Frank Shearar uploaded a new version of ST80 to project The Trunk:
http://source.squeak.org/trunk/ST80-fbs.164.mcz

==================== Summary ====================

Name: ST80-fbs.164
Author: fbs
Time: 31 October 2013, 10:20:44.812 pm
UUID: fc042d8e-f1d5-8a4e-b76d-0b9b448c8566
Ancestors: ST80-nice.163

Step 1 of moving control over display depth to the UIManagers.

=============== Diff against ST80-nice.163 ===============

Item was added:
+ ----- Method: MVCUIManager>>newDisplayDepthNoRestore: (in category 'display') -----
+ newDisplayDepthNoRestore: pixelSize
+ 	"Change depths.  Check if there is enough space!!  , di"
+ 	| area need |
+ 	pixelSize = Display depth ifTrue: [^ self  "no change"].
+ 	pixelSize abs < Display depth ifFalse:
+ 		["Make sure there is enough space"
+ 		area := Display boundingBox area. "pixels"
+ 		ScheduledControllers scheduledWindowControllers do:
+ 			[:aController | "This should be refined..."
+ 			aController view cacheBitsAsTwoTone ifFalse:
+ 				[area := area + aController view windowBox area]].
+ 		need := (area * (pixelSize abs - Display depth) // 8)  "new bytes needed"
+ 				+ Smalltalk lowSpaceThreshold.
+ 		(Smalltalk garbageCollectMost <= need
+ 			and: [Smalltalk garbageCollect <= need])
+ 			ifTrue: [self error: 'Insufficient free space']].
+ 	Display setExtent: Display extent depth: pixelSize.
+ 	ScheduledControllers updateGray.
+ 	DisplayScreen startUp!

Item was added:
+ ----- Method: MVCUIManager>>restoreDisplay (in category 'display') -----
+ restoreDisplay
+ 	"Restore the bits on Display"
+ 	Project current ifNotNil:[:p| p invalidate; restore].!

Item was added:
+ ----- Method: MVCUIManager>>restoreDisplayAfter: (in category 'display') -----
+ restoreDisplayAfter: aBlock
+ 	"Evaluate the block, wait for a mouse click, and then restore the screen."
+ 
+ 	aBlock value.
+ 	Sensor waitButton.
+ 	self restore.!