I am wondering if any of these cartridges require +/-12V? Another simple thing to try is replacing the power supply, check if you have 5V/3A or so power supply around that you can use.

If someone knows in which area of ​​the BIOS the character map is located, I will try to make an msx2 + BIOS with PAL character map.

Sergey wrote on Mon, 16 March 2020 12:01

I am wondering if any of these cartridges require +/-12V? Another simple thing to try is replacing the power supply, check if you have 5V/3A or so power supply around that you can use.

Unfortunately I didn't notice an improvement using a 5V/3A power supply. I think the only cartridge I have which requires +/-12V is an ASCII MSX-Serial 232 which seems to be working perfectly.

jordi.solis wrote on Mon, 16 March 2020 15:36

If someone knows in which area of ​​the BIOS the character map is located, I will try to make an msx2 + BIOS with PAL character map.

I'd be very interested in this!

       KEYTYP  keyboard layout
               0 = Japanese 
               1 = International (QWERTY/other) 
               2 = French (AZERTY) 
               3 = English 
               4 = German (DIN)
               5 = USSR
               6 = Spanish
               7 = Swedish ??

If bit 0-3 on byte #002C sets the keyboard language... What does it do the JP2 jumper?

Hi,
With this link you should be able to find 'systemroms.zip' which holds the roms for a lot of MSX machines.
http://www.msxarchive.nl/pub/msx/emulator/openMSX/

Wrt slot order, I have found that the MSX(2/2+) BIOS is not that picky where it subroms are. It just looks from roms with start with 43h, 44h (normal program ROMs use 41/42h).
On my homemade MSX (Z8TY) I have expanded slot 0 and most ROMS live in a slot 0 subslot, works just fine.

I think the same goes for RAM, it should not matter in what slot the RAM lives (maybe RAM in slot 0 subslots would not work). (otherwise e.g. RAM cartridges would not work)

Hi all.
Otherwise I fount a little problem and I would like get help also on this.
All chars are now ok but the slashbar what is yen symbol.
I think is a bit different issue because when the system should print a \ it prints a Y (yen money symbol) on its place.
So... when the DOS begins shows anything like a:Y> and not like a:\>
and when you would like to go root directory you should type cd Y (you will write the yen simbol with the \ key)

Jordi Solis
MSXmakers!

That is the expected behavior since Petr only modifed the keyboard mapping code. The font in the BIOS is still a Japanese one. If you look at the MSX fonts here https://www.msx.org/wiki/MSX_font, character 0x5C in the international font is "\", while in Japanese font it is yen sign.
This can be fixed by modifying the font. I'll take a stab at that later.

Hummm
I wonder if their MSX DOS always looked like this...
A:Y>

Hello everyone, how do you think such a device will work with Omega?
https://www.msx.org/wiki/Carnivore2
https://github.com/RBSC/Carnivore2

https://www.msx.org/forum/msx-talk/hardware/1024kb-memory-up grade-yamaha-msx2-yis503?page=0

https://github.com/RBSC/F4-FMPAC

jordi.solis wrote on Wed, 08 April 2020 06:40

Quote:

https://github.com/RBSC/F4-FMPAC

This probably will work. Although it can be significantly simplified: Omega would not need a ROM for FMPAC, there's plenty of space in system flash ROM. F4 port - I am still confused as for why one would need it (maybe for Mega RAM loaders, so they can reset the system without erasing RAM content?!. But if needed all the port F4 decode logic can be made into an ATF16F8 SPLD. The same SPLD can be also used for YM2413, a.k.a. OPLL.
The sound output can be fed back to Omega, so that the analog / opamp part can be omitted as well. Unless you want stereo sound.

Let me know if you're interested in either one of the options. I can help with the design.

