83Plus:OS:Ram Pages - Revision history

Fghsgh: grammatical incoherence fix and spelling

2020-03-04T19:44:02Z

grammatical incoherence fix and spelling

Fghsgh: update for MathPrint

2020-03-04T19:07:42Z

update for MathPrint

Thepenguin77 at 19:25, 7 October 2012

2012-10-07T19:25:09Z

KermMartian at 07:46, 10 March 2011

2011-03-10T07:46:05Z

FloppusMaximus: usb!

2006-05-26T00:45:19Z

usb!

Taricorp at 22:56, 22 May 2006

2006-05-22T22:56:02Z

Jim e: Add virtual calc and restore mem

2006-03-25T08:46:44Z

Add virtual calc and restore mem

Dan Englender: speeeling

2006-03-25T05:54:21Z

speeeling

Jim e: I created this page for ram page claiming.

2006-03-25T04:10:49Z

I created this page for ram page claiming.

New page

[[Category:83Plus:OS_Information|Ram Pages]]

This is to mark what ram pages may be used for short term or long term use.

'''80'''
* Defualt for TIOS at C000h
* Execution protected

'''81'''
* Defualt for TIOS at 8000h

'''82'''
* Not used by TIOS under typical execution
* Execution protected

'''83'''
* 84+(se) overwrites data at 4008h through 4069h with bytes 08-69 atleast prior to app execution.

'''84'''
* Not used by TIOS under typical execution
* Execution protected

'''85'''
* Not used by TIOS under typical execution

'''86'''
* Not used by TIOS under typical execution
* Execution protected

'''87'''
* Not used by TIOS under typical execution

@@ Line 22: / Line 22: @@
 * OS 2.x uses at least some of the range 4000h through 4080h to store app base pages prior to app execution. This is always regenerated and the OS doesn't seem to have any issue when you modify it.
 * 4100h through 433Ah is used for various buffers during USB communication.
-* On OSes with MathPrint, 577Eh through 5A7Dh is used to store the previous entries (command history). When this is modified, the calculator will crash if you scroll up on the homescreen past the program that modified it. Write 00 to 8E29 (numLastEntries) to prevent the user from scrolling up and avoiding the crash. This does not cause a memory leak and has no effect on older OSes (except with the OmniCalc entries menu). Zeroing this out doesn't seem to be neccesary. Beware that on 48 KiB models, any page in the 82-87 range maps to this page.
+* On OSes with MathPrint, 577Eh through 5A7Dh is used to store the previous entries (command history). When this is modified, the calculator will crash if you scroll up on the homescreen past the program that modified it. Write 00 to 8E29 (numLastEntries) to prevent the user from scrolling up and to avoid the crash. This does not cause a memory leak and has no effect on older OSes (except with the OmniCalc entries menu). Zeroing this out doesn't seem to be necessary. Beware that on 48 KiB models, any page in the 82-87 range maps to this page.
 * On OSes with MathPrint, 5A7Eh through 5D7Dh is the homescreen graph buffer. Modifying this has caused flickering for some. You'll probably want to zero this if you use it.
 * 3rd Party Uses

@@ Line 20: / Line 20: @@
 '''83'''
-* OS 2.x uses at least some of the range 4000h through 4080h to store app base pages prior to app execution.
+* OS 2.x uses at least some of the range 4000h through 4080h to store app base pages prior to app execution. This is always regenerated and the OS doesn't seem to have any issue when you modify it.
-* 4100 through 433A is used for various buffers during USB communication.
+* 4100h through 433Ah is used for various buffers during USB communication.
 * 3rd Party Uses
 ** Temporary swap for Virtual Calc by Michael Vincent

← Older revision		Revision as of 19:25, 7 October 2012
Line 2:		Line 2:

	This is to mark what ram pages may be used for short term or long term use.		This is to mark what ram pages may be used for short term or long term use.
		+
		+	'''It should be noted that on the newer calculator models ([[83Plus:Ports:15\|port 15]] >= 55h) pages 82-87 refer to the same physical memory'''

	'''80'''		'''80'''

← Older revision		Revision as of 07:46, 10 March 2011
Line 23:		Line 23:
	** Temporary swap for Virtual Calc by Michael Vincent		** Temporary swap for Virtual Calc by Michael Vincent
	** Temporary code execution for Real Sound by James Montelongo		** Temporary code execution for Real Sound by James Montelongo
		+	** Temporary CALCnet buffers for direct USB for Doors CS 7.2 and higher by Christopher "Kerm Martian" Mitchell

@@ Line 18: / Line 18: @@
 '''83'''
-* 84+(se) overwrites data at 4000h through 4080h with bytes 08-69 at least prior to app execution. (Used for storing the base pages of apps)
+* OS 2.x uses at least some of the range 4000h through 4080h to store app base pages prior to app execution.
 * 3rd Party Uses
 ** Temporary swap for Virtual Calc by Michael Vincent

@@ Line 18: / Line 18: @@
 '''83'''
-* 84+(se) overwrites data at 4008h through 4069h with bytes 08-69 atleast prior to app execution.
+* 84+(se) overwrites data at 4008h through 4069h with bytes 08-69 at least prior to app execution.
@@ Line 24: / Line 27: @@
 * Not used by TIOS under typical execution
 * Execution protected
 '''85'''
 * Not used by TIOS under typical execution
@@ Line 33: / Line 40: @@
 * Not used by TIOS under typical execution
 * Execution protected
+* 3rd Party Uses
 '''87'''
 * Not used by TIOS under typical execution

@@ Line 4: / Line 4: @@
 '''80'''
-* Defualt for TIOS at C000h
+* Default for TIOS at C000h
 * Execution protected
 '''81'''
-* Defualt for TIOS at 8000h
+* Default for TIOS at 8000h