using rnd from bios mathpack

nitrofurano

Karoshi Maniac

Mensajes: 259

using rnd from bios mathpack

« : 08 de Enero de 2006, 09:33:57 pm »

hi!
after unsuccessfully trying Robsy's suggestion for rnd in assembler (sorry, man...) - i started to try using the rnd routine from bios mathpack - otherwise i didn't tried with CBios yet (i think wouldn't work)
btw, i'm not sure if the random amplitude is fine, maybe the code needs some adjusts (it uses only 2 'call' commands to bios addresses, and gets result from msxbasic variable area)

Código:

;- rnd mathpack experiments from Paulo Silva
;- (this code may have stuff from Milos Bazelides, Robsy Petrus and Alfonso Dioniso)
;-----------------------------------------------
;- asmsx startup
.bios
.page 2
.rom
.start INICIO
;-----------------------------------------------
;- vram address labels
CHRTBL equ 0x0000
NAMTBL equ 0x1800
CLRTBL equ 0x2000
SPRTBL equ 0x3800
SPRATR equ 0x1B00
DAC_02 equ 0xF7F8
;-----------------------------------------------
;- declaring variables
.page 3
V_DELAY: ds 2
V_TMPR: ds 2
V_1A: ds 2
V_2A: ds 2
V_3A: ds 2
V_4A: ds 2
S_DEC01: ds 5
S_DEC01_E: ds 1
;-----------------------------------------------
;- code start
.page 2
.org 0x8010
INICIO:
;- V_DELAY=400 (50=1sec)
ld hl,V_DELAY
ld de,400
ld [hl],d
inc hl
ld [hl],e
;- COLOR 4,6,12
ld hl,0xF3E9
ld [hl],4
inc hl
ld [hl],6
inc hl
ld [hl],12
;- SCREEN 2,2
call INIGRP
ld bc,0xE201
call WRTVDP
;- copy pattern to 3 blocks of screen2 (size 12*6 bytes= 72bytes)
ld hl,PTTRN1
ld de,CHRTBL
ld bc,256*8
call LDIRVM
ld hl,PTTRN1+0x0800
ld de,CLRTBL
ld bc,256*8
call LDIRVM
ld hl,PTTRN1
ld de,CHRTBL+0x0800
ld bc,256*8
call LDIRVM
ld hl,PTTRN1+0x0800
ld de,CLRTBL+0x0800
ld bc,256*8
call LDIRVM
ld hl,PTTRN1
ld de,CHRTBL+0x1000
ld bc,256*8
call LDIRVM
ld hl,PTTRN1+0x0800
ld de,CLRTBL+0x1000
ld bc,256*8
call LDIRVM
;- CLS (with character 0x0E)
ld hl,NAMTBL
ld bc,768
ld a,0x0E
call FILVRM
;-----------------------------------------------
;- program start
;- LOCATE 4,2: PRINT "TextExample"
ld hl,C_PRINTAT_STRING01
ld de,NAMTBL+(32*4)+2
ld bc,C_PRINTAT_END01-C_PRINTAT_STRING01
call LDIRVM
jp C_PRINTAT_END01
C_PRINTAT_STRING01:
db "S_DEC01$=str$(DAC_02)"
C_PRINTAT_END01:
;- DAC_02=58213
ld hl,DAC_02
ld de,58213
ld[hl],d
inc hl
ld[hl],e
;- S_DEC01$=str$(DAC_02)
ld hl,DAC_02
ld b,[hl]
inc hl
ld c,[hl]
ld h,b
ld l,c
ld de,S_DEC01
call S_NUM2DEC_ST01
;- LOCATE 6,2: PRINT S_DEC01$
ld hl,S_DEC01
ld de,NAMTBL+(32*6)+2
ld bc,S_DEC01_E-S_DEC01
call LDIRVM
;- trying random
call 0x2BDF
call 0x2F8A
;- S_DEC01$=str$(DAC_02)
ld hl,DAC_02
