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Block explorer upgraded to block editor!
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2
blk/000
2
blk/000
@ -4,7 +4,7 @@ This is a Forth-style filesystems which is very simple. It is a
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list of 1024 bytes block, organised in 16 lines of 64 columns
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list of 1024 bytes block, organised in 16 lines of 64 columns
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each. You refer to blocks by numbers. You show them with LIST.
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each. You refer to blocks by numbers. You show them with LIST.
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You interpret them with LOAD. For a convenient way to browse
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You interpret them with LOAD. For a convenient way to browse
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blocks, see Block Explorer at B100.
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blocks, see Block editor at B100.
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Conventions: When you see "(cont.)" at the bottom right of a
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Conventions: When you see "(cont.)" at the bottom right of a
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block, it means that the next block continues the same kind of
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block, it means that the next block continues the same kind of
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2
blk/001
2
blk/001
@ -1,4 +1,4 @@
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MASTER INDEX
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MASTER INDEX
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3 Usage 30 Dictionary
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3 Usage 30 Dictionary
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70 Implementation notes 100 Block explorer
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70 Implementation notes 100 Block editor
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18
blk/100
18
blk/100
@ -1,10 +1,16 @@
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Block explorer
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Block editor
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This is an application to conveniently browse the contents of
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This is an application to conveniently browse the contents of
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the disk blocks. You can launch it with "102 LOAD".
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the disk blocks and edit them. You can load it with "102 LOAD".
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USAGE: When loaded, the Forth interpreter is replaced by the
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Browse mode: If you execute BROWSE, the Forth interpreter is
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explorer interpreter. Typing "Q" quits the program.
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replaced by browser's loop. Typing "Q" quits the browser.
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Typing a decimal number followed by space or return lists the
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In this mode, typing a decimal number followed by space or
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contents of that block. B for previous block, N for next.
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return lists the contents of that block. B for previous block,
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N for next.
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When not in browse mode, your prompt is a regular Forth prompt
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with editor words loaded.
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(cont.)
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2
blk/101
Normal file
2
blk/101
Normal file
@ -0,0 +1,2 @@
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T ( n -- ): select line n for editing.
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P xxx(return): put typed line on selected line.
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19
blk/102
19
blk/102
@ -1,14 +1,13 @@
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103 LOAD
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103 LOAD 104 LOAD
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VARIABLE _K
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: PGM
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: BROWSE
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100 _LIST
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100 _LIST
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BEGIN
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BEGIN
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KEY
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KEY CASE
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DUP 'Q' = IF DROP EXIT THEN
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'Q' OF DROP EXIT ENDOF
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DUP 58 ( '9'+1 ) < IF _NUM
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'B' OF B ENDOF
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ELSE
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'N' OF N ENDOF
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_K ! _K (find) IF EXECUTE THEN
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_NUM
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THEN
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ENDCASE
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AGAIN
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AGAIN
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; PGM
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;
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5
blk/103
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blk/103
@ -5,5 +5,6 @@ VARIABLE ACC
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IF _LIST 0 THEN
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IF _LIST 0 THEN
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ACC !
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ACC !
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;
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;
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: B BLK> @ 1- DUP BLK> ! _LIST ;
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: L BLK> @ _LIST ;
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: N BLK> @ 1+ DUP BLK> ! _LIST ;
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: B BLK> @ 1- BLK> ! L ;
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: N BLK> @ 1+ BLK> ! L ;
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13
blk/104
Normal file
13
blk/104
Normal file
@ -0,0 +1,13 @@
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( Line numbers for the user are 1-based, but in code, they're
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0-based. )
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VARIABLE EDPOS
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: _bpos 64 * BLK( + ;
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: T 1- DUP EDPOS ! _bpos (print) CRLF ;
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: P
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EDPOS @ _bpos C<
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64 0 DO ( bpos c )
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DUP 0xd = IF DROP 0 THEN
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2DUP SWAP I + C!
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DUP IF DROP C< THEN
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LOOP
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;
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@ -20,7 +20,7 @@
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;
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;
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: BLK@
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: BLK@
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DUP BLK> = IF DROP EXIT THEN
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DUP BLK> @ = IF DROP EXIT THEN
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DUP BLK> ! BLK@* @ EXECUTE
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DUP BLK> ! BLK@* @ EXECUTE
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;
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;
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