avr/config.inc

   1 ;    Configuration, hardware definition, ...
   2 ;
   3 ;    Copyright (C) 2010 Sprite_tm
   4 ;    Copyright (C) 2010 Leo C.
   5 ;
   6 ;    This file is part of avrcpm.
   7 ;
   8 ;    avrcpm is free software: you can redistribute it and/or modify it
   9 ;    under the terms of the GNU General Public License as published by
  10 ;    the Free Software Foundation, either version 3 of the License, or
  11 ;    (at your option) any later version.
  12 ;
  13 ;    avrcpm is distributed in the hope that it will be useful,
  14 ;    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 ;    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 ;    GNU General Public License for more details.
  17 ;
  18 ;    You should have received a copy of the GNU General Public License
  19 ;    along with avrcpm.  If not, see <http://www.gnu.org/licenses/>.
  20 ;
  21 ;    $Id$
  22 ;
  23
  24
  25 #define VMAJOR 3                /* Version number */
  26 #define VMINOR 0
  27
  28 #ifndef DRAM_8BIT
  29   #define DRAM_8BIT 1           /* 1 = 8bit wide DRAM */
  30 #endif
  31 #ifndef F_CPU
  32   #define F_CPU  20000000       /* system clock in Hz; defaults to 20MHz */
  33 #endif
  34 #ifndef BAUD
  35   #define BAUD   38400          /* console baud rate */
  36 #endif
  37
  38 #define K 1024
  39 #define M 1024*K
  40
  41 ;#define RAMSIZE 256*K*4        /* 1 chip 256Kx4 */
  42 #define  RAMSIZE   4*M*4 * 2    /* 2 chips 4Mx4  */
  43
  44 #define EM_Z80  1               /* Emulate Z80 if true */
  45
  46 #ifndef FAT16_SUPPORT
  47   #define FAT16_SUPPORT 1       /* Include Support for FAT16 Partitions */
  48 #endif                          /*  which may contain CP/M image files. */
  49 #define RAMDISKCNT    4         /* Number of RAM disks */
  50 #define RAMDISKNR     'I'-'A'   /* Drive "letter" for first RAM disk */
  51
  52 #define PARTID 0x52             /* Partition table id */
  53                                 /* http://www.win.tue.nl/~aeb/partitions/partition_types-1.html */
  54 #define IPLADDR 0x2000          /* Bootloader load address */
  55
  56 #define DRAM_WAITSTATES 1       /* Number of additional clock cycles for dram read access */
  57 #define REFR_RATE   64000       /* dram refresh rate in cycles/s. */
  58                                 /* Most drams need 1/15.6µs. */
  59 #define RXBUFSIZE 128           /* USART recieve buffer size. Must be power of 2 */
  60 #define TXBUFSIZE 128           /* USART transmit buffer size. Must be power of 2 */
  61
  62
  63 #if EM_Z80
  64   #define CPUSTR "Z80"
  65 #else
  66   #define CPUSTR "8080"
  67 #endif
  68
  69 .equ BOOTWAIT      = 1
  70 .equ MEMTEST       = 1
  71 .equ MEMFILL       = 1
  72 .equ MMC_DEBUG     = 0          /* Increase for more debugging */
  73 .equ FAT16_DEBUG   = 0
  74 .equ FAT16_RWDEBUG = 0
  75 .equ FAT16_DBG_FAT = 0
  76 .equ DISK_DEBUG    = 0          /* Increase for more debugging */
  77 .equ HOSTRW_DEBUG  = 0
  78 .equ HEAP_DEBUG    = 0
  79 .equ PORT_DEBUG    = 0
  80 .equ INS_DEBUG     = 0
  81 .equ STACK_DBG     = 0
