TG68 - Execute 68000 Code - Adapted Version for Minimig Core
Details
Category: Processor
Created: November 26, 2007
Updated: January 27, 2020
Language: VHDL
Other project properties
Development Status: Stable
Additional info: Design done, FPGA proven
WishBone compliant: No
WishBone version: n/a
License: LGPL
Description
This is a stable Version of a 68000 compatible CPU.
It is an adapted Version to use with the Minimig Core.
"compatible" means that most of byte and word Instructions are cycle exact but many other Instructions are faster.
"adapted" means that the synchronous Mode, some bus control signals and the FC Out are missing. They are not needed for the minimig.
Features
circa 3600 LC's on a ALTERA Cyclone II,
circa 2700 Slices an a XILINX Spartan 3,
Status
Tested with the Dennis van Weeren Minimig Core on the C-One Board with FPGA Extender from Individual Computers.
Source Code and Bitstreamfiles here:
http://c64upgra.de/c-one
latest bugfix:
14.jun.2010 bugfix Movem with regmask=XFFFF and regmask=X0000
Add missing Illegal $4AFC
10.feb.2009 shift and rotation opcode
21.jan.2009 insert missing RTR opcode
