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r176132 Saturday 12th June, 2021 at 13:13:42 UTC by jaen.saul
HD61830: Fix character blink mode

When Cursor=Off and Blink=On, the controller is in "Character Blink"
mode, according to the data sheet.

This means that the character cell at the the position of the cursor is
turned fully ON at a 50% blink duty cycle. Verified on a device with a
real HD61830 (Atari Portfolio).
[/branches/pc98_state/hash]rx78_cart.xml super80_cass.xml
[/branches/pc98_state/src/devices/video]hd61830.cpp
[/branches/pc98_state/src/mame/drivers]meritum.cpp pofo.cpp rx78.cpp


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