MSX AX-330 with built-in Nintendo hardware ...!!

Page 3/7
1 | 2 | | 4 | 5 | 6 | 7

By hap

Paragon (2042)

hap's picture

12-10-2012, 15:32

The EPROMS are on the MSX-half. The Famiclone doesn't have any.
and no, I'm not going to make an emulator for it Tongue

By alhofan

Rookie (21)

alhofan's picture

12-10-2012, 15:48

I will try to dump it this week...

By mohai

Paladin (995)

mohai's picture

12-10-2012, 16:05

64 KB, that is what i meant Wink
oops !!

By RetroTechie

Paragon (1563)

RetroTechie's picture

12-10-2012, 17:00

Judging by # of pins, MSX engine could be regular S3527 or S1985 - if someone takes the time, should be possible to determine by checking pin connections. Developing an alternative engine IC would have been costly & probably offer little benefit if any.

Which makes me wonder why there's a discrete PSG in there (OY-2-8910AC Question Shocked! ). Mapper IC next to those 4 MBit EPROMs is the same I've seen in several MegaROM game cartridges. If it has 1 MByte to control, most likely 16KB blocks (LZ93A can do 8 KB blocks too, AFAIK). What for? I'd guess a JIS-like add-on for Arabic characters, probably other Arabic MSX owners will have a better idea about what's in there.

Basic 16KB VRAM + 64KB main RAM from the looks of it?

And twice the system ROM (64KB) that you need for an MSX1. Frankenstein machine indeed, but I don't think very interesting for emulation purposes. More a nice curiosity / collector's item. Cool

By PingPong

Prophet (4088)

PingPong's picture

12-10-2012, 21:57

where is the msx vdp?

By alhofan

Rookie (21)

alhofan's picture

15-11-2012, 06:04

Hi again...
I came with a big surprise Smile
I found another AX 330 ...and it's also Famiclone (Nintendo) built-in...Not MegaDrive...
This AX 330 little diffrent than the other one...I think it's newer cus of the electronic circuits design and the electronic parts...(see pix)
Now I'm 100% sure that the AX 330 is NES built-in .. not Megadrive... and all the other info regarding the MegaDrive built-in inaccurate and wrong....unless someone prove I'm wrong Smile

By alhofan

Rookie (21)

alhofan's picture

15-11-2012, 10:07

Now we can see the difference between AX-330 and AX-990

AX-330 got Nintendo ( Famiclone ) built-in + 29 programs. Smile
AX-660 and AX-990 got the Sega MegaDrive built-in + 50 programs. Wink

AX-660 board >>you can see the Mega Drive board

By Daemos

Paragon (2028)

Daemos's picture

15-11-2012, 09:51

Why did they sand the surface of the VDP? Was there a reason to do that back then?

By alhofan

Rookie (21)

alhofan's picture

15-11-2012, 09:57

Daemos wrote:

Why did they sand the surface of the VDP? Was there a reason to do that back then?

I don't know why ? It was Deliberately removed in both units...!!

By RetroTechie

Paragon (1563)

RetroTechie's picture

15-11-2012, 10:20

Dude, that's an MSX2 videochip in there... And with same model number as that MSX1 earlier in this topic? Question If that's not a case transplant, very weird. oO And to top it off, with a BASIC marked version 1.01 but (c) 1986.

64K VRAM + 64K main RAM. The chip marked "AT8001" will simply be a ROM, I think.
Don't have a clue what that KC89C72 chip is. I'd guess perhaps a PSG clone, but if so I don't understand why that would be there as a separate chip. The NEC chip in the middle will be some kind of MSX engine, but I never saw that particular type marking before. Wouldn't surprise me if it's a re-labeled S1985 though. The CXA1145 is just a PAL/NTSC video encoder - nothing special.

Page 3/7
1 | 2 | | 4 | 5 | 6 | 7