SDCC

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

Supported version:

• Embedded: SDCC 4.2.0
• Tested: SDCC 4.4.0 RC2

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 hl, 1234h ; Directive db 100 dw 1234h ; IX/IY offset ld e, iy[0] ld d, iy[1]	; Numeral ld a, #100 and #0b01111100 ld hl, #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