Differences

This shows you the differences between two versions of the page.

--- sd:sd-8516_extended_register_layout [2026/06/18 16:19] – appledog
+++ sd:sd-8516_extended_register_layout [2026/06/18 16:26] (current) – appledog
@@ Line 26: / Line 26: @@
 This removes the need to pair 16 bit registers in a way that clobbers them.
-| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
+    1    2    3    4    5    6    7
-| AL | AH |||||||
+    AL   AH
-| A || |||||
+    -- A --
+    ------- AX ------   ------ EA -------
+    --------------- EAX -----------------
+This allows E registers to be used as 32 bit pointers without using a code (AL/AH, A, or AX) register. It also means 64 bit registers are easier to use. Currently its ABCD or nothing, which gets a bit odd.
+I haven't implemented this, but I might. I mean, the current system works.. and, as they say, everything is a tradeoff.
+What happens to the 24 bit pointers? They get removed. Eventually. The fact is, this isn't real hardware. There's no reason to use a 24 bit pointer.