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This commit is contained in:
Thomas Harte 2022-06-13 15:27:23 -04:00
parent e066546c13
commit 7fa715e37a
1 changed files with 17 additions and 1 deletions
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18
Processors/68000Mk2/Implementation/68000Mk2Implementation.hpp
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@ -63,16 +63,32 @@ enum ExecutionState: int {
// up on its feet and profiling becomes an option.
/// Perform the proper sequence to fetch a byte or word operand.
/// i.e.
///
/// Dn/An/Q - (An) nr
/// (An)+ nr -(An) n nr
/// (d16, An) np nr (d8, An, Xn) n np nr
/// (d16, PC) np nr (d8, PC, Xn) n np nr
/// (xxx).w np nr (xxx).l np np nr
/// # np
AddressingDispatch(FetchOperand_bw),
/// Perform the proper sequence to fetch a long-word operand.
/// i.e.
///
/// Dn/An/Q - (An) nR nr
/// (An)+ nR nr -(An) n nR nr
/// (d16, An) np nR nr (d8, An, Xn) n np nR nr
/// (d16, PC) np nR nr (d8, PC, Xn) n np nR nr
/// (xxx).w np nR nr (xxx).l np np nR nr
/// # np np
AddressingDispatch(FetchOperand_l),
/// Perform the sequence to calculate an effective address, but don't fetch from it.
/// There's a lack of uniformity in the bus programs used by the 68000 for relevant
/// instructions; this entry point uses:
///
/// Dn - An -
/// Dn/An - (An) -
/// (An)+ - -(An) -
/// (d16, An) np (d8, An, Xn) np n
/// (d16, PC) np (d8, PC, Xn) np n