mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-06 02:31:01 +11:00
a7dcb522c2
The 1 byte limitation has been effective for a while now, but I hadn't made the move yet, I wanted to see if the limitation would cause me problems. It doesn't. Doing this now slightly facilitates the IY->BC move in z80. Bootstrapping: if you try to recreate the CVM binary from the previous commit with this code, you'll have bootstrapping problems. The first bootstrap will compile a binary with 2-bytes wide cells but branching conditionals that yields 1-byte cells. That's bad. I got around the issue by temporarily inserting a "397 399 LOADR" instruction in cvm/xcomp.fs, right before the xcomp overrides. This way, I force 1-byte cells everywhere on the first compiliation, which then allows me to apply the logic change in cvm/vm.c and have a properly running binary.
10 lines
303 B
Plaintext
10 lines
303 B
Plaintext
: LIT< 0x2b ( s ) , WORD DUP C@ 1+ MOVE, ; IMMEDIATE
|
|
: BEGIN H@ ; IMMEDIATE
|
|
: AGAIN 0x3b ( br ) , H@ - _bchk C, ; IMMEDIATE
|
|
: UNTIL 0x3f ( ?br ) , H@ - _bchk C, ; IMMEDIATE
|
|
: [ INTERPRET ; IMMEDIATE
|
|
: ] R> DROP ;
|
|
: COMPILE ' LITN ['] , , ; IMMEDIATE
|
|
: [COMPILE] ' , ; IMMEDIATE
|
|
: ['] ' LITN ; IMMEDIATE
|