Post Codes - Aaeon PCM-4330 Instructions Manual

During the Power On SeEfTest, POST codes are sent to I/O port 80h. Each routine
number (hexadecimal) is sent to the post Port before the routine is called. The fol-
lowing table lists all possible POST codes:
Co de Fu nctio n
00h (N one)
01h Ti mer R eset
02h D MA R eset
03h IR Q POST
04h RT C R eset
05h KBD R eset
06h Video Blank
07h NVS Chec ks um
08h N VS Def ault
09h RO M Chec ks um
10h M emory Siz ing
11h PO ST Setup
12h Setup O pt ion R OM
15h Tim er Test
16h NC P POST
17h KBD Setup
18h Vide o POST
19h O ptio n POST
1Ah Dis play PO ST
25h (N one)
26h F loppy POST
27h (N one)
28h Serial POST
29h Parallel POST
Descr i ptio n
Hook for C pu t ype det ec tion (CPU ext ens ion)
I nit ializ es the tim er
Ini tial izes t he D MA c ontrol ler
I nit iali zes the int errupt c ontrol ler
Init ializ es R TC cont rol regis ters
I nit ializ es the k ey board Error codes : BAh... BFh
Clears s creen (if 684~ pr esent )
Calc ulat es CMO S c hec ks um
Ini ti alize s C MOS if c heck sum bad
Cal culates ROM chec ks um, s ys tem halt ed if
c heck sum bad
C heck s memor y pr esenc e, sav es s iz e in C MOS
I nit ializ es memor y, s et s i nterr upt vec tors
Init ial izes opt ion R OM t able
Enabl es tim er I RQ (I NT 8)
D etec ts c o-proc ess or
Set up k eyboard varia bles (in dat a area),
enabl es k ey board IRQ (INT 9)
I niti aliz es I SA v ideo if pres en
Det ect s non-v ideo opt ion R OM s, s tores r in
opt ion R O M t able
Set up PO ST wi ndow, di splay s early res ults
PS/ 2 m ouse i nit hooks here i f PS2M ex tens ion
is present
Detec ti on and init ial izat ion of f loppy dis k drives
IDE hard disk ini t hook s here if F IXED ex tens ion
is present
Detec tion and init iali zat ion of s erial ports
D etec t ion and ini ti aliz ation of parallel ports