--- /dev/null
+// Interface to the DS80C400 ROM functions. Largely based on code released
+// by Dallas, hence the following copyright.
+
+// ---------------------------------------------------------------------------
+// Copyright (C) 2003 Dallas Semiconductor Corporation, All Rights Reserved.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+// IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES
+// OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+// Except as contained in this notice, the name of Dallas Semiconductor
+// shall not be used except as stated in the Dallas Semiconductor
+// Branding Policy.
+// ---------------------------------------------------------------------------
+
+#include <stdio.h>
+#include <ds400rom.h>
+
+// Register bank 3 equates.
+#define R0_B3 0x18
+#define R1_B3 0x19
+#define R2_B3 0x1A
+#define R3_B3 0x1B
+#define R4_B3 0x1C
+#define R5_B3 0x1D
+#define R6_B3 0x1E
+#define R7_B3 0x1F
+
+
+// The bank the ROM is stored in. Should be 0FFh for production
+// 400's. Change this value when running with a debug ROM.
+
+#define ROM_BANK 0xFF
+
+// The address of the ROM export table is stored
+// at (ROM_BANK << 16) | ROM_EXPORTTABLE_OFFS
+
+#define ROM_EXPORTTABLE_OFFS 2
+
+//
+// Each entry in the ROM export table is 3 bytes.
+//
+#define ROMXT_ENTRYSIZE 3
+
+//
+// The number of functions in the ROM export table is stored
+// first in the export table.
+//
+#define ROMXT_NUMFUNCTIONS (0 * ROMXT_ENTRYSIZE)
+
+//
+// ROM EXPORT TABLE FUNCTIONS (denoted with ROMXT)
+//
+
+// UTILITY functions
+#define ROMXT_CRC16 (1 * ROMXT_ENTRYSIZE) //
+#define ROMXT_MEM_CLEAR_16 (2 * ROMXT_ENTRYSIZE) //
+#define ROMXT_MEM_COPY_16 (3 * ROMXT_ENTRYSIZE) //
+#define ROMXT_MEM_COMPARE (4 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ADD_DPTR1_16 (5 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_ADD_DPTR2_16 (6 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_SUB_DPTR1_16 (7 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_SUB_DPTR2_16 (8 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_GETPSEUDORANDOM (9 * ROMXT_ENTRYSIZE) //
+
+// MEMORY MGR
+#define ROMXT_KERNELMALLOC (10 * ROMXT_ENTRYSIZE) // not exposed
+#define ROMXT_KERNELFREE (11 * ROMXT_ENTRYSIZE) // not exposed
+#define ROMXT_MM_MALLOC (12 * ROMXT_ENTRYSIZE) // exposed as redirected function
+#define ROMXT_MM_MALLOC_DIRTY (13 * ROMXT_ENTRYSIZE) // exposed as redirected function
+#define ROMXT_MM_FREE (14 * ROMXT_ENTRYSIZE) // exposed as redirected function
+#define ROMXT_MM_DEREF (15 * ROMXT_ENTRYSIZE) // exposed as redirected function
+#define ROMXT_GETFREERAM (16 * ROMXT_ENTRYSIZE) // exposed as redirected function
+
+// SOCKET functions
+#define ROMXT_ROM_SOCKET (17 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_CLOSESOCKET (18 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_SENDTO (19 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_RECVFROM (20 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_CONNECT (21 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_BIND (22 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_LISTEN (23 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_ACCEPT (24 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_RECV (25 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_SEND (26 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_GETSOCKOPT (27 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_SETSOCKOPT (28 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_GETSOCKNAME (29 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_GETPEERNAME (30 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_CLEANUP (31 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_AVAIL (32 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_JOIN (33 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_LEAVE (34 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_PING (35 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_GETNETWORKPARAMS (36 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_SETNETWORKPARAMS (37 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_GETIPV6PARAMS (38 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_GETETHERNETSTATUS (39 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_GETTFTPSERVER (40 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_SETTFTPSERVER (41 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ETH_PROCESSINTERRUPT (42 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_ARP_GENERATEREQUEST (43 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_NET_ETH0_MAC_ID (44 * ROMXT_ENTRYSIZE) //
+
+// DHCP functions
