IBM XT 5160 Technical Reference page 247

IBM Personal Computer MACRO Assembler Version 2.00
POST -----
01/10/86
SYSTEM POST AND BIOS PROCEDURES
1-17
01-10';'86
INPUT
; --- I NT 15 ---------------- --------------------------- -------- ----------
I NTERRUPTS BACK ON
SAVE SEGMENT REGI STER
GET THE CURRENT SETT I NGS
RECOVER SEGMENT
RETURN TO CALLER
I NTERRUPTS BACK ON
SA VE SEGMENT
GET VALUE
RECOVER SEGMENT
RETURN TO CALLER
ADDR OF ERROR MSG
1/0 PAR I TY CHECK
01 SPLA Y ERROR MSG
MUST BE PLANAR
; INIT AND SET MODE FOR VIDEO
CALL V IDEO 10 PROCEDURE
PR I NT ERROR MSG
FAR
FAR
AH,O
AL ,"CRT MODE
10H -
P_MSG
DX,DATA
DS,DX
SI,OFFSETDI
AL,40H
013
S I ,OFFSET 02
OF859H
o
1859H
ENDP
OS
DDS
AX, "EQU I P FLAG
OS -
OS
DDS
AX, "MEMORY SIZE
OS -
MOV
MOV
INT
CALL
MOV
MOV
MOV
TEST
.JNZ
MOV
OUTPUT
( AX ) I S SET, BITS I GN I F I CANT, TO I NO I CATE ATT ACHED I
10
BIT I 5 , 14 = NUMBER OF PR INTER S ATT ACHED
BIT 13 NOT USED
BIT I 2 = GAME I lOA TT ACHED
BIT I 1 ,10,9 = NUMBER OF RS232 CARDS ATTACHED
BIT 8 UNUSED
BIT 7,6 = NUMBER OF 0 I SKETTE DR I VES
00= 1, 0 1= 2 , 10 = 3 , 11 = 4 ONL Y I FBI T 0 = 1
BIT 5,4 = INITIAL VIDEO MODE
00 - UNUSED
01 - 40X25 BW US I NG COLOR CARD
10 - 80X25 BW US I NG COLOR CARD
1 I - 80X25 BW US I NG BW CARD
BIT 3,2 = PLANAR RAM SIZE (OO=256K,01=512K,10=576K,l1=640K)
BIT 1 = MATH COPROCESSOR
BIT 0 = I PL FROM 0 I SKETTE - - TH I S BIT I NO I CATES THAT
THERE ARE 0 I SKETTE DR I VES ON THE SYSTEM
013:
ORG
ORG
CASSETTE 10:
JMP
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
NO OTHER REG I STERS AFFECTED ;
;
-
- -
-
--
--
- -
-
-- --
--
-
-
-
-
-
--
- -
-
--- --
-
-
-
-
------
-
--
-
---
--
--
-
-
--
-
---
-
--
---
--
--;
ASSUME CS:CODE,DS:DATA
ORG OF84DH
ORG 0184DH
EQU I PMENT PROC
STI
PUSH
CALL
MOV
POP
IRET
EQUIPMENT
ASSUME CS:CODE,DS:DATA
ORG OF841H
ORG 01841H
MEMORY SIZE DET PROC
- STI-
PUSH
CALL
MOV
POP
IRET
MEMORY_ SIZE_ DET ENDP
.
--
-
- -
- - -
-
-- -
- -- - - - - - - - - - -
-
- - - - - - -
-
- ---
--
-
- - - --
-
--
- --- ---
--
-
- -
---
NM I I NT I PROC NEAR
- -ASSUME OS :DATA
PUSH AX SAVE OR I G CONTENTS OF AX
IN AL,PORT C
TEST AL, OCOH- PAR I TY CHECK?
.JNZ NMI 1
.JMP 014- I NO, EXIT FROM ROUTINE
.
