-
using the out command to make sound on a spectrumi remember reading somewhere on how to use the out command to make sound. i cant find a reference to this anywhere online. i think it may have caused…
... ($fe) toggles the loudspeaker. Bits 0-2 of the same port ... border colour.
10 OUT 254,16
20 PAUSE ... 2
30 OUT 254,0
40 GOTO 10
using the out command to make sound on a spectrumi remember reading somewhere on how to use the out command to make sound. i cant find a reference to this anywhere online. i think it may have caused…
... /> 10 OUT 65533,7
20 OUT 49149,0
30 OUT 65533,1 ...
40 OUT 49149,100 ...
50 OUT ... 65533,8
60 OUT 49149,15
+3 - beeper sounds but no AY musicHi guys I am repairing a plus 3 revision 2 board that had no sound at all. Using schematics from https://zxnet.co.uk/spectrum/schematics/ I manage…
Try the following in 48K BASIC:
[code]10 OUT 65533,7
20 OUT 49149,0
30 OUT 65533,1
40 OUT 49149,100
50 OUT 65533,8
60 OUT 49149,15[/code]+3 - beeper sounds but no AY musicHi guys I am repairing a plus 3 revision 2 board that had no sound at all. Using schematics from https://zxnet.co.uk/spectrum/schematics/ I manage…
... /> 20 OUT 49149,0
30 OUT 65533,1
40 OUT 49149,100 ...
50 OUT ... 65533,8
60 OUT 49149,15[/code ...Randomised data samplingHere is something that could be written in BASIC, if anyone is interested. Lets say we want to sample a subset of a larger population, we can do t…
... [code]
3 PAPER 0: INK 7: BRIGHT 1
0
50 FOR r= ... /> PRINT "OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO":
FOR c=0 TO 31
53 POKE ... pip+1
56 NEXT c:
NEXT r
...Pseudocode for CIRCLE algorithm?Can anyone provide me with the pseudocode for the Spectrum's CIRCLE algorithm? My machine code knowledge isn't up to reading the ROM routine. I'm try…
... Interpolation Guides / Circle
(c)SerzhSoft, somewhere in 1994..1998 ... br />
10 BORDER 0: PAPER 1: INK 7: CLS ... 1010 LET b=r: LET c=0
1020 LET a=INT ... SUB 1500
1050 LET c=c+1
1055 LET ... br /> 1610 LET k=c: LET c=b: LET b=k
Tricks to make mirror image of a graphic?I've been working on a sprite routine for lots of sprites and animations. I'm only storing right facing graphics, and converting them to left facing.…
... /> ld b, 0
loop: ld c, 0
patchbit: bit 0, e
jr z, patch
ld a, c
ld c, a
patch: ld a ... (hl), $43
ld a, c
ld (de), a
how can we load +3dos files in assembly?is there some way to load +3dos files in assembly, like calling bios routines somewhere? (like defining in registers the filename string address in m…
... loaded with glitches when commenting out these push/pop
push ...
ld bc, 32765
out (c), a ;- do the actual paging ...Remainder (Mod) calculationsI've been figuring out how to calculate remainders after integer division by a constant divisor k (A mod k = A % k). I found that for most small di…
... c; // c accumulates the total bits set in v
for (c = 0; v; c ...Remainder (Mod) calculationsI've been figuring out how to calculate remainders after integer division by a constant divisor k (A mod k = A % k). I found that for most small di…
... ), same numbers used in your C code above, you can find ...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…
... /> ld b, 23
ld c, 0
; set attrib
ld ... /> ld b, 23
ld c, 1
push bc ; push ... /> ld b, d
ld c, e
push de ; push ... /> ld b, 23
ld c, 23
; set attrib
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…
[code]post ld de, [sprite name]
ld l, 0
ld c, 0
call sprite16x16a[/code]
Something like this?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…
... name]
ld l, 0
ld c, 0
call sprite16x16a[/code ...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…
It actually isn't sprite16x8a.
It's still sprite16x16a.
[code] ld de, [sprite name]
ld l, 0
ld c, 0
call sprite16x16a[/code]Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... /> ret
.needtoshift
ld c, 0
ld a, 255
ld b, a
ld c, 0
ld a, 7
srl c
srl c
srl c
add c
pop ...
srl c
srl c
srl c
add c
pop ...Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... ld b, 1
ld c, 0
ret
.noquit
ld b, 0
ld c, b
ld d ... ex af, af'
construct_new_line_data 0, 24
ret
. ... ret
.firingleft
dec c
max_life_movingL
ret z ...Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... /> ret
.needtoshift
ld c, 0
ld a, 255
ld b, a
ld c, 0
ld a, 7
srl c
srl c
srl c
add c
pop ...
srl c
srl c
srl c
add c
pop ...
