Define instructions' parameter format

1 files changed, 31 insertions, 0 deletions

diff --git a/cpu/instructions/parameter.txt b/cpu/instructions/parameter.txt
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+++ b/cpu/instructions/parameter.txt
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+n: min number of bits to be able to represent all types
+TODO: define x
+
+Binary format:
+	type[n], data[x]
+
+
+Types:
+	Short immediate reference:
+		Value is placed directly in the data section
+
+	Immediate reference:
+		y: min size required to represent each power of two value less than or equal to the current mode (in bytes, and greater than or equal to 1)
+		data[0 to x-y-1]:
+			size of immediate value
+
+		data[x-y to x-1]:
+			byte offset into the array of immediate values
+
+	Register:
+		data just to select which register
+
+	Memory at immediate reference:
+		Uses RAM pointed to by the value as obtained in `immediate reference` above
+
+	Memory at register:
+		Uses RAM pointed to by the value as obtained in `register` above
+
+	TODO: Will add more later
+
+All memory references go through any configured translation thereof, unless specified otherwise