2019-07-01 17:33:44 +00:00
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; Note: we *know* this is running in bank 0
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cpu_clk = 2800000 ; nominally
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PLATFORM_INCLUDE "platform-include.inc"
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.proc _scrn_tab
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.addr $400
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.addr $480
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.addr $500
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.addr $580
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.addr $600
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.addr $680
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.addr $700
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.addr $780
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.addr $428
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.addr $4A8
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.addr $528
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.addr $5A8
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.addr $628
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.addr $6A8
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.addr $728
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.addr $7A8
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.addr $450
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.addr $4D0
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.addr $550
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.addr $5D0
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.addr $650
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.addr $6D0
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.addr $750
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.addr $7D0
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.endproc
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.proc _system_interface
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phx
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asl
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tax
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jmp (table,x)
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table: .addr _sf_pre_init
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.addr _sf_post_init
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.addr _sf_emit
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.addr _sf_keyq
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.addr _sf_key
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.addr _sf_fcode
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.addr _sf_reset_all
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.endproc
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.export _system_interface
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.proc _emulation_call
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sta AREG
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tdc
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sta f:DPSAVE
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tsc
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sta f:SPSAVE
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lda SYS_RSTK
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tcs
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lda #$0000
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tcd
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lda AREG
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sec
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xce
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.a8
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.i8
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ldx #$00
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jsr (ECALL,x)
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php ; save carry state
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clc
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xce ; back to native
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plp ; get it back
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rep #SHORT_A|SHORT_I ; go to long registers
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.a16
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.i16
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sta AREG ; save A while we do this thing
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lda f:SPSAVE
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tcs
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lda f:DPSAVE
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tcd
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lda AREG
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rts
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.endproc
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; A=call number, Y=address
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.proc _p8_call
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sty plist
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sep #SHORT_A
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.a8
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sta callnum
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rep #SHORT_A
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.a16
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tdc
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sta f:DPSAVE
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tsc
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sta f:SPSAVE
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lda SYS_RSTK
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tcs
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lda #$0000
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tcd
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sec
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xce
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.a8
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.i8
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jsr MLI
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callnum: .byte $00
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plist: .addr $0000
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php
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clc
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xce
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plp
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rep #SHORT_A|SHORT_I
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.a16
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.i16
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and #$00FF
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sta AREG
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lda f:SPSAVE
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tcs
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lda f:DPSAVE
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tcd
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lda AREG
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rts
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.endproc
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.proc _sf_success
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lda #$0000
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tay
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clc
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rtl
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.endproc
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.proc _sf_fail
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ldy #.loword(-21)
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lda #.hiword(-21)
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sec
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rtl
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.endproc
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.proc _sf_pre_init
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; Most initialization happens outside of the Forth system
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stz ESCMODE
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plx
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bra _sf_success
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.endproc
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.proc _sf_post_init
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plx
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bra _sf_success
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.endproc
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.proc _sf_emit
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phk ; ensure we are working with bank 0
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plb
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plx
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jsr _popay
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phx
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cpy #$00
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beq do_null ; ignore nulls
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lda ESCMODE
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asl
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tax
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jmp (table,x)
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table: .addr _mode0 ; no ESC sequence in progress
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.addr _mode1 ; ESC but no [ yet
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.addr _mode2 ; ESC[ in progress
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do_null: plx
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jmp _sf_success
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.endproc
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.proc _mode0
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cpy #$1B ; ESC
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bne :+
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inc ESCMODE
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bra done
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: cpy #$0B ; OF code for cursor up
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bne :+
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ldy #$1F ; Apple II code for cursor up
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: jsr _con_write
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done: plx
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jmp _sf_success
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.endproc
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.proc _mode1
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cpy #'[' ; second char in sequence?
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beq :+ ; yes, change modes
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stz ESCMODE ; otherwise back to mode 0
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phy
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ldy #$1B
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jsr _con_write ; output the ESC we ate
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ply
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jsr _con_write ; and output this char
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bra done
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: stz ESCACC
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stz ESCNUM1
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inc ESCMODE ; sequence started!
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done: plx
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jmp _sf_success
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.endproc
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.proc _mode2
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cpy #' ' ; ignore spaces in codes
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beq done
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cpy #';'
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bne :+
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lda ESCACC ; move ACC to NUM1 if ;
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sta ESCNUM1 ; note that only supports two params!