ld b,[hl]
inc hl
ld c,[hl]
ld h,b
ld l,c
ld de,S_DEC01
call S_NUM2DEC_ST01
;- LOCATE 8,2: PRINT S_DEC01$
ld hl,S_DEC01
ld de,NAMTBL+(32*8)+2
ld bc,S_DEC01_E-S_DEC01
call LDIRVM
;- trying random
call 0x2BDF
call 0x2F8A
;- S_DEC01$=str$(DAC_02)
ld hl,DAC_02
ld b,[hl]
inc hl
ld c,[hl]
ld h,b
ld l,c
ld de,S_DEC01
call S_NUM2DEC_ST01
;- LOCATE 10,2: PRINT S_DEC01$
ld hl,S_DEC01
ld de,NAMTBL+(32*10)+2
ld bc,S_DEC01_E-S_DEC01
call LDIRVM
;- trying random
call 0x2BDF
call 0x2F8A
;- S_DEC01$=str$(DAC_02)
ld hl,DAC_02
ld b,[hl]
inc hl
ld c,[hl]
ld h,b
ld l,c
ld de,S_DEC01
call S_NUM2DEC_ST01
;- LOCATE 12,2: PRINT S_DEC01$
ld hl,S_DEC01
ld de,NAMTBL+(32*12)+2
ld bc,S_DEC01_E-S_DEC01
call LDIRVM
;- trying random
call 0x2BDF
call 0x2F8A
;- S_DEC01$=str$(DAC_02)
ld hl,DAC_02
ld b,[hl]
inc hl
ld c,[hl]
ld h,b
ld l,c
ld de,S_DEC01
call S_NUM2DEC_ST01
;- LOCATE 14,2: PRINT S_DEC01$
ld hl,S_DEC01
ld de,NAMTBL+(32*14)+2
ld bc,S_DEC01_E-S_DEC01
call LDIRVM
;- trying random
call 0x2BDF
call 0x2F8A
;- S_DEC01$=str$(DAC_02)
ld hl,DAC_02
ld b,[hl]
inc hl
ld c,[hl]
ld h,b
ld l,c
ld de,S_DEC01
call S_NUM2DEC_ST01
;- LOCATE 16,2: PRINT S_DEC01$
ld hl,S_DEC01
ld de,NAMTBL+(32*16)+2
ld bc,S_DEC01_E-S_DEC01
call LDIRVM
;- trying random
call 0x2BDF
call 0x2F8A
;- S_DEC01$=str$(DAC_02)
ld hl,DAC_02
ld b,[hl]
inc hl
ld c,[hl]
ld h,b
ld l,c
ld de,S_DEC01
call S_NUM2DEC_ST01
;- LOCATE 18,2: PRINT S_DEC01$
ld hl,S_DEC01
ld de,NAMTBL+(32*18)+2
ld bc,S_DEC01_E-S_DEC01
call LDIRVM
;- trying random
call 0x2BDF
call 0x2F8A
;- S_DEC01$=str$(DAC_02)
ld hl,DAC_02
ld b,[hl]
inc hl
ld c,[hl]
ld h,b
ld l,c
ld de,S_DEC01
call S_NUM2DEC_ST01
;- LOCATE 20,2: PRINT S_DEC01$
ld hl,S_DEC01
ld de,NAMTBL+(32*20)+2
ld bc,S_DEC01_E-S_DEC01
call LDIRVM
;- trying random
call 0x2BDF
call 0x2F8A
;- S_DEC01$=str$(DAC_02)
ld hl,DAC_02
ld b,[hl]
inc hl
ld c,[hl]
ld h,b
ld l,c
ld de,S_DEC01
call S_NUM2DEC_ST01
;- LOCATE 22,2: PRINT S_DEC01$
ld hl,S_DEC01
ld de,NAMTBL+(32*22)+2
ld bc,S_DEC01_E-S_DEC01
call LDIRVM
;- do
L_DL_DO01:
L_DL_LOOP01:
jp L_DL_DO01
;----------------------
;-- sub-routines
S_NUM2DEC_ST01:
ld bc,-10000
call S_NUM2DEC_NUM1
ld bc,-1000
call S_NUM2DEC_NUM1
ld bc,-100
call S_NUM2DEC_NUM1
ld c,-10
call S_NUM2DEC_NUM1
ld c,-1
S_NUM2DEC_NUM1:
ld a,-1
S_NUM2DEC_NUM2:
inc a
add hl,bc
jr c,S_NUM2DEC_NUM2
sbc hl,bc
or $30
ld [de],a
inc de
ret
;- do
L_DL_DO02:
L_DL_LOOP02:
jp L_DL_DO02
;-----------------------------------------------
;- binary data
.org 0x9000
;- whole 4kb pattern bank here
;(this forum is saying El mensaje excede la longitúd máxima permitida (20000 caracteres). )


