recipes/trs80: self-hosting

Also, made LIST properly handle full 64-chars lines not ending with
a null or CR. Previously, such a line would be accompanied by its
following line, duplicating that line's output.

blk/048

@@ -1,7 +1,9 @@
 Return Stack
 
 >R          n -- R:n        Pops PS and push to RS
+2>R         x y -- R:x y    Equivalent to SWAP >R >R
 R>          R:n -- n        Pops RS and push to PS
+2R>         R:x y -- x y    Equivalent to R> R> SWAP
 I           -- n            Copy RS TOS to PS
 I'          -- n            Copy RS second item to PS
 J           -- n            Copy RS third item to PS

blk/101

@@ -2,7 +2,7 @@ T ( n -- ): select line n for editing.
 P xxx: put typed line on selected line.
 U xxx: insert typed line on selected line.
 F xxx: find typed string in block.
-
+I xxx: insert typed string at cursor
 
 
 

blk/102

@@ -1,5 +1,5 @@
 50 LOAD+ ( B152, extras )
-1 5 LOADR+
+1 6 LOADR+
 
 : BROWSE
     0 ACC ! L

blk/105

@@ -1,5 +1,5 @@
 : _type ( buf -- )
-    C< DUP 0xd = IF DROP EXIT THEN OVER DUP _zbuf ( c a )
+    C< DUP 0xd = IF 2DROP EXIT THEN OVER DUP _zbuf ( c a )
     BEGIN ( c a )
         C!+ C< SWAP
     OVER 0x0d = UNTIL ( c a ) C! ;

blk/108

@@ -0,0 +1,15 @@
+: _ilen ( length of str in IBUF )
+    IBUF BEGIN C@+ EOL? UNTIL IBUF - 1- ;
+: I
+    IBUF _type EDPOS @ 64 /MOD ( cno lno )
+    1+ 64 * _cpos ( cno next-line-ptr )
+    SWAP 63 -^ _ilen ( nlp nb-of-chars-to-move ilen )
+    2DUP > IF
+        SWAP OVER - 1+ ( nlp ilen nbc ) 0 DO ( a ilen )
+            SWAP 1- 2DUP -^ ( ilen a-1 a-ilen-1 ) C@ OVER C!
+            SWAP ( a ilen )
+        LOOP
+    ELSE DROP ( ilen becomes nbc )
+    THEN
+    SWAP DROP IBUF EDPOS @ _cpos ROT MOVE
+;

blk/326

@@ -1,13 +1,17 @@
 CODE >R
-    HL POPqq,
-    chkPS,
-    ( 17 == pushRS )
-    17 BCALL,
+    HL POPqq, chkPS,
+    17 BCALL, ( 17 == pushRS )
+;CODE
+CODE 2>R
+    DE POPqq, HL POPqq, chkPS,
+    17 BCALL, ( 17 == pushRS ) EXDEHL, 17 BCALL,
 ;CODE
-
 CODE R>
-    ( 20 == popRS )
-    20 BCALL,
+    20 BCALL, ( 20 == popRS )
     HL PUSHqq,
 ;CODE
+CODE 2R>
+    20 BCALL, ( 20 == popRS ) EXDEHL, 20 BCALL,
+    HL PUSHqq, DE PUSHqq,
+;CODE
 

blk/431

@@ -3,11 +3,8 @@
 : / /MOD SWAP DROP ;
 : MOD /MOD DROP ;
 
-( In addition to pushing H@ this compiles 2 >R so that loop
+( In addition to pushing H@ this compiles 2>R so that loop
   variables are sent to PS at runtime )
-: DO
-    COMPILE SWAP COMPILE >R COMPILE >R
-    H@
-; IMMEDIATE
+: DO COMPILE 2>R H@ ; IMMEDIATE
 
