Quote:

do you mean out ($fd),a?

a yes, sorry
@artrag:
are you using page 0 as RAM in your coding?

Quote:

The diskdrive is accessed, and then the screenmode swithes (to screen 1???), and everything stops ....

As soon as I use the B(in)LOAD routine written by BIFI, the system jumps to screen 1......

Storing page 0 into page 1 works.
Setting page 0 to RAM works.
But then loading files dont work anymore.....

something is not right ....

RO !!!!

It worked,
RAM is set at page 0 and the game works !!!
The only thing I changed is this:

in stead of:
LD A,(&HF341)
LD H,$00
CALL $24

I use:

Ld a,%0000 11 00 ;primairy slot=3, secundairy slot=0
LD H,$00
CALL $24

there is something on my mind still ....
Why dont i have to switch ROM to RAM for page 1?
(what I do now is simply: ld a,5 out ($fd),a)

LD A,(&HFCC1)
LD H,&H00
CALL &H24

Hey I just read in the document AURORA gave me, that I should use this value for A !!!!!!!!!!
It works !!! (i tried it on msx2, 2+ and TR)

RO !!! THANX MAN !!!

Quote:

Quote: do you mean out ($fd),a? a yes, sorry @artrag: are you using page 0 as RAM in your coding?

I use msxdos, usually I swap page 1 & 2 and I (ab)use pagemapping, without caring of MSX
compatibility.

AAAAAAAAAAAAAH I doesnt work

When I try this:

org $c000

;page1 to mapper 5
ld a,5
out ($fd),a

;make a copy of page 0 (ROM) to page 1 (RAM)
ld hl,0 ;start
ld de,$4000 ;destiny
ld bc,$4000 ;lenght
ldir ;copy block

;page0 to mapper 6
ld a,6
ld ($fd),a

;set page 0 to RAM
ld a,(#FCC1) ; get RAM primslot for page 0
ld h,0 (indicates page 0 to be set)
di
call #24 ; change slot
ei

;restore the stored ROM info from page 1 (RAM) to page 0 (NOW ALSO RAM !!)
ld hl,$4000 ;start
ld de,0 ;destiny
ld bc,$4000 ;lenght
ldir ;copy block

;now test if page 0 is writable and executable:
ld hl,test ;copy from
ld de,$3FFF ;write to page 0
ld bc $1 ;length block
ldir

jp $3fff

Test:
ret


the computer hangs...................


ld a,(#FCC1) ; get RAM primslot for page 0
aha, this is wrong, $FCC1 is to switch ROM back...
anyway, back to the initial problem

Have you never thought about developing in JAVA?




In any case, if you do not want to use memman
think about passing to msxdos.

Page 0 is always RAM and ready for your programs.
Disk I/O routines are ready to use and you can swap page 1 & 2 using
memmap or whatelse you like.

Actually using msxdos 2 whould be better (for you) but
it reduces the number of potential customers.

Quote:

there is something on my mind still .... Why dont i have to switch ROM to RAM for page 1? (what I do now is simply: ld a,5 out ($fd),a)

b'coz Wbass2 sets it for ya, so you've gotta do this in your BOOTING routine, together with the page 0 RAM set

ld a, (slotinfo)
ld h,#40 ; page 1
call #24

yeah, well we've gotta slap BEEF for mixing up the #f341 and #f343 vars
no honest, FCC1 is for ROM dude. check below.

I found this (and indeed proves which sysvar to use). It's code from the boot program of the kernel we wrote: (init all slots)

INISLT:	LD	A,($FCC1)	; PAGE 0,0,0 (Set subslot of slot 0)
	LD	H,0
	CALL	$24
	LD	A,($FFFF)	; Init MAIN-RAM subslot on all pages
	CPL	
	AND	$F0
	LD	B,A
	RRCA	
	RRCA	
	RRCA	
	RRCA	
	OR	B
	LD	($FFFF),A
	LD	A,($F343)
	LD	H,$40
	JP	$24

First it sets page 0 ROM then it will correct Subslots on page 2&3
and last but not least it sets page 1 to RAM

here are some more things you need:

