sim/m68hc11/ChangeLog

   1 2002-06-09  Andrew Cagney  <cagney@redhat.com>
   2
   3         * Makefile.in (INCLUDE): Update path to callback.h.
   4         * sim-main.h: Include "gdb/callback.h" and "gdb/remote-sim.h".
   5
   6 2002-03-07  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
   7
   8         * m68hc11_sim.c (cpu_move8): Call sim_engine_abort in default case.
   9         (cpu_move16): Likewise.
  10         (sim_memory_error): Use sim_io_printf.
  11         (cpu_option_handler): Fix compilation warning.
  12         * interp.c (sim_hw_configure): Fix compilation warning;
  13         remove m68hc12sio@2 device.
  14         (sim_open): Likewise.
  15         * dv-m68hc11tim.c (m68hc11tim_port_event): Fix clear of TFLG2
  16         flags when reset.
  17         (cycle_to_string): Improve convertion of cpu cycle number.
  18         (m68hc11tim_info): Print info about PACNT.
  19         (m68hc11tim_io_write_buffer): Fix clearing of TFLG2; handle
  20         TCTL1 and TCTL2 registers.
  21         * dv-m68hc11.c (m68hc11_info): Print 6811 current running mode.
  22
  23 2002-03-07  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
  24
  25         * interp.c (sim_hw_configure): Save the HW cpu pointer in the
  26         cpu struct.
  27         (sim_hw_configure): Connect the capture input/output events.
  28         * sim-main.h (_sim_cpu): New member hw_cpu.
  29         (m68hc11cpu_set_oscillator): Declare.
  30         (m68hc11cpu_clear_oscillator): Declare.
  31         (m68hc11cpu_set_port): Declare.
  32         * dv-m68hc11.c (m68hc11_options): New for oscillator commands.
  33         (m68hc11cpu_ports): New input ports and output ports to reflect
  34         the HC11 IOs.
  35         (m68hc11_delete): Cleanup any running oscillator.
  36         (attach_m68hc11_regs): Create the input oscillators.
  37         (make_oscillator): New function.
  38         (find_oscillator): New function.
  39         (oscillator_handler): New function.
  40         (reset_oscillators): New function.
  41         (m68hc11cpu_port_event): Handle the new input ports.
  42         (m68hc11cpu_set_oscillator): New function.
  43         (m68hc11cpu_clear_oscillator): New function.
  44         (get_frequency): New function.
  45         (m68hc11_option_handler): New function.
  46         (m68hc11cpu_set_port): New function.
  47         (m68hc11cpu_io_write): Post the port output events.
  48         * dv-m68hc11spi.c (set_bit_port): Use m68hc11cpu_set_port to set
  49         the output port value.
  50         * dv-m68hc11tim.c (m68hc11tim_port_event): Handle CAPTURE event
  51         by latching the TCNT value in the register.
  52
  53 2002-03-07  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
  54
  55         * sim-main.h (cpu_frame, cpu_frame_list): Remove.
  56         (cpu_frame_reg, cpu_print_frame): Remove.
  57         (cpu_m68hc11_push_uint8, cpu_m68hc11_pop_uint8): Cleanup.
  58         (cpu_m68hc11_push_uint16, cpu_m68hc11_pop_uint16): Likewise.
  59         (cpu_m68hc12_push_uint8, cpu_m68hc12_push_uint16): Likewise.
  60         (cpu_m68hc12_pop_uint8, cpu_m68hc12_pop_uint16): Likewise.
  61         * m68hc11_sim.c (cpu_find_frame): Remove.
  62         (cpu_create_frame_list): Remove.
  63         (cpu_remove_frame_list, cpu_create_frame, cpu_free_frame): Remove.
  64         (cpu_frame_reg, cpu_print_frame, cpu_update_frame): Remove.
  65         (cpu_call): Cleanup to remove #if HAVE_FRAME and calls to the above.
  66         (cpu_update_frame): Likewise.
  67         (cpu_return): Likewise.
  68         (cpu_reset): Likewise.
  69         (cpu_initialize): Likewise.
