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105 lines
2.7 KiB
105 lines
2.7 KiB
13 years ago
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z80sim README
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^^^^^^^^^^^^^
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This port uses a primitive, emulated Z80 and the SDCC toolchain.
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The instruction set emulator can be found in the NuttX SVN at
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http://nuttx.svn.sourceforge.net/viewvc/nuttx/trunk/misc/sims/z80sim
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The SDCC toolchain is available from http://sdcc.sourceforge.net/. All
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testing has been performed using version 2.6.0 of the SDCC toolchain.
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Configuring NuttX
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^^^^^^^^^^^^^^^^^
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ostest
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This configuration performs a simple, minimal OS test using
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examples/ostest. This can be configurated as follows:
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cd tools
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./configure.sh z80sim/ostest
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cd -
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. ./setenv.sh
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nsh
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This configuration file builds NSH (examples/nsh). This
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configuration is not functional due to issues with use of the
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simulated serial driver (see the TODO list).
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This configuration can be selected by:
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cd tools
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./configure.sh z80sim/nsh
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cd -
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. ./setenv.sh
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pashello
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Configures to use examples/pashello for execution from FLASH
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See examples/README.txt for information about pashello.
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This configuration is not usable because the resulting binary
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is too large for the z80 address space.
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This configuration can be selected by:
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cd tools
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./configure.sh z80sim/pashello
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cd -
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. ./setenv.sh
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Building the SDCC toolchain
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The SDCC toolchain is built with the standard configure/make/make install
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sequence. However, some special actions are required to generate libraries
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compatible with this build. First start with the usual steps
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download
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unpack
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cd sdcc
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./configure
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But before making, we need to apply a patch to the SDCC 2.6.0 source
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so that the z80 assembler can handle long symbol names
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Apply sdcc-2.6.0-asz80-symlen.patch
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cd sdcc/device/lib
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Then make the SDCC binaries
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cd sdcc
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make
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and install SDCC:
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sudo make install
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SDCC Update
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^^^^^^^^^^^
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I have had some problems building sdcc-2.6.0 on my current UBUNTU
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release (9.10). I had other problems building sdcc-2.9.0 on UBUNTU 9.10.
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I suspect that the newer gcc toolchains are causing problems for these
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older SDCC releases.
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A 20091106 snapshot did build with no major problems on UBUNTU 9.10, but
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has some compatibilty problems with the older SDCC compiler. For one, you
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will need to change the Z80 assember name and options in the Make.defs
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files as follows:
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-AS = as-z80
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+AS = sdasz80
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- @$(AS) $(ASFLAGS) $2 $1
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+ $(AS) $(ASFLAGS) $1
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For another, I had other problems building with that 20091106 that look
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like compiler bugs. If you are using UBUNTU 9.10, you may have to either
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(1) downgrade your GCC compiler to a version 3.x compiler and use one of
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the older stable releases, or (2) wait for the next stable SDCC release
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after 2.9.0.
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