-12V usage in Philips MSX?

By marcoexo

Expert (83)

marcoexo's picture

18-11-2017, 01:18

I was wondering if there's any use in the main board of the -12v supply voltage.

I know that +12v is used by Floppy disk and video stages, but I can't see any usage on -12v , except being routed to the slots.

Is it just provided for RS232/serial requirements on slot cartridge ?

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By Louthrax

Paragon (1840)

Louthrax's picture

18-11-2017, 01:37

At least FM-PAC will not work without -12V (tested here with many different FM-PAC devices, none of them worked without -12V).

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