Ydee, that's an odd link. Thanks for the reference though.
This seems more apropriate & direct. https://youtu.be/yXPpLLYMRqI?t=1229
edit : summarized video info
HM6311Q / MP 6311 (typical for google to not find that direct chip id in its search results. sigh)
this information wouldn't have been posted here without Ydee & Adrians digital basement info
Jumper Settings
JP10 ..... JP1
: : : : : : : : : :
JP1, JP2 Printer port selection
JP1 JP2 LPT selected
on on disable
off on LPT1 (0x3BC)
on off LPT2 (0x378)
off off LPT3 (0x278)
JP3 COLOR/MONO Selection
ON COLOR
OFF MONO
JP4 Auto Switching selection
ON Disable (manual)
OFF enable
JP5 Character ROM selection
ON internal
OFF external
JP6 Auto screen blanking selection
ON disable
OFF enable
JP7 Color emulation Selection
ON disable
OFF enable
JP8 reserved
JP9 Font select
ON 7x7 font
OFF 5x7 font
JP10 ?
CGA mode set JP3 JP4 JP5 JP6 JP7 jP8 ON
Mono mode (CGA emulation) set JP5 JP6 JP8 ON , JP3 JP4 JP7 JP9 OFF
Right to repair is fundamental. You own it, you're allowed to fix it.
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https://www.vogonswiki.com/index.php/Serial_port