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VAX750: Added VAX. 11.750 Boot ROM booting options

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VAX 11/.750 Boot ROM code makes non-longword memory references to MassBus and Unibus register space.  Minor changes were necessary to allow this behavior which was architecturally undefined behavior, but had real code which depended on it.

Added a BOOTDEV option to the CPU to reflect the 4 position boot device selection switch on real VAX 11/750 hardware.

The UBA750 initial state started with the UBA map registers validly mapping the first 256KB of RAM to Unibus space.

Added simulated PCS/WCS memory which boot code on some operating systems (Ultrix and other BSD derived systems) automatically loaded on the VAX 11/750.  PCS/WCS was also automatically loaded by the newer versions of the BOOT ROMs.
This commit is contained in:
Mark Pizzolato
2015-09-10 21:42:16 -07:00
parent 176540f639
commit 4baecec0b1
18 changed files with 454 additions and 103 deletions
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13
sim_BuildROMs.c
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@@ -38,11 +38,13 @@
=======================================================================================
*/
struct ROM_File_Descriptor {
const char *BinaryName; const char *IncludeFileName; size_t expected_size; unsigned int checksum; const char *ArrayName;} ROMs[] = {
const char *BinaryName; const char *IncludeFileName; size_t expected_size; unsigned int checksum; const char *ArrayName; const char *Comments;} ROMs[] = {
{"VAX/ka655x.bin", "VAX/vax_ka655x_bin.h", 131072, 0xFF7673B6, "vax_ka655x_bin"},
{"VAX/ka620.bin", "VAX/vax_ka620_bin.h", 65536, 0xFF7F930F, "vax_ka620_bin"},
{"VAX/ka630.bin", "VAX/vax_ka630_bin.h", 65536, 0xFF7F73EF, "vax_ka630_bin"},
{"VAX/ka610.bin", "VAX/vax_ka610_bin.h", 16384, 0xFFEF3312, "vax_ka610_bin"},
{"VAX/ka750_new.bin", "VAX/vax_ka750_bin_new.h", 1024, 0xFFFE7BE5, "vax_ka750_bin_new", "From ROM set: E40A9, E41A9, E42A9, E43A9 (Boots: A=DD, B=DB, C=DU"},
{"VAX/ka750_old.bin", "VAX/vax_ka750_bin_old.h", 1024, 0xFFFEBAA5, "vax_ka750_bin_old", "From ROM set: 990A9, 948A9, 906A9, 905A9 (Boots: A=DD, B=DM, C=DL, D=DU"},
{"VAX/vmb.exe", "VAX/vax_vmb_exe.h", 44544, 0xFFC014BB, "vax_vmb_exe"},
{"swtp6800/swtp6800/swtbug.bin", "swtp6800/swtp6800/swtp_swtbug_bin.h", 1024, 0xFFFE4FBC, "swtp_swtbug_bin"},
};
@@ -196,7 +198,8 @@ int sim_make_ROM_include(const char *rom_filename,
int expected_size,
unsigned int expected_checksum,
const char *include_filename,
const char *rom_array_name)
const char *rom_array_name,
const char *Comments)
{
FILE *rFile;
FILE *iFile;
@@ -307,6 +310,8 @@ fprintf (iFile, " %s produced at %s", include_filename, ctime(&now));
fprintf (iFile, " from %s which was last modified at %s", rom_filename, ctime(&statb.st_mtime));
fprintf (iFile, " file size: %d (0x%X) - checksum: 0x%08X\n", (int)statb.st_size, (int)statb.st_size, checksum);
fprintf (iFile, " This file is a generated file and should NOT be edited or changed by hand.\n");
if (Comments)
fprintf (iFile, "\n %s\n\n", Comments);
fprintf (iFile, "*/\n");
fprintf (iFile, "#define BOOT_CODE_SIZE 0x%X\n", (int)statb.st_size);
fprintf (iFile, "#define BOOT_CODE_FILENAME \"%s\"\n", load_filename);
@@ -371,7 +376,7 @@ int status = 0;
if (argc == 1) { /* invoked without any arguments */
for (i=0; i<sizeof(ROMs)/sizeof(ROMs[0]); ++i)
status += sim_make_ROM_include (ROMs[i].BinaryName, ROMs[i].expected_size, ROMs[i].checksum, ROMs[i].IncludeFileName, ROMs[i].ArrayName);
status += sim_make_ROM_include (ROMs[i].BinaryName, ROMs[i].expected_size, ROMs[i].checksum, ROMs[i].IncludeFileName, ROMs[i].ArrayName, ROMs[i].Comments);
exit((status == 0) ? 0 : 2);
}
if ((0 == strcmp(argv[1], "/?")) ||
@@ -388,7 +393,7 @@ else {
if (i == sizeof(ROMs)/sizeof(ROMs[0]))
status = sim_make_ROMs_entry (argv[1]);
else
status = sim_make_ROM_include (ROMs[i].BinaryName, ROMs[i].expected_size, ROMs[i].checksum, ROMs[i].IncludeFileName, ROMs[i].ArrayName);
status = sim_make_ROM_include (ROMs[i].BinaryName, ROMs[i].expected_size, ROMs[i].checksum, ROMs[i].IncludeFileName, ROMs[i].ArrayName, ROMs[i].Comments);
}
exit((status == 0) ? 0 : 2);
}