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[/] [zipcpu/] [trunk/] - Rev 129

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109 This file is now marked as obsolete. dgisselq 2925d 18h /zipcpu/trunk
108 Just to clarify expectations ... this makefile hardly builds anything. dgisselq 2935d 20h /zipcpu/trunk
107 Adding a missing file. dgisselq 2936d 11h /zipcpu/trunk
106 Updated to allow building without the sources for the graphics used in the
document.
dgisselq 2936d 15h /zipcpu/trunk
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 2941d 18h /zipcpu/trunk
104 An updated build script, actually builds zip-gcc. dgisselq 2942d 18h /zipcpu/trunk
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 2942d 23h /zipcpu/trunk
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 2945d 07h /zipcpu/trunk
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 2947d 10h /zipcpu/trunk
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 2947d 10h /zipcpu/trunk

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