  70         * interp.c (sim_do_command): Remove call to cpu_print_frame.
  71
  72 2002-03-07  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
  73
  74         * interrupts.c (interrupts_reset): New function, setup interrupt
  75         vector address according to cpu mode.
  76         (interrupts_initialize): Move reset portion to the above.
  77         (interrupt_names): New table to give a name to interrupts.
  78         (idefs): Handle pulse accumulator interrupts.
  79         (interrupts_info): Print the interrupt history.
  80         (interrupt_option_handler): New function.
  81         (interrupt_options): New table of options.
  82         (interrupts_update_pending): Keep track of when interrupts are
  83         raised and implement breakpoint-on-raise-interrupt.
  84         (interrupts_process): Keep track of when interrupts are taken
  85         and implement breakpoint-on-interrupt.
  86         * interrupts.h (struct interrupt_history): Define.
  87         (struct interrupt): Keep track of the interrupt history.
  88         (interrupts_reset): Declare.
  89         (interrupts_initialize): Update prototype.
  90         * m68hc11_sim.c (cpu_reset): Reset interrupts.
  91         (cpu_initialize): Cleanup.
  92
  93 2001-07-28  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
  94
  95         * dv-m68hc11eepr.c (m68hc11eepr_info): Fix print of current write
  96         address.
  97         (m68hc11eepr_port_event): Fix detach/attach logic.
  98
  99 2001-07-22  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 100
 101         * Makefile.in (SIM_OBJS): Remove sim-resume.o
 102         * interp.c (sim_resume): New function from sim-resume.c, install
 103         the stepping event after having processed the pending ticks.
 104         (has_stepped): Likewise.
 105         (sim_info): Produce an output only if verbose or STATE_VERBOSE_P.
 106
 107 2001-07-10  Andrew Cagney  <ac131313@redhat.com>
 108
 109         * Makefile.in (gencode): Provide explicit path to gencode.c.
 110
 111 2001-05-20  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 112
 113         * Makefile.in (M68HC11_OBJS): Add m68hc12int.o.
 114         (m68hc12int.c): Generate using gencode -m6812.
 115         (m68hc11int.c): Likewise with -m6811.
 116
 117         * gencode.c (m6811_opcode_patterns): New patterns for 68HC12.
 118         (m6811_page1_opcodes): Remove duplicate entries.
 119         (m6811_page2_opcodes): Likewise.
 120         (m6811_page3_opcodes): Likewise.
 121         (m6811_page4_opcodes): Likewise.
 122         (m6812_page1_opcodes): New table for 68HC12 instructions.
 123         (m6812_page2_opcodes): Likewise.
 124         (gen_fetch_operands): New modes [] and &[] for 68HC12 operands.
 125         (gen_save_result): Likewise.
 126         (gen_interpreter_for_table): Handle 68HC11 and 68HC12 opcodes.
 127         (cmp_opcode): New function for opcode comparision.
 128         (prepare_table): Sort the opcodes.
 129         (gen_interpreter): Prepare all the tables and generate either
 130         a 68HC11 or a 68HC12 simulator.
 131         (main): New options -m6811 and -m6812.
 132
 133         * m68hc11_sim.c (cpu_single_step): Use pointer to cpu interpretor.
 134         (cpu_special): Simulation of some 68HC12 instructions.
 135         (cpu_exg): New function.
 136         (cpu_dbcc): Likewise.
 137         (cpu_fetch_relbranch16): Likewise.
 138         (cpu_push_all): Push according to 68HC11 or 68HC12.
 139         (cpu_move16): Likewise.
 140         (cpu_move8): Likewise.
 141         (cpu_get_indexed_operand16): Likewise.
 142         (cpu_get_indexed_operand8): Likewise.
 143         (cpu_get_indexed_operand_addr): Likewise.
 144         (cpu_set_reg, cpu_set_dst_reg, cpu_get_src_reg, cpu_get_reg): Likewise.
 145         (cpu_reset): Setup INIT register according to architecture.
 146
 147         * sim-main.h (M6811_Special): Add 68HC12 specific instructions.
