Initial commit 0.13.9.16

1 files changed, 83 insertions, 0 deletions

diff --git a/src/fake86/netcard.c b/src/fake86/netcard.c
new file mode 100755
index 0000000..ab7d6d5
--- /dev/null
+++ b/src/fake86/netcard.c
@@ -0,0 +1,83 @@
+/*
+  Fake86: A portable, open-source 8086 PC emulator.
+  Copyright (C)2010-2013 Mike Chambers
+
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the GNU General Public License
+  as published by the Free Software Foundation; either version 2
+  of the License, or (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*/
+
+/* netcard.c: this is a simple custom ethernet adapter interface for Fake86.
+   it's not modeled after a real-world ethernet adapter, thus i had to create
+   own DOS packet driver for programs to make use of it. this packet driver
+   is included with this source code, in the data/ directory. the filename is
+   pd.com - inject this file into any floppy or hard disk image if needed! */
+
+#include "config.h"
+#ifdef NETWORKING_ENABLED
+#ifdef NETWORKING_OLDCARD
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include "cpu.h"
+
+extern uint8_t verbose;
+extern union _bytewordregs_ regs;
+extern uint8_t	RAM[0x100000], readonly[0x100000], ethif;
+extern uint16_t	segregs[4];
+extern void sendpkt (uint8_t *src, uint16_t len);
+
+struct netstruct {
+	uint8_t enabled;
+	uint8_t canrecv;
+	uint16_t pktlen;
+} net;
+
+void nethandler() {
+	uint32_t i;
+	if (ethif==254) return; //networking not enabled
+	switch (regs.byteregs[regah]) { //function number
+			case 0x00: //enable packet reception
+				net.enabled = 1;
+				net.canrecv = 1;
+				return;
+			case 0x01: //send packet of CX at DS:SI
+				if (verbose) {
+						printf ("Sending packet of %u bytes.\n", regs.wordregs[regcx]);
+					}
+				sendpkt (&RAM[ ( (uint32_t) segregs[regds] << 4) + (uint32_t) regs.wordregs[regsi]], regs.wordregs[regcx]);
+				return;
+			case 0x02: //return packet info (packet buffer in DS:SI, length in CX)
+				segregs[regds] = 0xD000;
+				regs.wordregs[regsi] = 0x0000;
+				regs.wordregs[regcx] = net.pktlen;
+				return;
+			case 0x03: //copy packet to final destination (given in ES:DI)
+				memcpy (&RAM[ ( (uint32_t) segregs[reges] << 4) + (uint32_t) regs.wordregs[regdi]], &RAM[0xD0000], net.pktlen);
+				return;
+			case 0x04: //disable packets
+				net.enabled = 0;
+				net.canrecv = 0;
+				return;
+			case 0x05: //DEBUG: dump packet (DS:SI) of CX bytes to stdout
+				for (i=0; i<regs.wordregs[regcx]; i++) {
+						printf ("%c", RAM[ ( (uint32_t) segregs[regds] << 4) + (uint32_t) regs.wordregs[regsi] + i]);
+					}
+				return;
+			case 0x06: //DEBUG: print milestone string
+				//print("PACKET DRIVER MILESTONE REACHED\n");
+				return;
+		}
+}
+#endif
+#endif