  82 .equ PRINT_PC      = 0
  83
  84 #define MMC_SPI2X  1            /* 0 = SPI CLK/4, 1 = SPI CLK/2 */
  85
  86 #define MEMFILL_VAL      0x76   /* Fill ram with HALT opcode. */
  87 #define DBG_TRACE_BOTTOM 0x01   /* Page boundaries for INS_DEBUG and PRINT_PC  */
  88 #define DBG_TRACE_TOP    0xdc   /* Trace is off, below bottom page and above top page. */
  89
  90 ;-----------------------------------------------------------------------
  91 ; Port declarations
  92
  93 #if DRAM_8BIT   /* Implies software uart */
  94
  95 ;Port D
  96 .equ RAM_D0     = 0
  97 .equ RAM_D1     = 1
  98 .equ RAM_D2     = 2
  99 .equ RAM_D3     = 3
 100 .equ RAM_D4     = 4
 101 .equ RAM_D5     = 5
 102 .equ RAM_D6     = 6
 103 .equ RAM_D7     = 7
 104 .equ RAM_A0     = 0
 105 .equ RAM_A1     = 1
 106 .equ RAM_A2     = 2
 107 .equ RAM_A3     = 3
 108 .equ RAM_A4     = 4
 109 .equ RAM_A5     = 5
 110 .equ RAM_A6     = 6
 111 .equ RAM_A7     = 7
 112
 113 ;Port B
 114 .equ MMC_MOSI   = 3
 115 .equ MMC_MISO   = 4
 116 .equ MMC_SCK    = 5
 117 .equ RAM_A8     = 3
 118 .equ RAM_A9     = 4
 119 .equ RAM_A10    = 5
 120
 121 .equ RXD        = 0
 122 .equ TXD        = 1
 123 .equ MMC_CS     = 2
 124
 125 .equ P_MMC_CS   = PORTB
 126 .equ P_A8       = PORTB
 127 .equ P_RXD      = PORTB
 128
 129 ;Port C
 130 .equ RAM_RAS    = 0
 131 .equ RAM_CAS    = 1
 132 .equ RAM_OE     = 2
 133 .equ RAM_W      = 3
 134
 135 .equ P_RAS      = PORTC
 136 .equ P_CAS      = PORTC
 137 .equ P_OE       = PORTC
 138 .equ P_W        = PORTC
 139
 140
 141 #else   /* 4 bit RAM, hardware uart */
 142
 143 ; Port D
 144 .equ RXD        = 0
 145 .equ TXD        = 1
 146 .equ RAM_OE     = 2
 147 .equ RAM_A8     = 3
 148 .equ MMC_CS     = 4
 149 .equ RAM_A5     = 5
 150 .equ RAM_A6     = 6
 151 .equ RAM_A7     = 7
 152
 153 .equ P_RXD      = PORTD
 154 .equ P_OE       = PORTD
 155 .equ P_A8       = PORTD
 156 .equ P_MMC_CS   = PORTD
 157 .equ P_AH       = PORTD
 158                      ; RAM_A[7..5]
 159 .equ RAM_AH_MASK = (1<<RAM_A8)|(1<<RAM_A7)|(1<<RAM_A6)|(1<<RAM_A5)
 160 .equ PD_OUTPUT_MASK = (1<<MMC_CS) | (1<<RAM_OE) | RAM_AH_MASK
 161
 162
 163 ;Port B
 164 .equ RAM_A4     = 0
 165 .equ RAM_A3     = 1
 166 .equ RAM_A2     = 2
 167 .equ RAM_A1     = 3
 168 .equ MMC_MOSI   = 3
 169 .equ RAM_A0     = 4
 170 .equ MMC_MISO   = 4
 171 .equ RAM_RAS    = 5
 172 .equ MMC_SCK    = 5
 173
 174 .equ P_RAS      = PORTB
 175 .equ P_AL       = PORTB
 176                         ; RAM_A[4..0]
 177 .equ RAM_AL_MASK = (1<<RAM_A4)|(1<<RAM_A3)|(1<<RAM_A2)|(1<<RAM_A1)|(1<<RAM_A0)
 178 .equ PB_OUTPUT_MASK = (1<<RAM_ras) | RAM_AL_MASK
 179
 180 ;Port C
 181 .equ RAM_D0     = 0
 182 .equ RAM_D1     = 1
 183 .equ RAM_D2     = 2
 184 .equ RAM_D3     = 3
 185 .equ RAM_W      = 4
 186 .equ RAM_CAS    = 5
 187
 188 .equ P_DQ       = PORTC
 189 .equ P_W        = PORTC
 190 .equ P_CAS      = PORTC
 191
 192 .equ RAM_DQ_MASK = (1<<RAM_D3)|(1<<RAM_D2)|(1<<RAM_D1)|(1<<RAM_D0)
 193 .equ PC_OUTPUT_MASK = (1<<RAM_CAS)|(1<<RAM_W)
 194
 195 #endif  /* DRAM_8BIT */
 196
 197
 198 ;-----------------------------------------------------------------------
