197 lines
8.9 KiB
Markdown
197 lines
8.9 KiB
Markdown
# A3Driverutil
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Python program to convert o65 relocatable binary files for use as Apple /// drivers, plus support for adding/updating and removing drivers from the sos.driver file.
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The normal procedure for assembling Apple /// drivers is to load the assembler source file into either an emulator or real Apple II or /// computer. And then use the Pascal assembler to assemble and create the required relocatable PCD object file that the Apple /// System Utilities SCP accepts. I bumped into the o65 relocatable binary format while looking around the internet and then noticed that the ca65 assembler includes support for this. I wondered if this could be used and converted for use in driver development.
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The spec for the o65 file is available here, plus detail on the usages, etc. :
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http://6502.org/users/andre/o65/
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I've been trying to learn python more, so this seemed like a good excuse to delve into it a bit more. The resultant program has expanded quite a bit on the original idea, and its added a bit of scp functionality to it, eg list, add, delete, update and extract drivers from a SOS.DRIVER file.
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# Usage
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## Convert o65 binary and add/update to a SOS.DRIVER file
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To support the conversion process and the o65 format, the ca65 source file needs the comment part in the 'TEXT' segment, and the code part in the 'DATA' segment.
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An example skeleton source file is shown below:
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(see examples in the Drivers folder)
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```
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.setcpu "6502"
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.reloc
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;
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;driver comment field
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;this is put in the TEXT segment so we can get the length and output it ok
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;
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.segment "TEXT"
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.word $FFFF ;Comment follows..
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.word 12 ;12 bytes long
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.byte "Test Driver."
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;
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;Driver code part
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;this is put in the DATA segement
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;
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.segment "DATA"
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DIB: .word 0000 ; link
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.word START ; entry point
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.byte 05 ; name len
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.byte ".TEST " ; device name
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........rest of the code
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.endproc
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```
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Then we assemble and link this with ca65 and ld65 using the Apple3_o65.cfg file (see files)
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```
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ca65.exe test.s -l test.lst
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ld65.exe test.o -o test.o65 -C Apple3_o65.cfg
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```
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Once we have the binary, then we can convert it and add/update to an existing SOS.DRIVER file. Note 'add' will check to see if the drivername already exists, and then only add if it does not. Once a driver exists in a SOS.DRIVER file, then the 'update' command can be used. Update will only update if the driver exists. The program uses the driver name from the converted o65 file, so there is no need to specify it on the command line.
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```
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python A3Driverutil.py add test.o65 SOS.DRIVER
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```
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Then we can use the disk util of choice to add to a dsk image and run in an emulator or a real machine.
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I have used a windows batch file to automate this process to enable quick driver testing, an example of mine is shown here:
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(i'm a windows user, so you can adapt as required)
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```
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@REM Driver make/update
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@REM Variables
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SET FILENAME=grafix
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SET DISKIMAGE=C:\Storage\Projects\o65\batchtest\grafixtest.dsk
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@REM assemble and link source file
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ca65.exe %FILENAME%.s -l %FILENAME%.lst
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ld65.exe %FILENAME%.o -o %FILENAME%.o65 -C Apple3_o65.cfg
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@REM extract existing SOS.DRIVER file from disk image
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java -jar ac.jar -g %DISKIMAGE% SOS.DRIVER > SOS.DRIVER#0c0000
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@REM convert the o65 and update existing driver in the SOS.DRIVER file
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C:\python27\python.exe A3Driverutil.py update %FILENAME%.o65 SOS.DRIVER#0c0000
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@REM delete and then add updated SOS.DRIVER file to the disk image
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java -jar ac.jar -d %DISKIMAGE% SOS.DRIVER
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java -jar ac.jar -p %DISKIMAGE% SOS.DRIVER SOS $0000 < SOS.DRIVER#0c0000
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@REM run the disk image in Mess
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C:\Storage\_emu\Mess\mess.exe apple3 -rompath C:\Storage\_emu\Mess\roms -skip_gameinfo -resolution 640x480 -window -flop1 %DISKIMAGE%
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```
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Command line syntax for these Options:
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```
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usage: A3Driverutil.py add [-h] o65file sosfile
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positional arguments:
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o65file Input o65 code file to be converted
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sosfile SOS.DRIVER file to add driver to (driver must not already exist)
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usage: A3Driverutil.py update [-h] o65file sosfile
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positional arguments:
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o65file Input o65 code file to be converted
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sosfile SOS.DRIVER file to be updated (an existing driver will be updated)
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```
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## Convert o65 binary and output as driver binary file
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This converts the o65 binary and outputs as a binary file with comment length, comment, code length, code, reloc length and reloc table. This is the same output format as the extract command.
