collapseos/recipes/trs80/blk/603

CODE (key)
    A 0x01 LDri, ( @KEY )
    0x28 RST,
    PUSHA,
;CODE
CODE (emit) EXX, ( protect BC )
    BC POP, ( c == @DSP arg ) chkPS,
    A 0x02 LDri, ( @DSP )
    0x28 RST,
EXX, ( unprotect BC ) ;CODE
CODE AT-XY EXX, ( protect BC )
    DE POP, H E LDrr, ( Y )
    DE POP, L E LDrr, ( X ) chkPS,
    A 0x0f LDri, ( @VDCTL ) B 3 LDri, ( setcur )
    0x28 RST,
EXX, ( unprotect BC ) ;CODE
Add a layer of indirection for KEY 2020-05-03 00:37:37 +10:00			`CODE (key)`
z80a: make mnemonic names more uniform across assemblers Initially, I used the same letters as those used in the z80 ref docs, but it makes the different assemblers harder to use than they should. Having consistent "argtype" rules across assemblers should help. 2020-06-28 12:01:56 +10:00			`A 0x01 LDri, ( @KEY )`
			`0x28 RST,`
trs80: implement AT-XY Also, I've run VE on the TRS-80 for the first time! It doesn't work well though. Screen is mostly blank all the time. I removed instructions from the recipe which became obsolete when Collapse OS became 100% bootstrapped. Also, I've updated instructions to change the NL override which is necessary for blkup to work. 2020-06-08 00:37:00 +10:00			`PUSHA,`
recipes/trs80: making progress on floppy drivers 2020-05-01 06:10:35 +10:00			`;CODE`
z80: protect or avoid BC wherever it's used For the IY->BC move, of course. 2020-07-06 13:12:17 +10:00			`CODE (emit) EXX, ( protect BC )`
z80a: make mnemonic names more uniform across assemblers Initially, I used the same letters as those used in the z80 ref docs, but it makes the different assemblers harder to use than they should. Having consistent "argtype" rules across assemblers should help. 2020-06-28 12:01:56 +10:00			`BC POP, ( c == @DSP arg ) chkPS,`
			`A 0x02 LDri, ( @DSP )`
			`0x28 RST,`
z80: protect or avoid BC wherever it's used For the IY->BC move, of course. 2020-07-06 13:12:17 +10:00			`EXX, ( unprotect BC ) ;CODE`
			`CODE AT-XY EXX, ( protect BC )`
z80a: make mnemonic names more uniform across assemblers Initially, I used the same letters as those used in the z80 ref docs, but it makes the different assemblers harder to use than they should. Having consistent "argtype" rules across assemblers should help. 2020-06-28 12:01:56 +10:00			`DE POP, H E LDrr, ( Y )`
			`DE POP, L E LDrr, ( X ) chkPS,`
			`A 0x0f LDri, ( @VDCTL ) B 3 LDri, ( setcur )`
			`0x28 RST,`
z80: protect or avoid BC wherever it's used For the IY->BC move, of course. 2020-07-06 13:12:17 +10:00			`EXX, ( unprotect BC ) ;CODE`