+#define ROMXT_DHCP_INIT (45 * ROMXT_ENTRYSIZE) //
+#define ROMXT_DHCP_SETUP (46 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_DHCP_STARTUP (47 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_DHCP_RUN (48 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_DHCP_STATUS (49 * ROMXT_ENTRYSIZE) //
+#define ROMXT_DHCP_STOP (50 * ROMXT_ENTRYSIZE) //
+#define ROMXT_DHCPNOTIFY (51 * ROMXT_ENTRYSIZE) // empty redirect stub, not implemented
+
+// TFTP functions
+#define ROMXT_TFTP_INIT (52 * ROMXT_ENTRYSIZE) //
+#define ROMXT_TFTP_FIRST (53 * ROMXT_ENTRYSIZE) //
+#define ROMXT_TFTP_NEXT (54 * ROMXT_ENTRYSIZE) //
+#define ROMXT_TFTP_MSG (55 * ROMXT_ENTRYSIZE) //
+
+// SCHEDULER functions
+#define ROMXT_TASK_GENESIS (56 * ROMXT_ENTRYSIZE) //
+#define ROMXT_TASK_GETCURRENT (57 * ROMXT_ENTRYSIZE) //
+#define ROMXT_TASK_GETPRIORITY (58 * ROMXT_ENTRYSIZE) //
+#define ROMXT_TASK_SETPRIORITY (59 * ROMXT_ENTRYSIZE) //
+#define ROMXT_TASK_FORK (60 * ROMXT_ENTRYSIZE) //
+#define ROMXT_TASK_KILL (61 * ROMXT_ENTRYSIZE) //
+#define ROMXT_TASK_SUSPEND (62 * ROMXT_ENTRYSIZE) //
+#define ROMXT_TASK_SLEEP (63 * ROMXT_ENTRYSIZE) //
+#define ROMXT_TASK_SIGNAL (64 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_TASK_SWITCH_IN (65 * ROMXT_ENTRYSIZE) // empty redirect stub, not implemented
+#define ROMXT_ROM_TASK_SWITCH_OUT (66 * ROMXT_ENTRYSIZE) // empty redirect stub, not implemented
+#define ROMXT_ENTERCRITSECTION (67 * ROMXT_ENTRYSIZE) //
+#define ROMXT_LEAVECRITSECTION (68 * ROMXT_ENTRYSIZE) //
+
+// INIT functions
+#define ROMXT_ROM_INIT (69 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_COPYIVT (70 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ROM_REDIRECT_INIT (71 * ROMXT_ENTRYSIZE) //
+#define ROMXT_MM_INIT (72 * ROMXT_ENTRYSIZE) //
+#define ROMXT_KM_INIT (73 * ROMXT_ENTRYSIZE) //
+#define ROMXT_OW_INIT (74 * ROMXT_ENTRYSIZE) //
+#define ROMXT_NETWORK_INIT (75 * ROMXT_ENTRYSIZE) //
+#define ROMXT_ETH_INIT (76 * ROMXT_ENTRYSIZE) //
+#define ROMXT_INIT_SOCKETS (77 * ROMXT_ENTRYSIZE) //
+#define ROMXT_TICK_INIT (78 * ROMXT_ENTRYSIZE) //
+
+// Timer Interrupt vectors
+#define ROMXT_WOS_TICK (79 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_BLOB (80 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+
+// Maintenance functions
+#define ROMXT_WOS_IOPOLL (81 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_IP_PROCESSRECEIVEQUEUES (82 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_IP_PROCESSOUTPUT (83 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_TCP_RETRYTOP (84 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_ETH_PROCESSOUTPUT (85 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_IGMP_GROUPMAINTAINENCE (86 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_IP6_PROCESSRECEIVEQUEUES (87 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_IP6_PROCESSOUTPUT (88 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_PARAMBUFFER (89 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_RAM_TOP (90 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_BOOT_MEMBEGIN (91 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_BOOT_MEMEND (92 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+
+// 1-Wire
+#define ROMXT_OWM_FIRST (93 * ROMXT_ENTRYSIZE) //
+#define ROMXT_OWM_NEXT (94 * ROMXT_ENTRYSIZE) //
+#define ROMXT_OWM_RESET (95 * ROMXT_ENTRYSIZE) //
+#define ROMXT_OWM_BYTE (96 * ROMXT_ENTRYSIZE) //
+#define ROMXT_OWM_SEARCH (97 * ROMXT_ENTRYSIZE) // not implemented for C compiler
+#define ROMXT_OW_ROMID (98 * ROMXT_ENTRYSIZE) //
+
+// Misc, extras, late additions
+#define ROMXT_AUTOBAUD (99 * ROMXT_ENTRYSIZE)
+#define ROMXT_TFTP_CLOSE (100 * ROMXT_ENTRYSIZE)
+
+#define GETC \
+ clr a \
+ movc a, @a+dptr
+
+
+// expects function number in R6_B3 (low byte) & R7_B3 (high byte)
+void _romcall(void) _naked
+{
+_asm
+ push dpx ; dptr0 preserved here
+ push dph
+ push dpl
+
+ ; point to the address of the table
+ mov dptr, #(ROM_BANK << 16 | ROM_EXPORTTABLE_OFFS)
+
+ push acc ; acc preserved here
+ push b ; b preserved here
+ inc dptr
+ GETC ; get the address of the table
+ push acc
+ inc dptr
+ GETC
+ add a, R6_B3 ; add function offset to the table
+ mov dpl, a
+ pop acc
+ addc a, R7_B3
+ mov dph, a
+
+ ;
+ ; dpx is the same, all in the same bank
+ ;
+ inc dptr ; get the target address of the function we want
+ GETC
+ mov b, a
+ inc dptr
+ GETC
+ mov R3_B3, a
+ mov R4_B3, b
+ mov R5_B3, dpx ; high byte does not change
+ pop b ; b restored here
+ pop acc ; acc restored here
+ pop dpl ; dptr0 preserved here
+ pop dph
+ pop dpx
+ push R3_B3 ; push the target address
+ push R4_B3
+ push R5_B3
+ ret ; this is not a ret, it is a call!
