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annotate 3rdparty/drivers/burke/bbhdisk.asm @ 1879:72cb2773d5ee

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rules.mak updated with new rules pacos9 updates
author boisy
date Mon, 15 Aug 2005 11:46:16 +0000
parents c10820aa211b
children
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1 *******************************************
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2 *** ***
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3 *** COPYRIGHT 1990 BURKE & BURKE ***
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4 *** ALL RIGHTS RESERVED ***
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5 *** ***
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6 *******************************************
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7
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8 nam BBHDISK
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9
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10 *
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11 * CoCo XT Hard Disk Driver Version 2.0
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12 *
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13 *
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14 * For Western Digital WD1002-WX2 (or WX1) Controller.
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15 *
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16 * This is a general purpose driver. It can handle
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17 * 1-4 hard drives, the parameters of which are described
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18 * in the device descriptors. The drives may be of different
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19 * sizes. This version is optimized for the CoCo 3 under level
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20 * 2 OS9. It does not mess with the clock speed -- the native
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21 * speed is used. It also verifies disk writes, and uses
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22 * read caching.
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23 *
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24
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25 *
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26 * Chris Burke Schaumburg, IL 01/26/88
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27 *
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28
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29 page
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30 *
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31 * Conditional assembly control
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32 *
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33
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34 *Drives equ 2 ;Number of drives supported
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35 Drives equ 4 ;Number of drives supported (2 per controller)
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36
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37 irqflg equ 0 ;non-zero to mask interrupts during HD access
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38 trsflg equ 0 ;non-zero if optimized for 4 heads, 32 SPT
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39 cchflg equ 1 ;non-zero if read cache supported
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40 vrfflg equ 1 ;non-zero if write verification supported
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41 tboflg equ 0 ;non-zero if jump to 2 MHz for block moves
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42 fstflg equ 1 ;non-zero if fast transfers supported
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43 sysram equ 1 ;non-zero to use system RAM for verf buffer
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44 sizflg equ 1 ;non-zero to allow drives of different sizes
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45
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46 fmtflg equ 0 ;non-zero if hard formatting supported
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47 errflg equ 1 ;non-zero for good error messages
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48 icdflg equ 0 ;non-zero to ignore C/D status bit
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49 timflg equ 0 ;non-zero to support access timer
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50
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51 XLEVEL equ 2 ;Bogus level 2 flag
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52
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53 testing equ 0 ;non-zero to call driver "XD", not "HD"
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54
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55 *
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56 * Include the main line
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57 *
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58
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59 use xtos9.src
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60