84PCE:RAM:D01508 - Revision history

MateoConLechuga: Undo revision 11185 by MateoConLechuga (talk)

2016-05-26T15:30:10Z

Undo revision 11185 by MateoConLechuga (talk)

MateoConLechuga at 15:28, 26 May 2016

2016-05-26T15:28:14Z

MateoConLechuga at 20:26, 25 May 2016

2016-05-25T20:26:29Z

MateoConLechuga at 20:25, 25 May 2016

2016-05-25T20:25:28Z

MateoConLechuga at 20:25, 25 May 2016

2016-05-25T20:25:07Z

MateoConLechuga: Created page with "D01508 - lastEntryStkPtr lastEntryStkPtr == Synopsis == '''Unofficial Name:''' lastEntryStkPtr '''Memory Addr..."

2016-05-25T20:20:23Z

Created page with "D01508 - lastEntryStkPtr lastEntryStkPtr == Synopsis == '''Unofficial Name:''' lastEntryStkPtr '''Memory Addr..."

New page

[[Category:84PCE:RAM:By Address|D01508 - lastEntryStkPtr]] [[Category:84PCE:RAM:By Name|lastEntryStkPtr]]
== Synopsis ==
'''Unofficial Name:''' lastEntryStkPtr

'''Memory Address:''' D01508h

'''Length:''' 3 bytes

This is a pointer to the next available byte in the user entry stack.

@@ Line 1: / Line 1: @@
-[[Category:84PCE:RAM:By Address|D0053F - tempSP]] [[Category:84PCE:RAM:By Name|tempSP]]
+[[Category:84PCE:RAM:By Address|D01508 - lastEntryStkPtr]] [[Category:84PCE:RAM:By Name|lastEntryStkPtr]]
 == Synopsis ==
-'''Unofficial Name:''' tempSP
+'''Unofficial Name:''' lastEntryStkPtr
-'''Memory Address:''' D0053Fh
+'''Memory Address:''' D01508h
 '''Length:''' 3 bytes
-When the OS is checking the stack depth, it uses this region of memory to load hl with sp. For instance:
+This is a pointer to the next available byte in the user entry stack.
-−
- ld (tempSP),sp
- ld hl,(tempSP)
-−
-It can generally be used as a temporary data location, although it may be written to at some points.
-−
-==Why this is silly==
-−
-However, it is simply beyond me why they didn't simply do this, to save a ton of bytes and speed.
-−
- or a,a
- sbc hl,hl
- add hl,sp

@@ Line 1: / Line 1: @@
-[[Category:84PCE:RAM:By Address|D0150B - lastEntryStkPtr]] [[Category:84PCE:RAM:By Name|lastEntryStkPtr]]
+[[Category:84PCE:RAM:By Address|D01508 - lastEntryStkPtr]] [[Category:84PCE:RAM:By Name|lastEntryStkPtr]]
 == Synopsis ==
-'''Unofficial Name:''' lastEntryStk
+'''Unofficial Name:''' lastEntryStkPtr
-'''Memory Address:''' D0150Bh
+'''Memory Address:''' D01508h
-'''Length:''' 2048 bytes
+'''Length:''' 3 bytes
-This is the start of entry stack (note that the last entry is not in the stack, it is in the program '#')
+This is a pointer to the next available byte in the user entry stack.
-−
-The first 2 bytes are length of the entry, followed by input string.
-−
-nd from last entry is first in this stack.
-−
-−
-If you don't care about user friendliness, you can use this for your own RAM purposes. Just be sure to reset numLastEntries whenever you feel like it.

@@ Line 8: / Line 8: @@
 This is the start of entry stack (note that the last entry is not in the stack, it is in the program '#')
 The first 2 bytes are length of the entry, followed by input string.
 nd from last entry is first in this stack.
 If you don't care about user friendliness, you can use this for your own RAM purposes. Just be sure to reset numLastEntries whenever you feel like it.