Differences

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--- preparing_a_build_environment_in_cygwin [2016/07/05 15:00]
– initial info on installing cygwin gurce
+++ preparing_a_build_environment_in_cygwin [2021/06/19 00:35] (current)
– [3) Build and install gcc+ghdl] gurce
@@ Line 3: / Line 3: @@
 Building this project requires a few prerequisite tools that stem from the GNU/Linux world, such as:
-  * gcc compiler
+  * **gcc** (c compiler)
-  * make
+  * **make** (used to execute Makefile targets/recipes to perform various build-related tasks)
-  * ghdl
+  * **ghdl** (vhdl simulator)
+  * **ophis** (8-bit cross compiler)
+  * **git** (the version-control tool used by this project, and by several of its prerequisite projects)
 So if you are predominantly a windows developer and want to contribute to the project, but feel a bit overwhelmed at the thought of jumping ship to Linux, then installing Cygwin in your Windows environment can be a good compromise.
@@ Line 49: / Line 51: @@
   * Stick with the default "**(x) Select required packages (RECOMMENDED)**"
     * then click "**Next**"
+    * {{http://gurce.net/Logs/images/img_2016_06_21_14_06.png}}
   * Patiently wait for it all to install... :)
   * On the final screen:
@@ Line 56: / Line 59: @@
   * {{http://gurce.net/Logs/images/img_2016_06_21_14_59.png}}
-You can now run cygwin from "Start Menu >> Programs >> Cygwin >> Cygwin Terminal":
+You can now run cygwin from "**Start Menu >> Programs >> Cygwin >> __Cygwin Terminal__**":
 {{http://gurce.net/Logs/images/img_2016_06_21_14_12.png}}
+===== Cygwin Prerequisites =====
+Run the Cygwin setup exe again and install the following packages:
+  * **gcc-core**
+  * **gcc-g++**
+  * **gcc-ada**
+  * **gdb**
+  * **gmp-devel**
+  * **mpfr-devel**
+  * **libmpc-devel**
+  * **wget**
+  * **git**
+  * **libpng-devel**
+For example, for "**libpng-devel**", search for it via this step in the wizard and click on it so the "**[x]**" checkmark appears next to it.
+{{http://gurce.net/Logs/images/img_2016_06_24_7_26.png}}
+Note that you can search and select multiple items this way prior to clicking on the wizard's "**Next**" button. (ie, you don't need to run the cygwin setup exe once per package, do all packages at once :))
+===== Retrieve the MEGA65 source code =====
+The source code for the MEGA65 project is housed in a git repository hosted by github.
+To retrieve it, inside the Cygwin Terminal, do the following:
+  * **cd ~** (ie, go to your home folder)
+  * **git clone https://github.com/MEGA65/mega65-core.git**
+The source-code will then be placed in the "~/mega65-core" path.
+===== Installing Ophis =====
+This refers to [[https://michaelcmartin.github.io/Ophis/|Michael Martin's Ophis Assembler]].
+It is a cross-compiler for the 6502-family of processors. Paul has tweaked it so that it can also support his new 4502 processor.
+You'll need to grab it from Paul's github fork of Ophis, as follows:
+  * **cd ~**
+  * **git clone https://github.com/gardners/Ophis.git**
+__NOTE__: Ophis needs to be housed within the same parent-folder that you previously cloned the mega65 code to, as the mega65 code uses relative-paths to access it. So if you chose a different parent-folder for your mega65 code to that shown in these docs, make sure you put Ophis in that location too!
+__NOTE2__: You won't need to compile Ophis as it is written in python. I believe the default Cygwin install comes with python. If you find this isn't the case for you, please install it via the cygwin setup exe.
+===== Installing GHDL =====
+GHDL is a vhdl simulator, allowing you to assess how the vhdl code behaves without having to wait an hour or so for the bitstream to build/synthesise.
+It also needs to be built from the source, so here are some steps for getting it done.
