From 7fa715e37ad3c0ee8a525cfd0dbda7f6e376b324 Mon Sep 17 00:00:00 2001 From: Thomas Harte Date: Mon, 13 Jun 2022 15:27:23 -0400 Subject: [PATCH] Provide more thorough documentation. --- .../Implementation/68000Mk2Implementation.hpp | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/Processors/68000Mk2/Implementation/68000Mk2Implementation.hpp b/Processors/68000Mk2/Implementation/68000Mk2Implementation.hpp index 4b207b005..857d4f6e5 100644 --- a/Processors/68000Mk2/Implementation/68000Mk2Implementation.hpp +++ b/Processors/68000Mk2/Implementation/68000Mk2Implementation.hpp @@ -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