; Set MSX ROM BIOS
MSXROM:	PUSH	AF
	IN	A,($A8) ;get prim.slot status
	AND	$FC ;set page 0 bits  to slot 0
	OUT	($A8),A
	POP	AF
	RET	

; Set FK RAM BIOS
FK_RAM:	PUSH	AF
	LD	A,($F343) ;get RAM slot data
	AND	$03 ;keep page 0 info
	PUSH	BC
	LD	B,A
	DI	
	IN	A,($A8) ;get other pages info
	AND	$FC
	OR	B
	OUT	($A8),A
	POP	BC
	POP	AF
	RET	

Here's another cool one:

; Call to ROM-BIOS in:IY=BIOS address
CALROM:	EX	AF,AF
	DI	
	IN	A,($A8)	; Page 0 subslot MUST be 0 [Done during INIT]
	PUSH	AF
	AND	$FC
	OUT	($A8),A	; Page 0,0
	EX	AF,AF
	CALL	JBRM.1
	EX	AF,AF
	POP	AF
	OUT	($A8),A
	EX	AF,AF
	RET	
JBRM.1:	JP	(IY)

oh and don't forget: DISK BIOS is in page 1 so you can't directly load/save data in/out page 1
good luck man!

in the last routine you can see why it's important to set subslots correct (see inislt).
Many games fail to do that during booting. Hence the "magic" poke -1,x (to set correct subslots.. I keep on repeating this bcuz it's important!) use rip the INISLT and use it in your bootingprogram and you'll be safe.

Quote:

LD A,($F343)

BiFi
msx guru
Posts: 2739 Posted: September 26 2005, 18:25
F342 is the address where the RAMslot is found for page 1 (detected by the diskrom).

Quote:

good luck man!

Thanx Ro, I really apreciate it a lot !!!!

Quote:

LD A,($F343)

BiFi (@www.msx.org/forumtopic5006.html)
msx guru
Posts: 2739 Posted: September 26 2005, 18:25
F342 is the address where the RAMslot is found for page 1 (detected by the diskrom).

Quote:

good luck man!

Thanx Ro, I really apreciate it a lot !!!!

It worked, Im happy.
This is what I did:

org $c000

;page1 to mapper 6
ld a,6
out ($fd),a

;make a copy of page 0 (ROM) to page 1 (RAM)
ld hl,0 ;start
ld de,$4000 ;destiny
ld bc,$4000 ;lenght
ldir ;copy block

;page0 to mapper 6 NOW PAGE 0 contains the copied Bios which was in page 0 initially
ld a,6
ld ($fd),a

;set page 0 to RAM
ld a,(#F341) ; get RAM primslot for page 0
ld h,0 (indicates page 0 to be set)
call #24 ; change slot



It works, !!! Now in Wbass2 for my own use i type: page 0,3,0,6
and voila, I can start using page 0 !!!!!!!!!!!!!!!

Thanx again, I have so much extra programming space now !!!

Btw, I have pages 1 and 2 filled completely with routines and data.
(background scroll, sprite tables, movement patterns, collision routines, weapon routines,
etc etc etc....)

What do you think is better:

Use page 0 for additional routines (enbosses, extra in game events/features, extra weapons etc etc)

Or use page 0 for the intro screen, load/save game option, and the intro demo

???

aha,

instead of using mapper 6, I use mapper 3 (because the ROM page 0 was initially in mapper 3, so no extra map is used)

the only thing I didnt use is:

Quote:

INISLT: LD A,($FCC1) ; PAGE 0,0,0 (Set subslot of slot 0) LD H,0 CALL $24 LD A,($FFFF) ; Init MAIN-RAM subslot on all pages CPL AND $F0 LD B,A RRCA RRCA RRCA RRCA OR B LD ($FFFF),A

is it very important to use this piece of code?

Quote:

Have you never thought about developing in JAVA?

I have no clue what it is, could you tell me some more about it (not too detailed please, I'mignorant)

Quote:

Actually using msxdos 2 whould be better (for you) but it reduces the number of potential customers.

why is that?