********************************************************************
* WordPakII - Word-Pak II Driver
*
* $Id$
*
* NOTE: This driver is currently a stand-alone SCF driver.  Work has
* started to convert it into a co-module that would fit under the
* CCIO driver hierarchy, but that work is not complete.
*
* Edt/Rev  YYYY/MM/DD  Modified by
* Comment
* ------------------------------------------------------------------
*   5      1985?/??/??
* Original OS-9 Level One Driver

         nam   WordPakII
         ttl   Word-Pak II Driver    

* Disassembled 2005/01/06 19:47:27 by Disasm v1.5 (C) 1988 by RML

         ifp1
         use   defsfile
         use   vtiodefs
         endc

tylg     set   Drivr+Objct   
atrv     set   ReEnt+rev
rev      set   $01
edition  set   5

CO80     equ   0
SIZEX    equ   80
SIZEY    equ   24

         mod   eom,name,tylg,atrv,start,size
         rmb   $1D
V.PIA    rmb   2
         rmb   $BB-$1D-2
size     equ   .

         fcb   $07 

name     
         IFEQ   CO80
         fcs   /WordPakII/
         ELSE
         fcs   /CO80/
         ENDC
         fcb   edition

*         fcc   /(C) 1985 PBJ, Inc./

* WordPak Initialization Values
WPIV     fcb   $6E		R0
         fcb   $50		R1
         fcb   $56		R2
         fcb   $18 		R3
         fcb   $1A 		R4
         fcb   $00 		R5
         fcb   $18 		R6
         fcb   $19 		R7
         fcb   $78		R8
         fcb   $09 		R9
L0034    fcb   $60 		R10
         fcb   $09 		R11
         fcb   $00 		R12
         fcb   $00 		R13
         fcb   $00 		R14
         fcb   $00 		R15
         fcb   $00 		R16
         fcb   $00 		R17
         fcb   $00 		R18
         fcb   $00 		R19
         fcb   $10 		R20

start    bra   Init
         nop   
         IFEQ  CO80
         lbra  Read
         ENDC
         lbra  Write
         bra   GetStat
         nop   
         lbra  SetStat
         IFEQ  CO80
         lbra  Term
         ELSE
         rts
         ENDC

Init
         IFEQ  CO80
         pshs  dp,cc		save DP and CC
         orcc  #IntMasks	mask interrupts
         clra  
         tfr   a,dp		set DP to 0
         stu   <D.KbdSta	save off statics ptr
         nop   
         nop   
         nop   
         nop   
         leax  >IRQSVC,pcr	point to IRQ routine
         stx   <D.AltIRQ	save as alternate IRQ
         ldx   #PIA0Base	get base address of PIA0
         stx   <V.PIA,u		save off in statics
         clrb  			now D = 0
         std   <$27,u
         std   <$29,u
         std   <$2B,u
         std   <$2D,u
* Initialize PIA here
         sta   $01,x
         sta   ,x
         sta   $03,x
         comb  			B = $FF
         stb   $02,x
         stb   <$20,u
         stb   <$21,u
         stb   <$22,u
         lda   #$34
         sta   $01,x
         lda   #$3F
         sta   $03,x
         lda   $02,x
         ENDC
* Initialize WordPak Hardware
         clra  
         leax  <WPIV,pcr	point to initialization values
L0097    ldb   ,x+
         std   [<V.PORT,u]	write to WP hardware
         inca
         cmpa  #$14
         bcs   L0097
         IFEQ  CO80
         ldb   ,x
         stb   <$31,u
         ldx   V.PORT,u		get port address
         lda   #64
         sta   $04,x		???
         lbsr  ClrScr		clear screen
         lda   <L0034,pcr
         sta   <$3A,u
         puls  pc,dp,cc
         ELSE
         rts
         ENDC