 148         (_sim_cpu): Keep track of the cpu being simulated.
 149         (cpu_get_tmp3, cpu_get_tmp2, cpu_set_tmp3, cpu_set_tmp2): New.
 150         (cpu_m68hc11_push_uintxx): Rename of cpu_push_uintxx.
 151         (cpu_m68hc11_pop_uint8): Likewise.
 152         (cpu_m68hc12_push_uintxx): New functions for 68HC12.
 153         (cpu_m68hc12_pop_uintxx): Likewise.
 154         (cpu_exg, cpu_dbcc, cpu_move8, cpu_move16): Likewise,
 155         (cpu_fetch_relbranch16): Likewise.
 156         (cpu_interp_m6811): Rename of cpu_interp.
 157         (cpu_interp_m6812): New function.
 158         * interp.c (free_state): New function.
 159         (dev_list_68hc12): New table.
 160         (sim_board_reset): Reset depending on the cpu (HC11 or HC12).
 161         (sim_hw_configure): New function.
 162         (sim_prepare_for_program): New function.
 163         (sim_open): Use above new functions.
 164         (sim_close): Call free_state().
 165         (sim_info): Print info according to cpu.
 166         (sim_create_inferior): Use sim_prepare_for_program.
 167         (sim_do_command): Configure the hardware after a change of the
 168         architecture.
 169
 170 2001-05-20  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 171
 172         * dv-m68hc11sio.c (m68hc11sio_tx_poll): Always check for
 173         pending interrupts.
 174         * interrupts.c (interrupts_process): Keep track of the last number
 175         of masked insn cycles.
 176         (interrupts_initialize): Clear last number of masked insn cycles.
 177         (interrupts_info): Report them.
 178         (interrupts_update_pending): Compute clear and set masks of
 179         interrupts and clear the interrupt bits before setting them
 180         (due to SCI interrupt sharing).
 181         * interrupts.h (struct interrupts): New members last_mask_cycles
 182         and xirq_last_mask_cycles.
 183
 184 2000-11-26  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 185
 186         * dv-m68hc11.c (m68hc11cpu_io_read_buffer): Use attach_size
 187         instead of a hard-coded value.
 188         (m68hc11cpu_io_write_buffer): Likewise.
 189         (dv_m68hc11_descriptor): Define a 68hc12 device.
 190         * dv-m68hc11eepr.c (dv_m68hc11eepr_descriptor): Likewise.
 191         * dv-m68hc11tim.c (dv_m68hc11tim_descriptor): Likewise.
 192         * dv-m68hc11spi.c (dv_m68hc11spi_descriptor): Likewise.
 193         * dv-m68hc11sio.c (dv_m68hc11sio_descriptor): Likewise.
 194
 195 2000-11-22  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 196
 197         * dv-m68hc11.c (attach_m68hc11_regs): Register a delete handler.
 198         (m68hc11cpu_delete): Delete handler to detach the address space.
 199
 200 2000-11-24  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 201
 202         * dv-m68hc11eepr.c (attach_m68hc11eepr_regs): Use hw_malloc.
 203         * dv-nvram.c (attach_nvram_regs): Use hw_free and hw_malloc
 204         instead of free and malloc.
 205
 206 2000-09-11  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 207
 208         * Makefile.in: Was missing from initial patch.
 209
 210 2000-09-10  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 211
 212         * interp.c (sim_store_register): Remove soft register hack.
 213         (sim_fetch_register): Likewise.
 214         (sim_create_inferior): Likewise.
 215         * sim-main.h: Likewise.
 216
 217 2000-09-10  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 218
 219         * interrupts.c (interrupts_update_pending): Clear the mask of
 220         pending interrupts here.
 221         (interrupts_get_current): Don't clear the mask of pending interrupts.
 222
 223 2000-09-10  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 224
 225         * sim-main.h: Define cycle_to_string.
 226         * dv-m68hc11tim.c (cycle_to_string): New function to translate
 227         the cpu cycle into some formatted time string.
 228         (m68hc11tim_print_timer): Use it.
