I ...
CP $0D
JR NZ,vload0
vload2:
; ... prmsg
DEFM "Can't load more BASIC!"
DEFB ... /> RET ;we can't deal with more BASIC yet ... /> ;the reloc3 code doesn't really do anything (LDIR has ... -
Spectrum Machine Language For The Absolute BeginnerNot quite sure if this should be in here but here goes. Having never delved into machine code before I thought id have a go at this book and its qui…
... and easier as you don't have to reconsile all of ... bc
dec d
jr nz, outerloop
ld d, 10 ... -
Spin send to assemblerIn the Spin (v0.666) debugger window, the view is something like this (with a symbols.txt file for labels/formating): [code][color=blue]LD_EDGE_2:[/…
The thing is, it wouldn't be like the debugger view ...
l_05e9: dec a
jr nz, l_05e9
[/code]
myspeccy.org - online gaming which auto-saves scoresIt's a blimmin' miracle - I'm most impressed.
... either.[/QUOTE]
Thanks, haven't tried it yet, but it ... fix
CP $00
JR NZ, L_5CB0
INC A
I didn't realise DTD had so many ... adding DTSupertest 128 first, don't know of any cheats in ...'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…
... demo. Not exactly what Frank T had in mind, but it ... ,b
or c
jr nz, attrfill0
; flick shadow ... ,b
or c
jr nz, attrfill1
; save old ... ,(23560)
cp 113
jr nz,flicker2
; restore paging ...VIC 20 emulation on the SpectrumI'm sure most people are aware of the my attempt at bringing the full Commodore experience to Sinclair users with the "Twenty Commodes" program. It e…
... the same approach, but couldn't free up the register to ... mainroutine the fastest. Don't know if this will be ... br /> bit n,c
jr nz,true
jp (hl)
t want to miss out on ... mapping.[/quote]
Don't do that. I will support ...Quotes from Speccy GamesTry to find this one: "No Sax please, We are Egyptians!"
... but I don't remember it?[/QUOTE]
t work unmodified ... br /> cp 69
jr nz, 33211
ld a ... /> cp 69
jr nz, 33211
ld a ...CSSCGC 2008 has now officially begunFor coming last in the 2007 crap game compo, I have the honour and privilege of hosting CSSCGC 2008! I have now put up the CSSCGC 2008 website at …
... your code.
I didn't take a look in the ...
bit 7,d
jr nz,loop
xor a
CSSCGC 2008 has now officially begunFor coming last in the 2007 crap game compo, I have the honour and privilege of hosting CSSCGC 2008! I have now put up the CSSCGC 2008 website at …
I've tried to beat 12 bytes and the best I can do is 13. My 11 byte attempt doesn't fulfill all the criteria (doesn't clear the lastChanging the way SCREEN$ is loadedThe way the speccy loads in a SCREEN$ is interesting - top two-thirds first, then middle and finally the bottom, which is due to the way the speccy d…
... screen line by line. Doesn't load from tape yet, ... check number of bytes
jr nz, drawline ; continue if 32
jr nz, nextline ; continue if hl = ... 1/3 screen drawn
jr nz, screenaddress ; draw next character line ...Screen access in assemblerI am again troubled by the unusal screen design of the Spectrum. :) If I want to do something with, say, a 16x16 bit block of the screen (in the sam…
... ,H
AND 7
JR NZ,OK
LD H,64 ... adddition to lower H isn't neededZX Spectrum (16K) sound/beepHi all, I think I'm in right place now, I've tried to find an answer how to generate two channel sound using ZX Spectrum 16K. Only think I've found …
... counter for first channel.
JR NZ,labl1 ; Do we play ... /> labl1: DEC L
JR NZ,labl2 ; Do we play the ... /> labl2: DEC D
JR NZ,labl3 ; Do we play the ... in the original, but isn't needed.
; db 00h, ...A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…
... br /> pop bc
jr LineScrolledUp
ScrollUpLastLineInScreen ... br /> cp 193
jr nz,ScrollDownLoop1
... pop bc
jr LineScrolledDown
... low byte of hl (can't carry)
A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…
... is why I didn't immediately spot the bug ... />
CALL MOVESTARS
JR MAINLOOP
OR C
JR NZ,STARLOOP1
RET
... br /> OR C
JR NZ,STARLOOP3
RET
... low byte of hl (can't carry)
...A scrolling starfield - help needed!I have been messing on my speccy again recently and tried to do a scrolling (parallax - maybe) starfield. I know how to scroll using machine code but…
... register pair, it wasn't much faster at all ... so this version doesn't use a lookup table.< ... 'x' ; x=quit
JR NZ,KEYTEST1
RET
JR NZ,KEYTEST2
LD A,3 ... low byte of hl (can't carry)
...Machine code help pls: LDI example[deleted]
... C
DEC C
JR NZ, Search
NotFound .......
... />
My question: Won't the Found code also execute ... too and will cause the JR Z, Found instruction to ... jump. I can't see how NotFound will be ... br />
CPI
JR Z,AISHL
JP PE ...Keyboard routinesI'll ask here first - since this must be a long-ago solved problem, and hopefully I can avoid re-inventing the wheel... I need a keyboard routine th…
... /> ld e,29 ; don't read symbol
notr8 IN ... ; NOW READ 5 KEYS
JR NZ,KEYP
LP_DEF RLC B ... br /> LPTR2 RR H
JR NC,GOTR2
DJNZ LPTR2 ... /> BIT 1,A
JR nZ,NOSS
ld a,e ...
