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Diffstat (limited to '')
| -rw-r--r-- | sw/z80/drivers/build/pio.asm (renamed from sw/z80_tests/usart/build/pio.asm) | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/sw/z80_tests/usart/build/pio.asm b/sw/z80/drivers/build/pio.asm index ee1fcc6..3045492 100644 --- a/sw/z80_tests/usart/build/pio.asm +++ b/sw/z80/drivers/build/pio.asm @@ -13,6 +13,8 @@ .globl _pio_set_mode .globl _pio_set_interrupts .globl _pio_set_interrupts_mask + .globl _pio_read + .globl _pio_write ;-------------------------------------------------------- ; special function registers ;-------------------------------------------------------- @@ -185,6 +187,44 @@ _pio_set_interrupts_mask:: ld (hl),c ;pio.c:39: _pio_control(port, mask); ret +;pio.c:42: uint8_t pio_read(int port) +; --------------------------------- +; Function pio_read +; --------------------------------- +_pio_read:: +;pio.c:44: return *(pio_port + port); + ld hl,#2 + add hl,sp + ld iy,#_pio_port + ld a,0 (iy) + add a, (hl) + ld c,a + ld a,1 (iy) + inc hl + adc a, (hl) + ld b,a + ld a,(bc) + ld l,a + ret +;pio.c:47: void pio_write(int port, uint8_t data) +; --------------------------------- +; Function pio_write +; --------------------------------- +_pio_write:: +;pio.c:49: _pio_data(port, data); + ld hl, #4+0 + add hl, sp + ld c, (hl) + pop de + pop hl + push hl + push de +;pio.c:8: *(pio_port + port) = data; + ld de,(_pio_port) + add hl,de + ld (hl),c +;pio.c:49: _pio_data(port, data); + ret .area _CODE .area _INITIALIZER __xinit__pio_port: |