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stz ESCACC
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bra done
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: tya
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sec
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sbc #$30
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bmi endesc ; eat it and end ESC mode if invalid
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cmp #$0a
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bcs :+ ; try letters if not a digit
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tay ; a digit, accumulate it into ESCACC
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lda #10 ; multiply current ESCACC by 10
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sta MNUM2
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lda #$0000 ; initialize result
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beq elp
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do_add: clc
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adc ESCACC
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lp: asl ESCACC
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elp: lsr MNUM2
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bcs do_add
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bne lp
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sta ESCACC ; now add the current digit
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tya
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clc
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adc ESCACC
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sta ESCACC
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bra done
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: tya ; not a digit, try letter codes
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sbc #'@' ; carry was set above
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bmi endesc
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cmp #$1B ; ctrl+Z
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bcc upper ; upper case code
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sbc #$20 ; convert lower case to 00-1A
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bmi endesc
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cmp #$1B
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bcc lower ; lower case codes
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endesc: stz ESCMODE
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done: plx
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jmp _sf_success
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none: rts
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upper: asl
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tax
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jsr (utable,x)
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bra endesc
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utable: .addr ich ; @ insert char
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.addr cuu ; A cursor up
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.addr cud ; B cursor down
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.addr cuf ; C cursor forward
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.addr cub ; D cursor backward
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.addr cnl ; E cursor next line
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.addr cpl ; F cursor previous line
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.addr cha ; G cursor horizontal absolute
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.addr cup ; H cursor position
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.addr none ; I
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.addr ed ; J erase display
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.addr el ; K erase line
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.addr il ; L insert lines
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.addr dl ; M delete lines
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.addr none ; N
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.addr none ; O
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.addr dch ; P delete char
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.addr none ; Q
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.addr none ; R
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.addr su ; S scroll up
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.addr sd ; T scroll down
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.addr none ; U
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.addr none ; V
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.addr none ; W
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.addr none ; X
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.addr none ; Y
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.addr none ; Z
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lower: asl
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tax
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jsr (ltable,x)
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bra endesc
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ltable: .addr none ; `
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.addr none ; a
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.addr none ; b
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.addr none ; c
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.addr none ; d
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.addr none ; e
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.addr cup ; f cursor position
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.addr none ; g
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.addr none ; h
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.addr none ; i
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.addr none ; j
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.addr none ; k
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.addr none ; l
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.addr sgr ; m set graphic rendition
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.addr none ; n device status report (requires input buffer)
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.addr none ; o
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.addr none ; p normal screen (optional)
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.addr none ; q invert screen (optional)
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.addr none ; r
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.addr none ; s reset screen (optional)
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.addr none ; t
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.addr none ; u
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.addr none ; v
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.addr none ; w
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.addr none ; x
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.addr none ; y
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.addr none ; z
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; cursor up
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cuu: ldy #$1F
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jmp con_wr_n
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; cursor down
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cud: ldy #$0A
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jmp con_wr_n
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; cursor forward
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cuf: ldy #$1C
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jmp con_wr_n
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; cursor backwards
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cub: ldy #$08
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jmp con_wr_n
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; cursor previous line
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cpl: jsr cuu
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bra :+ ; eventually repos cursor
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; cursor next line
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cnl: jsr cud
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: lda #$0001 ; set horizontal position to 1
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sta ESCACC
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; fall-through to CHA
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; cursor horizontal absolute
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cha: lda a:_CV ; get current cursor vertical
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and #$00FF
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inc a ; because ANSI counts from 1...
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sta ESCNUM1
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; fall-through to CUP
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; cursor position
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cup: ldx ESCACC
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beq :+ ; if it's zero, leave it as such
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dex
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: ldy ESCNUM1
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beq :+
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dey
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: jmp _goto_xy
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; erase display
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ed: lda ESCACC
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beq clreos
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dec a
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bne :+
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rts ; if 1, clear from beginning to cursor (not supported)
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: lda _CV ; otherwise clear whole screen
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and #$FF
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pha
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lda _CH
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and #$FF
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pha
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jsr clrscr
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plx
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ply
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jmp _goto_xy
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clrscr: ldy #$0C
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jmp _con_write
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clreos: ldy #$0B
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jmp _con_write
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; erase line
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el: ldy #$1D ; clear to end of line
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lda ESCACC
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beq :+
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cmp #$02
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bne :++
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erase_ln: ldy #$1A ; clear entire line
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: jmp _con_write
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: rts
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; insert line, cheat because no native function in firmware
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; scroll the lines downward and then exit through erase_ln
|
|
|
|
|
il: jsr _cursor_off
|
|
|
|
|
jsr do_il
|
|
|
|
|
dec ESCACC
|
|
|
|
|
bmi :+
|
|
|
|
|
beq :+
|
|
|
|
|
bra il
|
|
|
|
|
: jmp _cursor_on
|
|
|
|
|
do_il: lda #23 ; start at line 23 and move toward CV
|
|
|
|
|
sta ZR ; source line
|
|
|
|
|
: lda _CV ; is it the current line?