 199 ;Register definitions
 200
 201 .def    _tmp0   = r0
 202 .def    _tmp1   = r1
 203
 204 .def    _RAS0   = r2
 205 .def    _CAS0   = r3
 206 .def    _OE     = r4
 207 .def    _WE     = r5
 208 .def    _255    = r6
 209 .def    _0      = r7
 210 .def    z_a     = r9
 211 ;.def   stx_bitcount  = r9
 212 ;.def   stx_dr        = r10
 213
 214 .def    srx_lastedgel = r10
 215 .def    srx_lastedgeh = r11
 216 ;.def   insstore= r8    ;
 217 ;.def   insop   = r13   ;
 218
 219 .def    insdecl = r12   ;
 220 .def    insdech = r13   ;
 221 .def    z_spl   = r14
 222 .def    z_sph   = r15   ;
 223 .def    temp    = r16   ;
 224 .def    temp2   = r17   ;
 225 .def    temp3   = r18
 226 .def    temp4   = r19
 227 .def    z_flags = r20   ;
 228 .def    intstat = r21   ; interpreter status / interrupt status
 229 .def    opl     = r22   ;
 230 .def    oph     = r23   ;
 231 .def    z_pcl   = r24   ;
 232 .def    z_pch   = r25   ;
 233 ; xl            ;r26
 234 ; xh            ;r27
 235 ; yl            ;r28
 236 ; yh            ;r29
 237 ; zl            ;r30    ;
 238 ; zh            ;r31    ;
 239
 240
 241 .equ    i_break = 0                     ;break detected flag
 242 .equ    i_trace = 1                     ;cpu interpreter trace flag
 243 .equ    i_halt  = 2                     ;executing halt instruction
 244
 245 #if defined __ATmega8__
 246 .equ    flags   = TWBR
 247 .equ    P_PUD   = SFIOR
 248 #else
 249 .equ    flags   = GPIOR0
 250 .equ    P_PUD   = MCUCR
 251 #endif
 252
 253 ; Flags:
 254         .equ    hostact = 7             ;host active flag
 255         .equ    hostwrt = 6             ;host written flag
 256         .equ    rsflag  = 5             ;read sector flag
 257         .equ    readop  = 4             ;1 if read operation
 258
 259         .equ    prefixfd = 1            ;Opcode prefix DD=0, FD=1
 260         .equ    trace    = 0
 261
 262 ; This is the base z80 port address for clock access
 263 #define TIMERPORT   0x40
 264 #define TIMER_CTL   TIMERPORT
 265 #define TIMER_MSECS TIMERPORT+1
 266 #define TIMER_SECS  TIMER_MSECS+2
 267
 268 #define starttimercmd   1
 269 #define quitTimerCmd    2
 270 #define printTimerCmd   15
 271 #define uptimeCmd       16
 272
 273 #define DEBUGPORT   0x4F
 274
 275 #define startTraceCmd 1
 276 #define stopTraceCmd  0
 277
 278
 279 #if defined __ATmega8__
 280 .equ    RXTXDR0 = UDR
 281 .equ    UCSR0A  = UCSRA
 282 .equ     UDRE0  = UDRE
 283 .equ    UCSR0B  = UCSRB
 284 .equ     RXCIE0 = RXCIE
 285 .equ     UDRIE0 = UDRIE
 286 .equ     RXEN0  = RXEN
 287 .equ     TXEN0  = TXEN
 288 .equ    UCSR0C  = UCSRC
 289 .equ     UCSZ00 = UCSZ0
 290 .equ     UCSZ01 = UCSZ1
 291 .equ    UBRR0H  = UBRRH
 292 .equ    UBRR0L  = UBRRL
 293 .equ    OCR2A   = OCR2
 294 .equ    OC2Aaddr= OC2addr
 295 .equ    TCCR2A  = TCCR2
 296 .equ    TCCR2B  = TCCR2
 297 .equ    TIMSK1  = TIMSK
 298 .equ    TIMSK2  = TIMSK
 299 .equ    OCIE2A  = OCIE2
 300 .equ    TIFR1   = TIFR
 301 .equ    ICIE1   = TICIE1
 302 #else
 303 .equ    RXTXDR0 = UDR0
 304 #endif
 305
 306 ; vim:set ts=8 noet nowrap
 307
 308