-
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... /> .nextbyte
push bc
push hl
ld l, (hl)
call ltohexstr ...
inc de
ld bc, 31
ld (hl), a
ldir
scankeys:
ld hl, kbd_buff
ld bc, #FEFE
xor a ... -
How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…
...
in assembly:
LD HL, 32000 ;memory location for storing ... the number
LD A, 2
LD BC, 2 ; we ... before adding anything.
LD (HL), A ; stores the contents ... the location pointed to by HL
RET ; exits ... -
How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…
...
in assembly:
LD HL, 32000 ;memory location for storing ... the number
LD A, 2
LD BC, 2 ; we ... before adding anything.
LD (HL), A ; stores the contents ... the location pointed to by HL
RET ; exits ... -
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... /> ;EXX ;restaurar
ld bc,(tempbc)
ld hl,(temphl)
LD A,C ;
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... br />
..........EX DE,HL ; SGN X AND SGN Y ... TO HL (Q: IS D =0 ... routine:
SCREENPOS.LD BC,0
..........CALL PIXELADRESS ; ... plotted coordinate
..........LD (OLDXYPLOT+1),BC
..........LD (SCREENPOS),DE
...line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... this:
..........EX DE,HL ; SGN X AND SGN Y ... TO HL (Q: IS D =0 if ... :
SCREENPOS.LD DE,0
..........LD BC,0
..........CALL PIXELADRESS ...line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... /> ;EXX ;restaurar
ld bc,(tempbc)
ld hl,(temphl)
LD A,C
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... /> 7 ld h,(hl)
4 ld l,a
7 ld a,(bc)
7 or (hl ... )
7 ld (hl ... ),a
20 ld bc,(COORDS ...line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... /> ld hl,tad_asc
ld de,#4000
filltab push de
ld (hl),e ...
inc hl
ld (hl),d
inc ... hl
inc d
ld a ...line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... /> ld hl,PtsTab
ld a,#80
lp_mpt1 ld (hl),a< ... /> and #1f
ld (hl),a
inc l< ... ld b,#c0
lp_mpt3 ld (hl),e
inc h
ld (hl ...PAW questionThis may not be the right place but anyways there it goes: I've been trying to figure out how to import graphic files in .SCR format in the PAW parse…
... screens it's 2
LD HL,49152-2048*screensize +256 ; ... of the screen memory
LD BC,2048*screensize ; the size of ... memory with the information at HL
LD BC,256*screensize ; the size ... of the attribute data
LD DE ...ScrollingBit of a daft topic but anyway... Which game had the best scrolling? I would have to volunteer Commando and its silky-smooth scrolling. A particula…
... />
ld bc,020h
loop ldir
ld bc,020h ; rather ... /> sbc hl,bc
jr skip2a
skip2 ld a,l< ... first line
ld hl,5820h ; second line
ld bc,736 ; counter
ld hl,5001h ; last square
scl ld bc,31
...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... the printer.
Unfortunately the BC-reg must be larger than ...
........LD HL,TABLE-1 ; esc.code table
PRINT...LD B,(HL) ; B ... HL ; and HI returnbyte
........LD A,(HL)
........RST #10
........LD A,(HL ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... /> POP HL
EXX
LD C,B ; Set LSB of BC to ... in HL' and restore original HL.
POP HL
EXX
LD HL,(HL_Store ... )
LD B ...Machine Code ChallengeHere's a challenge for all you Z80 programmers. Points to be awarded for elegance and brevity. (I haven't got the solution either) HL addresses the …
... 48 4 LD C,B ; Set LSB of BC to B.
BC to 0.
800E 47 4 LD B,A ... 16 LD HL,(HL_Store) ; Restore original HL.
8025 7E 7 Next_byte LD A,(HL ...adding colourThis my sound like a real stupid Q but when programing a picture how do i add colour like filling in shapes with colour. What kind of programming sh…
... /> ld hl,#5800
ld bc,768
l1 ld (hl),255
inc hl
dec bc ...
ld a ...Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
... working in BASIC as only HL' is important (actually IY ... LD HL,HIGHBYTE ; table
LD DE,HIGHBYTE + 1
LD BC,257
LD A ... ,VECTOR ; IM2 vector
LDIR
LD I ... IY
EXX
PUSH HL ; preserve important registers
...Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
... /> LD HL,HIGHBYTE ; table
LD DE,HIGHBYTE + 1
LD BC,257
LD A ... ,VECTOR ; IM2 vector
LDIR
LD I ... /> it must be
LD I,A
;)Z80 AssemblerSome of you may know that I'm working on a Z80 assembler. I thought I'd start a thread so I can see what people think and what they might want to see…
... ,size
LD BC,@@3
LD DE,@@2
LD HL,@@1
LDIR ... instructions, so if you type LD, it shows all possible combinations ... from LD A,A to LDIR).[/quote ... defined when you type in LD the editor it would be ...Horizontal scrollDoes anyone know how to do a 2 or 4 pixel left or right horizontal scroll of the spectrum screen. I can make a 1 one pixel scroll with: ... rl (hl…
... to the screen location POP HL, you can shift (well ... left at least) with ADC HL,HL, using the previous carry ... the rightmost bit and PUSHing HL back onto the screen ... once (eg POP HL, DE, BC, IX, IY, BC',DE',HL' and rotate all ... SUB A,16 LD L,A LD SP,HL using A to ...Question about CP Z80 instructionSorry if this is the wrong folder, but it seems the most appropriate. When performing a CP instruction, is the P flag set when the compared values …
... />
ld hl,16384
ld de,32768
ld bc,16384
loop ld a ... + inc
dec hl ; but copy
ld (hl),a ; high to low ...
inc hl
jp ...Speccy machine code info where is it?Recently I've been trying to learn Z80 and I've managed to make limited progress (some of my routines even compile now!) but I seem to be having trou…
... (pressed or not):
ld a,0111 1111 ; row #7 ... the same thing:
ld bc,$7ffe
in a,(c ... very short:
If HL holds your screen address and ...Advice about drawing sprites on spectrum I've coded sprite drawing before and know all the theory about masks from a long time ago (microhobby rules! ;), but since I did it on Amiga with ha…
... />
pop bc
ld l,c
ld a,(hl)
and (ix ... +0)
ld l,b
or (hl ... )
ld ...
