pol/5150
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

polio: exit copy, add writefile

Browse Source
This commit is contained in:
Paul Mathieu
2025-10-06 22:51:59 +02:00
parent 84ea4d5cae
commit a1275671b3
1 changed files with 21 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
src/polio.s
View File

@@ -40,20 +40,6 @@ dosdbt: # assumes es=0
.section .text.int80stuff .section .text.int80stuff
# near copy [param 2] bytes, ds:[param 0] -> ds:[param 1]
copy:
mov ax, [bp-14] # ds
mov es, ax
mov ds, ax
mov cl, 4
shl si, cl
mov si, [bp+0] # source
mov di, [bp+2] # destination
mov cx, [bp+4] # length
cld
rep movsb
ret
## floppy stuff ## floppy stuff
# same as read but with a different int13h:ah value # same as read but with a different int13h:ah value
@@ -122,8 +108,19 @@ readfile:
add ax, si add ax, si
mov dx, [bp+2] mov dx, [bp+2]
add dx, si add dx, si
call fat12_readfile jmp fat12_readfile
ret
# params: ds:fname, ds:src, size
writefile:
mov si, [bp-14] # ds
mov cl, 4
shl si, cl
mov ax, [bp+0]
add ax, si
mov dx, [bp+2]
add dx, si
mov cx, [bp+4]
jmp fat12_writefile
# params: ds:addr, size # params: ds:addr, size
sendpara: sendpara:
@@ -133,8 +130,7 @@ sendpara:
mov ax, [bp+0] mov ax, [bp+0]
add ax, si add ax, si
mov dx, [bp+2] mov dx, [bp+2]
call parasend jmp parasend
ret
# params: ds:addr, size # params: ds:addr, size
recvpara: recvpara:
@@ -144,7 +140,10 @@ recvpara:
mov ax, [bp+0] mov ax, [bp+0]
add ax, si add ax, si
mov dx, [bp+2] mov dx, [bp+2]
call pararecv jmp pararecv
dummy:
mov ax, -1
ret ret
.section .text.int80h .section .text.int80h
@@ -155,6 +154,7 @@ int80h:
push bp push bp
push ds push ds
push es push es
mov bp, sp
xor cx, cx xor cx, cx
mov es, cx mov es, cx
mov ds, cx mov ds, cx
@@ -163,7 +163,6 @@ int80h:
cmp cl, offset int80h_entries cmp cl, offset int80h_entries
jge 0f jge 0f
mov si, cx mov si, cx
mov bp, sp
add bp, 16 # 10 for us, 6 for the interrupt add bp, 16 # 10 for us, 6 for the interrupt
call cs:[int80h_table+si] call cs:[int80h_table+si]
jmp 1f jmp 1f
@@ -179,7 +178,7 @@ int80h:
.section .rodata.int80h .section .rodata.int80h
int80h_table: int80h_table:
.word offset copy # 0x00 .word offset dummy # 0x00
.word offset readsector # 0x01 .word offset readsector # 0x01
.word offset writesector # 0x02 .word offset writesector # 0x02
.word offset formattrack # 0x03 .word offset formattrack # 0x03
@@ -187,5 +186,6 @@ int80h_table:
.word offset recvpara # 0x05 .word offset recvpara # 0x05
.word offset sendpara # 0x06 .word offset sendpara # 0x06
.word offset xferpara # 0x07 .word offset xferpara # 0x07
.word offset writefile # 0x08
int80h_entries = . - int80h_table int80h_entries = . - int80h_table