Use correct chs order in floppy programs

polmon.cc

@@ -54,12 +54,14 @@ uint8_t getc() {
 
 void putc(uint8_t c) {
     asm volatile (
+            "push %%bp          \n\t"
             "movb %0, %%al      \n\t"
             "movb $0x0e, %%ah   \n\t"
             "movb $0, %%bh      \n\t"
             "int $0x10          \n\t"
+            "pop %%bp           \n\t"
             :: "r" (c)
-            : "ax", "bh", "cc", "bp"
+            : "ax", "bh", "cc"
             );
 }
 

readfloppy.asm

@@ -14,11 +14,11 @@ mov es, dx          ; es = 0
 mov bx, 0xf000      ; store the read sector there
 mov ax, 0x0201      ; read, 1 sector
 
-; params: head, cylinder, sector, out
+; params: cylinder, head, sector, out
 mov si, [bp+14]
-mov dh, [si]
-mov si, [bp+12]
 mov ch, [si]
+mov si, [bp+12]
+mov dh, [si]
 mov si, [bp+10]
 mov cl, [si]
 

writefloppy.asm

@@ -14,11 +14,11 @@ mov es, dx          ; es = 0
 mov bx, 0xf000      ; store the read sector there
 mov ax, 0x0301      ; write, 1 sector
 
-; params: head, cylinder, sector, out
+; params: cylinder, head, sector, out
 mov si, [bp+14]
-mov dh, [si]
-mov si, [bp+12]
 mov ch, [si]
+mov si, [bp+12]
+mov dh, [si]
 mov si, [bp+10]
 mov cl, [si]