Hi
i made a dis-assembly from an 'zx 128' prog which is only zx128 by using the AY as 1bit sound engine
i took out the 'recorder' and the 'player' and rewrote them a little bit to make them shorter, relocatable and more equal in apraoch. so its NOT mine !! just working on it a bit
1 2022-12-22 19:35:39
Topic: disassembly of 'the voice 128' (1 replies, posted in Sinclair)
2 2022-06-05 23:59:31
Re: GSTQ (2 replies, posted in Sinclair)
btw its sinclair research and not just sinclair !!
Warning! The following errors must be corrected before your message can be posted:
At least 60 seconds have to pass between posts. Please wait a while and try posting again.
booh!!
3 2022-06-05 23:58:18
Topic: GSTQ (2 replies, posted in Sinclair)
Hi
just found this one on POUET
https://www.youtube.com/watch?v=xxUX54_8mQY
i dont know if the coder wrote the player aswell, i disassembled it a bit but i dot just put it online
it seems to have 3 players from which only 1 is used. it seems to have a data-table for multiple 1bit waves.
4 2021-01-08 16:40:12
Re: Dubstep generator (6 replies, posted in Sinclair)
SherzhSoft s version is close to it
and can be shorter as well ??
;http://www.pouet.net/prod.php?which=87664
;digital opera in 22-2 bytes
;Serzhsoft, 2 bytes removed by cborn
start:
ad00 di
ad01 ld e,c ; c from basic call = start adres
ad02 ld hl,0x5800
ad05 ld b,h
ad06 ld a,(bc)
ad07 ld e,a
ad08 add a,e
ad09 inc bc
ad0a dec hl
ad0b cpl
ad0c out (0xfe),a
ad0e sub (hl)
ad0f ld (hl),a
ad10 cp (hl)
ad11 jr z,ad05
ad13 inc e ; 'e' will be overwritten and this 'inc' can be removed, OR the loop has to be re-rwritten so it will be increased..... a puzzle!!
ad14 jr ad02
oops sudden rewrite?
in lower memory its funky!!
;http://www.pouet.net/prod.php?which=87664
;digital opera in 22 bytes
;Serzhsoft
start:
ad00 di
ad01 ld e,c ; c from basic call = start adres
ad02 ld hl,0x5800
ad05 ld b,h
ad06 ld a,(bc)
ad08 add a,a
ad09 inc bc
ad0a dec hl
ad0b cpl
ad0c out (0xfe),a
ad0e sub (hl)
ad0f ld (hl),a
ad10 cp (hl)
ad11 jr z,ad05
ad14 jr ad02
5 2021-01-07 21:46:18
Re: Dubstep generator (6 replies, posted in Sinclair)
like this one?
http://www.pouet.net/prod.php?which=87664
6 2020-12-26 23:09:33
Re: Welcome to the 1-Bit Forum (aka The Introduction Thread) (49 replies, posted in General Discussion)
Hi Utz
if i try to make one OUT (254) per scanline then that should give a hiss sound of about 1.5KB per second.
eg this is the start off the interrupt from Bordertron for 16k
; time counter
A_halt ld a,128 ; 7t background colour
out (254),a ; 11t[4,3,4] contended
ld hl,23672 ; 10t
inc (hl) ; 11t 256*1/50 sec max =5.12 seconds
jr nz,nsec ; 12t 7+11+10+11+12=52
t2a equ 7 +11 +10 +11 +12
; -5t
inc hl ; 6t
inc (hl) ; 11t
jr nz,nmin ; 12t -5+6+11+12=24 = 21.84 minute
t2b equ 6 +11 +12 -5
t2zx equ -5 +6 +11 +12 ; pasmo BUGGED RESULT ! the '-' sign is added AS LAST SUM INFLUENCE by which a false negative number is created !! https://worldofspectrum.org/forums/discussion/comment/967124/#Comment_967124
; -5t
inc hl ; 6t
inc (hl) ; 11t if 255 aswel, 93.20 hour =3.88 day's are done!
jr tdone ; 12t -5+6+11+12=24
t2c equ 6 +11 +12 -5
nsec jr $+2 ;12t
jr $+2 ;12t=24
t2b2 equ 12+12
nmin jr $+2 ;12t
jr $+2 ;12t=24
tdone:
t2c2 equ 12+12
t2 equ t2a + t2b + t2c ; =99t in 26 bytes
A_tc2 equ A_tc1 + t2
;big key check here
ld hl,keys+8 ;10t
ld de,keys2+8 ;10t to old key
ld bc,8 ;10t
lddr ; 8*21-5 t=163t
inc hl ; 6t
ld bc,0xfefe ;10t
ky in a,(c) ;12t 8 x contended
ld (hl),a ; 7t
inc hl ; 6t
rlc b ; 8t
jp c,ky ;10t
; 10+10+10+(8*21)-5 +6+10+ 8*(12+7+6+8+10)= 553 tstate = 2.46875 scanline !!Now i want to place that OUT 254 on the correct spot for a steady 224 tstate steprate. probably with an EXX. but, thats just the thought.
7 2020-12-16 20:00:54
Re: Welcome to the 1-Bit Forum (aka The Introduction Thread) (49 replies, posted in General Discussion)
cborn wrote:
Hello, i have not much to offer. my own sound code it 4-bits for ay. Bit i like asm and z80 code and hope to learn here. I made 2 or 3 dis-assemblies from 1bit speech. there is a 'crosover' routine that uses ay for its 1bit speech , its called "ble-ble' i think.
Hi Utz, not perse 1bit sound but i try to make a spot in it.
but its more the thoughed.
with a 224 scanline procedure you could have a 1 bit sound sqeuch
with about 320 scanlines and 50 frames thats only about 16,000 BITS per second,equ 1,8 KB per second ??
8 2020-12-14 12:52:20
Re: Welcome to the 1-Bit Forum (aka The Introduction Thread) (49 replies, posted in General Discussion)
Hello, i have not much to offer. my own sound code it 4-bits for ay. Bit i like asm and z80 code and hope to learn here. I made 2 or 3 dis-assemblies from 1bit speech. there is a 'crosover' routine that uses ay for its 1bit speech , its called "ble-ble' i think.