	En línea

nitrofurano

Karoshi Maniac

Mensajes: 259

Re: using rnd from bios mathpack

« Respuesta #1 : 08 de Enero de 2006, 09:36:17 pm »

because the forum limit, i had to split the code (...?)
the second and last split is below:

Código:

PTTRN1:
;- bitmap table at 0x?000
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
.db $FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$CF,$87,$87,$CF,$CF,$FF,$CF,$FF
.db $93,$93,$93,$FF,$FF,$FF,$FF,$FF,$93,$93,$01,$93,$01,$93,$93,$FF
.db $CF,$83,$3F,$87,$F3,$07,$CF,$FF,$FF,$39,$33,$E7,$CF,$99,$39,$FF
.db $C7,$93,$C7,$89,$23,$33,$89,$FF,$9F,$9F,$3F,$FF,$FF,$FF,$FF,$FF
.db $E7,$CF,$9F,$9F,$9F,$CF,$E7,$FF,$9F,$CF,$E7,$E7,$E7,$CF,$9F,$FF
.db $FF,$99,$C3,$00,$C3,$99,$FF,$FF,$FF,$CF,$CF,$03,$CF,$CF,$FF,$FF
.db $FF,$FF,$FF,$FF,$FF,$8F,$CF,$9F,$FF,$FF,$FF,$03,$FF,$FF,$FF,$FF
.db $FF,$FF,$FF,$FF,$FF,$CF,$CF,$FF,$F9,$F3,$E7,$CF,$9F,$3F,$7F,$FF
.db $87,$33,$23,$03,$13,$33,$87,$FF,$CF,$0F,$CF,$CF,$CF,$CF,$03,$FF
.db $87,$33,$F3,$C7,$9F,$33,$03,$FF,$87,$33,$F3,$C7,$F3,$33,$87,$FF
.db $E3,$C3,$93,$33,$01,$F3,$F3,$FF,$03,$3F,$07,$F3,$F3,$33,$87,$FF
.db $C7,$9F,$3F,$07,$33,$33,$87,$FF,$03,$33,$F3,$E7,$CF,$9F,$9F,$FF
.db $87,$33,$33,$87,$33,$33,$87,$FF,$87,$33,$33,$83,$F3,$E7,$8F,$FF
.db $FF,$FF,$CF,$CF,$FF,$CF,$CF,$FF,$FF,$FF,$CF,$CF,$FF,$8F,$CF,$9F
.db $E7,$CF,$9F,$3F,$9F,$CF,$E7,$FF,$FF,$FF,$03,$FF,$03,$FF,$FF,$FF
.db $9F,$CF,$E7,$F3,$E7,$CF,$9F,$FF,$87,$33,$F3,$E7,$CF,$FF,$CF,$FF
.db $83,$39,$21,$21,$21,$3F,$87,$FF,$CF,$87,$33,$33,$03,$33,$33,$FF
.db $03,$99,$99,$83,$99,$99,$03,$FF,$C3,$99,$3F,$3F,$3F,$99,$C3,$FF
.db $03,$93,$99,$99,$99,$93,$03,$FF,$01,$9D,$97,$87,$97,$9D,$01,$FF
.db $01,$9D,$97,$87,$97,$9F,$0F,$FF,$C3,$99,$3F,$3F,$31,$99,$C1,$FF
.db $33,$33,$33,$03,$33,$33,$33,$FF,$87,$CF,$CF,$CF,$CF,$CF,$87,$FF
.db $E1,$F3,$F3,$F3,$33,$33,$87,$FF,$19,$99,$93,$87,$93,$99,$19,$FF
.db $0F,$9F,$9F,$9F,$9D,$99,$01,$FF,$39,$11,$01,$29,$39,$39,$39,$FF
.db $39,$19,$09,$21,$31,$39,$39,$FF,$C7,$93,$39,$39,$39,$93,$C7,$FF
.db $03,$99,$99,$83,$9F,$9F,$0F,$FF,$87,$33,$33,$33,$23,$87,$E3,$FF
.db $03,$99,$99,$83,$87,$93,$19,$FF,$87,$33,$1F,$C7,$E3,$33,$87,$FF
.db $03,$4B,$CF,$CF,$CF,$CF,$87,$FF,$33,$33,$33,$33,$33,$33,$03,$FF
