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https://github.com/a2-4am/4live.git
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Merge pull request #21 from peterferrie/master
add memory-search option
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4am
GitHub
commit
ed27b90a7f
188
src/4live.a
188
src/4live.a
@ -1,6 +1,6 @@
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;
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; 4LIVE
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; Copyright (c) 2016-7 by 4am && qkumba
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; Copyright (c) 2016-8 by 4am && qkumba
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; 100% open source, see LICENSE file
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;
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!cpu 6502
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@ -8,6 +8,7 @@
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;user-defined
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HOTKEY = $80 ; CTRL-@
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FINDKEY = $86 ; CTRL-F
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HIGHLIGHTKEY = $82 ; CTRL-B
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CLEARKEY = $83 ; CTRL-C
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PREVPAGEKEY = $92 ; CTRL-R
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@ -17,6 +18,7 @@
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VERBOSE = $0 ; set to 1 to show memory usage during build
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;
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!addr PROMPT = $33
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!addr KSWL = $38
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!addr KSWH = $39
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!addr FCBFOP = $40
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@ -30,9 +32,12 @@
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!addr LCBANK2 = $C083
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!addr ROMIN1 = $C089
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!addr LCBANK1 = $C08B
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!addr SCRN2P2 = $F87B ;SCRN2 +2
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!addr PRNTYX = $F940
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!addr APLDETECT = $FBB3 ;#06 if IIe or later
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!addr KEYIN = $FD1B
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!addr RDCHAR = $FD35
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!addr CROUT = $FD8E
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!addr COUT = $FDED
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;private arbitrary addresses, shared with DOS to avoid conflict
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@ -58,6 +63,8 @@
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SPACE = $A0
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DELETE = $FF
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WILDCARD = $97
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IOBSLOT = 1
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IOBDRIVE = 2
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NAMELEN = 30
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@ -72,8 +79,8 @@
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POSRDWRRANGE = 4
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WIDTH = 40
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HEIGHT = 24
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LDRBASE = $2E9
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INSTALLBUFFER = $232 ; yes, the overlay overwrites the loader...
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LDRBASE = $2DB
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INSTALLBUFFER = $21E ; yes, the overlay overwrites the loader...
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; see also "warning!" below
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SWAPBUFFER = $900 ; (LoadSaveEnd - LoadSaveStart) size
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; needed by Diversi-DOS, must be page-aligned
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@ -108,12 +115,8 @@ LdrStart
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sta FileDrive
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dey ;ldy #IOBSLOT
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lda (OPSRC1L), y
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lsr
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lsr
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lsr
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lsr
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jsr SCRN2P2
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sta FileSlot
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dey ;ldy #00
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;open self and read first overlay
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@ -231,6 +234,18 @@ BankInRAM1
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bit LCBANK1
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rts
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PrintAddr
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bit ROMIN1
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jsr PRNTYX
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PrintCR
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lda #RETURN
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PrintChar
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bit ROMIN1
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jsr COUT
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bne BankInRAM1
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;read file content into memory
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;with swapping of the memory contents in Diversi-DOS,
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;in order to preserve the original memory region
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@ -444,11 +459,19 @@ GetKey
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cmp #HOTKEY
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;yes -> let's do that
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beq +
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;memory search?
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cmp #FINDKEY
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;no -> return to DOS
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bne ReuseRts
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jsr BankInRAM1
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+ jsr BankInRAM1
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jsr RunFromBankedRAM
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lda ROMIN1
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@ -475,6 +498,9 @@ InstallEnd
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BankedCopyStart
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!pseudopc $D000 {
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RunFromBankedRAM
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cmp #FINDKEY
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beq FindChars
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;preserve X across calls
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;it's important for DOS
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@ -507,6 +533,148 @@ RunFromBankedRAM
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tax
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rts
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FindChars
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sty CharCount + 1
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ldx #0
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ldy #0
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ConvertChars
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cmp #$10
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bcs NextChar
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asl
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asl
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asl
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asl
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sta OPSRC1L
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jsr Char2Nib
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ora OPSRC1L
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sta SECTORBUFFER, y
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iny
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NextChar
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jsr Char2Nib
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CharCount
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cpx #0 ;self-modified
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bcc ConvertChars
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jsr PrintCR
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dex
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beq CancelLine
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jsr SearchMemory
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CancelLine
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ldx #0
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lda PROMPT
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tay ;in case Y was zero
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jmp PrintChar
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SearchMemory
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lda DOSBASE
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sta .endvalue+1
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lda #8
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sta search+2
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sty match_size1+1
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sty match_size2+1
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; fetch last byte to improve search speed
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dey
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match_buffer1
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lda SECTORBUFFER,y
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sta check_byte1+1
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sta check_byte2+1
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; set low part of initial search position
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sty cont_search+1
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lda #<cont_search-branch_cont-2
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sta branch_cont+1
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; search...
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cont_search
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ldy #$d1 ; modified at runtime
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search
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lda $d100,y ; modified at runtime
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iny
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beq check_end
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check_byte1
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cmp #$d1 ; modified at runtime
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bne search
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; point to first byte
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sty cont_search+1
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check_match
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tya
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match_size1
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sbc #$d1 ; modified at runtime
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sta match_buffer2+1
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lda search+2
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sbc #$00
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sta match_buffer2+2
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ldy #$00
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match_all
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lda SECTORBUFFER,y
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cmp #WILDCARD
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beq found_wild
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match_buffer2
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cmp $d1d1,y ; modified at runtime
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branch_cont
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bne cont_search
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found_wild
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iny
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match_size2
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cpy #$d1 ; modified at runtime
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bne match_all
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; point to start of match
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ldx match_buffer2+1
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ldy match_buffer2+2
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jsr PrintAddr
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tya
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bne branch_cont
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; cold path
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check_end
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inc search+2
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ldx search+2
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.endvalue
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cpx #$D1
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bne check_byte1
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ldx #<all_done_set-branch_cont-2
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stx branch_cont+1
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check_byte2
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cmp #$d1 ; modified at runtime
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beq check_match
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all_done_set
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;fall through
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Char2Nib
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lda $0200, x
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inx
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sec
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sbc #$B0
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cmp #$0A
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bcc +
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sbc #7
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+ rts
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ScrollEditBufferIn
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ldy #(<(ScrollParmsDown - ScrollParms) - 1)
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jsr SetScrollLine
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@ -1526,7 +1694,7 @@ SecondLine
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!fill WIDTH * 7, SPACE
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!text " 4LIVE by 4am && qkumba "
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!fill WIDTH, SPACE
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!text " Revision 04 / Serial number 170123 "
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!text " Revision 05 / Serial number 180410 "
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!fill WIDTH * 2, SPACE
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!text " https://github.com/a2-4am/4live "
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!fill WIDTH * 9, SPACE
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