From cbad8aabbc82efbe7a49572a2da74224ae9c9f85 Mon Sep 17 00:00:00 2001
From: mrb0nk500 <b0nk@b0nk.xyz>
Date: Sun, 1 Dec 2019 17:40:41 -0500
Subject: Added the ability to disable the prefix byte.

Any instructions that either have a register size of
8 bits, use implied addressing, or branch can save a
byte by disabling the prefix byte.

It does this by checking if the first three bits are
all set to 1.
If true, then it will treat it as a prefix
byte, otherwise, it will treat it as an opcode.
---
 test/test-no-prefix.s | 8 ++++++++
 test/test.s           | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)
 create mode 100644 test/test-no-prefix.s

(limited to 'test')

diff --git a/test/test-no-prefix.s b/test/test-no-prefix.s
new file mode 100644
index 0000000..3c9c6a9
--- /dev/null
+++ b/test/test-no-prefix.s
@@ -0,0 +1,8 @@
+cps
+lda #$10
+rol #$1
+jmp $3
+;viewmem
+;q
+done
+
diff --git a/test/test.s b/test/test.s
index 3e8a7f2..7c36579 100644
--- a/test/test.s
+++ b/test/test.s
@@ -5,7 +5,7 @@
 cps		; Clear the processor status register.
 lda.w #$1000	; Load 0x1000 into the accumulator.
 rol #$1		; Then rotate the accumulator left by 1 bit.
-jmp $8006	; And then loop.
+jmp $8005	; And then loop.
 
 .org $FFC0	; Reset vector.
 .qword $8000
-- 
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