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Jonathan Campbell
2019-04-25 11:16:00 -07:00
parent 224b75df29
commit e623f38724
1 changed files with 29 additions and 0 deletions
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NOTES/PC-98 INT DCh/MS-DOS 5.00 boot144.md
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@@ -1549,6 +1549,35 @@ INT DC = 60:36B3
WORD PTR DS:[05DB] = 0x0000 (returned to caller as AX)
return
--
0ADC:3744: (CL=0Fh entry point)
AX = WORD PTR DS:[05DB] ; Caller AX value
IF (AX & 0x8000) != 0 JMP 376Fh ; OR AX,AX ; JS 376Fh
IF AX == 0 JMP 3757h ; ... JZ 3757h
AX--
IF AX == 0 JMP 3763h ; JZ 3763h
AX--
IF AX == 0 JMP 375Dh ; JZ 375Dh
AX--
IF AX == 0 JMP 3769h ; JZ 3769h
0ADC:3756:
return
0ADC:3757: (CL=0Fh AX==0)
(BYTE PTR DS:[010C]) |= 0x01 ; OR ... , 01
return
0ADC:375D: (CL=0FH AX==2)
(BYTE PTR DS:[010C]) |= 0x02 ; OR ... , 02
return
0ADC:3763: (CL=0FH AX==1)
(BYTE PTR DS:[010C]) &= ~0x01 ; AND ... , FEh
return
0ADC:3769: (CL=0FH AX==3)
(BYTE PTR DS:[010C]) &= ~0x02 ; AND ... , FDh
return
0ADC:376F: (CL=0FH AX==0x8000)
TODO
--
0ADC:378E: (CL=10h entry point)