collapseos/blk/311

( Low-level part of ROLL. Example:
  "1 2 3 4 4 (roll)" --> "1 3 4 4". No sanity checks, never
  call with 0. )
CODE (roll)
    HL POP,
    B H LDrr,
    C L LDrr,
    SP ADDHLd,
    HL INCd,
    D H LDrr,
    E L LDrr,
    HL DECd,
    HL DECd,
    LDDR,
;CODE
Copy boot.z80 to blkfs 2020-04-22 21:19:12 -04:00			`( Low-level part of ROLL. Example:`
			`"1 2 3 4 4 (roll)" --> "1 3 4 4". No sanity checks, never`
			`call with 0. )`
			`CODE (roll)`
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. 2020-06-27 22:01:56 -04:00			`HL POP,`
Copy boot.z80 to blkfs 2020-04-22 21:19:12 -04:00			`B H LDrr,`
			`C L LDrr,`
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. 2020-06-27 22:01:56 -04:00			`SP ADDHLd,`
			`HL INCd,`
Copy boot.z80 to blkfs 2020-04-22 21:19:12 -04:00			`D H LDrr,`
			`E L LDrr,`
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. 2020-06-27 22:01:56 -04:00			`HL DECd,`
			`HL DECd,`
Copy boot.z80 to blkfs 2020-04-22 21:19:12 -04:00			`LDDR,`
			`;CODE`