Upgrade MSX2 to MSX2+ (Yamaha YIS-503III) КУВТ2 | MSX Resource Center (Página 4/4)

Champion (346)

22-02-2015, 15:34

The official MSX2+ uses a main rom, a sub rom and a option rom. The option rom only contains the title (startup) screen.
MSX2 does not have the option rom, only a main rom and a sub rom.

Option rom must be in the same slot as the sub rom, and uses addressspace 04000H-07FFFH
If you want the title screen, you need the option rom.
But as you do not have the F4 register, you can start without the titlescreen.

Please mail me (my mailadres is in the contact information) your e-mail adres and I will send you the rom files.

Por DJs3000

Expert (104)

22-02-2015, 18:28

For work titlescreen not need register F4. I have made necessary changes for install 27C512 and write option.rom up sub.rom

Por DJs3000

Expert (104)

22-02-2015, 18:29

I myself would add option.rom

Por DJs3000

Expert (104)

22-02-2015, 20:09

On 2 page mr. Jipe well described

Quote:

to MSX Assembly Page
MSX I/O ports overview
This register is basically a simple memory cell which is preserved after a reset. It is used on the MSX2+ to differentiate between a hard boot (power on) and a soft boot (reset button) by writing a value to it during the boot routine, and check for that value everytime the computer starts. On the turboR, it also indicates whether the Z80 or the R800 has to boot.
Port range Description
#F4 System flags, preserved after reset
bit 5: CPU boot mode (1=R800)
bit 7: Boot method (1=soft boot, doesn’t show start logo)

Por DJs3000

Expert (104)

25-02-2015, 09:40

zeilemaker54, thanks for the help bios yet finalized and now it works very well

Por zeilemaker54

Champion (346)

25-02-2015, 20:10

No problem. Glad I could help

Por DJs3000

Expert (104)

05-03-2015, 13:27

Hi all
I want replace the standard titlescreen "MSX" to "KUVT2+". I have prepared a file. How to change titlescreen in KANJI.ROM?

KANJI.ROM
TITLESCREEN.BMP

Por NYYRIKKI

Enlighted (6033)

05-03-2015, 13:43

I managed to squeeze logo in to MSX2+ SUB-ROM... kind of... Free space was so tight that proper animation and "M" & "S" needed to go... See here. At least I didn' t have to modify the system for extra KANJI-ROM... I also made an psychological trick, so you probably don't even notice that F4-port is actually missing. (See description of the video)