 

blk/432

@@ -12,5 +12,5 @@
 : LOOP
     COMPILE _ COMPILE (?br)
     H@ - ,
-    COMPILE R> COMPILE DROP COMPILE R> COMPILE DROP
+    COMPILE 2R> COMPILE 2DROP
 ; IMMEDIATE

blk/456

@@ -1,10 +1,12 @@
 : .2 DUP 10 < IF SPC THEN . ;
-
+: EOL? ( c -- f ) DUP 0xd = SWAP NOT OR ;
 : LIST
     BLK@
     16 0 DO
         I 1+ .2 SPC
-        64 I * BLK( + (print)
+        64 I * BLK( + DUP 64 + SWAP DO
+            I C@ DUP EOL? IF DROP LEAVE ELSE EMIT THEN
+        LOOP
         NL
     LOOP
 ;

recipes/trs80/README.md

@@ -276,31 +276,47 @@ you're already supposed to know that one). Then, run `BYE` to return to TRSDOS
 just halting). Then, you can dump memory to floppy as you already did for
 `RECV`.
 
-## Configuration
+## Sending blkfs to floppy
 
-In addition to the generic basic shell, this build of Collapse OS has support
-for floppy drive `:1` as a block device (mapped to device `0`). Block device
-commands work as expected.
+As it is, your system fully supports reading and writing to floppy drive 1. It
+also had `*CL<` to read a char from `*cl` and `*CL>` to emit a char to `*cl`.
 
-In addition to this, there is a `flush` command to ensure that dirty buffers are
-synced to disk. Make sure you run this after a write operation or before
-swapping disks.
+That's all you need to have a full Collapse OS with access to disk blocks.
 
-On top of that, there's CFS support builtin. To enable a FS, type `fson` while
-the active block device is properly placed (you can initialize a new FS by
-writing `CFS\0\0\0\0` to the disk). If it doesn't error out, commands like
-`fls` and `fnew` will work. Don't forget to flush when you're finished :)
+First, make sure your floppies are formatted. Collapse OS is currently
+hardcoded to single side and single density, which means there's a limit of 100
+blocks per disk.
 
-There is also a custom `recv` command that does the same "ping pong" as in
-`recv.asm`, but once. It puts the result in `A`. This can be useful to send down
-a raw CFS: you just need a while loop that repeatedly call `recv:putb a`.
+You'll need to send those blocks through RS-232. Begin by taking over the
+prompt:
 
-## Assembling programs
+    ' *CL> 0x53 RAM+ !
+    ' *CL< 0x55 RAM+ !
 
-Running `make` will yield a `floppy.cfs` file that you can dump on a disk. This
-CFS contains a properly configured `zasm` as well as a test `hello.asm` file.
+See B80 for details about those RAM offsets. Your serial link now has the
+prompt. Now, you can use `/tools/blkup` to send a disk's contents. First, 
+extract the first 100 blocks from blkfs:
+
+    dd if=emul/blkfs bs=1024 count=100 > d1
+
+Now, insert your formatted disk in drive 1 and push your blocks:
+
+    tools/blkup /dev/ttyUSB0 0 d1
+
+It takes a while, but you will end up having your first 100 blocks on floppy!
+Go ahead, `LIST` around. Then, repeat for other disks.
+
+## Floppy organisation
+
+Making blkfs span multiple disk is a bit problematic with regards to absolute
+block references in the code. You'll need to work a bit to design your very
+own Collapse OS floppy set. See Usage guide (B3) for details.
+
+## Self-hosting
+
+As it is, your installment of Collapse OS is self-hosting using instructions
+very similar to `recipes/rc2014/selhost`. The difference is that instead of
+writing the binary you have in memory to EEPROM, you'll quit to TRSDOS with
+`BYE` and use TRSDOS' `DUMP` utility to save to disk like you already did
+before.
 
-By mounting this CFS (running `fson` with the active device properly placed),
-you can assemble and run a binary from `hello.asm` in the same way that you
-would in any CFS-enabled shell. You'll then see those sweet "Assembled from a
-TRS-80" words!