Internal of several MSX Computers: Canon V-8, V-10, V-20 / Toshiba HX-33 / YASHICA YC-64 / PHILIPS VG-8020/19

Champion (357)

31-05-2015, 23:12

sd_snatcher wrote:

Casio fixed their PV-7 misdoings in the later MX-10, but only on the MX-101 they seem to have reached the same level as the PV-8 in clean design and cost effectiveness to produce.

PV-7 Is the first design, it has single-sided PCB, 8KB RAM, and DIN5 Cassete output, requires FA-32.

I think PV-16 Is the PV-7 redesign, it has double-sided PCB, 16KB RAM, and DIN8 MSX Standard cassete output.

I have MX-10 black and red in hands, and also MX-101. MX-10 red and black are the same inside.

Pictures of MX-10

I don't have an MX-15, but I think it is just the MX-10 modified for PAL video, as it seems to have been sold in Spain:

MX-15 picture

The MX-101 also has 16KB of RAM and DIN5 nonstandard cassete interface. Plus the RF transmitter.

By wernerkai

Champion (357)

01-06-2015, 00:08

Just found that HX-33 works with serial interface of HX-22...

Please see the last 3 pics:

By sd_snatcher

Prophet (3645)

01-06-2015, 01:40

Yes, your red MX-10 seems to have the same board I knew from this site:

But from the MSX Village pictures, the MX-101 seems to have a different board, more modern, single sided and probably with an S3527 MSX-Engine:

By sd_snatcher

Prophet (3645)

01-06-2015, 01:49

wernerkai wrote:

Just found that HX-33 works with serial interface of HX-22...

Please see the last 3 pics:

So the HX-33 has the RS-232 BIOS built-in by default without the UART hardware? What happens if you type _COMINI if:

1) There's no HX-22 RS-232 interface installed

2) There's an MSX standard RS-232 interface connected to the slot-1

Too sad the MSXMEM doesn't detect in which slot this RS-232 BIOS is installed.

By wernerkai

Champion (357)

01-06-2015, 02:13

sd_snatcher][quote=wernerkai wrote:

What happens if you type _COMINI if:

1) There's no HX-22 RS-232 interface installed

2) There's an MSX standard RS-232 interface connected to the slot-1

1) Syntax Error...

2) I can't test that by now. I would need a ROMless standard MSX RS-232. But he HX-22 and HX-33 know that the option board is installed because they check a bit controlled by CN1 ON/OFF in the option board. So without this bit... I guess the result would be also Syntax Error.

By wernerkai

Champion (357)

01-06-2015, 03:21

sd_snatcher wrote:

I like the Canon V-8 design a lot. Is it even smaller than the Casio PV-7 & MX-101?

It's for sure a low cost design, but a very clean and effective one in that category. The Casio PV-7 was certainly much more expensive & laborious to produce than the PV-8, and probably had the terrible keyboard to try to compensate for that. Is the keyboard of the PV-8 good?

Casio fixed their PV-7 misdoings in the later MX-10, but only on the MX-101 they seem to have reached the same level as the PV-8 in clean design and cost effectiveness to produce.

To the naked eye, Canon V-8 seems to be bigger due to its color. And indeed it is.

CASIO MX-10/MX101:
Width: 250mm
Depth: 200mm
Height: 45mm
Weight: 1000g

CASIO PV-7:
Width: 305mm
Depth: 210mm
Height: 47mm
Weight: 1525g

CASIO PV-16:
Width: 305mm
Depth: 210mm
Height: 47mm
Weight: 1555g

CANON V-8:
Width: 309mm
Depth: 214mm
Height: 43mm
Weight: 1440g

All have external DC Power Supplies, which can't provide +12/-12VDC.

The CASIO's have the Joypad, and are expandable through the docking stations KB-7 and KB-10. The Docking stations provide more two slots, +12/-12VDC and standard printer port. The SOUNDIN pins of the extra slots are connected to the mixer of the AUDIO output.

The SOUNDIN pin of slot 1 of model PV-7 is not connected, meaning you can't get SCC sound from this slot. I've made a hack to correct this adding a resistor to the PCB.

PV-7 and the MX models need the FA-32 adapter to use cassete recorder.

Also, I found that all PV-7 and PV-16 machines I took needed a keyboard membrane reactivation with graphite. This not happens with the MX, though.

The Keyboard of Canon V-8 is very good and works perfectly without keys failing or stucking. But it is totally parallell with the table, just like in modern notebooks.

Bonus for you all: Small MSX weight comparison.

LOL!

By wernerkai

Champion (357)

01-06-2015, 04:09

Regarding CASIO MX-101. Its' double-sided PCB.

That's why I buy every MSX computers I can

Because almost nobody opens them and takes good pictures !

Say hello to your new friend: HD62003

By wernerkai

Champion (357)

01-06-2015, 04:06

I forgot to mention I had this set of pictures of Toshiba HX-22 Japanese.

I made them long ago, but I forgot to upload.

Man, I am really very high on caffeine today oO

By Manuel

Ascended (19300)

01-06-2015, 14:29

I'd like to see a list of all these Toshiba TCX-xxxx chips with a description of what exactly they are doing...

By wernerkai

Champion (357)

01-06-2015, 18:08

Has anybody already tried to contact Toshiba support, to see if they can disclose the information about these chips, after 30 years ? Maybe Hitachi as well ?

Maybe some of you still work in the hardware industry and have some kind of contact ?