|
|
|
|
|
and #$FF
|
|
|
|
|
cmp ZR
|
|
|
|
|
beq erase_ln ; it is, erase it
|
|
|
|
|
jsr _80store_on
|
|
|
|
|
lda ZR
|
|
|
|
|
asl
|
|
|
|
|
tax
|
2019-07-09 19:31:40 +00:00
|
|
|
ldy _scrn_tab,x ; get dest line address
|
2019-07-01 17:33:44 +00:00
|
|
|
dec ZR ; next lower line
|
|
|
|
|
lda ZR
|
|
|
|
|
asl
|
|
|
|
|
tax
|
|
|
|
|
lda _scrn_tab,x ; get source line address
|
|
|
|
|
tax
|
|
|
|
|
jsr _copy_line
|
|
|
|
|
jsr _80store_off
|
|
|
|
|
bra :-
|
|
|
|
|
; delete line
|
|
|
|
|
dl: jsr _cursor_off
|
|
|
|
|
jsr do_dl
|
|
|
|
|
dec ESCACC
|
|
|
|
|
bmi :+
|
|
|
|
|
beq :+
|
|
|
|
|
bra dl
|
|
|
|
|
: jmp _cursor_on
|
|
|
|
|
do_dl: lda _CV ; start at CV and move toward line 23
|
|
|
|
|
and #$FF
|
|
|
|
|
sta ZR
|
|
|
|
|
: lda ZR ; dest line
|
|
|
|
|
cmp #23 ; is it 23?
|
|
|
|
|
bne :+ ; no, go move the lines
|
|
|
|
|
lda _CV ; save current cursor pos
|
|
|
|
|
and #$FF
|
|
|
|
|
pha
|
|
|
|
|
lda _CH
|
|
|
|
|
and #$FF
|
|
|
|
|
pha
|
|
|
|
|
tax
|
|
|
|
|
ldy #23 ; position on bottom line
|
|
|
|
|
jsr _goto_xy
|
|
|
|
|
jsr erase_ln ; and clear it out
|
|
|
|
|
plx
|
|
|
|
|
ply
|
|
|
|
|
jmp _goto_xy
|
|
|
|
|
: jsr _80store_on
|
|
|
|
|
lda ZR
|
|
|
|
|
asl
|
|
|
|
|
tax
|
|
|
|
|
ldy _scrn_tab,x
|
|
|
|
|
inc ZR
|
|
|
|
|
lda ZR
|
|
|
|
|
asl
|
|
|
|
|
tax
|
|
|
|
|
lda _scrn_tab,x
|
|
|
|
|
tax
|
|
|
|
|
jsr _copy_line
|
|
|
|
|
bra :--
|
|
|
|
|
; insert char
|
2019-07-09 19:31:40 +00:00
|
|
|
ich: jsr _80store_on
|
|
|
|
|
lda a:_CH
|
|
|
|
|
and #$00FF
|
|
|
|
|
tax
|
|
|
|
|
: jsr _get_char
|
|
|
|
|
inx
|
|
|
|
|
jsr _put_char
|
|
|
|
|
cpx #79
|
|
|
|
|
bcc :-
|
|
|
|
|
lda a:_CH
|
|
|
|
|
and #$00FF
|
|
|
|
|
tax
|
|
|
|
|
lda #' '
|
|
|
|
|
jsr _put_char
|
|
|
|
|
jsr _80store_off
|
|
|
|
|
rts
|
2019-07-01 17:33:44 +00:00
|
|
|
; delete char
|
2019-07-09 19:31:40 +00:00
|
|
|
dch: jsr _80store_on
|
|
|
|
|
ldx #79
|
|
|
|
|
: jsr _get_char
|
|
|
|
|
dex
|
|
|
|
|
jsr _put_char
|
|
|
|
|
txa
|
|
|
|
|
sep #SHORT_I
|
|
|
|
|
cpx a:_CH
|
|
|
|
|
rep #SHORT_I
|
|
|
|
|
bne :-
|
|
|
|
|
lda #' '
|
|
|
|
|
ldx #79
|
|
|
|
|
jsr _put_char
|
|
|
|
|
jsr _80store_off
|
|
|
|
|
rts
|
2019-07-01 17:33:44 +00:00
|
|
|
; set graphic rendition
|
|
|
|
|
sgr: lda ESCACC
|
|
|
|
|
cmp #10
|
|
|
|
|
beq mtoff
|
|
|
|
|
bcc :+
|
