collapseos/blk/494

: LINES 24 ; : COLS 80 ;
CODE BYE
    HL 0 LDdn,
    A 0x16 LDri, ( @EXIT )
    0x28 RST,
CODE @DCSTAT ( drv -- f ) EXX, ( protect BC )
    BC POP,
    chkPS,
    A 0x28 LDri, ( @DCSTAT )
    0x28 RST,
    PUSHZ,
EXX, ( unprotect BC ) ;CODE
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			`: LINES 24 ; : COLS 80 ;`
			`CODE BYE`
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			`HL 0 LDdn,`
			`A 0x16 LDri, ( @EXIT )`
			`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			`CODE @DCSTAT ( drv -- f ) 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,`
recipes/trs80: making progress on floppy drivers 2020-05-01 06:10:35 +10:00			`chkPS,`
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 0x28 LDri, ( @DCSTAT )`
			`0x28 RST,`
recipes/trs80: making progress on floppy drivers 2020-05-01 06:10:35 +10:00			`PUSHZ,`
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`