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Improve timeout management logic.

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This commit is contained in:
Matthieu Bucchianeri
2025-02-10 18:44:42 -08:00
parent 6fd29c313d
commit a1a46d803e
7 changed files with 138 additions and 134 deletions
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66
XTMax/Drivers/BootROM/bootrom.asm
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@@ -473,16 +473,20 @@ func_02_read_sector:
mov ax, wait_msg
call print_string
%endif
mov dx, XTMAX_IO_BASE+0 ; data port
mov cx, 50000 ; timeout (50ms)
jmp .receive_token_no_delay
mov dx, XTMAX_IO_BASE+15; timeout port
mov al, 10 ; 100 ms
out dx, al
.receive_token:
call delay_us
.receive_token_no_delay:
mov dx, XTMAX_IO_BASE+0 ; data port
in al, dx
cmp al, 0xfe
loopne .receive_token
jne .error
je .got_token
mov dx, XTMAX_IO_BASE+15; timeout port
in al, dx
test al, al
jnz .error
jmp .receive_token
.got_token:
%ifdef DEBUG_IO
mov ax, sd_token_msg
call print_string
@@ -625,14 +629,20 @@ cpu 8086
mov ax, wait_msg
call print_string
%endif
mov cx, 50000 ; timeout (50ms)
jmp .receive_status_no_delay
mov dx, XTMAX_IO_BASE+15; timeout port
mov al, 25 ; 250 ms
out dx, al
.receive_status:
call delay_us
.receive_status_no_delay:
mov dx, XTMAX_IO_BASE+0 ; data port
in al, dx
cmp al, 0xff
loope .receive_status
jne .got_status
mov dx, XTMAX_IO_BASE+15; timeout port
in al, dx
test al, al
jnz .error
jmp .receive_status
.got_status:
%ifdef DEBUG_IO
push ax
mov ax, sd_status_msg
@@ -652,15 +662,20 @@ cpu 8086
mov ax, wait_msg
call print_string
%endif
mov cx, 50000 ; timeout (50ms)
jmp .receive_finish_no_delay
mov dx, XTMAX_IO_BASE+15; timeout port
mov al, 25 ; 250 ms
out dx, al
.receive_finish:
call delay_us
.receive_finish_no_delay:
mov dx, XTMAX_IO_BASE+0 ; data port
in al, dx
test al, al
loope .receive_finish
jz .error
jnz .got_finish
mov dx, XTMAX_IO_BASE+15; timeout port
in al, dx
test al, al
jnz .error
jmp .receive_finish
.got_finish:
%ifdef DEBUG_IO
mov ax, sd_idle_msg
call print_string
@@ -1118,21 +1133,6 @@ send_sd_read_write_cmd:
; General utilities
;
;
; Wait 1 microseconds.
; out: AX = <TRASH>
; FL = <TRASH>
delay_us:
push cx
push dx
xor cx, cx
mov dx, 1 ; microseconds
mov ah, 0x86 ; wait
int 0x15
pop dx
pop cx
ret
%include "utils.inc"
%ifdef DEBUG