|
|
|
|
cmp #20
|
|
|
|
|
bcc mton
|
|
|
|
|
rts
|
|
|
|
|
: and #$01
|
|
|
|
|
clc
|
|
|
|
|
adc #$0E ; $0E = normal, $0F=inverse
|
|
|
|
|
tay
|
|
|
|
|
jsr _con_write
|
|
|
|
|
rts
|
|
|
|
|
mton: sty ESCNUM1
|
|
|
|
|
ldy #$1B
|
|
|
|
|
jsr _con_write
|
|
|
|
|
ldy #$0F
|
|
|
|
|
bra _con_write
|
|
|
|
|
mtoff: ldy #$18
|
|
|
|
|
jsr _con_write
|
|
|
|
|
ldy #$0E
|
|
|
|
|
bra _con_write
|
|
|
|
|
; scroll up
|
|
|
|
|
sd: ldy #$16
|
|
|
|
|
bra con_wr_n
|
|
|
|
|
su: ldy #$17
|
|
|
|
|
; fall-through
|
|
|
|
|
con_wr_n: sty ESCNUM1
|
|
|
|
|
: jsr _con_write
|
|
|
|
|
dec ESCACC
|
|
|
|
|
bmi :+
|
|
|
|
|
beq :+
|
|
|
|
|
ldy ESCNUM1
|
|
|
|
|
bra :-
|
|
|
|
|
: rts
|
|
|
|
|
.endproc
|
|
|
|
|
|
|
|
|
|
.proc _con_write
|
|
|
|
|
lda CON_WR
|
|
|
|
|
sta ECALL
|
|
|
|
|
tya
|
|
|
|
|
ldx #$C3 ; required by P1.1 I/F
|
|
|
|
|
ldy #$30
|
|
|
|
|
jmp _emulation_call
|
|
|
|
|
.endproc
|
|
|
|
|
|
|
|
|
|
.proc _cursor_off
|
|
|
|
|
ldy #$06
|
|
|
|
|
bra _con_write
|
|
|
|
|
.endproc
|
|
|
|
|
|
|
|
|
|
.proc _cursor_on
|
|
|
|
|
ldy #$05
|
|
|
|
|
bra _con_write
|
|
|
|
|
.endproc
|
|
|
|
|
|
|
|
|
|
.proc _goto_xy
|
|
|
|
|
phy
|
|
|
|
|
phx
|
|
|
|
|
ldy #$1E
|
|
|
|
|
jsr _con_write
|
|
|
|
|
pla ; x coord
|
|
|
|
|
clc
|
|
|
|
|
adc #32
|
|
|
|
|
tay
|
|
|
|
|
jsr _con_write
|
|
|
|
|
pla ; y coord
|
|
|
|
|
clc
|
|
|
|
|
adc #32
|
|
|
|
|
tay
|
|
|
|
|
bra _con_write
|
|
|
|
|
.endproc
|
|
|
|
|
|
|
|
|
|
; copy screen line, source base in X, dst base in Y
|
|
|
|
|
.proc _copy_line
|
|
|
|
|
phb
|
|
|
|
|
phy
|
|
|
|
|
phx
|
|
|
|
|
lda #38 ; # of chars MINUS ONE
|
|
|
|
|
mvn $00,$00 ; do main ram bytes
|
|
|
|
|
sep #SHORT_A
|
|
|
|
|
sta TXTPAGE2
|
|
|
|
|
rep #SHORT_A
|
|
|
|
|
plx
|
|
|
|
|
ply
|
|
|
|
|
lda #38
|
|
|
|
|
mvn $00,$00 ; do aux ram bytes
|
|
|
|
|
sep #SHORT_A
|
|
|
|
|
sta TXTPAGE1
|
|
|
|
|
rep #SHORT_A
|
|
|
|
|
plb
|
|
|
|
|
rts
|
|
|
|
|
.endproc
|
|
|
|
|
|
2019-07-09 19:31:40 +00:00
|
|
|
; with base address in _BASL and column # in X, set ZR to base address (long pointer)
|
|
|
|
|
; select appropriate text page, and set Y to byte offset of the column
|
|
|
|
|
.proc _scrn
|
|
|
|
|
lda a:_BASL
|
|
|
|
|
sta ZR
|
|
|
|
|
stz ZR+2
|
|
|
|
|
txa
|
|
|
|
|
lsr
|
|
|
|
|
tay
|
|
|
|
|
bcs :+
|
|
|
|
|
sep #SHORT_A
