OpenCores
URL https://opencores.org/ocsvn/zipcpu/zipcpu/trunk

Subversion Repositories zipcpu

[/] [zipcpu/] [trunk/] - Rev 63

Rev

Go to most recent revision

Filtering Options

Clear current filter

Rev Log message Author Age Path
43 Minor edits to the C++ testbench. dgisselq 3118d 16h /zipcpu/trunk/
42 Oops -- forgot to add the stack. dgisselq 3118d 16h /zipcpu/trunk/
41 Assembly file for the Dhrystone benchmark added. dgisselq 3118d 16h /zipcpu/trunk/
40 Quick update, updates the assembly for the new version of the assembler. dgisselq 3118d 16h /zipcpu/trunk/
39 Here's the documentation update to support the pipelined read/writes of
the bus from the CPU, as well as the test file that proved they worked.		 dgisselq 3121d 19h /zipcpu/trunk/
38 A couple of quick updates:

- The Zip CPU now supports pipelined memory access at one clock per
instruction (assuming all the instructions are in the cache)
- There is now a 'zipbones' module to build a Zip System without peripherals.
Any peripherals would then need to be external to the CPU.
- Some bug fixes.

Documentation changes coming shortly.		 dgisselq 3121d 21h /zipcpu/trunk/
37 Fixed some minor spelling errors. dgisselq 3130d 12h /zipcpu/trunk/
36 *Lots* of changes to increase processing speed and remove pipeline stalls.

Removed the useless flash cache, replacing it with a proper DMA controller.

"make test" in the main directory now runs a test program in Verilator and
reports on the results.		 dgisselq 3131d 01h /zipcpu/trunk/
35 I updated the system diagram to reflect the new version that has a direct
memory access controller, rather than the (useless) manual cache.		 dgisselq 3147d 15h /zipcpu/trunk/
34 Bunches of changes, although very little changed with the core itself.

Regarding the core, some bugs were fixed within zipcpu.v (the CPU part of the
core), so that the debugger can change the program counter. The debugger
can now halt the CPU and then view, examine, and modify registers to include
the program counter, although live changes to the CC register have not been
tested.

There was also a bug in the stall handling of the wishbone bus delay line. This
has now been fixed.

Moving outwards to the system, some parameters have been added to zipsystem
to make it more configurable for whatever environment you might wish to place
it within. Other minor clean ups have taken place, mostly to the internal
documentation.

Lots of changes, though, to the assembler. The big one is the implementation
of #define macros, C style. Several buggy macros were in sys.i. These have
been fixed. The Makefile has been adjusted so that the build of test.S, which
depends upon sys.i, is now properly dependent upon sys.i for make purposes.
Further, not only will zpp, the assembler preprocessor, handle #define macros,
it will also recursive #defines. The assembler expression evaluator has also
been updated to properly handle both operator precedence, as well as modulo
arithmetic.

The master system test file, test.S, found in the sw/zasm directory has been
updated to reflect these new capabilities. (I really need to move it to the
bench/asm directory, so you may expect that change sometime later.)		 dgisselq 3156d 19h /zipcpu/trunk/

< Prev 1 2

Show All

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.