Subversion Repositories zipcpu

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Rev Log message Author Age Path
78 Found/corrected annoying bug in floating point documentation of the opcode
dgisselq 2588d 16h /
77 First check-in: the test bench for the divide instruction. dgisselq 2589d 15h /
76 The biggest change here was to zippy_tb, to make it more similar to the debugger
and to make it work with VLIW-type instructions.
dgisselq 2589d 15h /
75 Modified for VLIW instructions. dgisselq 2589d 15h /
74 Added a bunch of debugging code to the Dhrystone benchmark assembly file, as
well as two new testing assembly files.
dgisselq 2589d 15h /
73 Documentations updates. dgisselq 2589d 15h /
72 Some updated graphics, now containing images of the CPU that include the
divide and (currently non-existant) floating point unit.
dgisselq 2589d 15h /
71 This contains a bunch of bug fixes. (A lot ...) For example, the pipeline
stall code has also seriously changed, to fixed the pipeline memory load/op
stage conflict, while maintaining no-stall operation for operands that don't
need an offset. This had a cascading effect, however, so that the multiply
could no longer complete in a single cycle. Therefore, the timing on the
multiplies was slowed down to two cycles from a single cycle. (It's the
only two-cycle ALU operation ...) The illegal instruction code has also been
fixed, so that illegal instructions no longer stalls the prefetch bus.
dgisselq 2589d 15h /
70 Updated the assembler support files, zopcodes in particular, to handle
the disassembly of the new very long instruction word codes.
dgisselq 2589d 15h /
69 This implements the "new Instruction Set" architecture for the Zip CPU. It's
a massive change set, that touches just about everything but probably not
enough of everything. Please see the spec.pdf for a description of this
new architecture.
dgisselq 2595d 19h /

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