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```
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usage: A3Driverutil.py bin [-h] o65file binfile
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positional arguments:
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o65file Input o65 code file to be converted
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binfile Binary output file
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```
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## Convert o65 binary and output as SOS.DRIVER file
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This converts the o65 binary and outputs as a SOS.DRIVER that contains just one driver. The program adds a full SOS.DRIVER file header structure, ie 'SOS DRVR' and dummy char set and keyboard map. This allows the file to be loaded as a secondary driver file with SCP. ie read in a full SOS.DRIVER file with SCP, and then read this one in as a secondary one to add to the other drivers.
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```
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usage: A3Driverutil.py sos [-h] o65file sosfile
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positional arguments:
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o65file Input o65 code file to be converted
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sosfile SOS.DRIVER Binary output file
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```
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## List Drivers in a SOS.DRIVER file
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This will list the drivers contained in a SOS.DRIVER file.
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```
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usage: A3Driverutil.py list [-h] sosfile
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positional arguments:
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sosfile SOS.DRIVER file to list drivers in
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Example:
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A3Driverutil.py list SOS.DRIVERtdm#0c0000
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DriverName Status Slot Unit Manid Release
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.GRAFIX active N/A 00 0001 1300
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.AUDIO active N/A 00 0001 1000
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.FMTD1 active N/A 00 0001 1300
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.FMTD2 active N/A 01 0001 1300
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.FMTD3 inactive N/A 02 0001 1300
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.FMTD4 inactive N/A 03 0001 1300
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.RS232 active N/A 00 0001 1300
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.PARPRINTER active 1 00 0001 1300
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.SILENTYPE active N/A 00 0001 1040
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.PROFILE active 1 00 4453 1000
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.CFFA3000D2 active 1 01 4453 1000
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.CFFA3000D3 active 1 02 4453 1000
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.CFFA3000D4 active 1 03 4453 1000
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.CFFA3000D5 active 1 04 4453 1000
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.CFFA3000D6 active 1 05 4453 1000
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.CFFA3000D7 active 1 06 4453 1000
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.CFFA3000D8 active 1 07 4453 1000
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.CONSOLE active 4 00 0001 1310
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.MOUSE active 4 01 5555 2310
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.DESKTOPMANAGER active N/A 00 3333 1400
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Total size: 42496
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```
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The list also displays the total size of the SOS.DRIVER file. This program does not do any specific size checking currently, so you will need to keep an eye on this. I think I have read that SOS will work with up to around 60k, but i think the System Utils will not allow you to create one this big.
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## Extract driver code from SOS.DRIVER file
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I added this to allow a driver to be extracted from a SOS.DRIVER file. There are two options available here.
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### 1. extract
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This extracts the complete driver block of data from the SOS.DRIVER file and outputs as one file. This includes the comment length, comment, code length, code, relocation length and relocation data. This is more for future use, maybe i need to add a way to add this back into another sos.driver.
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```
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usage: A3Driverutil.py extract [-h] drivername sosfile
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positional arguments:
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drivername Name of driver to be extracted (include . eg: ".console"
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sosfile SOS.DRIVER file to extract the driver from
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```
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### 2. extractcode
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This one extracts just the code for a specified driver, and then relocates it to $2000 base address. This is for use when disassembling a driver as there is no ambiguity with the zero page as there would be if the base address was $0000. You can then use your disassembler of choice to disassemble the code block.
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```
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usage: A3Driverutil.py extractcode [-h] drivername sosfile
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positional arguments:
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drivername Name of driver to be extracted (include . eg: ".console"
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sosfile SOS.DRIVER file to extract the driver from
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```
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## Delete driver code from the SOS.DRIVER file
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This allows a driver to be deleted from a SOS.DRIVER file.
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```
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usage: A3Driverutil.py delete [-h] drivername sosfile
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positional arguments:
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drivername Name of driver to be deleted (include . eg: ".console"
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sosfile SOS.DRIVER file to delete the driver from
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```
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