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annotate defs/cocosdc.d @ 3168:fdc657942606

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Expand help messages after inspection of source code
author Neal Crook <foofoobedoo@gmail.com>
date Mon, 17 Apr 2017 21:29:07 +0100
parents 3afecdae6f53
children
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05426dd4e24e ll_init now puts CoCo SDC in enhanced mode.
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1 ********************************************************************
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2 * cocosdc.d - CoCo SDC definitions
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3 *
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4 * $Id$
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5 *
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6 * Edt/Rev YYYY/MM/DD Modified by
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7 * Comment
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8 * ------------------------------------------------------------------
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9 * 2014/05/02 Boisy G. Pitre
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10 * Created
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11 * 2014/12/22 Darren Atkinson
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12 * Additional hardware symbols
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13
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14 IFNE COCOSDC.D-1
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15 COCOSDC.D SET 1
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18 * Main Port Address (V.PORT)
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19 SDAddr SET $FF4A
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20
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21 * Hardware Addressing - CoCo Scheme
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22 CTRLATCH equ $FF40 controller latch (write)
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23 CMDREG equ $FF48 command register (write)
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24 STATREG equ $FF48 status register (read)
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25 PREG1 equ $FF49 param register 1
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26 PREG2 equ $FF4A param register 2
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27 PREG3 equ $FF4B param register 3
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28 DATREGA equ PREG2 first data register
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29 DATREGB equ PREG3 second data register
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30 FLSHDAT equ $FF42 flash data register
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32 * Status Register Masks
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33 BUSY equ %00000001 set while a command is executing
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34 READY equ %00000010 set when ready for a data transfer
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35 FAILED equ %10000000 set on command failure
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37 * Command and Mode Values
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38 CMDMODE equ $43 control latch value to enable command mode
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39 CMDREAD equ $80 read logical sector
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40 CMDWRITE equ $A0 write logical sector
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41 CMDEX equ $C0 extended command
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42 CMDEXD equ $E0 extended command with data block
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45 ENDC