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ProDOS requires for each opened file a user-supplied page-aligned 1024 byte i/o buffer. This makes the generic POSIX file i/o library contained in the cc65 C-library quite heavyweight. In contrast the lightweight pfs implementation uses the uIP packet buffer as ProDOS i/o buffer. Therefore: - Only one file may be open at any time. - That file may not be open while the uIP packet buffer is used by uIP. The open()/read()/close() sequence should be completed before Contiki event scheduling or inside handling a single Contiki event. - The uIP packet buffer must be large enough to hold the ProDOS I/O buffer. Depending on the position of the uIP buffer in memory this means between 1024 and 1024 + 256 bytes. Therefore in an Ethernet environment setting the MTU_SIZE to at least 1266 is safe (So the default of 1500 is just fine). |
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| .. | ||
| lib | ||
| sys | ||
| contiki-conf.h | ||
| contiki-main.c | ||
| contiki.cfg | ||
| linker.cfg | ||
| Makefile.apple2enh | ||
| README | ||
The platform/apple2enh/ directory is used for targeting an Enhanced Apple //e (or compatible) computer. Most things are shared between the 6502-based targets so please consult cpu/6502/README for further details. The following Apple II Ethernet cards are supported: - Uther: Use driver cs8900a.eth with the address $C0x0 (x = 8 + slot number). - LANceGS: Use driver lan91c96.eth with the address $C0x0 (x = 8 + slot number). In most cases it is desirable to use an emulator for the development and testing of a Contiki application. AppleWin is especially well suited as it emulates the Uther Ethernet card in slot 3. It is available at http://applewin.berlios.de/.