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Dreamcast Ethernet Homebrew Loader (mirrored from SourceForge)
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KallistiOS/dcload-ip
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dcload-ip 1.0.5 A Dreamcast ethernet loader originally by <[email protected]> Features * Load elf, srec, and bin * PC I/O (read, write, etc to PC - compatible with original dcload) * Exception handler * Extremely fast (at least for me - I get 1130Kbyte/sec on 10mbit half-duplex) * Now works on 100mbit (I get 2580Kbyte/sec on 100mbit half-duplex) * Supports both the Broadband Adapter (HIT-0400) and Lan Adapter (HIT-0300) in a single binary Building 1. Edit Makefile.cfg for your system and network, and then run make Installation 1. PC - run make install (installs dc-tool) 2. DC a. cd make-cd, edit Makefile, insert blank cd-r, run make or b. take target-src/1st_read/1st_read.bin and stuff it on a cd yourself (please use the IP.BIN from the make-cd directory if you are going to distribute either cds or cd images) On-screen display * If you see the message "NO ETHERNET ADAPTER DETECTED!", something has gone wrong. The background of the screen will be red. * The correct display is something like: dcload-ip 1.0.4 <- name/version Broadband Adapter (HIT-0400) <- adapter driver in use 00:d0:f1:02:ab:dd <- dc hardware address c0.a8.00.04 <- dc ip address (in hex) idle... <- status The background of the screen will be blue. * For the Broadband Adapter only: if the status line reports "link change..." and does not change back to "idle..." within a short period of time, you may have a cable problem. dcload-ip will not work while "link change..." is displayed, or before it is displayed the first time. The "link change..." message normally is seen when you start dcload-ip, when you execute dc-tool -r, and when you disconnect the ethernet cable. * If an exception is caught while a loaded program is running, the screen will turn lighter blue and display the exception info. dcload-ip should be active again after that point. Testing 1. cd example-src 2. dc-tool -x console-test (tests some PC I/O) 3. dc-tool -x exception-test (generates an exception) 4. dc-tool -x gethostinfo (displays the Dreamcast's ip, and the ip and port of the dc-tool host) KOS GDB-over-dcload To run a GNU debugger session over the dcload connection: 1. Build/obtain an sh-elf targetted GNU debugger 2. Put a 'gdb_init()' call somewhere in the startup area of your KOS-based program 3. Build your program with the '-g' GCC switch to include debugging info 4. Launch your program using 'dc-tool -g -x <prog.elf>' 5. Launch sh-elf-gdb and connect to the dc-tool using 'target remote :2159' 6. Squash bugs Maple Passthrough You can send packets to various maple devices attached to the Dreamcast by sending using the MAPL command. Simply send a command packet to the Dreamcast that is formatted as follows: command id: 'MAPL' command address: 0 (ignored) command size: length of maple packet, in bytes command data: Maple Command (1 byte) Maple Port # (1 byte) Maple Slot # (1 byte) Maple data in 4-byte increments (1 byte) Any data to be sent with the command (multiple of 4 bytes) You will get a similarly formatted response in return. Notes * You can use arp instead of setting the dreamcast's ip in Makefile.cfg * Tested systems: Debian GNU/Linux 2.2-3.0, Cygwin * There are almost certainly bugs * Patches and improvements are welcome; please send to the cadcdev tracker on SourceForge Credits * rtl8139 code based on code by Dan Potter * Lan Adapter driver is pulled from an early version of the KOS LA driver * There are some various files from newlib-1.8.2 here * video.s, maple.c, and maple.h were written by Marcus Comstedt * initial win32 porting and implementation of -t by Florian 'Proff' Schulze * win32 bugfix by The Gypsy * fixes for cygwin by Florian 'Proff' Schulze * rx config bug pointed out by Slant * horridly buggy nature of 1.0.1 + 1.0.2 pointed out by Dan Potter * Fixes for libbfd segfaults by Atani * Inspiration for MAPL packet by Tim Hentenaar
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