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Rev Log message Author Age Path
109 This file is now marked as obsolete. dgisselq 2952d 15h /zipcpu/
108 Just to clarify expectations ... this makefile hardly builds anything. dgisselq 2962d 17h /zipcpu/
107 Adding a missing file. dgisselq 2963d 08h /zipcpu/
106 Updated to allow building without the sources for the graphics used in the
document.		 dgisselq 2963d 12h /zipcpu/
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 2968d 15h /zipcpu/
104 An updated build script, actually builds zip-gcc. dgisselq 2969d 16h /zipcpu/
103 A barely functional, but somewhat working, version of GCC to check in.
If the Lord is willing, it should be accompanied by a newlib port soon.
That port should move the GCC status from barely functional but somewhat
working to functional and working, although not (yet) complete.		 dgisselq 2969d 20h /zipcpu/
102 Updated bugfix version of the binutils patch, and a first patch of GCC.
The GCC patch is undergoing ongoing and active development. It is also known to
continue to contain active bugs. (It's not done yet.)		 dgisselq 2972d 05h /zipcpu/
101 Adjusted the "BREAK" instruction so that it will now disassemble properly
with an operand. This was necessary to create a (trap_if ...) instruction
for the GCC compiler.		 dgisselq 2974d 07h /zipcpu/
100 Some changes to support early branching: branches are now ADD #x,PC instructions
instead of MOV #x(PC),PC--providing greater range to the CPU. When that range
is insufficient, ZPARSER now recognizes long jump instructions coded as
LOD (PC),PC followed by the jump address. (This change was made necessary by
the need to build an assembler/linker that could create instructions that would
jump to any address in the 32-bit address space. In short, a part of the
ongoing GCC upgrade and rework.)		 dgisselq 2974d 07h /zipcpu/

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