nam   getclk
         ttl   program module       

* Disassembled 98/06/01 09:08:21 by Disasm v1.5 (C) 1988 by RML

         ifp1
         use   defsfile
         endc

* MPI slot selection code
* $33 = Slot 4
* $22 = Slot 3
* $11 = Slot 2
* $00 = Slot 1
MPISlot  equ   $33

tylg     set   Prgrm+Objct
atrv     set   ReEnt+rev
rev      set   $02

         mod   eom,name,tylg,atrv,start,size

SWSubr   rmb   202
ROMAddr  rmb   2
Blk0Addr rmb   2
u00CE    rmb   1
TmpSecs  rmb   1
NumSecs  rmb   1
TimePckt rmb   6
         rmb   200

size     equ   .

name     fcs   /getclk/
         fcb   $02

start    equ   *
         clr   <u00CE
         cmpd  #$0002
         bcs   L003F
         com   <u00CE
         ldd   ,x
         cmpb  #$0D
         beq   ProcParm
         subd  #$2F30
L0027    suba  #$01
         beq   L0037
         addb  #$0A
         bra   L0027

* process parameter
ProcParm suba  #$30
         cmpa  #$09
         bcc   L0093
         tfr   a,b
L0037    cmpb  #$3C
         bcc   L0093
         stb   <TmpSecs
         stb   <NumSecs

L003F    leax  ,u
         leay  >L0098,pcr
         ldb   #$88
L0047    lda   ,y+
         sta   ,x+
         decb
         bne   L0047
L004E    pshs  u
         ldx   #$003E                  X holds ROM block
         incb                          set B to 1
         os9   F$MapBlk                map into our addr space
         leax  ,u                      set X to address of ROM block
         stx   <ROMAddr                save X
         ldx   #$0000                  get block zero (OS-9 globs, etc)
         os9   F$MapBlk                map into our address space
         leax  ,u                      point X to U
         stx   <Blk0Addr               save X
         puls  u
         jsr   <SWSubr
         pshs  u
         ldb   #1
         ldu   <ROMAddr
         os9   F$ClrBlk                clear this block from our space
         ldu   <Blk0Addr
         os9   F$ClrBlk                clear this block from our space
         puls  u
         os9   F$STime
         bcs   L0095
         clrb
         tst   <u00CE
         beq   L0095
L0083    ldx   #$0DD0
         os9   F$Sleep
         dec   <TmpSecs
         bne   L0083
         lda   <NumSecs
         sta   <TmpSecs
         bra   L004E
L0093    ldb   #E$IllArg
L0095    os9   F$Exit

* Exit:
*   X  = address of time packet with time from SW
L0098    pshs  cc
         orcc  #FIRQMask+IRQMask
         lda   $FF7F
         ldb   >D.HINIT,x              get GIME INT0 value in OS-9 globs
         ldx   <ROMAddr                point X to rom block address
         pshs  b,a                     save GIME INT0 value/MPI slot
         lda   #MPISlot                get slot where SW is
         sta   $FF7F                   select it
         andb  #$FC                    16x16 ROM
         stb   >$FF90                  save it in HW
         leay  >L0117,pcr
         sta   >$FFDE                  put CC3 in ROM mode
         lda   $04,x                   read ROM block (trigger SW?)
L00BA    ldb   #$08
         lda   ,y+
         beq   L00CD
L00C0    lsra
         bcs   L00C6
         tst   ,x
         fcb   $8C
L00C6    fdb   $6D01
         decb
         beq   L00BA
         bra   L00C0
L00CD    lda   #$08
L00CF    ldb   #$08
         pshs  b,a
L00D3    ldb   4,x
         lsrb
         rora
         dec   1,s                     dec count (B) on stack
         bne   L00D3
         bsr   L0107
         stb   1,s
         puls  a
         deca
         bne   L00CF
         sta   >$FFDF                  put in ALL RAM Mode
         leax  >TimePckt,u
         ldd   ,s                      get year/Month
         std   ,x                      save year/month
         lda   2,s                     get day
         sta   2,x                     save day
         ldd   4,s                     get hour/min
         std   3,x                     save hour/min
         lda   6,s                     get seconds
         sta   5,x                     save seconds
         leas  8,s                     clean stack
         puls  b,a                     get GIME INT0, org MPI slot
         sta   >$FF7F                  restore org MPI slot
         stb   >$FF90                  restore org GIME INT0
         puls  pc,cc

L0107    clrb
L0108    cmpa  #$10
         bcs   L0112
         suba  #$10
         addb  #$0A
         bra   L0108
L0112    pshs  a
         addb  ,s+
         rts

L0117    fcb   $C5,$3A,$A3,$5C
         fcb   $C5,$3A,$A3,$5C
         fcb   $00

         emod
eom      equ   *
         end