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view level1/modules/dwinit.asm @ 2897:260116065a2f lwtools-port

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arcadepak: Add empty_smash.txt and empty_thexder.txt dummy files This was done in default branch in commit 9b29d654db13 but did not get into the lwtools branch. We'll probably do this differently later, but for now I'll just pick this solution. At this point everything I have spotted of useful changes in the default branch has been pushed to the lwtools branch. I have cherry-picked changes both ways in order to make a merge easier, but a real merge will probably not be useful. I did try it out and waded through merge conflicts and diff'ed the result with current lwtools branch, so I am pretty sure nothing useful will be lost.
author Tormod Volden <debian.tormod@gmail.com>
date Sat, 11 Jan 2014 18:20:09 +0100
parents ce3dba57003b
children c505ae3120c4
line wrap: on
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*******************************************************
*
* DWInit
*    Initialize DriveWire for CoCo Bit Banger

DWInit
               IFNE     ARDUINO

* setup PIA PORTA (read)
               clr       $FF51
               clr       $FF50
               lda       #$2C
               sta       $FF51

* setup PIA PORTB (write)
               clr       $FF53
               lda       #$FF
               sta       $FF52
               lda       #$2C
               sta       $FF53
               rts

               ELSE

               pshs      a,x
               IFDEF     PIA1Base
               ldx       #PIA1Base           $FF20
               clr       1,x                 clear CD
               lda       #%11111110
               sta       ,x
               lda       #%00110100
               sta       1,x
               lda       ,x
               ENDC
               puls       a,x,pc

               ENDC