.db $33,$33,$33,$33,$33,$87,$CF,$FF,$39,$39,$39,$29,$01,$11,$39,$FF
.db $39,$39,$93,$C7,$93,$39,$39,$FF,$33,$33,$33,$87,$CF,$CF,$87,$FF
.db $01,$33,$67,$CF,$9D,$39,$01,$FF,$87,$9F,$9F,$9F,$9F,$9F,$87,$FF
.db $3F,$9F,$CF,$E7,$F3,$F9,$FD,$FF,$87,$E7,$E7,$E7,$E7,$E7,$87,$FF
.db $EF,$C7,$93,$39,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$00
.db $CF,$CF,$E7,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$87,$F3,$83,$33,$89,$FF
.db $1F,$9F,$83,$99,$99,$99,$43,$FF,$FF,$FF,$87,$33,$3F,$33,$87,$FF
.db $E3,$F3,$F3,$83,$33,$33,$89,$FF,$FF,$FF,$87,$33,$03,$3F,$87,$FF
.db $C7,$93,$9F,$0F,$9F,$9F,$0F,$FF,$FF,$FF,$89,$33,$33,$83,$F3,$07
.db $1F,$9F,$93,$89,$99,$99,$19,$FF,$CF,$FF,$8F,$CF,$CF,$CF,$87,$FF
.db $E7,$FF,$87,$E7,$E7,$E7,$27,$8F,$1F,$9F,$99,$93,$87,$93,$19,$FF
.db $8F,$CF,$CF,$CF,$CF,$CF,$87,$FF,$FF,$FF,$13,$01,$29,$39,$39,$FF
.db $FF,$FF,$07,$33,$33,$33,$33,$FF,$FF,$FF,$87,$33,$33,$33,$87,$FF
.db $FF,$FF,$23,$99,$99,$83,$9F,$0F,$FF,$FF,$89,$33,$33,$83,$F3,$E1
.db $FF,$FF,$27,$93,$93,$9F,$0F,$FF,$FF,$FF,$83,$3F,$87,$F3,$07,$FF
.db $EF,$CF,$83,$CF,$CF,$CB,$E7,$FF,$FF,$FF,$33,$33,$33,$33,$89,$FF
.db $FF,$FF,$33,$33,$33,$87,$CF,$FF,$FF,$FF,$39,$39,$29,$01,$93,$FF
.db $FF,$FF,$39,$93,$C7,$93,$39,$FF,$FF,$FF,$33,$33,$33,$83,$F3,$07
.db $FF,$FF,$03,$67,$CF,$9B,$03,$FF,$E3,$CF,$CF,$1F,$CF,$CF,$E3,$FF
.db $E7,$E7,$E7,$FF,$E7,$E7,$E7,$FF,$1F,$CF,$CF,$E3,$CF,$CF,$1F,$FF
.db $89,$23,$FF,$FF,$FF,$FF,$FF,$FF,$EF,$C7,$93,$39,$39,$39,$01,$FF
.db $87,$33,$3F,$33,$87,$E7,$F3,$87,$FF,$33,$FF,$33,$33,$33,$81,$FF
.db $E3,$FF,$87,$33,$03,$3F,$87,$FF,$81,$3C,$C3,$F9,$C1,$99,$C0,$FF
.db $33,$FF,$87,$F3,$83,$33,$81,$FF,$1F,$FF,$87,$F3,$83,$33,$81,$FF
.db $CF,$CF,$87,$F3,$83,$33,$81,$FF,$FF,$FF,$83,$3F,$3F,$83,$F9,$C3
.db $81,$3C,$C3,$99,$81,$9F,$C3,$FF,$33,$FF,$87,$33,$03,$3F,$87,$FF
.db $1F,$FF,$87,$33,$03,$3F,$87,$FF,$33,$FF,$8F,$CF,$CF,$CF,$87,$FF
.db $83,$39,$C7,$E7,$E7,$E7,$C3,$FF,$1F,$FF,$8F,$CF,$CF,$CF,$87,$FF
.db $33,$CF,$87,$33,$33,$03,$33,$FF,$CF,$CF,$FF,$87,$33,$03,$33,$FF
.db $E3,$FF,$03,$9F,$87,$9F,$03,$FF,$FF,$FF,$80,$F3,$80,$33,$80,$FF
.db $C1,$93,$33,$01,$33,$33,$31,$FF,$87,$33,$FF,$87,$33,$33,$87,$FF
.db $FF,$33,$FF,$87,$33,$33,$87,$FF,$FF,$1F,$FF,$87,$33,$33,$87,$FF
