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This commit is contained in:
Jeff Parsons 2015-07-02 12:04:02 -07:00
commit 127a0eafa6
1 changed files with 5 additions and 5 deletions
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10
disks/pc/unix/microport/system-v/2.3/README.md
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@ -15,11 +15,11 @@ For BIOSes that don't support INT 0x13, AH function 0x17, patch the JC with two
After booting, the following code is executed:
12E8:01D3 52 PUSH DX ;history=5
12E8:01D4 51 PUSH CX ;history=4
12E8:01D5 2BC9 SUB CX,CX ;history=3
12E8:01D7 BA6400 MOV DX,0064 ;history=2
12E8:01DA ED IN AX,DX ;history=1
12E8:01D3 52 PUSH DX ;history=5
12E8:01D4 51 PUSH CX ;history=4
12E8:01D5 2BC9 SUB CX,CX ;history=3
12E8:01D7 BA6400 MOV DX,0064 ;history=2
12E8:01DA ED IN AX,DX ;history=1
For virtual machines that don't support word I/O to port 0x64, patch IN AX,DX with IN AL,DX; eg: