Wiki editing discussion

Ascended (17337)

17-01-2020, 23:17

Check out this German version of the PRN-C41, the PRN-C41D: https://www.marktplaats.nl/a/spelcomputers-en-games/spelcomp...

Por rderooy

Paladin (686)

18-01-2020, 00:15

Strange. Do you think they made a German version, just because of the DIN zero character? The manual seems to cover both the "regular" (presumably European) C41 and the D variation.

Por Manuel

Ascended (17337)

18-01-2020, 00:53

Yeah, I guess the thing has a ROM to know how to 'write' the MSX character set. And I think it may be adjusted for that character.

Also nice to see the manual has a section in Dutch

Por gdx

Prophet (3927)

18-01-2020, 09:11

Sd snatcher how did you calculate the power consumption?
http://www.msx.org/wiki/JoyMega

I think it is not useful to put an accurate value because it depends on the chip/transistor used. For example the chip below consumes 165mW. (Consumption is in watt not in ampere.)
http://www.ti.com/product/SN74LS04?DCM=yes&HQS=TI-null-null-...
Moreover, there is no JoyMega1 or 2, only one made with a chip or a transistor.

Por gdx

Prophet (3927)

18-01-2020, 12:22

For comparison the JoySNES microcontroller consumes 55mW.

Por Manuel

Ascended (17337)

18-01-2020, 15:38

rderooy: notice that just for (presumably) that single character, all packaging and labeling and everything is adjusted to add the D. Except the label on the top of the device.

Por sd_snatcher

Prophet (3401)

18-01-2020, 20:46

gdx wrote:

Sd snatcher how did you calculate the power consumption?
http://www.msx.org/wiki/JoyMega

The current consumption is shown in the datasheet of the chips, in (mili,micro)Amperes.

Quote:

I think it is not useful to put an accurate value because it depends on the chip/transistor used. For example the chip below consumes 165mW. (Consumption is in watt not in ampere.)

Yes, I know. But I'll quote here what's common sense on this topic:

"Power consumption measured in watt (usually in milliwatt, mW) is the correct term for low power applications but all too often the current consumption measured in ampere (usually milliamperes, mA) is used instead."

Since the MSX standard states a limit of 50mA/joystick port, it's more useful for a reader to show the current used by the devices than the power in mW. He then can easily calculate the percentage, or how much it will exceed the limit.

Using "low current consumption" on the article just sounds odd. So I sticked to the industry common sense.

Quote:

Moreover, there is no JoyMega1 or 2, only one made with a chip or a transistor.

Yes, there's the joyMega2, designed by Belavenuto and myself. It uses the NC7ST04 chip, that has a ridiculously low current consumption and allows for a very compact adapter. The compatibility with Megadrive controllers that have some 74HC* chips inside is also perfect now. The 74LS04 chip had issues with some few controllers.

I just had no time yet to update the English instructions to include the joyMega2.

Por sd_snatcher

Prophet (3401)

18-01-2020, 21:42

Quote:

For example the chip below consumes 165mW.

Yes, but that's the current consumption of the 74LS04, but under extreme conditions. At the typical 5V/25°C, it draws 18mA/90mW.

The 74HCT04 performs much better and also solves the issues with Megadrive controllers that have picky 74HC* chips inside. It draws only 20μA/0.1mW.

gdx wrote:

For comparison the JoySNES microcontroller consumes 55mW.

What's the chip used in JoySNES?

Por Manuel

Ascended (17337)

19-01-2020, 00:04

The box texts of the D-version: first German, than English. Of the European version: first English, then French Yeah, they went all the way there for a German version. Sony took the German market very seriously. I know MSX was really small in Germany, but I bet Sony was the biggest of all MSX vendors there. @hamlet - am I right?

Por gdx

Prophet (3927)

19-01-2020, 01:51

sd_snatcher wrote:

Quote:

For example the chip below consumes 165mW.

Yes, but that's the current consumption of the 74LS04, but under extreme conditions. At the typical 5V/25°C, it draws 18mA/90mW.

The 74HCT04 performs much better and also solves the issues with Megadrive controllers that have picky 74HC* chips inside. It draws only 20μA/0.1mW.

gdx wrote:

For comparison the JoySNES microcontroller consumes 55mW.

To calculate 165mW I do Vcc (5V) x Icc (3300μA) so 5 x 0.033 = 0.165. That is the maximum consumption. Where did you see "in under extreme conditions"?

sd_snatcher wrote:

What's the chip used in JoySNES?

16F630.

sd_snatcher wrote:

Yes, there's the joyMega2, designed by Belavenuto and myself. It uses the NC7ST04 chip, that has a ridiculously low current consumption and allows for a very compact adapter.

I see another JoyMega that use the same chip. This is also an inverter as 74HCT04 but with one gate only. It's ridiculous to call it a joyMega2. There is no fundamental difference. It looks like an unscrupulous car salesman.