Difference between revisions of "84PCE:Ports:0006"
From WikiTI
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=== Bit [3] === | === Bit [3] === | ||
Writes do not latch; no apparent effect. | Writes do not latch; no apparent effect. | ||
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Used by OS on Python Edition. | Used by OS on Python Edition. | ||
Revision as of 20:46, 28 June 2019
Contents
Synopsis
Port Number: 0006
Function: Unknown
Details
This port seems to affect the display refresh.
Bit [0]
Latches value written, no apparent effect.
Bit [1]
Reset this bit to disable display upadates.
Bit [2]
Set this bit to enable display updates if bit 1 is ever reset. ???
This bit is known to unlock protected ports, such as SHA256, and enables the flash unlock sequence. It is cleared every time the boot code interrupt handler runs.
Bit [3]
Writes do not latch; no apparent effect.
Used by OS on Python Edition.
Bit [4]
Flash lock status.
Bits [7:3]
Writes do not latch; no apparent effect.