GetStat
         IFEQ  CO80
         cmpa  #SS.Ready
         bne   L00C9
         lda   <$2E,u
         suba  <$2D,u
         lbne  L0181
         ldb   #E$NotRdy
         bra   L00F5
L00C9    cmpa  #SS.EOF
         lbeq  L0181
         ldx   R$Y,y
         cmpa  #SS.Joy
         lbeq  SSJOY
         cmpa  #SS.Cursr
         beq   CURSR
         cmpa  #SS.ScSiz
         beq   SCSIZ
         cmpa  #$83
         beq   L00F8
         cmpa  #$84
         beq   L0106
         cmpa  #$86
         beq   L0117
         cmpa  #$87
         beq   L0101
         cmpa  #$88
         beq   L00FC
         ENDC
SetStat  ldb   #E$UnkSvc
L00F5    orcc  #Carry
         rts   
L00F8    lda   #$7F
         bra   L0102
L00FC    lda   <$31,u
         bra   L0102
L0101    clra  
L0102    sta   $01,x
         bra   L0127

L0106    ldd   #80*256+24
         bra   L0125

SCSIZ    ldd   #SIZEX
         std   R$X,x
         ldd   #SIZEY
         std   R$Y,x
         bra   L0127

L0117    ldb   <$3A,u
         bsr   L0129
         andb  #$0F
         bne   L0124
         ldb   #$01
         bra   L0125
L0124    clrb  
L0125    std   R$A,x
L0127    clrb  
         rts   
L0129    pshs  x,b
         clra  
         leax  >L083C,pcr
         andb  #$60
L0132    cmpb  ,x+
         beq   L013B
         inca  
         cmpa  #$03
         bcs   L0132
L013B    puls  x,b
         rts   

CURSR    clrb  
         pshs  b
         ldd   <$34,u
L0144    cmpd  <$32,u
         beq   L0151
         subd  #SIZEX
         inc   ,s
         bra   L0144
L0151    puls  b
         addb  #$20
         clra  
         std   $06,x
         ldd   <$36,u
         subd  <$34,u
         addb  #$20
         clra  
         std   $04,x
         lbsr  L05C2
         anda  #$7F
         sta   $01,x
         ldx   <$36,u
         lbra  L056A

         IFEQ  CO80
Term     pshs  cc
         orcc  #IRQMask
         ldd   >D.Clock			get original clock pointer
         std   >D.AltIRQ		save as alternate IRQ
         puls  pc,cc

L017C    incb  
         cmpb  #$7F
         bls   L0182
L0181    clrb  
L0182    rts   

