13 Commits

Author	SHA1	Message	Date
David Banks	6ac7902449	Z80: tristate A and D when reset asserted ... Change-Id: Ieeb558b5df1a7b3705874468c98a0b72ebb2d505	2020-01-28 12:00:20 +00:00
David Banks	849300b51c	lx9_dave: Baud rate now 115200 ... Change-Id: I6d29b7ff143828ff78a21a717a3c638553505d81	2019-11-11 11:16:42 +00:00
David Banks	06270af767	Z80: Fix timing of T80 Int Ack cycles ... Change-Id: Id03770dc349f4a6bceea5875dba3f6c55315b311	2019-11-08 10:39:12 +00:00
David Banks	8724119101	All: rename switches to represent their real function ... Change-Id: I6dd61b8b7165e617363d61df5194e35c1a9dcc92	2019-11-04 09:31:56 +00:00
David Banks	cfce5b1bd7	Z80/6809: rename clocks for consistency ... Change-Id: Iecd3ac5ede39865efc58eaa9e45f5892a44acb82	2019-11-02 19:31:32 +00:00
David Banks	29438683b2	Z80: seperate top level for GODIL and old LX9 ... Change-Id: I1f339996037bb8a20afb7664877e0ed1d53d3868	2019-11-02 14:50:43 +00:00
David Banks	d9f53c1f09	Z80: refactor at top level to better support tristateable outputs ... Change-Id: Ic4a55eb99c85ff2032079d8d12c7d7e44803b6e2	2019-11-02 13:26:00 +00:00
David Banks	b6abb6964a	Z80: Update all builds to 8 comparators and 16KB code ... Change-Id: I8adc986caab323de395301ba397f4c7874e50d49	2019-10-27 17:32:29 +00:00
David Banks	c39cf8649b	Z80: Added mode input to control idle mode ... Change-Id: I59c4696c9921ecad62be0785764fdf35ec9d82d5	2019-10-26 15:35:53 +01:00
David Banks	26f0bea110	Z80: Output NOPs when paused (inc M1) ... Change-Id: I100fac021d68662497fbd2d0c7428dcaf9ef98a3	2019-10-26 15:19:44 +01:00
David Banks	a29aa3015a	lx9_dave z80: increase code space to 32KB ... Change-Id: I7ab22f8cca51184b94e709336b661b8685d02d0b	2019-10-25 17:11:13 +01:00
David Banks	4c746994cb	z80: major rewrite of memory access state machine ... Change-Id: Icc5c7c991120ed155691c1e74517ac02f8ea2ada	2019-10-14 13:35:13 +01:00
David Banks	a25a008ffc	Updated lx9_dave/icez80 for active level shifter design ... Change-Id: I546e1afc0943443f444ae7f55783bac7e3379453	2019-09-20 15:34:34 +01:00