-
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... ROM1
ld b, 32 ; 32 characters in graphics mode
add a, 18 ; add offset
jr ... -
SCREEN$ bug fixI've been using the SCREEN$() function recently for reading data off the screen rather than taking up space with an array and I got fed up with the s…
... br /> ; Handles full 24*32 screen, up to 112 UDGs ... to check
add a,(ix+69) ;add 1st CHR$
... ScrFone:ld a,(de)
add a,(ix-18) ;=CHR$ adjustment ... ;DE=bitmap offset
add hl,de ;HL=bitmap address ... -
ZX Spectrum 48k - no CLK signalHello I'm trying to repair ZX Spectrum 48 mainboard issue 3B. When i check signal with oscilloscope on X1 or on ULA pin 39. I get stable 2V no clock…
... load down the crystal or add too much capacitance. It doesn ... clock output on ULA pin 32?
[I][B]Mark ... -
Troublesome routine, help needed!Having problems with this routine, it basically fires a rocket up the screen, but refuses to detect collisions. I'm using attribute blocks for detect…
... ADD HL, HL
ADD HL, HL
ADD HL, HL
ADD ... HL, HL
ADD ... LD DE, 22528
ADD HL, DE
LD ... DE, (bv1)
ADD HL, DE
LD A ... 21,15,32,32,22
rx6 defb 22,15,32,32
Finders Keepers+I know a few of you are interested in this project so I thought it was about time I started a proper thread for it rather than just slipping bits int…
... of Windows 7 (and maybe 32 bit. Something that comes with ... gives me the chance to add breakpoints and view registers etc ...Finders Keepers+I know a few of you are interested in this project so I thought it was about time I started a proper thread for it rather than just slipping bits int…
... of Windows 7 (and maybe 32 bit. Something that comes with ... gives me the chance to add breakpoints and view registers etc ...Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…
... /> struct sp1_Rect cr = {0, 0, 32, 24}; // rectangle covering the full ... empty
sbrk(50000, 10000); // add 40000-49999 to malloc
32
DEFB 128,113,128 ...
DEFB 128,114,192, 32,192, 51,192, 55
That painter thing..I'm struggling to think of a non clunky way of detecting when a 'box' has been surrounded and can be highlighted, like in the pic: [IMG]http://i1142…
... 1) ; -left col
add a,a ; *2
... row
add a,a ; *2
add a,b
add hl,de
ex de ...
ld bc,32
add hl,bc
...Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…
... /> struct sp1_Rect cr = {0, 0, 32, 24}; // rectangle covering the full ... empty
sbrk(50000, 3000); // add 40000-49999 to malloc
32
DEFB 128,113,128 ...
DEFB 128,114,192, 32,192, 51,192, 55
Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
...
[CODE]Copy 32 bytes level data
-------------------------
add hl,hl
add hl,hl
add hl,hl
add hl ... ,hl
add hl ...
ld de,udg-32
add hl,de
ld ...Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
... ;multiply level by 32
add hl,hl ;x2< ... br /> add hl,hl ;x4
add hl,hl ... ;x8
add hl,hl ... ;x16
add hl,hl ... should be udg-32)
add hl,de ;hl ... destination
ld bc,32
ldir
...Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
...
[CODE]Copy 32 bytes level data
-------------------------
add hl,hl
add hl,hl
add hl,hl
add hl ... ,hl
add hl ...
ld de,udg-32
add hl,de
ld ...Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
Slower but 22 bytes
[CODE] ld hl,51990
ld b,(hl)
ld de,$0020
push de
lp add hl,de
djnz,lp
ld de,udg-32-51990
add hl,de
ld de,55143
pop bc
ldir
ret[/CODE]Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
... ,$0020 ;
ld hl,udg-32 ;
push de ;save it ... use in BC
lp add hl,de ;
dec a ...Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
Faster; :smile:
[CODE] ld a,($CB16) ;level no.
ld de,$0020 ;
ld hl,udg-32 ;
ld b,d ;
ld c,e ;
lp add hl,de ;
dec a ;
jr nz,lp ;
ld de,$D767 ;
ldir
ret[/CODE]Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
... /> GetUDG: ld hl,UDGdata-32
ld de,32
ld a ... ,(LEVEL)
ld b,a
GetLoop:add ...Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
... /> GetUDG: ld hl,UDGdata-32
ld de,32
ld a ... ,(LEVEL)
ld b,a
GetLoop:add ...Simple memory transfer routineI'm looking for a simple memory transfer routine that shifts 32 bytes of data from the address HL is set to 55143, I have tried using LDIR, but cant …
19 bytes
[CODE] ld a,($CB16) ;level no.