* Interrupt Service Routine
IRQSVC   ldu   >D.KbdSta		get IRQ static ptr in U
         ldx   <V.PIA,u
         lda   $03,x			get IRQ status bit
         bmi   L0191			branch if set
         jmp   [>D.AltIRQ]		else continue on
L0191    lda   $02,x
         lda   #$FF
         sta   $02,x
         lda   ,x
         coma  
         anda  #$03
         bne   L01A7
         clr   $02,x
         lda   ,x
         coma  
         anda  #$7F
         bne   L01C8
L01A7    ldd   #$FFFF
         std   <$20,u
         std   <$22,u
L01B0    ldd   #$1E05
         std   <$2F,u
L01B6    lda   >$00A0
         beq   L01C4
         deca  
         sta   >$00A0
         bne   L01C4
         sta   >$FF40
L01C4    jmp   [>D.Clock]
L01C8    bsr   L0217
         bpl   L01D0
         bcs   L01B6
         bra   L01B0
L01D0    cmpa  #$1F
         bne   L01D9
         com   <$27,u
         bra   L01B6
L01D9    ldb   <$2D,u
         leax  <$3B,u
         abx   
         bsr   L017C
         cmpb  <$2E,u
         beq   L01EA
         stb   <$2D,u
L01EA    sta   ,x
         beq   L020A
         cmpa  V.PCHR,u		pause character?
         bne   L01FA
         ldx   V.DEV2,u
         beq   L020A
         sta   $08,x
         bra   L020A
L01FA    ldb   #S$Intrpt
         cmpa  V.INTR,u		interrupt character?
         beq   L0206
         ldb   #S$Abort
         cmpa  V.QUIT,u		quit character?
         bne   L020A
L0206    lda   V.LPRC,u
         bra   L020E
L020A    ldb   #S$Wake
         lda   V.WAKE,u
L020E    beq   L0213
         os9   F$Send   
L0213    clr   V.WAKE,u
         bra   L01B6
L0217    clra  
         clrb  
         sta   <$1F,u
         std   <$28,u
         coma  
         sta   <$24,u
         sta   <$25,u
         sta   <$26,u
         deca  
         sta   $02,x
L022C    lda   ,x
         coma  
         anda  #$7F
         beq   L023F
         ldb   #$FF
L0235    incb  
         lsra  
         bcc   L023B
         bsr   L0286
L023B    cmpb  #$06
         bcs   L0235
L023F    inc   <$1F,u
         orcc  #Carry
         rol   $02,x
         bcs   L022C
         bsr   L02C1
         bmi   L0285
         beq   L0268
         suba  #$1A
         bhi   L0268
         adda  #$1A
         ldb   <$29,u
         bne   L0267
         adda  #$40
         ldb   <$28,u
         eorb  <$27,u
         andb  #$01
         bne   L0267
         adda  #$20
L0267    rts   
L0268    ldb   #$03
         mul   
         lda   <$28,u
         beq   L0273
         incb  
         bra   L027A
L0273    lda   <$29,u
         beq   L027A
         addb  #$02
L027A    pshs  x
         leax  >L0344,pcr
         clra  
         lda   d,x
         puls  x
L0285    rts   

L0286    pshs  b
         lslb  
         lslb  
         lslb  
         addb  <$1F,u
         cmpb  #$31
         bne   L0297
         inc   <$29,u
         puls  pc,b
L0297    cmpb  #$37
         bne   L02A0
         com   <$28,u
         puls  pc,b
L02A0    pshs  x
         leax  <$24,u
         bsr   L02AB
         puls  x
         puls  pc,b
L02AB    pshs  a
         lda   ,x
         bpl   L02B5
         stb   ,x
         puls  pc,a
L02B5    lda   $01,x
         bpl   L02BD
         stb   $01,x
         puls  pc,a
L02BD    stb   $02,x
         puls  pc,a
L02C1    pshs  y,x,b
         leax  <$20,u
         ldb   #$03
         pshs  b
L02CA    leay  <$24,u
         ldb   #$03
         lda   ,x
         bmi   L0322
L02D3    cmpa  ,y
         bne   L0319
         tst   <$23,u
         bpl   L02EB
         sta   <$23,u
         pshs  b
         ldd   #$1E05
         std   <$2F,u
         puls  b
         bra   L0301
L02EB    cmpa  <$23,u
         beq   L02F9
         sta   <$23,u
         ldd   #$1E05
         std   <$2F,u
L02F9    tst   <$2F,u
         beq   L0307
         dec   <$2F,u
L0301    clr   ,y
         com   ,y
         bra   L0322
L0307    dec   <$30,u
         beq   L0312
         orcc  #Negative+Carry
L030E    leas  $01,s
         puls  pc,y,x,b
L0312    ldb   #$05
         stb   <$30,u
         bra   L030E
L0319    leay  $01,y
         decb  
         bne   L02D3
         lda   #$FF
         sta   ,x
L0322    leax  $01,x
         dec   ,s
         bne   L02CA
         leas  $01,s
         leax  <$24,u
         lda   #$03
L032F    ldb   ,x+
         bpl   L033A
         deca  
         bne   L032F
         orcc  #Negative
         puls  pc,y,x,b
L033A    leax  <$20,u
         lbsr  L02AB
         tfr   b,a
         puls  pc,y,x,b
         ENDC

