Request a wiki

Page 14/14
7 | 8 | 9 | 10 | 11 | 12 | 13 |

By thegeps

Champion (356)

thegeps's picture

09-01-2020, 18:40

Poltergeist wrote:
mars2000you wrote:
Manuel wrote:
Manuel wrote:

The WIki says that the VG 8230 was the 2nd MSX2 by Philips and the NMS 8220 the first. I think it's wrong, the 8230 was the first, the 8235 second. Not sure about the rest of the order though, but it's pretty clear when looking at the review in magazines.

Or did I miss something and is there some proof that the wiki is correct?

I just found a Philips newsletter and it says the 8230 is available from 1-1-1986 as the first MSX2 machine.

Interesting ... There's still a question: is the good order

1 - VG-8230 / NMS 8220 / VG-8235
2 - VG-8230 / VG-8235 / NMS 8220 ?

Easy: NMS abbreviation was introduced after the release of the VG-8235, so the NMS-8220 is newer. Also, the first MSX2 machines philips released had a diskdrive, while the NMS8220 was released as a "cheap" alternative.

So, VG-8230/VG-8235/NMS-8220 is the correct order

Are you sure about what you said of NMS introduction? My VG8020/40 is NMS marked too...

By hamlet

Scribe (2881)

hamlet's picture

09-01-2020, 21:45

As far as I know, there was no 8020 sold in Germany, only the 8235 and later the 8280, so we didn't wonder.
Of course the 8020 and 8235 also had that cool NMS brand. Beyond Philips' MSX engagement it was poorly part of the Videowriter VW x50 series but silently died afterwards. Also I got 1510 Cassetteplayer with and without the NMS brand.

By gdx

Prophet (3226)

gdx's picture

10-01-2020, 01:55

sd_snatcher wrote:

ENIG is just not suitable for connectors, and because it's too soft it will suffer from wear just like tinned contacts.

Tinned contacts are more problematic than simple wear. This can damage the contacts of the MSX connector (pins can sink in and catch on), and can create short circuits over time because the tin becomes frayed when it ages.

By Grauw

Ascended (8694)

Grauw's picture

10-01-2020, 12:14

There is also a difference between wear and corrosion… For a game cartridge wear seems to be less of an issue to me than it would be for extensions like a CF/SD interface or sound cartridge which are plugged in many times over a long period of time. Whereas corrosion is a problem for longevity no matter what.

By sd_snatcher

Prophet (3186)

sd_snatcher's picture

10-01-2020, 22:16

@gdx and @Grauw,

Ok, I see your point, but there are some more things to consider. My point is only that if the finish is ENIG, it shouldn't be advertised as "gold contacts" just because it's of golden color. It should be honestly advertised as just ENIG, then it's up to the buyer to decide if he likes it or not.

There's another important difference that ENIG lacks: when the real "gold fingers" process is used, the border of the PCB is finished to have a 45 degree angle, in order to not force the slot connector contacts, allowing them to last longer. Consequently the insertion also requires less force, and will put less pressure on the motherboard. This is specially important right-angle slots, like the rear slot of many MSX computers.

The term "Gold contacts" (or the more technically correct "Gold fingers") should only be used for hard-gold contacts with a 45 degree PCB border.

Note: The two things are not mutually exclusive. The PCB can have "gold fingers" on the EDGE connector, and ENIG finish on the rest of the PCB. OTOH, HASL (tin) finish is mutually exclusive with the "gold fingers" EDGE finish.

Page 14/14
7 | 8 | 9 | 10 | 11 | 12 | 13 |