MSX2 rom flash to start with 60Hz | MSX Resource Center (Page 5/7)

Paladin (669)

30-11-2004, 14:23

And is there any possibility that more people can obtain this modified rom??? uche uche like me uche uche....

I posted it here before that I also like to play my original roms from Konami instead of cracked version but the 50hz mode is stopping me from doing it...

Par jpgrobler

Master (154)

30-11-2004, 15:54

Mail me.

If you want it on a eprom it is about 8 euro, postage included to The Netherlands. ONLY IF YOU OWN A MSX

j p g r o b l e r @ h o t m a i l < d o t > c o m

Par Gradius2

Hero (657)

13-08-2012, 00:41

MSX begin japanese, hence 60Hz, always was meant as NTSC (60Hz) only.

Par evulopah

Paladin (669)

13-08-2012, 08:47

Well, that's an old post!!

But still enjoying my modified ROM

Par SkalTura

Champion (404)

15-08-2012, 20:02

Jpgrobler: I know it's a very old post, but do you still have the ROM file for the 60Hz boot NMS8250 ??
I would love to have the file. I can write it to a chip myself... (is your email still the same ?)

Thank you in advance.

Par meits

Scribe (6571)

15-08-2012, 22:55

His last post is about a year ago now... Check Repair Bas... He made my MSX boot in 60Hz as well...

Par NYYRIKKI

Enlighted (6091)

16-08-2012, 00:06

This patch should not be hard to add even with very limited knowledge. All numbers are HEX and addresses are offset from ROM start.

NYYRIKKI wrote:

Needed modifications to NMS8250 SUB-ROM:

#0422: 8C,3E
#3E8C: CD, 3C, 06, DB, AA, E6, F0, F6, 03, D3, AA, DB, A9, E6, 20, C8, AF, 32, E8, FF, C9

Functionality:
While boot logo is displayed, push "H"-key down untill beep to start in 50Hz mode, otherways 60Hz mode will be selected.

If you want to change also boot logo to 60Hz, put 0 to #2B56

Par NYYRIKKI

Enlighted (6091)

16-08-2012, 01:00

SkalTura wrote:

do you still have the ROM file for the 60Hz boot NMS8250 ??
I would love to have the file. I can write it to a chip myself...

Step by step instructions:

- Download: http://www.msx.org/news/software/en/super-x-122-added-downloads
- Put it to disk and boot up your NMS8250
- Put the disk in and type:

BLOAD"SUPER-X.LDR",R{RET}_@{RET}
BT0#3-0,3FFF,0#4{RET}D422#4{RET}
8C3E{LEFT}{LEFT}{LEFT}{LEFT}{LEFT}{RET}{DOWN}{RIGHT}{RET}
{RET}{UP}CD3C06DBAAE6F0F603D3AADBA9E620C8AF32E8FFC9{ESC}
S#8250SUB.ROM,0#4,3FFF{RET}

- BURN IT!

Par SkalTura

Champion (404)

16-08-2012, 09:06

Got the ROM files in my mailbox.... Thank you !!

Par jpgrobler

Master (154)

06-05-2015, 04:54

The 8250 and 8280 subroms seem identical
So this patch should work on 8280 as well?