L0344    fdb   $4060,$000c,$1c13,$0a1a,$1208,$1810
         fdb   $0919,$1120,$2020,$3030,$1f31,$217c,$3222,$0033
         fdb   $237e,$3424,$0035,$2500,$3626,$0037,$275e,$3828
         fdb   $5b39,$295d,$3a2a,$003b,$2b00,$2c3c,$7b2d,$3d5f
         fdb   $2e3e,$7d2f,$3f5c,$0d0d,$0d00,$0000,$0503
         fcb   $1b

         IFEQ  CO80
Read     leax  <$3B,u
         ldb   <$2E,u
         orcc  #IntMasks
         cmpb  <$2D,u
         beq   L03A8
         abx   
         lda   ,x
         lbsr  L017C
         stb   <$2E,u
         andcc #^(IntMasks+Carry)
         rts   
L03A8    lda   V.BUSY,u
         sta   V.WAKE,u
         andcc #^IntMasks
         ldx   #$0000
         os9   F$Sleep  
         clr   V.WAKE,u
         ldx   >D.Proc
         ldb   <$36,x
         beq   Read
         cmpb  #$03
L03C0    bhi   Read
         coma  
         rts   
         ENDC

SSJOY    pshs  u,y,cc
         orcc  #IntMasks
         ldu   <V.PIA,u		get PIA address
         lda   #$FF
         sta   $02,u
         ldb   ,u
L03D1    ldy   $04,x
         beq   L03DC
         andb  #$02
         beq   L03E1
         bra   L03E0
L03DC    andb  #$01
         beq   L03E1
L03E0    clra  
L03E1    sta   $01,x
         lda   $03,u
         ora   #$08
         ldy   $04,x
         bne   L03EE
         anda  #$F7
L03EE    sta   >$FF03
         lda   $01,u
         anda  #$F7
         bsr   L040B
         std   $04,x
         lda   $01,u
         ora   #$08
         bsr   L040B
         pshs  b,a
         ldd   #$003F
         subd  ,s++
         std   $06,x
         clrb  
         puls  pc,u,y,cc

L040B    sta   $01,u
         clrb  
         bsr   L041A
         bsr   L041A
         bsr   L041A
         bsr   L041A
         lsrb  
         lsrb  
         clra  
         rts   

L041A    pshs  b
         lda   #$7F
         tfr   a,b
L0420    lsrb  
         cmpb  #$03
         bhi   L042C
         lsra  
         lsra  
         tfr   a,b
         addb  ,s+
         rts   

L042C    addb  #$02
         andb  #$FC
         pshs  b
         sta   >PIA1Base
         tst   ,u
         bpl   L043D
         adda  ,s+
         bra   L0420
L043D    suba  ,s+
         bra   L0420

L0441    fcb   $02
         fdb   ClrScr-*	$0276
         fcb   $05
         fdb   Do05-*	$0258
         fcb   $06
         fdb   Do06-*	$03b3
         fcb   $09
         fdb   Do09-*	$0222
         fcb   $0b
         fdb   Do0B-*	$0209
         fcb   $0F
         fdb   Do0F-*	$01fe
         fcb   $13
         fdb   Do13-*	$0283
         fcb   $14
         fdb   Do14-*	$0339
         fcb   $19
         fdb   Do19-*	$023f
         fcb   $1b
         fdb   DoESC-*	$0095
         fcb   $80

L0460    fcb   $01
         fdb   DoH01-*	$01ee
         fcb   $02
         fdb   DoH02-*	$032c
         fcb   $03
         fdb   DoH03-*	$0232
         fcb   $04
         fdb   DoH04-*	$0233
         fcb   $05
         fdb   DoH05-*	$008c
         fcb   $06
         fdb   DoH06-*	$01fd
         fcb   $09
         fdb   DoH09-*	$01e4
         fcb   $0b
         fdb   DoH0B-*	$0261
         fcb   $0c
         fdb   ClrScr-*	$023f
         fcb   $1b
         fdb   DoESC-*	$0076
         fcb   $80

