SDCC

SDCC is the toolchain used in MSXGL to compile, assemble and link the sources files.

Assembler

The assembler, sdasz80, is based on ASxxxx cross assembles.

sdasz80 syntax is almost standard except for:

• Define instructions numeral values: must be prefixed with # character.
• Define directive: must be prefix with . character.
• Access to IX and IY register using offset: offset have to be write before the register name into parentheses.

Standard	sdasz80
; Numeral ld a, 100 and 01111100b ld lh, 1234h ; Directive db 100 dw 1234h ; IX/IY offset ld e, iy[0] ld d, iy[1]	; Numeral ld a, #100 and #0b01111100 ld lh, #0x1234 ; Directive .db 100 .dw 0x1234 ; IX/IY offset ld e, 0(iy) ld d, 1(iy)

Links

For more information:

• SDCC documentation
• ASxxxx documentation