.db $87,$33,$FF,$33,$33,$33,$81,$FF,$FF,$1F,$FF,$33,$33,$33,$81,$FF
.db $FF,$33,$FF,$33,$33,$03,$F3,$07,$39,$C7,$83,$39,$39,$83,$C7,$FF
.db $33,$FF,$33,$33,$33,$33,$87,$FF,$E7,$E7,$81,$3F,$3F,$81,$E7,$E7
.db $C7,$93,$9B,$0F,$9F,$19,$03,$FF,$33,$33,$87,$03,$CF,$03,$CF,$FF
.db $0F,$27,$27,$0B,$33,$21,$33,$F1,$F1,$E4,$E7,$81,$E7,$E7,$27,$8F
.db $E3,$FF,$87,$F3,$83,$33,$81,$FF,$C7,$FF,$8F,$CF,$CF,$CF,$87,$FF
.db $FF,$E3,$FF,$87,$33,$33,$87,$FF,$FF,$E3,$FF,$33,$33,$33,$81,$FF
.db $FF,$07,$FF,$07,$33,$33,$33,$FF,$03,$FF,$33,$13,$03,$23,$33,$FF
.db $C3,$93,$93,$C1,$FF,$81,$FF,$FF,$C3,$99,$99,$C3,$FF,$81,$FF,$FF
.db $CF,$FF,$CF,$9F,$3F,$33,$87,$FF,$FF,$FF,$FF,$03,$3F,$3F,$FF,$FF
.db $FF,$FF,$FF,$03,$F3,$F3,$FF,$FF,$39,$33,$27,$C1,$9C,$31,$67,$E0
.db $39,$33,$27,$0C,$98,$30,$60,$FC,$FF,$E7,$FF,$E7,$E7,$C3,$C3,$E7
.db $FF,$CC,$99,$33,$99,$CC,$FF,$FF,$FF,$33,$99,$CC,$99,$33,$FF,$FF
.db $DD,$77,$DD,$77,$DD,$77,$DD,$77,$AA,$55,$AA,$55,$AA,$55,$AA,$55
.db $22,$88,$22,$88,$22,$88,$22,$88,$E7,$E7,$E7,$E7,$E7,$E7,$E7,$E7
.db $E7,$E7,$E7,$E7,$07,$E7,$E7,$E7,$E7,$E7,$07,$E7,$07,$E7,$E7,$E7
.db $C9,$C9,$C9,$C9,$09,$C9,$C9,$C9,$FF,$FF,$FF,$FF,$01,$C9,$C9,$C9
.db $FF,$FF,$07,$E7,$07,$E7,$E7,$E7,$C9,$C9,$09,$F9,$09,$C9,$C9,$C9
.db $C9,$C9,$C9,$C9,$C9,$C9,$C9,$C9,$FF,$FF,$01,$F9,$09,$C9,$C9,$C9
.db $C9,$C9,$09,$F9,$01,$FF,$FF,$FF,$C9,$C9,$C9,$C9,$01,$FF,$FF,$FF
.db $E7,$E7,$07,$E7,$07,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$07,$E7,$E7,$E7
.db $E7,$E7,$E7,$E7,$E0,$FF,$FF,$FF,$E7,$E7,$E7,$E7,$00,$FF,$FF,$FF
.db $FF,$FF,$FF,$FF,$00,$E7,$E7,$E7,$E7,$E7,$E7,$E7,$E0,$E7,$E7,$E7
.db $FF,$FF,$FF,$FF,$00,$FF,$FF,$FF,$E7,$E7,$E7,$E7,$00,$E7,$E7,$E7
.db $E7,$E7,$E0,$E7,$E0,$E7,$E7,$E7,$C9,$C9,$C9,$C9,$C8,$C9,$C9,$C9
.db $C9,$C9,$C8,$CF,$C0,$FF,$FF,$FF,$FF,$FF,$C0,$CF,$C8,$C9,$C9,$C9
.db $C9,$C9,$08,$FF,$00,$FF,$FF,$FF,$FF,$FF,$00,$FF,$08,$C9,$C9,$C9
.db $C9,$C9,$C8,$CF,$C8,$C9,$C9,$C9,$FF,$FF,$00,$FF,$00,$FF,$FF,$FF
.db $C9,$C9,$08,$FF,$08,$C9,$C9,$C9,$E7,$E7,$00,$FF,$00,$FF,$FF,$FF
.db $C9,$C9,$C9,$C9,$00,$FF,$FF,$FF,$FF,$FF,$00,$FF,$00,$E7,$E7,$E7
.db $FF,$FF,$FF,$FF,$00,$C9,$C9,$C9,$C9,$C9,$C9,$C9,$C0,$FF,$FF,$FF
.db $E7,$E7,$E0,$E7,$E0,$FF,$FF,$FF,$FF,$FF,$E0,$E7,$E0,$E7,$E7,$E7