L047F    fcb   $41
         fdb   Do41-*	$021d
         fcb   $42
         fdb   Do42-*	$0254
         fcb   $45
         fdb   Do45-*	$02c2
         fcb   $46
         fdb   Do46-*	$02e5
         fcb   $47
         fdb   Do47-*	$0287
         fcb   $48
         fdb   Do48-*	$0264
         fcb   $53
         fdb   Do53-*	$0058
         fcb   $56
         fdb   Do56-*	$037f
         fcb   $58
         fdb   Do58-*	$0056
         fcb   $57
         fdb   Do57-*	$004b
         fcb   $76
         fdb   Do76-*	$037d
         fcb   $80

Write
         IFEQ  CO80
         fcb   $6D,$C8,$2C
         lbne  L079C
         ldx   <$36,u
         tst   <$2A,u
         bne   L04FD
         ENDC
         cmpa  #C$SPAC		space?
         lbcc  L053A		branch if >=
         cmpa  #C$CR		carriage return?
         lbeq  L0557		branch if equal
         cmpa  #C$LF		line feed?
         lbeq  L055C		branch if equal
         cmpa  #C$BSP		backspace?
         lbeq  L056A		branch if equal
         tst   V.TYPE,u		look at type
         bmi   L04D2		branch if hi-bit set
         leay  >L0441,pcr
         bra   L04D6
L04D2    leay  >L0460,pcr
L04D6    cmpa  ,y+
         beq   L04E2
         leay  $02,y
         tst   ,y
         bpl   L04D6
         bra   L0555
L04E2    ldd   ,y
         jmp   d,y

Do57     lda   #$57
         bra   L04F4

Do53     lda   #$53
         bra   L04F4

Do58     lda   #$58
         bra   L04F4

DoESC    lda   #$1B
L04F4    sta   <$2A,u
L04F7    clrb  
         rts   

DoH05
Do01     lda   #$05
         bra   L04F4

L04FD    ldb   <$2A,u
         clr   <$2A,u
         tst   V.TYPE,u		get type byte
         bmi   L0513		branch if hi-bit set
         cmpb  #$2E
         lbeq  L0807
         cmpa  #$2E
         beq   L04F4
         clrb  
         rts   

L0513    cmpb  #$05
         beq   L04F7
         cmpb  #$57
         lbeq  L0822
         cmpb  #$53
         lbeq  L07F2
         cmpb  #$58
         bne   L0534
         suba  #$20
         ble   L0555
         cmpa  #$10
         bhi   L0555
         sta   <$31,u
         bra   L0555
L0534    leay  >L047F,pcr
         bra   L04D6
L053A    bsr   L05A1
         leax  $01,x
         stx   <$36,u
         bsr   L058C
         ldx   <$34,u
         leax  <$50,x
         cmpx  <$36,u
         bhi   L0555
L054E    stx   <$34,u
         bsr   L05CD
L0553    bsr   L0587
L0555    clrb  
         rts   

