| Rev |
Log message |
Author |
Age |
Path |
| 193 |
These changes make it so the ALU multiplies pass a test-bench. |
dgisselq |
2975d 02h |
/zipcpu/trunk/rtl/Makefile |
| 157 |
Added the divide unit to the list of ZipCPU dependencies. |
dgisselq |
3116d 20h |
/zipcpu/trunk/rtl/Makefile |
| 105 |
Fixed some nasty early branching bugs. Adjusted the Makefile to declare that
cpudefs.h was automatically generated from cpudefs.v, and made sure that
zipbones included the cpudefs.v so it could get the DEBUG_SCOPE define.
In addition, the test.S was updated to test long jumps, the early branching
bug we found, and all three early branching instructions: ADD #x,PC, LOC(PC),PC,
and LDI #x,PC. |
dgisselq |
3214d 05h |
/zipcpu/trunk/rtl/Makefile |
| 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 |
3292d 04h |
/zipcpu/trunk/rtl/Makefile |
| 56 |
Here's a bit of work in progress for getting the Zip CPU working on a XuLA2
board. Many changes include: the existence of a cpudefs.v file to control
what "options" are included in the ZipCPU build. This allows build control
to be separated from the project directory (one build for a XuLA2 board,
another for a Basys-3 development board). Other changes have made things
perhaps harder to read, but they get rid of warnings from XST.
A big change was the addition of the (* ram_style="distributed" *) comment
for the register set. This was necessary to keep XST from inferring a block
RAM and breaking the logic that was supposed to take place between a register
read and when it was used. |
dgisselq |
3363d 07h |
/zipcpu/trunk/rtl/Makefile |
| 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 |
3376d 04h |
/zipcpu/trunk/rtl/Makefile |
| 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 |
3385d 07h |
/zipcpu/trunk/rtl/Makefile |
| 18 |
A couple of changes: Registers can now be changed via the debug interface.
Also, in anticipation of being able to interrupt the break the processor,
the CPU now exports an interrupt line to the external environment to tell
when it has been halted. Thus, if it gets halted by a break instruction,
the ZipSystem will interrupt whatever's in its environment so that the
debugger can come and examine its state.
Oh, and one other: because you can't examine the state of the CPU without
halting it, I modified the debug control register to export the four
useful flags: break-enable, interrupts enabled, and sleep (step comes for
free in this implementation). |
dgisselq |
3420d 20h |
/zipcpu/trunk/rtl/Makefile |
| 2 |
An initial load. No promises of what works or not, but this is where the
project is at. |
dgisselq |
3440d 23h |
/zipcpu/trunk/rtl/Makefile |