I really like the idea behind https://github.com/S0urceror/MSX-USB.
Similar to Rookiedrive, but open source.
You can even attach USB floppy drive if you want.
I haven't tried it yet, pcbs are still being made in China.

bo/

Working with S0urcerer to get my board going sw wise

AFAIK both the sunrise and the carnivore require a floppy drive to format the CF or SD cards you'd use and you'd need to install NEXTOR/MSX-DOS on them in order to do something with them. Then you'd have to load all of the software you wanted to use on the cards via your PC.

I took a look on your connector signals right know. I just thought you made this connector for previous maiden board and so I didn't imagine you implemented all the logic on the main board.

I think you mean a design like this.
Thank you to double check it. (I'm not so confident with my skills).

F4-FMPAC This probably will work.

Although it can be significantly simplified:
Omega would not need a ROM for FMPAC, there's plenty of space in system flash ROM.

F4 port - If needed all the port F4 decode logic can be made into an ATF16F8 SPLD.

The same SPLD can be also used for YM2413, a.k.a. OPLL.

The sound output can be fed back to Omega, so that the analog/opamp part can be omitted as well.

Unless you want stereo sound.

I can help with the design.

Add the F4 register required by Basic 3.0

I ordered few F4-FMPAC boards to be built, so I will be able to test at all if it's working or not.

Quote:

F4 port - If needed all the port F4 decode logic can be made into an ATF16F8 SPLD.

A hint to do it by myself would be good, It's easy to program a SPLD as replacement for a sequential logic (74LS74D)? Maybe I should consider the clock on the karnaugh's table?

Quote:

The same SPLD can be also used for YM2413, a.k.a. OPLL.

I will need to check it's datasheet, I wonder it was so simple.

The sound output can be fed back to Omega, so that the analog/opamp part can be omitted as well.

Quote:

Unless you want stereo sound.

I think it would be nice even some jumpers to select it. The worst thing is RGB connector has not spare pins for adding the stereo sound.

Quote:

I can help with the design.

I would be glad to get your help

As comented on the following web page:
https://hansotten.file-hunter.com/do-it-yourself/msx2-upgrad es/Quote:

Add the F4 register required by Basic 3.0

Maybe we fount the only use for this F4 register

Actually OPLL produce mono output... so this is not relevant

How about making a cartridge with F4 and FM-PAC, and perhaps a WD37C65 floppy controller?!

• omega_msx2_ntsc.bin - MSX2 ROM based on Sanyo PHC-23J, international keyboard, patched backslash; and US/NTSC MSX2 C-BIOS
  
• omega_msx2_pal.bin - MSX2 ROM based on Philips NMS 8250; and EU/PAL MSX2 C-BIOS
  
• omega_msx2+_ntsc.bin - MSX2+ ROM based on Sanyo PHC-35J, international keyboard, patched backslash; and US/NTSC MSX2+ C-BIOS
  
• omega_msx2_int_ntsc.bin - MSX2 ROM based on Sanyo PHC-23J, international keyboard, patched backslash; and the same BIOS with "international" flags set
  
• omega_msx2_msx2+_ntsc.bin - MSX2+ ROM based on Sanyo PHC-35J, international keyboard, patched backslash; and the same BIOS with "international" flags set
  
• omega_msx2+_int_ntsc.bin - MSX2 ROM based on Sanyo PHC-23J, international keyboard, patched backslash, with "international" flags set; and MSX2+ ROM based on Sanyo PHC-35J, international keyboard, patched backslash
  

bifo wrote on Thu, 09 April 2020 15:23

AFAIK both the sunrise and the carnivore require a floppy drive to format the CF or SD cards you'd use and you'd need to install NEXTOR/MSX-DOS on them in order to do something with them. Then you'd have to load all of the software you wanted to use on the cards via your PC.

Hi,
I have all the Carnivore components but it's still in my to do list.
I'm not sure about Carnivore but with the rookie drive was easier as formatting it with windows 7 and copy all the files.
Even the best way was start on BASIC with the cartridge ROM inside and "call fdisk".
I don't know if carnivore has similar functionality but it should.

I will let you know as far as I get it working.

MSXmakers