+==== 1) Grab the source for gcc v4.9.3 ====
+  * **cd ~/Downloads**
+  * **wget http://mirror.aarnet.edu.au/pub/gnu/gcc/gcc-4.9.3/gcc-4.9.3.tar.gz**
+  * **mkdir gcc**
+  * **cd gcc**
+  * **tar xvf ../gcc-4.9.3.tar.gz**
+    * (wait patiently for it all to decompress)
+==== 2) Grab the latest version of ghdl via git and copy its source into gcc ====
+  * **cd ~/Downloads**
+  * **%%git clone http://git.code.sf.net/p/ghdl-updates/ghdl-updates.git ghdl-updates --config core.autocrlf=input%%**
+  * **cd ghdl-updates**
+  * **%%./configure --with-gcc=$HOME/Downloads/gcc/gcc-4.9.3%%**
+  * **make copy-sources**
+==== 3) Build and install gcc+ghdl ====
+  * **cd ~/Downloads/gcc/**
+  * **mkdir gcc-objs; cd gcc-objs**
+  * **%%../gcc-4.9.3/configure --prefix=/opt/gcc-4.9.3 --enable-languages=c,vhdl --disable-bootstrap --disable-lto --disable-multilib%%**
+  * **make -j2**
+    * If you get an error saying "//../../gcc-4.9.3/libcpp/system.h:142:63: error: ‘fputs_unlocked’ was not declared in this scope//":
+      * Edit the "**gcc-4.9.3/libcpp/system.h**" file
+      * Towards the start of the file, add "**#define __GNU_VISIBLE 1**" (prior to "#include <stdio.h>")
+      * run **make -j2** again
+    * If you get an error saying "//: No such file or directory//", try typing:
+      * **export SHELLOPTS**
+      * **set -o igncr**
+      * run **make -j2** again
+  * **make install**
+  * **rm /usr/bin/ghdl**
+  * **ln -s /opt/gcc-4.9.3/bin/ghdl.exe /usr/bin/ghdl**
+  * As a test, try typing "**%%ghdl --disp-config%%**"
+  * take a look at the output, and assure that there's no text anywhere that says "//ghdl: installation problem://". If not, your ghdl exe is good to go! :)
+==== 4) Take it for a spin! ====
+  * **cd ~/mega65**
+  * **make simulate**
+  * this churns away at quite a lot of *.vhdl files this time, no errors given
+  * then you will get a "**cpu_test.exe**" file
+  * Then give Paul's suggestion a try, of:
+    * **./cpu_test.exe 2>&1 | grep gs4510 | grep MAP**
+You should start seeing cpu instructions being outputted to the screen as they are executed, something like the following:
+<code>
+gs4510.vhdl:915:9:@980ns:(report note): $8100 4C D3 8C  jmp  $8CD3         A:11 X:22 Y:33 Z:00 SP:BEFF P:24 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.I..
+gs4510.vhdl:915:9:@1060ns:(report note): $8CD3 78        sei                A:11 X:22 Y:33 Z:00 SP:BEFF P:24 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.I..
+gs4510.vhdl:915:9:@1220ns:(report note): $8CD4 A9 00     lda  #$00          A:00 X:22 Y:33 Z:00 SP:BEFF P:26 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.IZ.
+gs4510.vhdl:915:9:@1500ns:(report note): $8CD6 8D 00 BF  sta  $BF00         A:00 X:22 Y:33 Z:00 SP:BEFF P:26 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.IZ.
+gs4510.vhdl:915:9:@1900ns:(report note): $8CD9 4C E5 8C  jmp  $8CE5         A:00 X:22 Y:33 Z:00 SP:BEFF P:26 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.IZ.
+gs4510.vhdl:915:9:@2220ns:(report note): $8CE5 20 8E 8C  jsr  $8C8E         A:00 X:22 Y:33 Z:00 SP:BEFD P:26 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.IZ.
+gs4510.vhdl:915:9:@2300ns:(report note): $8C8E 78        sei                A:00 X:22 Y:33 Z:00 SP:BEFD P:26 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.IZ.
+gs4510.vhdl:915:9:@2380ns:(report note): $8C8F D8        cld                A:00 X:22 Y:33 Z:00 SP:BEFD P:26 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.IZ.
+gs4510.vhdl:915:9:@2460ns:(report note): $8C90 03        see                A:00 X:22 Y:33 Z:00 SP:BEFD P:26 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.IZ.
+gs4510.vhdl:915:9:@2540ns:(report note): $8C91 38        sec                A:00 X:22 Y:33 Z:00 SP:BEFD P:27 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.IZC
+gs4510.vhdl:915:9:@2860ns:(report note): $8C92 20 EC 95  jsr  $95EC         A:00 X:22 Y:33 Z:00 SP:BEFB P:27 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.IZC
+gs4510.vhdl:915:9:@3180ns:(report note): $95EC B0 06     bcs  $95F4         A:00 X:22 Y:33 Z:00 SP:BEFB P:27 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.IZC
+gs4510.vhdl:915:9:@3340ns:(report note): $95F4 A9 47     lda  #$47          A:47 X:22 Y:33 Z:00 SP:BEFB P:25 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.I.C
+gs4510.vhdl:915:9:@3620ns:(report note): $95F6 8D 2F D0  sta  $D02F         A:47 X:22 Y:33 Z:00 SP:BEFB P:25 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.I.C
+gs4510.vhdl:915:9:@3780ns:(report note): $95F9 A9 53     lda  #$53          A:53 X:22 Y:33 Z:00 SP:BEFB P:25 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.I.C
+gs4510.vhdl:915:9:@4060ns:(report note): $95FB 8D 2F D0  sta  $D02F         A:53 X:22 Y:33 Z:00 SP:BEFB P:25 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.I.C
+gs4510.vhdl:915:9:@4460ns:(report note): $95FE 60        rts                A:53 X:22 Y:33 Z:00 SP:BEFD P:25 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.I.C
+gs4510.vhdl:915:9:@4860ns:(report note): $8C95 AD 31 D0  lda  $D031         A:61 X:22 Y:33 Z:00 SP:BEFD P:25 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.I.C
+gs4510.vhdl:915:9:@5020ns:(report note): $8C98 09 40     ora  #$40          A:61 X:22 Y:33 Z:00 SP:BEFD P:25 $01=F5 MAPLO:4000 MAPHI:3F00   ..E-.I.C
+</code>