+
+ ; the called function ends with a ret which will return to our original caller.
+_endasm ;
+}
+
+// This macro is invalid for the standard C preprocessor, since it
+// includes a hash character in the expansion, hence the SDCC specific
+// pragma.
+#pragma sdcc_hash +
+#define ROMCALL(x) \
+ mov R6_B3, #(x & 0xff) \
+ mov R7_B3, #((x >> 8) & 0xff) \
+ lcall __romcall
+
+
+// rom_init: the ds400 ROM_INIT ROM function.
+unsigned char rom_init(void xdata *loMem,
+ void xdata *hiMem) _naked
+{
+ // shut compiler up about unused parameters.
+ loMem;
+ hiMem;
+
+_asm
+ ; load params.
+ ; loMem is already in DPTR.
+ mov r2, dpx
+ mov r1, dph
+ mov r0, dpl
+ ; hiMem is in _rom_init_PARM_2
+ mov dptr, #_rom_init_PARM_2
+ mov r5, dpx
+ mov r4, dph
+ mov r3, dpl
+
+ ROMCALL(ROMXT_ROM_INIT)
+
+ ; result is in acc, move to dpl for C convention.
+ mov dpl, a
+ ret
+_endasm ;
+}
+
+// all other ROM functions should go here, using rom_init as a template...
+
+// Various utility functions.
+
+// Return the start of the XI_SEG. Really just a workaround for the
+// fact that the linker defined symbol (s_XISEG) isn't directly accessible
+// from C due to the lack of a leading underscore, and I'm too lazy to hack
+// the linker.
+static void xdata *_xisegStart(void) _naked
+{
+_asm
+ mov dptr, #(s_XISEG)
+ ret
+_endasm;
+}
+
+// Return the length of the XI_SEG. Really just a workaround for the
+// fact that the linker defined symbol (l_XISEG) isn't directly accessible
+// from C due to the lack of a leading underscore, and I'm too lazy to hack
+// the linker.
+static unsigned _xisegLen(void) _naked
+{
+_asm
+ mov dptr, #(l_XISEG)
+ ret
+_endasm;
+}
+
+// Returns the address of the first byte available for heap memory,
+// i.e. the first byte following the XI_SEG.
+static void xdata *_firstHeapByte(void)
+{
+ unsigned char xdata *start;
+
+ start = (unsigned char xdata *) _xisegStart();
+ start += _xisegLen();
+
+ return (void xdata *)start;
+}
+
+// A simple wrapper for ROM_INIT which allocates all available RAM in the CE0 area
+// to the heap.
+
+// The last addressible byte of the CE0 area.
+#define CE0_END 0xfffff
+
+unsigned char romInit(unsigned char noisy)
+{
+ void xdata *heapStart;
+ void xdata *heapEnd;
+ unsigned long heapLen;
+ unsigned char rc;
+
+ heapStart = _firstHeapByte();
+ heapEnd = (void xdata *)CE0_END;
+
+ rc = rom_init(heapStart, heapEnd);
+
+ if (noisy)
+ {
+ if (rc)
+ {
+ printf("error: rom_init returns %d\n", (int)rc);
+ }
+ else
+ {
+ heapLen = CE0_END - (unsigned long)heapStart;
+ printf("Heap starts at %p, length %luK\n", heapStart, heapLen / 1024);
+ }
+ }
+ return rc;
+}
+
+// Install an interrupt handler.
+void installInterrupt(void (*isrPtr)(void), unsigned char offset)
+{
+ unsigned char xdata * vectPtr = (unsigned char xdata *) offset;
+ unsigned long isr = (unsigned long)isrPtr;
+
+ *vectPtr++ = 0x02;
+ *vectPtr++ = (unsigned char)(isr >> 16);
+ *vectPtr++ = (unsigned char)(isr >> 8);
+ *vectPtr = (unsigned char)isr;
+}
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