Oliver Schmidt [Sun, 19 Jun 2016 16:55:00 +0000 (18:55 +0200)]
Improved doc and samples default target.
The 'all' target deliberately doesn't build the doc nor the samples. But that doesn't mean that the Makefiles in the 'doc' and 'samples' directories must default to the (empty) 'all' target.
Oliver Schmidt [Sun, 19 Jun 2016 13:03:20 +0000 (15:03 +0200)]
Added CONIO cursor support.
For quite some time I deliberately didn't add cursor support to the Apple II CONIO imöplementation. I consider it inappropriate to increase the size of cgetc() unduly for a rather seldom used feature.
There's no hardware cursor on the Apple II so displaying a cursor during keyboard input means reading the character stored at the cursor location, writing the cursor character, reading the keyboard and finally writing back the character read initially.
The naive approach is to reuse the part of cputc() that determines the memory location of the character at the cursor position in order to read the character stored there. However that means to add at least one additional JSR / RTS pair to cputc() adding 4 bytes and 12 cycles :-( Apart from that this approach means still a "too" large cgetc().
The approach implemented instead is to include all functionality required by cgetc() into cputc() - which is to read the current character before writing a new one. This may seem surprising at first glance but an LDA(),Y / TAX sequence adds only 3 bytes and 7 cycles so it cheaper than the JSR / RTS pair and allows to brings down the code increase in cgetc() down to a reasonable value.
However so far the internal cputc() code in question saved the X register. Now it uses the X register to return the old character present before writing the new character for cgetc(). This requires some rather small adjustments in other functions using that internal cputc() code.
The final part of exec() called 'excexit' and only then restored the
stack pointer to its value at program entry. 'excexit' does all
cleanup (the same as '_exit()'), which means that on the atarixl
target the ROM is banked in again. On big programs the 'SP_save'
variable might reside at a high memory address which is no longer
accessible after the ROM has been banked in.
The change just moves the restoration of the stack pointer before
the call to 'excexit'.
Another change lets exec.s compile if UCASE_FILENAME is not defined.
And some other small cleanups, also in open.s.
- Adds new ENOEXEC error code, also used by Apple2 targets.
- Maximum command line length is 40, incl. program name. This is
an XDOS restriction.
- testcode/lib/tinyshell.c has been extended to be able to run
programs.
* libsrc/atari/ucase_fn.s: Fix handling if input parameter 'tmp2' is 0.
* libsrc/atari/open.s: Set 'tmp2' parameter for 'ucase_fn' if DEFAULT_DEVICE
is not defined.
Oliver Schmidt [Sun, 5 Jun 2016 12:58:38 +0000 (14:58 +0200)]
Introduced internal gotoxy that pops both parameters.
About all CONIO functions offering a <...>xy variant call
popa
_gotoxy
By providing an internal gotoxy variant that starts with a popa all those CONIO function can be shortened by 3 bytes. As soon as program calls more than one CONIO function this means an overall code size reduction.
Oliver Schmidt [Fri, 3 Jun 2016 09:08:53 +0000 (11:08 +0200)]
Added --print-target-path option.
If cc65 is installed and used as designed there's no need whatsoever for CC65_HOME (both on *IX and Windows) from the perspective of the cc65 binaries. If the user however has to access files from the 'target' directory thenhe ends up with some assumption on the cc65 installation path nevertheless :-(
In order to avoid this I added the --print-target-path option. It "exports" the logic used by the cc65 binaries to locate their files to the user thus allowing him to leverage the same logic to locate the target files in his build scripts / Makefiles.
Oliver Schmidt [Wed, 1 Jun 2016 21:45:27 +0000 (23:45 +0200)]
Removed shell for-loop.
Just a few of the many reasons why shell for-loops have no place in (GNUmake) Makefiles:
* They don't conform to https://www.gnu.org/software/make/manual/html_node/Utilities-in-Makefiles.html
* They break Windows builds for sure
* They don't fit to make's approach of working with sets
* They break make parallelism
Oliver Schmidt [Wed, 1 Jun 2016 21:00:37 +0000 (23:00 +0200)]
Don't hide build commands.
The samples Makefile serves educational purposes. From that perspective it's counterproductive to hide the actual build commands. Apart fom that it becomes visible if an installed cc65 is used to build the samples.
Oliver Schmidt [Wed, 1 Jun 2016 17:46:02 +0000 (19:46 +0200)]
Don'r presume that the C64 is the only target.
Other targets have disks too and if at some point some one is interested enough to add support for disk creation for other targets too then 'disk' is no good goal name for a C64 disk.
Oliver Schmidt [Wed, 1 Jun 2016 17:41:51 +0000 (19:41 +0200)]
Don't fiddle with foreign files.
No cc65 tool creates *~ files so we don't cleanup *~ files. If some other tool (like an editor) creates *~ files it's up to the user - and only him - to decide when those files are to be deleted !
Atari: add new function '_is_cmdline_dos()' and some other small changes.
- use this function instead of directly looking at _dos_type in the included
targetutil and test programs
- fixes/improvements to the Atari runtime library regarding the recently
changed _dos_type values
- libsrc/atari/targetutil/w2cas.c: exit if no filename was entered
- add documentation for the new function
OzHawk [Wed, 11 May 2016 09:54:16 +0000 (19:24 +0930)]
Update the missing entries in the kernel jump table for the Vic20 with the actual function addresses.
The Vic20 does not have kernal table entries for the following functions.
;-----------------------------------------------------------------------------
; Functions which are not in the kernal jump table for VIC-20 but are for C64
CINT := $E518
IOINIT := $FDF9
RAMTAS := $FD8D
All other kernal entries are the same as the C64, however, without this change, the startup code fails.
Without this change the vic20.lib builds incorrectly.
Greg King [Fri, 22 Apr 2016 15:33:52 +0000 (11:33 -0400)]
Added the optional C keyword "volatile" to the __asm__ statement grammar.
It prevents the statement's Assembly code from being optimized (e.g., moved or removed). Optimization is disabled for that statement's entire function (other functions aren't affected).
projects / cc65 / log