 229         * dv-m68hc11sio.c (m68hc11sio_info): Use cycle_to_string.
 230         * dv-m68hc11spi.c (m68hc11spi_info): Likewise.
 231         * interrupts.c (interrupts_info): Likewise.
 232         * m68hc11_sim.c (cpu_info): Likewise.
 233
 234 2000-09-06  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 235
 236         * dv-m68hc11tim.c (m68hc11tim_timer_event): Compute the overflow
 237         interrupt and compare events accurately.  Take into account the
 238         pending ticks not processed by the simulator yet (introduced a shift).
 239         (m68hc11_port_event): Reset the timer interrupt delays.
 240         (m68hc11tim_io_read_buffer): Be able to read several bytes.
 241         (m68hc11tim_io_write_buffer): Likewise for write.
 242         (m68hc11tim_io_write_buffer): Recompute the timer overflow interrupt.
 243
 244 2000-09-06  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 245
 246         * dv-m68hc11spi.c (m68hc11spi_io_read_buffer): Clear the interrupts.
 247         (m68hc11spi_io_write_buffer): Likewise and fix the spi frame.
 248         (m68hc11spi_info): Clarify the status report
 249         of the SPI when a byte is being sent.
 250         (m68hc11spi_clock): Fix the spi send frame.
 251
 252 2000-08-11  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 253
 254         * sim-main.h (m68hc11_map_level): Define level of address mappings.
 255         * dv-m68hc11eepr.c (struct m68hc11eepr ): New flag to indicate
 256         whether the eeprom is currently mapped or not.
 257         (m68hc11eepr_port_event): Use the flag to see if we must unmap
 258         or map the eeprom.  Update the flag to reflect the current state.
 259         Use M6811_EEPROM_LEVEL when mapping the eeprom.
 260         (m68hc11eepr_finish): Remove overlap hack.
 261         (attach_m68hc11eepr_regs): Use M6811_IO_LEVEL when mapping the
 262         config and control registers.
 263         * dv-m68hc11.c (m68hc11cpu_finish): Remove overlap hack.
 264         (attach_m68hc11_regs): Use M6811_IO_LEVEL.
 265         (m68hc11cpu_io_write): Likewise when unmapping and re-mapping.
 266         * dv-m68hc11spi.c (m68hc11spi_finish): Likewise.
 267         (attach_m68hc11spi_regs): Likewise.
 268         * dv-m68hc11tim.c (m68hc11tim_finish): Likewise.
 269         (attach_m68hc11tim_regs): Likewise.
 270         * dv-m68hc11sio.c (m68hc11sio_finish): Likewise.
 271         (attach_m68hc11sio_regs): Likewise.
 272         * interp.c (sim_open): Likewise.
 273         * dv-nvram.c (attach_nvram_regs): Likewise.
 274
 275 Thu Jul 27 21:27:25 2000  Andrew Cagney  <cagney@b1.cygnus.com>
 276
 277         * configure, config.in: Regenerate.
 278
 279 2000-06-25  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 280
 281         * Makefile.in (SIM_RUN_OBJS): Define to use nrun.c
 282         * dv-m68hc11.c (m68hc11cpu_finish): Register detach address callback.
 283         (dv_m6811_detach_address_callback): New function to detach a
 284         device from an address space.
 285         * dv-m68hc11eepr.c (m68hc11eepr_port_event): Initialize
 286         config register according to --cpu-config option.
 287         * sim-main.h (_sim_cpu): Add cpu_config member.
 288         * interp.c (sim_open): Delete specific simulator options.
 289         * m68hc11_sim.c (cpu_option_handler): New options
 290         --emulos and -cpu-config <val> to configure the simulator.
 291         (cpu_initialize): Initialize cpu_config member.
 292
 293 2000-06-24  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 294
 295         * emulos.c: Fix indentation and comments.
 296         * gencode.c: Likewise.
 297         * dv-m68hc11tim.c (m68hc11tim_timer_event): Handle COMPARE_EVENT.
 298         (m68hc11tim_io_write_buffer): Write compare registers and
 299         setup compare event.