.db $FF,$FF,$FF,$FF,$C0,$C9,$C9,$C9,$C9,$C9,$C9,$C9,$08,$C9,$C9,$C9
.db $E7,$E7,$00,$FF,$00,$E7,$E7,$E7,$E7,$E7,$E7,$E7,$07,$FF,$FF,$FF
.db $FF,$FF,$FF,$FF,$E0,$E7,$E7,$E7,$00,$00,$00,$00,$00,$00,$00,$00
.db $FF,$FF,$FF,$FF,$00,$00,$00,$00,$0F,$0F,$0F,$0F,$0F,$0F,$0F,$0F
.db $F0,$F0,$F0,$F0,$F0,$F0,$F0,$F0,$00,$00,$00,$00,$FF,$FF,$FF,$FF
.db $FF,$FF,$89,$23,$37,$23,$89,$FF,$FF,$87,$33,$07,$33,$07,$3F,$3F
.db $FF,$01,$39,$3F,$3F,$3F,$3F,$FF,$FF,$01,$93,$93,$93,$93,$93,$FF
.db $01,$99,$CF,$E7,$CF,$99,$01,$FF,$FF,$FF,$81,$33,$33,$33,$87,$FF
.db $FF,$99,$99,$99,$99,$83,$9F,$3F,$FF,$89,$23,$E7,$E7,$E7,$E7,$FF
.db $03,$CF,$87,$33,$33,$87,$CF,$03,$C7,$93,$39,$01,$39,$93,$C7,$FF
.db $C7,$93,$39,$39,$93,$93,$11,$FF,$E3,$CF,$E7,$83,$33,$33,$87,$FF
.db $FF,$FF,$81,$24,$24,$81,$FF,$FF,$F9,$F3,$81,$24,$24,$81,$9F,$3F
.db $C3,$9F,$3F,$03,$3F,$9F,$C3,$FF,$87,$33,$33,$33,$33,$33,$33,$FF
.db $FF,$03,$FF,$03,$FF,$03,$FF,$FF,$CF,$CF,$03,$CF,$CF,$FF,$03,$FF
.db $9F,$CF,$E7,$CF,$9F,$FF,$03,$FF,$E7,$CF,$9F,$CF,$E7,$FF,$03,$FF
.db $F1,$E4,$E4,$E7,$E7,$E7,$E7,$E7,$E7,$E7,$E7,$E7,$E7,$27,$27,$8F
.db $CF,$CF,$FF,$03,$FF,$CF,$CF,$FF,$FF,$8D,$63,$FF,$8D,$63,$FF,$FF
.db $C7,$93,$93,$C7,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$E7,$E7,$FF,$FF,$FF
.db $FF,$FF,$FF,$FF,$E7,$FF,$FF,$FF,$F0,$F3,$F3,$F3,$13,$93,$C3,$E3
.db $87,$93,$93,$93,$93,$FF,$FF,$FF,$87,$F3,$C7,$9F,$83,$FF,$FF,$FF
.db $FF,$FF,$C3,$C3,$C3,$C3,$FF,$FF,$44,$FF,$44,$FF,$44,$FF,$44,$FF
;- colour table at 0x?400 (too much $F1)
.db $00,$00,$00,$00,$00,$00,$00,$00,$11,$11,$11,$11,$11,$11,$11,$11
.db $22,$22,$22,$22,$22,$22,$22,$22,$33,$33,$33,$33,$33,$33,$33,$33
.db $44,$44,$44,$44,$44,$44,$44,$44,$55,$55,$55,$55,$55,$55,$55,$55
.db $66,$66,$66,$66,$66,$66,$66,$66,$77,$77,$77,$77,$77,$77,$77,$77
.db $88,$88,$88,$88,$88,$88,$88,$88,$99,$99,$99,$99,$99,$99,$99,$99
.db $AA,$AA,$AA,$AA,$AA,$AA,$AA,$AA,$BB,$BB,$BB,$BB,$BB,$BB,$BB,$BB
.db $CC,$CC,$CC,$CC,$CC,$CC,$CC,$CC,$DD,$DD,$DD,$DD,$DD,$DD,$DD,$DD
.db $EE,$EE,$EE,$EE,$EE,$EE,$EE,$EE,$FF,$FF,$FF,$FF,$FF,$FF,$FF,$FF
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4
.db $F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4,$F1,$F4


