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.
The constructors are _NOT_ allowed anymore to access the BSS. Rather they must use the DATA segment or the INIT segment. The latter isn't cleared at any point so the constructors may use it to expose values to the main program. However they must make sure to always write the values as they are not pre-initialized.
The way we want to use the INITBSS segment - and especially the fact that it won't have the type bss on all ROM based targets - means that the name INITBSS is misleading. After all INIT is the best name from my perspective as it serves several purposes and therefore needs a rather generic name.
Unfortunately this means that the current INIT segment needs to be renamed too. Looking for a short (ideally 4 letter) name I came up with ONCE as it contains all code (and data) accessed only once during initialization.
- No complex shell logic.
- "Source file shadowing" for all targets via vpath.
- Dependency handling.
- True incremental build.
- Don't write into source directories.
- Easy cleanup by just removing 'wrk'.
- cputc was drawing at the wrong position, therefore one line had to be removed as a workaround.
- chline, cvline were drawing one pixel to large lines.
- cclear was drawing an in both directions one pixel to big rect.
- the cursor was drawn at wrong times at wrong places in a wrong size.
git-svn-id: svn://svn.cc65.org/cc65/trunk@5874 b7a2c559-68d2-44c3-8de9-860c34a00d81
However the stack (usually 1 kB) can be securely placed in the secondary area without effort from the side of the developer. The rest of the secondary area (usually 4 kB) is made available to the developer as (uninitialized) 'EXTBSS'.
git-svn-id: svn://svn.cc65.org/cc65/trunk@5696 b7a2c559-68d2-44c3-8de9-860c34a00d81
However now I understand that CBM GEOS does _not_ use PETSCII so the CBM character specification table doesn't make sense at all. After all this is very plausible because GEOS wants to enable the user to share his files across GEOS variants - so we can share the character specification table too.
git-svn-id: svn://svn.cc65.org/cc65/trunk@5527 b7a2c559-68d2-44c3-8de9-860c34a00d81
- According to the "Hitchhiker's Guide To GEOS" GetSerialNumber returns a string on Apple GEOS (in contrast to a number on CBM GEOS).
Given both facts and that the API is presumably not important at all it seems reasonable to just go without it on Apple GEOS.
git-svn-id: svn://svn.cc65.org/cc65/trunk@5503 b7a2c559-68d2-44c3-8de9-860c34a00d81
