Clockchip in every MSX2 and up?

Hero (566)

03-02-2022, 13:49

I tried some searches, but are there MSX2 and higher computers made without a RP5C01 compatible clock chip on ports #B4-#B5?

By Grauw

Ascended (10768)

03-02-2022, 13:51

As far as I know the clock chip is a mandatory part of the MSX2 standard (and up), and in its absence the MSX2 BIOS won’t even boot up.

By Wlcracks

Hero (566)

03-02-2022, 13:58

wow thats fast thank you, thats good news...

By Grauw

Ascended (10768)

03-02-2022, 14:12

There are rare cases where people have upgraded their MSX1 to MSX2 without installing a clock chip, by using a modified BIOS with the clock chip initialisation code bypassed.

By Wlcracks

Hero (566)

03-02-2022, 14:14

Yes I am aware of that.

By aoineko

Paladin (1004)

03-02-2022, 21:45

Are we sure that there is no MSX2 and 2+ that have been released at the MSX time without the RTC?

By mars2000you

Enlighted (6487)

03-02-2022, 22:12

The RTC is fully part of the MSX2 standard, it is not even an option.

By foody

Champion (469)

03-02-2022, 22:42

What happens if the RTC fails in the MSX2?

By mars2000you

Enlighted (6487)

03-02-2022, 23:03

black screen, no booting

By msxholder

Champion (399)

03-02-2022, 23:04

Have a look at daewoo MSX 2 game consoles.

By foody

Champion (469)

04-02-2022, 04:20

is the rtc easily fixed if it failed?