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jltursan

Karoshi Forum's Guru

Mensajes: 1516

¿Que es lo que has aprendido hoy?

Re: using rnd from bios mathpack

« Respuesta #2 : 09 de Enero de 2006, 01:33:02 pm »

I can't remember the Robsy's solution; but you can find here some easy random number generator routines:

http://baze.au.com/misc/z80bits.html#3

..and about the use of a new character table. If you only need a quick & dirty hack to print some texts in graphic modes and don't want to waste such amount of memory, you can use the ROM provided char table. The table is usually located at $1BBF; but the right address is found doing :

Código:

print hex$(peek(4)+peek(5)*256)

So, if you change PTTRN1 by the address found above you'll save 4 Kb (of course the font will be a bit dull; but it's only to do some tests, isn't it?


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Karoshi Maniac

Mensajes: 259

Re: using rnd from bios mathpack

« Respuesta #3 : 11 de Enero de 2006, 10:39:22 pm »

the solution Robsy sent me didn't work (afaik - recall i still very newbie, and that time i were much more... )

on one hand, simple solutions are very interesting and useful, and on another hand, some snippets here exploring mathpack would be very interesting too (for math calculations seems to be much more complicated doing in 'pure' assember (afaik))


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jltursan

Karoshi Forum's Guru

Mensajes: 1516

¿Que es lo que has aprendido hoy?

