Changes
CRTC
,/* DISPTMG (aka Display Enable) */
In this situation, all CRTCs activate VBORDER. On CRTC 1, even IBORDER is activated. But on CRTCs 0/2, the first raster line shows an alternation of bytes of VBORDER and displayable characters.
==== Byte precision ====
This behaviour exhibited by the CRTCs 0/2 demonstrates that, despite their 1MHz clock speed, they can change state at a rate equivalent to 2MHz chips. This is due to their ability to respond to both the rising and falling edges of each clock cycle.
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