 300         * interp.c: Remove unused global variables.
 301         * interrupts.c (idefs): New compare interrupts.
 302         Fix indentation and comments.
 303         * interrupts.h: Likewise.
 304
 305 2000-06-18  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 306
 307         * dv-m68hc11sio.c: Fix indentation and comments.
 308         Remove INT_PORT.
 309         * dv-m68hc11.c: Fix indentation and comments.
 310         (m68hc11cpu_port_event): Move initialization of M6811_HPRIO from here.
 311         * m68hc11_sim.c (cpu_reset): To here.
 312         * dv-m68hc11eepr.c: Fix indentation and comments.
 313
 314 2000-06-17  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 315
 316         * dv-nvram.c: New file, rename from dv-pram.c.
 317         * dv-pram.c: Delete file.
 318         * sim-main.h: Incorporate m68hc11_sim.h.
 319         * m68hc11_sim.h: Delete file.
 320         * configure.in: Rename pram into nvram.
 321         * interp.c (sim_open): Likewise in creation of device tree.
 322
 323 2000-05-31  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 324
 325         * interp.c (sim_open): Create the SPI device.
 326         * dv-m68hc11spi.c: New file for SPI device simulation.
 327         * configure.in (hw_extra_devices): Add SPI device.
 328
 329 2000-05-28  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
 330
 331         * interrupts.c (interrupts_initialize): Clear XIRQ accounting.
 332         (interrupts_process): Separate IRQ and XIRQ accounting.
 333         (interrupts_info): Report XIRQ accounting.
 334         * interrupts.h (struct interrupts): Added accounting for XIRQ.
 335
 336 2000-04-16  Stephane Carrez  <stcarrez@worldnet.fr>
 337
 338         * dv-pram.c (attach_pram_regs): Fix the 'save-modified' mode.
 339         * m68hc11_sim.h (_sim_cpu): Allow configuration of cpu mode.
 340         * dv-m68hc11.c (attach_m68hc11_regs): Get the cpu MODA,MODB
 341         configuration from the 'mode' device tree property.
 342         (m68hc11cpu_port_event): Reset M6811_HPRIO to the cpu MODA, MODB
 343         configuration.
 344
 345 2000-02-24  Stephane Carrez  <stcarrez@worldnet.fr>
 346
 347         * sim-main.h: Remove WITH_TARGET_* defines.
 348         * Makefile.in (SIM_EXTRA_CFLAGS): Specify the WITH_TARGET_* flags.
 349
 350 2000-02-08  Stephane Carrez  <stcarrez@worldnet.fr>
 351
 352         * dv-m68hc11sio.c (m68hc11sio_port_event): Setup the SCI to
 353         1200 baud when cpu is in bootstrap mode.
 354
 355         * dv-m68hc11tim.c (m68hc11tim_io_write_buffer): Be able to
 356         write in the TCTN timer register.
 357
 358         * dv-m68hc11sio.c (m68hc11sio_io_write_buffer): Divide cpu clock
 359         by 4 to obtain the E clock frequency.
 360         (sccr2_desc): Use M6811_TIE for TIE bit.
 361         (m68hc11sio_info): Fix baud rate report.
 362
 363         * dv-m68hc11tim.c (to_realtime): Likewise.
 364
 365         * interp.c (sim_open): When building device tree, only provide
 366         devices that do not exist yet.
 367
 368         * emulos.c: Fix compilation pb under Windows.
 369
 370         * dv-m68hc11.c (attach_m68hc11_regs): Get the clock frequency
 371         from the 'clock' property.
 372
 373 2000-01-02  Stephane Carrez  <stcarrez@worldnet.fr>
 374
 375         * m68hc11_sim.h (*_REGNUM): Define.
 376         (_sim_cpu): New member cpu_page0_reg table.
 377         * interp.c (sim_create_inferior): Fill the cpu_page0_reg table with
 378         addresses of soft registers in .page0.
 379         (sim_fetch_register, sim_store_register): Use cpu_page0_reg table
 380         to get/set soft registers.