L0557    ldx   <$34,u
         bra   L0582
L055C    leax  <$50,x
         stx   <$36,u
         ldx   <$34,u
         leax  <$50,x
         bra   L054E
L056A    cmpx  <$34,u
         bhi   L0580
         ldy   <$34,u
         cmpy  <$32,u
         beq   L0555
         leay  <-$50,y
         sty   <$34,u
L0580    leax  -$01,x
L0582    stx   <$36,u
         bra   L0553
L0587    ldx   <$36,u
L058A    bsr   L0591
L058C    lda   #$0E
         bsr   L0593
         rts   
L0591    lda   #$12
L0593    pshs  x
         ldb   ,s+
         std   [<V.PORT,u]
         inca  			increment A
         ldb   ,s+
         std   [<V.PORT,u]
         rts   
L05A1    tst   <$2B,u
         beq   L05AA
         ora   #$80
         bra   L05AC
L05AA    anda  #$7F
L05AC    bsr   L05B7
         pshs  x
         ldx   $01,u
         sta   $03,x
         puls  x
         rts   
L05B7    ldb   #$1F
         stb   [<V.PORT,u]
L05BC    tst   [<V.PORT,u]
         bpl   L05BC
         rts   
L05C2    bsr   L05B7
         pshs  x
         ldx   $01,u
         lda   $03,x
         puls  x
L05CC    rts   
L05CD    ldd   <$34,u
         subd  <$32,u
         cmpd  #SIZEX*SIZEY
         bmi   L05CC
         lbsr  L06AE
         ldx   <$32,u
         leax  <$50,x
         cmpx  #$5000
         bmi   L05F3
         ldx   #SIZEX*SIZEY-SIZEX
         stx   <$34,u
         stx   <$36,u
         ldx   #$0000
L05F3    stx   <$32,u
         ldy   $01,u
         leay  $04,y
         ldb   <$31,u
         cmpb  #$10
         beq   L062A
         negb  
         andb  #$0F
         lda   #$C0
L0607    pshs  b
         pshs  b
         ldb   #$20
         inca  
         cmpa  #$CA
         beq   L0628
L0612    bitb  [<V.PORT,u]
         bne   L0612
L0617    bitb  [<V.PORT,u]
         beq   L0617
         sta   ,y
         dec   ,s
         bne   L0612
         puls  b
         puls  b
         bra   L0607
L0628    leas  $02,s
L062A    tfr   x,d
         tfr   a,b
         lda   #$0C
         pshs  b,a
         tfr   x,d
         lda   #$0D
         pshs  b,a
         ldb   #$20
L063A    bitb  [<V.PORT,u]
         beq   L063A
         puls  x,b,a
         stx   [<V.PORT,u]
         std   [<V.PORT,u]
         lda   #$40
         sta   ,y
         lbsr  L0587
         rts   


DoH01
Do0F     ldx   <$32,u
         stx   <$34,u
         bra   L0693

DoH09
Do0B     ldx   <$34,u
         cmpx  <$32,u
         bls   L0696
         leax  <-$50,x
         stx   <$34,u
         ldx   <$36,u
         leax  <-$50,x
         bra   L0693

DoH06
Do09     ldd   <$34,u
         addd  #SIZEX-1
         cmpd  <$36,u
         bhi   L068E
         ldx   <$32,u
         leax  >SIZEX*SIZEY-SIZEX,x
         cmpx  <$34,u
         beq   L0696
         ldx   <$34,u
         leax  <$50,x
         stx   <$34,u
L068E    ldx   <$36,u
         leax  $01,x
L0693    stx   <$36,u
L0696    lbra  L0553

DoH03
Do19
         bsr   L06AE
         clrb  
         rts   

Do41
DoH04
Do05     bsr   L06A1
         clrb  
         rts   
L06A1    ldd   <$34,u
         addd  #SIZEX
         subd  <$36,u
         tfr   d,y
         bra   L06B5
L06AE    ldx   <$34,u
         ldy   #SIZEX
L06B5    lbra  L0768
Do02
ClrScr   ldx   <$32,u
         ldy   #2048
         bsr   L06E6
         ldx   #$0000
         stx   <$32,u
         stx   <$34,u
         stx   <$36,u
         lda   #$0C
         lbsr  L0593
         lbsr  L058A
         clrb  
         rts   

Do42
DoH0B
Do13
         ldd   <$32,u
         addd  #2048
         subd  <$36,u
         tfr   d,y
         bsr   L06E6
         bra   L0696
L06E6    lbsr  L0591
L06E9    lda   #$20
L06EB    lbsr  L05A1
         leay  -$01,y
         bne   L06EB
         rts   

