[draft] implemented rom switch by IO_CONTROL, debug print now a switch#6

mk2s wants to merge 3 commits intoFujiNetWIFI:feat/fujinetFujiNetWIFI/openMSX:feat/fujinetfrom

mk2s:implement-rom-switch-by-IO_CONTROLmk2s/openMSX:implement-rom-switch-by-IO_CONTROLCopy head branch name to clipboard