 381
 382 1999-12-31  Stephane Carrez  <stcarrez@worldnet.fr>
 383
 384         * dv-m68hc11.c (m68hc11cpu_io_write_buffer): Clear byte to avoid
 385         returning random values.
 386
 387 1999-12-17  Stephane Carrez  <stcarrez@worldnet.fr>
 388
 389         * gencode.c: Fix "subb N,x" that used a instead of b.
 390
 391 1999-09-09  Stephane Carrez  <stcarrez@worldnet.fr>
 392
 393         * gencode.c: Fixed sbc8 and adc8 when there was a initial carry.
 394
 395 1999-09-01  Stephane Carrez  <stcarrez@worldnet.fr>
 396
 397         * sim-main.h (SIM_HANDLES_LMA): Define to enable loading using lma.
 398
 399 1999-08-14  Stephane Carrez  <stcarrez@worldnet.fr>
 400
 401         * dv-m68hc11.c (attach_m68hc11_regs): Save the size of the
 402         register region in the m68hc11cpu struct.
 403         (m68hc11cpu_io_write): When the IO mapping addres changes,
 404         detach the register region and re-attach it at the new address.
 405         (m68hc11cpu_io_read_buffer): Renamed base_address into
 406         attach_address.
 407         (m68hc11cpu_io_write_buffer): Likewise. Pass the hw pointer
 408         to m68hc11cpu_io_write.
 409
 410 1999-08-13  Stephane Carrez  <stcarrez@worldnet.fr>
 411
 412         * gencode.c: For sbc8, check the carry and increment the source
 413         before trying to set the carry for the result.
 414
 415 1999-05-24  John S. Kallal <kallal@voicenet.com>
 416
 417         * interp.c (sim_get_info): Don't crash if the command line is 0.
 418         Define prototype for sim_get_info() and init_system().
 419         (sim_info): Correct call to sim_get_info().
 420
 421 1999-05-16  Stephane Carrez  <stcarrez@worldnet.fr>
 422
 423         * configure.in: Recognize m6811-*-*.
 424         * configure: Regenerate.
 425         * m68hc11_sim.h (cpu_ccr_update_add8, cpu_ccr_update_add16,
 426         cpu_ccr_update_sub8, cpu_ccr_update_sub16):
 427         Correct the computation of carry of 8 and 16-bits add and subtract.
 428         * gencode.c: Use cpu_ccr_update_sub8 for subtraction (carry and
 429         overflow set in a different manner than add).
 430
 431 1999-05-14  Stephane Carrez  <stcarrez@worldnet.fr>
 432
 433         * dv-m68hc11.c (dv_m6811_attach_address_callback): Removed a
 434         trace message.
 435         * interp.c (sim_open, sim_create_inferior): Initialize the
 436         cpu_elf_start from the ELF header.
 437         * m68hc11_sim.c (cpu_initialize): Clear the new data members.
 438         (cpu_restart): Use cpu_elf_start as the starting address when
 439         the flag is set.
 440         (cpu_special): When cpu_use_elf_start is set, the WAI instruction
 441         exits the simulator (exit status is in D).
 442         * m68hc11_sim.h (_sim_cpu): Added members cpu_use_elf_start and
 443         cpu_elf_star to start execution at address specified in ELF file.
 444
 445 1999-05-02  Stephane Carrez  <stcarrez@worldnet.fr>
 446
 447         * Makefile.in, config.in, configure, configure.in: New files.
 448         * gencode.c: New file, generation of 68HC11 interpreter.
 449         * m68hc11_sim.h, m68hc11_sim.c: New files, specific operations
 450         for interpreter.
 451         * interrupts.c, interrupts.h: New files, management of interrupts.
 452         * interp.c, sim-main.h,
 453         * dv-m68hc11.c, dv-m68hc11eepr.c, dv-m68hc11sio.c,
 454         dv-m68hc11tim.c, dv-pram.c: New files representing devices for
 455         68HC11 (dv-pram.c is generic and could probably migrate to common).
 456         * emulos.c: New file, basic emulation of some os.