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avra: implement BR*
Getting good! still advancing on ps2ctl in sms/kbd and still matching reference binary.
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cdddfdefae
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3
blk/668
3
blk/668
@ -4,5 +4,4 @@
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PC - DUP 0< IF 0x800 + _r7ffc 0x800 OR ELSE _r7ffc THEN ;
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PC - DUP 0< IF 0x800 + _r7ffc 0x800 OR ELSE _r7ffc THEN ;
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: RJMP _raddr12 0xc000 OR ;
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: RJMP _raddr12 0xc000 OR ;
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: RCALL _raddr12 0xd000 OR ;
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: RCALL _raddr12 0xd000 OR ;
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: RJMP, RJMP A,, ;
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: RJMP, RJMP A,, ; : RCALL, RCALL A,, ;
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: RCALL, RCALL A,, ;
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22
blk/669
22
blk/669
@ -1,12 +1,12 @@
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( L1 LBL! .. L1 @ RJMP, )
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( a -- k7, absolute addr a, relative to PC in a k7 addr )
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: LBL! ( l -- ) PC SWAP ! ;
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: _r3fc DUP 0x3f > IF _oor THEN ;
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( L1 FLBL, .. RJMPOP L1 FLBL! )
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: _raddr7
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: FLBL, ( l -- ) LBL! 0 A,, ;
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PC - DUP 0< IF 0x40 + _r3fc 0x40 OR ELSE _r3fc THEN ;
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: FLBL! ( l opw -- )
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: _brbx ( a b op -- a ) OR SWAP _raddr7 3 LSHIFT OR ;
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( warning: l is a PC offset, not a mem addr! )
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: BRBC 0xf400 _brbx ; : BRBS 0xf000 _brbx ; : BRCC 0 BRBC ;
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SWAP @ 2 * ORG @ + PC 1- H@ ( opw addr tgt hbkp )
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: BRCS 0 BRBS ; : BREQ 1 BRBS ; : BRNE 1 BRBC ; : BRGE 4 BRBC ;
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ROT HERE ! ( opw tgt hbkp ) SWAP ROT EXECUTE H@ ! ( hbkp )
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: BRHC 5 BRBC ; : BRHS 5 BRBS ; : BRID 7 BRBC ; : BRIE 7 BRBS ;
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HERE ! ;
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: BRLO BRCS ; : BRLT 4 BRBS ; : BRMI 2 BRBS ; : BRPL 2 BRBC ;
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: FRJMP! ( l -- ) ['] RJMP FLBL! ;
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: BRSH BRCC ; : BRTC 6 BRBC ; : BRTS 6 BRBS ; : BRVC 3 BRBC ;
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: FRCALL! ( l -- ) ['] RCALL FLBL! ;
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: BRVS 3 BRBS ;
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11
blk/670
Normal file
11
blk/670
Normal file
@ -0,0 +1,11 @@
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( L1 LBL! .. L1 ' RJMP LBL, )
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: LBL! ( l -- ) PC SWAP ! ;
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: LBL, ( l op -- ) SWAP @ 1- SWAP EXECUTE A,, ;
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( L1 FLBL, .. L1 ' RJMP FLBL! )
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: FLBL, ( l -- ) LBL! 0 A,, ;
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: FLBL! ( l opw -- )
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( warning: l is a PC offset, not a mem addr! )
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SWAP @ 2 * ORG @ + PC 1- H@ ( opw addr tgt hbkp )
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ROT HERE ! ( opw tgt hbkp ) SWAP ROT EXECUTE H@ ! ( hbkp )
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HERE ! ;
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@ -40,6 +40,7 @@ Z: pointer to the next scan code to push to the 595 )
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0x35 CONSTANT MCUCR
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0x35 CONSTANT MCUCR
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0x33 CONSTANT TCCR0B
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0x33 CONSTANT TCCR0B
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0x3b CONSTANT GIMSK
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0x3b CONSTANT GIMSK
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0x38 CONSTANT TIFR
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0x16 CONSTANT PINB
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0x16 CONSTANT PINB
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0x17 CONSTANT DDRB
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0x17 CONSTANT DDRB
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0x18 CONSTANT PORTB
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0x18 CONSTANT PORTB
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@ -56,13 +57,13 @@ L2 FLBL, ( hdlINT0 )
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( Read DATA and set GPIOR0/0 if high. Then, set flag T.
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( Read DATA and set GPIOR0/0 if high. Then, set flag T.
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no SREG fiddling because no SREG-modifying instruction )
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no SREG fiddling because no SREG-modifying instruction )
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L2 FRJMP! ( hdlINT0 )
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L2 ' RJMP FLBL! ( hdlINT0 )
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PINB DATA SBIC,
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PINB DATA SBIC,
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GPIOR0 0 SBI,
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GPIOR0 0 SBI,
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SET,
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SET,
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RETI,
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RETI,
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L1 FRJMP! ( main )
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L1 ' RJMP FLBL! ( main )
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16 RAMEND 0xff AND LDI,
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16 RAMEND 0xff AND LDI,
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SPL 16 OUT,
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SPL 16 OUT,
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16 RAMEND 8 RSHIFT LDI,
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16 RAMEND 8 RSHIFT LDI,
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@ -95,4 +96,21 @@ DDRB LR SBI,
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SEI,
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SEI,
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L1 LBL! ( loop )
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L1 LBL! ( loop )
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L2 FLBL, ( BRTS processbit. flag T set? we have a bit to
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process )
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28 ( YL ) 30 ( ZL ) CP, ( if YL == ZL, buf is empty )
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L3 FLBL, ( BRNE sendTo164. YL != ZL? buf has data )
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( nothing to do. Before looping, let's check if our
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communication timer overflowed. )
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16 TIFR IN,
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16 1 ( TOV0 ) SBRC,
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L4 FLBL, ( RJMP processbitReset, timer0 overflow? reset )
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( Nothing to do for real. )
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L1 ' RJMP LBL, ( loop )
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( Process the data bit received in INT0 handler. )
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L2 ' BRTS FLBL! ( processbit )
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19 GPIOR0 IN, ( backup GPIOR0 before we reset T )
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19 0x1 ANDI, ( only keep the first flag )
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GPIOR0 0 CBI,
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CLT, ( ready to receive another bit )
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