cpm/CFGACPM.LIB

   1 ;    Configuration and common defs for avrcpm BIOS and IPL
   2
   3 ;    Copyright (C) 2010 Leo C.
   4 ;
   5 ;    This program is free software: you can redistribute it and/or modify
   6 ;    it under the terms of the GNU General Public License as published by
   7 ;    the Free Software Foundation, either version 3 of the License, or
   8 ;    (at your option) any later version.
   9 ;
  10 ;    This program is distributed in the hope that it will be useful,
  11 ;    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 ;    GNU General Public License for more details.
  14 ;
  15 ;    You should have received a copy of the GNU General Public License
  16 ;    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 ;
  18 ;    $Id:$
  19 ;
  20
  21 msize   equ     62      ;size of available RAM in k
  22
  23 bias    equ     (msize-20) * 1024
  24 ccp     equ     3400h+bias      ;base of cpm ccp
  25 bdos    equ     ccp+806h        ;base of bdos
  26 bios    equ     ccp+1600h       ;base of bios
  27 cdisk   equ     0004h           ;current disk number (0 ... 15)
  28 iobyte  equ     0003h           ;intel iobyte
  29 buff    equ     0080h           ;default buffer address
  30 retry   equ     3               ;max retries on disk i/o before error
  31
  32
  33 ;copy from avr/virt_ports.asm:
  34 ;   Port        Direction  Function
  35 ;hex    dez
  36 ;-------------------------------------------------------------------------
  37 ;00     0       in      - Con status.
  38 ;                         Returns 0xFF if the UART has a byte, 0 otherwise.
  39 ;01     1       in/out  - Console input, aka UDR. / Console Output
  40 ;02     2       out     - Console Output (deprecated)
  41 ;03     3       in      - "UART" status: bit 0 = rx, bit 1 = tx
  42 ;04     4       in      - "UART" data register, no wait
  43 ;
  44 ;------------------------ Virtual I2C interface --------------------------
  45 ;05     5       out     - Control Port: 1 = Start read operation
  46 ;                                       2 = Start write operation
  47 ;05     5       in      - Status of last Transfer: 0 = ok, else fail
  48 ;06     6       in/out  - Number of bytes to transfer, including Slave address
  49 ;07,08  7,8     in/out  - Read/Write address low/high
  50 ;
  51 ;------------------------ Disk I/O ---------------------------------------
  52 ;0D,0E  13,14   in/out  - Set address of Bios Controll Block
  53 ;0F     15      in/out  - Disk select
  54 ;10,11  16,17   in/out  - Track select
  55 ;12,13  18,19   in/out  - Sector select
  56 ;14,15  20,21   in/out  - Write addr
  57 ;
  58 ;16     22      out     - Trigger disk i/o operations
  59 ;                         Bit 7 = 1: Read sector
  60 ;                         Bit 6 = 1: Write sector
  61 ;                         Bit 5 = 1: BIOS WBOOT
  62 ;                         Bit 4 = 1: BIOS Home
  63 ;                         Only one of bits 4..7  may be set.
  64 ;                         If Write function (bit 6=1):
  65 ;                          Bits 0..2: 0 - write to allocated
  66 ;                                     1 - write to directory
  67 ;                                     2 - write unallocated
  68 ;                                     3 - write to directory
  69 ;
  70 ;16     22      in      - Result of last read/write operation.
  71 ;                         0x00 = ok, 0xff = error (--> Bad Sector)
  72 ;
  73 ;
  74 ;
  75 ;------------------------ Wall Clock and Timers --------------------------
  76 ;40     64-71   in/out  - Timer/Clock control.
  77 ;41-46
  78 ;
  79 ;47-4D          clock   - BCD format: ss, mm, hh,  DD, MM, YYl, YYh
  80 ;
  81 ;------------------------ Ports ------------------------------------------
  82 ;80-87          in/out  - Port-Expander PCF8574 (max. 8 Chips)
  83 ;88-8F          in/out  - Port-Expander PCF8574A (not implemented yet!)
  84
  85
  86 READ_FUNC   equ 7
  87 WRITE_FUNC  equ 6
  88 BOOT_FUNC   equ 5
  89 HOME_FUNC   equ 4
  90
  91 TIMERCTL        equ     040h
  92 TIMER_MSECS     equ     TIMERCTL+1
  93 TIMER_SECS      equ     TIMER_MSECS+2
  94 starttimercmd   equ     1
  95 quitTimerCmd    equ     2
  96 printTimerCmd   equ     15
  97 uptimeCmd       equ     16
  98
  99 CLOCKPORT       equ     TIMERCTL+7
 100
 101 DEBUGPORT       equ     04FH
 102 StartTraceCmd   equ     1
 103 StopTraceCmd    equ     0
 104
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 108