Do48     ldx   <$34,u
         tfr   x,y
         leax  <$4F,x
         pshs  x
L06FD    leax  $08,y
         bsr   L0733
         cmpx  ,s
         bcc   L0709
         leay  $01,y
         bra   L06FD
L0709    leas  $02,s
         ldy   #$0008
         bsr   L06E9
         bra   L0696

Do47     ldy   <$34,u
         leay  <$4F,y
L071A    leax  -$08,y
         bsr   L0733
         cmpx  <$34,u
         bls   L0727
         leay  -$01,y
         bra   L071A
L0727    ldx   <$34,u
         ldy   #$0008
         bsr   L06E6
         lbra  L0553
L0733    lbsr  L0591
         lbsr  L05C2
         pshs  a
         exg   x,y
         lbsr  L0591
         puls  a
         lbsr  L05AC
         exg   x,y
         rts   

Do45     ldy   <$32,u
         leay  >$077F,y
L0750    leax  <-$50,y
         bsr   L0733
         cmpx  <$34,u
         bls   L075E
         leay  -$01,y
         bra   L0750
L075E    ldx   <$34,u
         stx   <$36,u
L0764    ldy   #SIZEX
L0768    lbsr  L06E6
         lbra  L0553

Do46     ldy   <$32,u
         leay  >SIZEX*SIZEY-SIZEX,y
         pshs  y
         ldy   <$34,u
L077C    leax  <$50,y
         bsr   L0733
         cmpy  ,s
         bcc   L078A
         leay  $01,y
         bra   L077C
L078A    leas  $02,s
         tfr   y,x
         bra   L0764

DoH02
Do14
         ldb   #$58
         tst   V.TYPE,u
         bmi   L0797
         incb  
L0797    stb   <$2C,u
         clrb  
         rts   

L079C    suba  #$20
         ldb   <$2C,u
         tst   V.TYPE,u
         bpl   L07B1
         cmpb  #$58
         bne   L07AD
         bsr   L07C6
         bra   L07F0
L07AD    bsr   L07B9
         bra   L07D5
L07B1    cmpb  #$59
         bne   L07D3
         bsr   L07B9
         bra   L07F0
L07B9    cmpa  #$17
         bls   L07BF
         lda   #$17
L07BF    sta   <$38,u
         dec   <$2C,u
         rts   
L07C6    cmpa  #$4F
         bls   L07CC
         lda   #$4F
L07CC    sta   <$39,u
         inc   <$2C,u
         rts   
L07D3    bsr   L07C6
L07D5    lda   <$38,u
         ldb   #SIZEX
         mul   
         ldx   <$32,u
         leax  d,x
         stx   <$34,u
         ldb   <$39,u
         abx   
         stx   <$36,u
         lbsr  L0587
         clr   <$2C,u
L07F0    clrb  
         rts   
L07F2    suba  #$20
         beq   L0802
         deca  
         beq   L0801
         bra   L0805

Do06     clra  
         tst   <$2B,u
         bne   L0802
L0801    coma  
L0802    sta   <$2B,u
L0805    clrb  
         rts   

L0807    suba  #$30
         cmpa  #$04
         bhi   L083A
         leax  <L083F,pcr
         ldb   a,x
         bra   L0832

Do56     ldb   #$F0
         andb  <$3A,u
         bra   L0832

Do76     ldb   #$08
         orb   <$3A,u
         bra   L0832
L0822    suba  #$20
         cmpa  #$03
         bhi   L083A
         leax  <L083C,pcr
         ldb   <$3A,u
         andb  #$9F
         orb   a,x
L0832    stb   <$3A,u
         lda   #$0A
         std   [<V.PORT,u]
L083A    clrb  
         rts   

L083C    neg   <$60
         nega  
L083F    fcb   $20,$60,$00,$68,$08

         emod
eom      equ   *
         end
