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avra: add SKIP, .. AT,

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Will change to IF, .. THEN, but I need a way to easily reverse a
BR op. But from this commit, the translation of sms/kbd/ps2ctl.asm
is complete! perfect binary match!
This commit is contained in:
Virgil Dupras 2020-05-19 10:19:37 -04:00
parent 8ca85abfbd
commit 8bbd29d37d
2 changed files with 33 additions and 6 deletions
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13
blk/671
View File

@ -1,13 +1,14 @@
( L1 LBL! .. L1 ' RJMP LBL, )
: LBL! ( l -- ) PC SWAP ! ;
: LBL, ( l op -- ) SWAP @ 1- SWAP EXECUTE A,, ;
( L1 FLBL, .. L1 ' RJMP FLBL! )
: FLBL, ( l -- ) LBL! 0 A,, ;
: FLBL! ( l opw -- )
( warning: l is a PC offset, not a mem addr! )
SWAP @ 2 * ORG @ + PC 1- H@ ( opw addr tgt hbkp )
: SKIP, PC 0 A,, ;
: AT, ( opw pc )
( warning: pc is a PC offset, not a mem addr! )
2 * ORG @ + PC 1- H@ ( opw addr tgt hbkp )
ROT HERE ! ( opw tgt hbkp ) SWAP ROT EXECUTE H@ ! ( hbkp )
HERE ! ;
( L1 FLBL, .. L1 ' RJMP FLBL! )
: FLBL, ( l -- ) LBL! 0 A,, ;
: FLBL! ( l opw -- ) SWAP @ AT, ;
: BEGIN, PC ;
: AGAIN, ( op ) SWAP 1- SWAP EXECUTE A,, ;

26
recipes/sms/kbd/ps2ctl.fs
View File

@ -297,3 +297,29 @@ RET,
L8 ' RCALL FLBL! ( checkBoundsY )
( Check that Y is within bounds, reset to SRAM_START if not. )
28 ( YL ) TST,
' BREQ SKIP, RET, ( not zero, nothing to do ) AT,
( YL is zero. Reset Z )
29 ( YH ) CLR,
28 ( YL ) SRAM_START 0xff AND LDI,
RET,
L3 ' RCALL FLBL! ( checkBoundsZ )
( Check that Z is within bounds, reset to SRAM_START if not. )
30 ( ZL ) TST,
' BREQ SKIP, RET, ( not zero, nothing to do ) AT,
( ZL is zero. Reset Z )
31 ( ZH ) CLR,
30 ( ZL ) SRAM_START 0xff AND LDI,
RET,
L5 ' RCALL FLBL! L6 ' RCALL FLBL! ( checkParity )
( Counts the number of 1s in r19 and set r16 to 1 if there's an
even number of 1s, 0 if they're odd. )
16 1 LDI,
BEGIN,
19 LSR,
' BRCC SKIP, 16 INC, ( carry set? we had a 1 ) AT,
19 TST, ( is r19 zero yet? )
' BRNE AGAIN, ( no? loop )
16 0x1 ANDI,
RET,