- -
--
-
- -
- - -
-----
-
--
-
-
-
--
-
- --- - - -- -
-
-
- -----
-
- - -
-
-
-
- - - - -
-
- -
-
- - --- --
NON-MASKABLE I NTERRUPT ROUT I NE:
TH IS ROUTI NE WILL PR I NT A "PAR I TY CHECK I OR 2" MESSAGE
AND ATTEMPT TO F I NO THE STORAGE LOCATION CONT A I N I NG THE
BAD PAR I TY • I F FOUND, THE SEGMENT ADDRESS WILL BE
PR I NTED • I F NO PAR I TY ERROR CAN BE FOUND (I NTERM I TT ANT
; READ PROBLEM) ? ? ? ? ?
<-
WILL BE PR I NTED WHERE THE ADORE SS
WOULD NORMALL Y GO.
NO REG I STERS
THE EQU I P FLAG VAR I ABLE I S SET OUR I NG THE POWER ON
01 AGNOSTI CS US I NG THE FOLLOW I NG HARDWARE ASSUMPT IONS
I
PORT 60 = LOW ORDER BYTE OF EQUPMENT
PORT 3FA = I NTERRUPT 10 REG I STER OF 8250
BITS 7-3 ARE ALWAYS 0
PORT 378 = OUTPUT PORT OF PRINTER -- 8255 PORT THAT
CAN BE READ AS WELL AS WR I TTEN
; --- INT 11 -----------------------------------------------------------
; EQU I PMENT DETERM I NA T I ON
; TH IS ROUTI NE ATTEMPTS TO DETERM I NE WHAT OPTI ONAL
; DEV I CES ARE ATTACHED TO THE SYSTEM.
PAGE
; - - - I NT 12 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --
; MEMORY SIZE DET
I
; TH I S ROUT I NE DETERM I NES THE AMOUNT OF MEMORY I N THE SYSTEM
I
; AS REPRESENTED BY THE SW I TCHES ON THE PLANAR. NOTE THAT THE
I
; SYSTEM MAY NOT BE ABLE TO USE 1/0 MEMORY UNLESS THERE I S A FULL
I
; COMPLEMENT OF 64K BYTES ON THE PLANAR.
I
; INPUT
I
; NO REG I STERS
I
; THE MEMORY SIZE VARIABLE IS SET DURING POWER ON DIAGNOSTICS
I
; ACCORD I NG-TO THE FOLLOW I NG HARDWARE ASSUMPT IONS
I I
; PORT 60 BITS 3,2 = 00 - 256K BASE RAM ;
; 0 I - 51 2K BASE RAM ;
; 10 - 576K BASE RAM ;
; I 1 - 640K BASE RAM ;
; PORT 62 BITS 3-0 INDICATE AMOUNT OF 1/0 RAM IN 32K INCREMENTS
I
; E.G., 0000 - NO RAM IN 1/0 CHANNEL
I
; 0010 - 64K RAM IN 1/0 CHANNEL, ETC.
I
; OUTPUT
I
; (AX) = NUMBER OF CONT I GUOUS 1K BLOCKS OF MEMORY
I
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842 1841
1843 1841
1844 1841 FB
1845 1842 IE
1846 1843 E8 1A 12 R
1847 1846 A I 0013 R
1848 1849 IF
1849 184A CF
1850 184B
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888 1840
1889 1840
1890 1840 FB
1891 184E IE
1892 184F E8 1AI2 R
1893 1852 A I 0010 R
1894 1855 IF
1895 1856 CF
1896 1857
1897
1898
1899
1900
1901 1859
1902 1859
1903 1859 E9 0000 E
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914 185C
1915
1916 185C 50
191 7 1850 E4 62
1918 185F A8 CO
1919 1861 75 03
1920 1863 EB 58 90
1921 1866
1922 1866 BA ---- R
1923 1869 8E DA
1924 186B BE 18E2 R
1925 186E A8 40
1926 1870 75 03
1927 1872 BE 18F2 R
1928 1875
1929 1875 B4 00
1930 1877 AO 0049 R
1931 187 A CD 10
1932 187C E8 1997 R
5-100 POST (01/10/86)