The file below puts some stars in screen.
I tried to put the data of the stars in page 2 in stead of page 0.
But how do I set the computer to start readout spritedata (attribute table, color table etc) from page 2???


ORG 0C200H

LD HL,0F3E9H ; Ini screen 8
XOR A
LD (HL),A
INC HL
LD (HL),A
INC HL
LD (HL),A
LD A,8
CALL 5FH
LD A,63 ; Page 1
OUT (99H),A ; (Sprite-tabellen staan wel op page 0)
LD A,2+128
OUT (99H),A

CALL AAN ; Ini sprites en zet hook

JOOP: LD A,(0FBEDH) ; Wacht op spatie
BIT 0,A
JR NZ,JOOP

CALL UIT
LD HL,0F3E9H
LD (HL),15
INC HL
LD (HL),4
INC HL
LD (HL),4
XOR A
CALL 5FH
RET

AAN: CALL 69H ; Initialisatie sterrenhemel
DI
LD A,(0F3E0H) ; Sprites 8*8, niet vergroot
AND 252
LD (0F3E0H),A
OUT (99H),A
LD A,129
OUT (99H),A


; Zet VRAM-adres &HFA00 (sprite-kleurtabel)
LD HL,0FA00H
LD B,0
CALL SETVDP
LD A,15 ; (Alleen kleur van bovenste lijn is nodig)
OUT (98H),A


LD HL,0F000H ; Vul patroon van spritenr. 0 (1 puntje)
LD B,0
CALL SETVDP ; (de volgende 9 bytes zijn al 0, call &H69)
LD A,128
OUT (98H),A
XOR A
LD B,15
LOOP2: OUT (98H),A
DJNZ LOOP2
LD HL,0F800H ; Vul kleurtabel
LD B,0
CALL SETVDP
LD C,32
LOOP0: LD A,15
OUT (98H),A
XOR A
LD B,15
LOOP1: OUT (98H),A
DJNZ LOOP1
DEC C
JR NZ,LOOP0

LD HL,0FD9FH
LD DE,OLDHOO
LD BC,5
LDIR
LD A,0C3H
LD (0FD9FH),A
LD HL,STARS
LD (0FDA0H),HL
EI
RET

UIT: DI ; Reset hook
LD HL,OLDHOO
LD DE,0FD9FH
LD BC,5
LDIR
EI
RET


STARS: DI ; Zet sprites neer
LD B,32
LD HL,DATSP2
LOOP!!: PUSH BC
INC HL ; Tel X-waarde op
LD A,(HL)
INC HL
INC HL
ADD A,(HL)
DEC HL
DEC HL
LD (HL),A
DEC HL
LD D,(HL) ; Bereken VRAM-adres waar sprite komt
INC D ; ( (Y+1)*256+X )
LD E,A

EX DE,HL ; Kijk of er plaatje staat
LD B,65
CALL SETVDP
IN A,(98H)

PUSH AF
EX DE,HL
LD DE,0FA00H-DATSP2
ADD HL,DE ; Zet VRAM-adres van attribuut-tabel
LD B,0
CALL SETVDP
POP AF
OR A
JR Z,PUTSTR

SBC HL,DE
LD A,220 ; Plaatje op voorgrond: zet sprite weg.
OUT (98H),A
LD DE,4
ADD HL,DE
JR VERDER

PUTSTR: SBC HL,DE ; Geen plaatje: zet sprite neer.
LD BC,0498H
OTIR
VERDER: POP BC
DJNZ LOOP!!

EI
OLDHOO: DEFB 0,0,0,0,0

; Sprite-info-tabel: Y-coord / X-coord / spritenummer / X-snelheid
; (4e byte was kleurnr op MSX1, maar wordt toch niet gebruikt)
DATSP2: DEFB 15,230,0,5,20,237,0,5,25,136,0,6,30,46,0,4
DEFB 35,66,0,5,40,216,0,6,45,206,0,3,50,1,0,4
DEFB 55,154,0,2,60,61,0,5,65,41,0,6,70,212,0,4
DEFB 75,10,0,3,80,229,0,4,85,124,0,6,90,128,0,3
DEFB 95,184,0,4,100,152,0,7,105,167,0,2,110,50,0,2
DEFB 115,118,0,2,120,234,0,6,125,68,0,7,120,169,0,3
DEFB 135,80,0,4,140,111,0,5,145,24,0,7,150,152,0,7
DEFB 155,147,0,6,160,44,0,6,165,235,0,3,170,10,0,5

; Naam : SETVDP
; Funktie : Zet de VDP op schrijven of lezen
; Invoer : HL = VRAM-adres, B = >bit 0 pagina >bit 6 schrijven(0) of lezen(1)
; Uitvoer : C = datalees of dataschrijfpoort
; Verandert: AF,BC
SETVDP: LD C,99H
LD A,H
AND 0C0H
PUSH BC
RES 6,B
OR B
RLCA
RLCA
OUT (C),A
LD A,14 OR 128
OUT (C),A
LD A,H
OUT (C),L
POP BC
RES 0,B
AND 3FH
OR B
XOR 64
OUT (C),A
DEC C
RET


RES 0,B
AND

How about setting the right read out adress?

it is a 17 bit adress, devided over 14 bit and 3 bit.

how do I find out what the original value is??
(the original value, which is in page 0, more at less starting at y=212 will be about HL=$7000)

so if I know the original value and want to move it 2 pages then the new value will be:
AHL=$17000

right??

(if the standard value=$7000)

and which registers do I fill to change this??

try this:

SCREEN5:SETPAGE,2:A=VDP(5):B=VDP(12)

then R#5=A and R#11=B

try to get yourself a (hard)copy of the V9938 application manual... all the info you need is in there... for additional info on the V9958 you'll need to get a (hard)copy of that application manual too...

thanx

so what I said before
just make the A from AHL a 1 is like adding 2 pages, is it?

yep, though you need to change the sprite attribute registers as well... and the sprite pattern register(s) if you want to move the patterns in page 2 as well

I hereby invite you to join #msxdev on the Rizon IRC network. I'm there most of the time and it's a much quicker method to exchange info like this.

thank you !
Ill do some experimenting 2morrow,
and if it doesnt work out Ill meet you there 2morrow-> or soon !!

Quote:

try to get yourself a (hard)copy of the V9938 application manual... all the info you need is in there... for additional info on the V9958 you'll need to get a (hard)copy of that application manual too...

And all those goodies are right here

Remember: Funet is your friend! (You may quote me on that )

that V9938 one is quite big and has no table of contents... the one that comes with Chaos Assembler 3 is smaller and does have one, which is very useful.

the one that comes with Chaos Assembler 3
Bifi: where can I find this one?

I don't know where d-fader got it from back then, but I the CD-ROM with CA3 (and that version of the manual). It's a bit hard to send it to you though, as I don't have any info on that... but you can join #msxdev on Rizon of course and I can DCC it to you... and there are many coders in there being able to help you out where necessary.

unable to connect: null

thats what it says when I try to connect on Rizon IRC Network

irc.rizon.net
irc.rizon.org

I'm on irc.corezx.com:6669 now... that should work...

irc.eu.rizon.net works for me most of the time.