ld bc,$0020 ;
ld hl,udg-32 ;
lp add hl,bc ;
dec a ;
jr nz,lp ;
ld de,$D767 ;
ldir ;
ret ;[/CODE]Documentation for SP1 for Z88DK?(I was going to post in [URL="http://www.worldofspectrum.org/forums/showthread.php?t=11729"]the other thread[/URL], so if a mod thinks this should go…
... /> struct sp1_Rect cr = {0, 0, 32, 24}; // rectangle covering the full ... empty
sbrk(50000, 3000); // add 40000-49999 to malloc
32
DEFB 128,113,128 ...
DEFB 128,114,192, 32,192, 51,192, 55
Collision Detection in SP1Hi, Does anyone have a well-documented example of using collision detection in spritelib. I've search WoS and Z88DK forums but no joy. Something wi…
... br /> add a,a
add a,a
add a,h ; add vertical ... /> struct sp1_Rect cr = {0, 0, 32, 24}; // rectangle covering the full ... , 15,224, 25,192, 32
DEFB 128,113,128 ... /> DEFB 128,114,192, 32,192, 51,192, 55
Collision Detection in SP1Hi, Does anyone have a well-documented example of using collision detection in spritelib. I've search WoS and Z88DK forums but no joy. Something wi…
... /> struct sp1_Rect cr = {0, 0, 32, 24}; // rectangle covering the full ...
add a,a
add a,a
add a,h ; add vertical ...
add a,a
add a,a
add a,h ; add vertical ...Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …
... B] data [B]!=[/B] 32 [B]&&[/B] ... data & %01000000
add hl, de
ENDIF
add hl, de
ENDIF
add hl, de
ENDIF
Small demo to show my sprite engine for ZX Spectrum 48KThis demo shows 13 sprites moving at 50fps totally flicker free: 12 enemies bouncing in edges and the main character, controllable with OPSA (note S …
... IF data & first
add hl, hl
IF data ... & second
add hl, de
ENDIF
32 && data != 64 & ... data-8 )*(data-16)*(data-32)*(data-64)*(data-128 ) ...Please explain how a Kempston interface circuit works.Can someone help me understand how a Kempston joystick interface works, as I want to design and build my own as an experiment. I understand switches…
... IN 31 return 0, not 32, when idle. Or are these ... the other.
Or add a OR gate chip, which ...Clearing 22 lines of the screenHow do I go about clearing the top 22 lines of the screen and leave the bottom #0 area untouched? I have a routine to reset the attributes, but cant…
... or delete
ld b,32 ;32 bytes to delete per line ... ;check low byte
add a,32 ;next row down within a ... down a segment too
add a,8 ;and they are ...mirroring bitsIf I have a string of 1408 bytes, each of which has one bit 'b' set, what's the shortest way of mirroring that string, so that each bit set at positi…
... ,ef,df,bf,7f
add a,0
daa ; -> ... ,85
srl a ; -> 32,31,30,2b,2a,22 ...ULA snow effectIt's wintertime, you know. [quote="http://ramsoft.bbk.org.omegahg.com/floatingbus.html"]when the I register falls in the range 0x40-0x7F then the UL…
... 96T
dup 32
nop ;4*32 128T
edup< ... ;4 this sets A to 32 every 8 iterations
and ... 32 ;7 (sets it to 0 at other times)
add ... 31
Line 8: 32,33,34,35 ... 63
32. Generally manifests as part of ...mirroring bitsIf I have a string of 1408 bytes, each of which has one bit 'b' set, what's the shortest way of mirroring that string, so that each bit set at positi…
... /> rrca
and 0fh
add a,5
ld l ... OP was asking for the "shortest" answer, so this is just ...Pac-Land: can be coloured?All versions of this game are full coloured, but not the Spectrum version. It has large sprites, but maybe the scroll is too fine to make a coloured …
... /> RRCA
RRCA
ADD A,80
LD D ... /> REPT 640 ;20 rows * 32 columns
.BYTE 0
LD A,H
ADD A,156 ;go to attribute ... br /> LD B,0
ADD HL,BC
EXX
LD A,H
ADD A,156 ;go to attribute ...hash function permutation tableI'm using a simple Pearson hash function to generate keys for a $(103,6) array using a 256-byte permutation table. How do I arrange the entries in th…
... the XOR. It just uses add instead.
[code]
32,5,26,0,15,56 ...