|
|
|
|
|
sta TXTPAGE2
|
|
|
|
|
rep #SHORT_A
|
|
|
|
|
: rts
|
|
|
|
|
.endproc
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
; get char in A at pos X assuming BASL/H are the calculated base address
|
|
|
|
|
; trashes Y, preserves X
|
|
|
|
|
; assumes data bank is 0 because that's where we are supposed to be
|
|
|
|
|
.proc _get_char
|
|
|
|
|
jsr _scrn
|
|
|
|
|
lda [ZR],y
|
|
|
|
|
and #$00FF
|
|
|
|
|
sep #SHORT_A
|
|
|
|
|
sta TXTPAGE1
|
|
|
|
|
rep #SHORT_A
|
|
|
|
|
rts
|
|
|
|
|
.endproc
|
|
|
|
|
|
|
|
|
|
; put char from A at pos X assuming BASL/H are the calculated base address
|
|
|
|
|
; assumes data bank is 0 because that's where we are supposed to be
|
|
|
|
|
; trashes Y, preserves A and X
|
|
|
|
|
.proc _put_char
|
|
|
|
|
pha
|
|
|
|
|
jsr _scrn
|
|
|
|
|
pla
|
|
|
|
|
sep #SHORT_A
|
|
|
|
|
sta [ZR],y
|
|
|
|
|
sta TXTPAGE1
|
|
|
|
|
rep #SHORT_A
|
|
|
|
|
rts
|
|
|
|
|
.endproc
|
|
|
|
|
|
2019-07-01 17:33:44 +00:00
|
|
|
.proc _80store_on
|
|
|
|
|
sep #SHORT_A
|
|
|
|
|
sta STO80_ON
|
|
|
|
|
rep #SHORT_A
|
|
|
|
|
rts
|
|
|
|
|
.endproc
|
|
|
|
|
|
|
|
|
|
.proc _80store_off
|
|
|
|
|
sep #SHORT_A
|
|
|
|
|
sta STO80_ON
|
|
|
|
|
rep #SHORT_A
|
|
|
|
|
rts
|
|
|
|
|
.endproc
|
|
|
|
|
|
|
|
|
|
.proc _sf_keyq
|
|
|
|
|
lda CON_ST
|
|
|
|
|
sta ECALL
|
|
|
|
|
lda #$01 ; check input status
|
|
|
|
|
ldx #$C3 ; required by P1.1 I/F
|
|
|
|
|
ldy #$30
|
|
|
|
|
jsr _emulation_call
|
|
|
|
|
ldy #$0000
|
|
|
|
|
bcc :+ ; if not ready
|
|
|
|
|
dey
|
|
|
|
|
: tya
|
|
|
|
|
plx
|
|
|
|
|
jsr _pushay
|
|
|
|
|
jmp _sf_success
|
|
|
|
|
.endproc
|
|
|
|
|
|
|
|
|
|
.proc _sf_key
|
|
|
|
|
lda CON_RD
|
|
|
|
|
sta ECALL
|
|
|
|
|
: ldx #$C3 ; required by P1.1 I/F
|
|
|
|
|
ldy #$30
|
|
|
|
|
jsr _emulation_call
|
|
|
|
|
and #$00FF
|
|
|
|
|
beq :- ; reject nulls
|
|
|
|
|
tay
|
|
|
|
|
lda #$0000
|
|
|
|
|
plx
|
|
|
|
|
jsr _pushay
|
|
|
|
|
jmp _sf_success
|
|
|
|
|
.endproc
|
|
|
|
|
|
|
|
|
|
.proc _sf_fcode ; none for now
|
|
|
|
|
lda #$0000
|
|
|
|
|
tay
|
|
|
|
|
plx
|
|
|
|
|
jsr _pushay
|
|
|
|
|
jmp _sf_success
|
|
|
|
|
.endproc
|
|
|
|
|
|
|
|
|
|
.proc _sf_reset_all
|
|
|
|
|
lda #Reset
|
|
|
|
|
sta ECALL
|
|
|
|
|
inc PwrByte
|
|
|
|
|
jsr _emulation_call
|
|
|
|
|
jmp _sf_fail
|
|
|
|
|
.endproc
|