Re: using rnd from bios mathpack

« Respuesta #4 : 11 de Enero de 2006, 11:19:14 pm »

Citar

exploring mathpack would be very interesting too

Right, if you need to do some calculations it's a good solution to use the BIOS calls; but remember that they are overpowered and returns (I can't remember the exact number) a lot of decimals; so they're terribly slow. You can't use them to realtime animate a game, maybe one like "scorched earth", no more

Citar

for math calculations seems to be much more complicated doing in 'pure' assember (afaik)

Not really. Usually you don't need a lot of precision, so have you think about the use of a 16 bit register to hold a number with an integer 8 bit half (high byte) and a decimal 8 bit half (low byte)...?. It's lightning fast... Wink


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Karoshi Maniac

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Re: using rnd from bios mathpack

« Respuesta #5 : 12 de Enero de 2006, 03:50:39 pm »

Citar

and returns (I can't remember the exact number) a lot of decimals

what i used on the rnd mathpack example:

Código:

call 0x2BDF
call 0x2F8A

what i think is, afaik, call 0x2BDF is the rnd function, using the 14 character mantissa (8 bytes, 7 for mantissa and 1 for signal and float point position), and... (the meaning point) call 0x2F8A converts this 8 byte numerical value into a 2 byte integer - of course there are lots of performance lost converting 2byte values to 8byte dac values and vice-versa :-( - not as fast as using 'pure' asm, but seems to be a bit better than interpreted msx-basic btw... (performance and coding laziness compromise...)

Citar

..and about the use of a new character table. If you only need a quick & dirty hack to print some texts in graphic modes and don't want to waste such amount of memory, you can use the ROM provided char table. The table is usually located at $1BBF; but the right address is found doing :
Código:
print hex$(peek(4)+peek(5)*256)
So, if you change PTTRN1 by the address found above you'll save 4 Kb (of course the font will be a bit dull; but it's only to do some tests, isn't it? Smiley).

the first point were i didn't knew about 20kb text code posting limit... (that's why i hurried to split the code to at least having all there instead of editing the code to fit just in time) - laziness and intuition mixed...

i knew about the rom char table - all asm code i have are patch over a template i use for all examples i coded, and the 4kb custom char table were on all there - i have to optimize all my code to use both ways without much brain effort needed... (my laziness is always annoying guyver800 too, ehehehehe ;-) ) - about char table, the idea from Konami using the characters 0x00 to 0x15 for empty char blocks with colours 0x00 to 0x15 i adopted as excellent (unless we really need all 256 characters)

otherwise, the zxspectrum char table is 768 bytes long (characters 0x20 to 0x7F), maybe no bad idea at all using it instead...


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pitpan

Karoshi Forum's Guru

Mensajes: 1812

Re: using rnd from bios mathpack

« Respuesta #6 : 13 de Enero de 2006, 07:07:02 pm »

Small -and less random- random routine

Código:

RANDOMIZE:
; Init R register - call ONLY ONCE
xor a
ld r,a
ret

RANDOM:
; Return a 8-bit random number in A
ld a,r
push hl
push bc
ld hl,RANDOM_TABLE
ld c,a
ld b,0
add hl,bc
ld a,[hl]
ret

RANDOM_TABLE:

rept 128
db random(256)
endr

You would need asMSX 0.12b or higher to assemble this code. It worked fine for MINESWEEPER, for example.


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jltursan

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¿Que es lo que has aprendido hoy?

Re: using rnd from bios mathpack

« Respuesta #7 : 13 de Enero de 2006, 07:12:04 pm »

Btw, clever use of the REPT and RANDOM pseudo commands!


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Re: using rnd from bios mathpack

« Respuesta #8 : 14 de Enero de 2006, 07:00:15 pm »

thanks Robsy!
(let me guess: you introduced rept into asMSX since version 0.12b?)


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