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v620dasm.cpp: Add comment

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AJR 2022-05-06 20:50:47 -04:00
parent 61aacfef75
commit 5e81f34bf3
1 changed files with 2 additions and 0 deletions
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src/devices/cpu/v620/v620dasm.cpp
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@ -56,6 +56,8 @@ static const char *const s_index_tags[2] =
static const char *const s_reg_names[8] = static const char *const s_reg_names[8] =
{ {
"A", "B", "X", "R3", "R4", "R5", "R6", "R7" "A", "B", "X", "R3", "R4", "R5", "R6", "R7"
// A, B and X are legacy names for V75's R0, R1 and R2. These may also be written as plain
// numbers, though 1 = R2 and 2 = R1 to remain compatible with older indexing syntax.
}; };
static const char *const s_reg_mem_ops[4] = static const char *const s_reg_mem_ops[4] =