84PCE:Ports:Control - Revision history

Commandblockguy: Fix OS Timer Control and CPU Speed Control being swapped

2021-04-24T07:44:02Z

Fix OS Timer Control and CPU Speed Control being swapped

2021-02-27T04:37:10Z

‎Port Address Space

2021-02-21T05:25:58Z

Updated port 000D

2017-08-06T11:37:33Z

2017-08-06T11:33:58Z

‎Port Address Space

2017-08-06T11:32:22Z

‎Port Address Space

2017-08-06T11:26:19Z

2017-08-06T11:25:58Z

2017-08-06T11:12:58Z

‎Synopsis

2017-08-06T11:12:48Z

‎Synopsis

@@ Line 18: / Line 18: @@
 |[[:84PCE:Ports:0000|0000]]
 |03
-|CPU Speed Control
+|OS Timer Control
 |-
 |[[:84PCE:Ports:0001|0001]]
 |03
-|OS Timer Control
+|CPU Speed Control
 |-
 |[[:84PCE:Ports:0002|0002]]

@@ Line 42: / Line 42: @@
 |[[:84PCE:Ports:0007|0007]]
 |B7
-|Latches values written
+|GPIO A DIR
 |-
 |[[:84PCE:Ports:0008|0008]]
 |7F
-|Cannot change value
+|GPIO A IN
 |-
 |[[:84PCE:Ports:0009|0009]]
 |37
-|Power control system
+|GPIO A OUT
 |-
 |[[:84PCE:Ports:000A|000A]]
 |FD
-|Latches value written
+|GPIO B DIR
 |-
 |[[:84PCE:Ports:000B|000B]]
 |F8
-|Charging Status
+|GPIO B IN
 |-
 |[[:84PCE:Ports:000C|000C]]
 |00
-|Latches value written
+|GPIO B OUT
 |-
 |[[:84PCE:Ports:000D|000D]]

@@ Line 66: / Line 66: @@
 |[[:84PCE:Ports:000D|000D]]
 |FF
-|Bit 0: Freeze if reset<br />Bit 1: Crash if reset<br />Bit 2: No apparent effect if reset<br />Bit 3: Reset to disable VRAM. Upon set, VRAM is garbage<br />Bits [7:4]Possibly last value written
+|Power control
 |-
 |[[:84PCE:Ports:000E|000E]]

@@ Line 5: / Line 5: @@
 '''Function:''' Master Control
-This port range is used to configure and control important things; possibly the reason why it does not have a memory-mapped address.
+This port range is used to configure and control important things; possibly the reason why it does not have a memory-mapped address. It is mirrored every 0x100 bytes.
 If a port is not listed; it indicates that writes have no effect and do not latch, and that reads are 0. Note that this may not be true one hundred percent.

@@ Line 66: / Line 66: @@
 |[[:84PCE:Ports:000D|000D]]
 |FF
-|Bit 0: Freeze if reset<br />Bit 1: Crash if reset<br />Bit 2: No apparent effect if reset<br />Bit 3: Reset to disable VRAM? Upon set, VRAM is garbage.<br />Bits [7:4]Possibly last value written
+|Bit 0: Freeze if reset<br />Bit 1: Crash if reset<br />Bit 2: No apparent effect if reset<br />Bit 3: Reset to disable VRAM. Upon set, VRAM is garbage<br />Bits [7:4]Possibly last value written
 |-
 |[[:84PCE:Ports:000E|000E]]

@@ Line 90: / Line 90: @@
 |[[:84PCE:Ports:0028|0028]]
+|
-|Bit 1 is always 0, other bits latch value written
+|Bit 1 is always 0
 |-
 |[[:84PCE:Ports:0029|0029]]

@@ Line 1: / Line 1: @@
 [[Category:84PCE:Ports:By_Address|Control]] [[Category:84PCE:Ports:By_Name|Control]]
 == Synopsis ==
 '''Port Number:''' 0000-0fff

@@ Line 28: / Line 28: @@
 |-
 |[[:84PCE:Ports:0003|0003]]
 |00
 |-
 |[[:84PCE:Ports:0005|0005]]

@@ Line 31: / Line 31: @@
 |Hardware ID
 |00
 |[[:84PCE:Ports:0005|0005]]
 |76