IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)
IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)
IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)
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LaC OBJ LINE SOURCE<br />
0004<br />
0002:<br />
0001<br />
0018 11<br />
0080<br />
0040<br />
OOZO<br />
0010<br />
0008<br />
0019 ?? <br />
OOlA ???? <br />
ODIC ???? <br />
ODIE (16 ???'?) <br />
003E<br />
0045<br />
0046<br />
0038<br />
0010<br />
003A<br />
002A<br />
0036<br />
0052<br />
0053<br />
003E ??<br />
0080<br />
003f ??<br />
0040 ??<br />
0025<br />
0041 ??<br />
0080<br />
0040<br />
0020<br />
0010<br />
0009<br />
0008<br />
0004<br />
0003<br />
0002<br />
0001<br />
0042 (7 ?? J<br />
78 eTL_SHIFT EOU 04H ; CONTROL SHIFT KEY DEPRESSED <br />
79 lEfT_SHIFT EOU 02H ; lEFT SHIFT KEY DEPRESSED <br />
80 RIGHT_SHIFT EOU O1H ; RIGHT SHIFT KEY DEPRESSED <br />
81 <br />
82 DB ; SECOND BYTE OF KEYBOARD STATUS <br />
83 <br />
INS_SHIFT 84 EOU 80H ; INSERT KEY IS DEPRESSED <br />
85 CAPS_SHIFT EOU 40H ; CAPS LOCK KEY IS DEPRESSED <br />
8. HUH_SHIFT EOU 20H ; NUN LOCK KEY IS DEPRESSED <br />
87 SCROLL_SHIFT EOU IOH SCROLL LOCK KEY IS DEPRESSEO <br />
88 HOLD_STATE EOU 08H SUSPEND KEY HAS BEEN TOGGLED <br />
89 <br />
90 ALT_INPUT DB STORAGE fOR ALTERNATE KEYPAD ENTRY <br />
91 BUFFER_HEAD OW POINTER TO HEAD Of KEYBOARD BUFFER <br />
.2 BUFFER_TAIL OW POINTER TO TAIL OF KEYBOARD BUFFER <br />
93 KB_BUFFER OW 16 Dupe? I j ROOM FOR 15 ENTRIES <br />
94 KB_BUFFER_EHO LABEL WORD <br />
.5<br />
96 j------ HEAD = TAIL INDICATES THAT THE BUFFER IS EMPTY<br />
.7<br />
••<br />
••<br />
98 NUMJEY EOU SCAN CODE FOR NUMBER LOCK<br />
SCROLL_KEY EOU 70 SCROLL LOCK KEY<br />
100 ALTJEY EOU 5. ALTERNATE SHIFT KEY SCAN COOE<br />
101 CTL_KEY EOU 2. SCAN CODE FOR CONTROL KEY<br />
102 CAPS_KEY EOU 58 SCAN CODE FOR SHIFT LOCK<br />
103 LEFT_KEY EOU 42 SCAN CODE FOR LEFT SHIFT<br />
104 RIGHTJEY EOU 54 SCAN COOE FOR RIGHT SHIFT<br />
105 INS_KEY EOU 82 SCAN CODE FOR UlSERT KEY<br />
10. DEL_KEY EOU 83 SCAN CODE FOR DELETE KEY<br />
107<br />
108 j -------------------------------------------<br />
109 j DISKETTE DATA AREAS<br />
110 j -------------------------------------------<br />
111 DB ; DRIVE RECALIBRATION STATUS<br />
112 BIT 3-0 = DRIVE 3-0 NEEDS RECAL BEFORE<br />
113 NEXT SEEK IF BIT IS = 0<br />
114 INTJLAG EOU oaOH ; INTERRUPT OCCURRt:NCE FLAG<br />
115 MOTOR_STATUS DB ; MOTOR STATUS<br />
11. BIT 3-0 = DRIVE 3-0 IS CURRENTLY R\..INI'IIHG<br />
117 I BIT 7 = CURRENT OPERATION IS A WRITE. REQUIRES DEU.Y<br />
118 ttOTOR_COUNT DB ; TIME OUT COUNTER fOR DRIVE TURN OFF<br />
MOTOR_WAIT EQU 37 ; TWO SECONDS OF COUNTS FOR I1OTOR TURN OFF <br />
"' 120 <br />
121<br />
122 DISKETTE_STATUS DB j SINGLE BYTE OF RETURN CooE INFO FOR STATUS<br />
123 TIME_OUT EQU 80H ; ATTACHMENl rAILED TO RESPOND<br />
124 BAD_SEEK EQU 40H ; SEEK OPERATION FAILED<br />
125 BAD_NEC EQU 20H ; NEe CONTROLLER HAS FAILED<br />
12' BAD_CRC EQU IOH j BAD CRC ON DISKETTE READ<br />
127 DMA_BOUNDARY EqU 09H ; ATTEMPT TO DMA ACROSS 64K BOUNDARY<br />
128 BAD_DMA EQU 08H ; DMA OVERRUN ON OPERATION<br />
12' RECORD_NOTJND EQU 04H I REQUESTED SECTOR NOT FOUND<br />
130 WRITE_PROTECT EQU OJH I WRITE ATTEMPTED ON WRITE PROT DISK<br />
131 BAO ADDR_HARK EQU 02H ADDRESS MARK HOT FOUND<br />
132 BAD_CHO EQU O1H BAD COMNAND PASSED TO DISKETTE I/O<br />
133<br />
134 DB 7 DUP(?) ; STATUS BYTES FROM NEC<br />
135<br />
0049 ??<br />
004A ????<br />
004C ????<br />
004E ????<br />
~ 0050 (8 ????I<br />
0060 ????<br />
0062 ??<br />
0063 ?1?1<br />
0065 ??<br />
0066 ??<br />
0067 '????<br />
0069 ????<br />
136 j -------------------------------------------<br />
137 ; VIDEO DISPLAY DATA AREA<br />
138 ; -------------------------------------------<br />
139 CRT_MODE DB ; CURRENT CRT HOOE<br />
140 CRT_COLS OW ; HUMBER OF COLUMNS ON SCREEN<br />
141 CRT_LEN ow j LENGTH OF REGEN IN BYTES<br />
142 CRT_START OW STARTING ADDRESS IN REGEN BUFFER<br />
143 CURSOR_POSN ow 8 DUP{?) ; CURSOR FOR EACH OF UP TO a PAGES<br />
144 CURSOR MODE OW CURRENT CURSOR MODE SETTING<br />
145 ACTIVE_PAGE DB CURRENT PAGE BEING DISPLAYED<br />
14. ADDR_684S OW BASE ADDRESS FOR ACTIVE DISPLAY CARD<br />
147 CRT_MODE SET DB CURRENT SETTING Of 1liE 3X8 REGISTER<br />
14B CRT_PALLETTE DB ; CURRENT PALLETTE SETTING COLOR CARD<br />
14,<br />
150 ; -------------------------------------------<br />
151 ; CASSETTE DATA AREA<br />
152 j-------------------------------------------<br />
153 OW ;TIME COUNT AT DATA EDGE<br />
154 ow JCRC REGISTER<br />
A-3
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