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|
#type ("17.klein")#
System-Ports:
Port | Funktion
-----+--------------------------------------------------------------------
| DMA Controller 1 (8237A-5) fr Bytetransfers (Kanal 0..3)
00 | Byteadresse (start/current) Kanal 0 (frei fr Memory-Memory Transfer)
01 | Bytecount Kanal 0 (Pageregister 87H) (Sourcechannel)
02 | Byteadresse (start/current) Kanal 1 (reserviert fr SDLC)
03 | Bytecount Kanal 1 (Pageregister 83H) (Destinationchannel)
04 | Byteadresse (start/current) Kanal 2 (Diskette)
05 | Bytecount Kanal 2 (Pageregister 81H)
06 | Byteadresse (start/current) Kanal 3 (XT: Harddisk)
07 | Bytecount Kanal 3 (Pageregister 82H)
08 | Read: DMA-Status (D4..D7:1 = DREQ liegt an, D0..D3:0 = Kanal Busy)
| Write: DMA-Command:
| D0 1 = memory<-->memory transfer enabled
| D1 Falls D0 = 1: 1 = Kanal 0 Adresse INCR/DECR, 0 = Adr. unverndert
| D2 1 = DMA-Control enabled
| D3 1 = R/W-Signal verkrzt
| D4 0 = Feste Kanalprios, 1 = Kanalprios rotieren
| D5 Falls D3 = 0, 1 = verzgertes R/W-Signal, 0 = verlngertes R/W
| D6 1 = DREQ active-low, 0 = DREQ active-high
| D7 1 = DACK active-high, 1 = DACK active-low
09 | Read/Write: Anforderungsregister
| D1, D0 = Nummer des aktiven DMA-Kanals
| D2 1 = DMA-Transfer anstossen, (D0/D1 = Kanalnummer)
| 0 = DMA-Transfer wurde per Hardware angestossen
0A | Read/Write : Single Mask Register Bit
| D0..D3 fr jeden Kanal: 1 = DREQ gesperrt, 0 = DREQ freigegeben
0B | Write: Mode-Register
| D1, D0 bestimmen den Kanal auf den sich D2..D7 beziehen (0..3)
| D3, D2 (falls D6=D7=1 (Kaskade) ohne Bedeutung)
| 0 0 Prfzyklen
| 0 1 Write in Memory
| 1 0 Read aus Memory
| 1 1 Illegal
| D4 1 = Autorepeat
| D5 1 = DECR Adressen, 0 = INCR Adressen
| D7, D6
| 0 0 Polling
| 0 1 Cycle Steal
| 1 0 Burst Mode
| 1 1 Kaskadierter Controller
0C | Clear Byte Pointer Flip-Flop
0D | Read: Temporary-Register, Write: Master Clear
0E | Clear Mask Register
0F | Write: All Mask Register
|
| Interrupt-Controller 1 (Master) 8259, siehe Datenblatt
20 | Write: ICW1, OCW2, OCW3, Read: ISR, IRQ-Level (Je nach Zustand)
21 | Write: ICW2, ICW3, ICW4, OCW1, Read: IMR (Je Nach Zustand)
|
| Intervall-Timer 8254.2
40 | Channel 0 Timeconstant (System Interrupt IRQ 0)
41 | Channel 1 Timeconstant (Refesh Request)
42 | Channel 2 Timeconstant (Speaker Output)
43 | Control (Channel 0..2)
|
| KEYBOARD
60 | Keyboard Data Read/Write
61 | System Control Port (In/Out Port)
| Write:
| D0 = Speaker Gate
| D1 = Speaker Data
| D2 = Base Parity Check (<512k), 0 = Parity Check erlaubt
| D3 = Channel Parity Check (>=512k), 0 = Parity Check erlaubt
| Read:
| D4 = 1 = Refresh Detected
| D5 = 1 = Output Timer 2
| D6 = 1 = IO-RAM Parity Error
| D7 = 1 = Base-RAM Parity Error
64 | Keyboard Command/Status Port
| Write (Command):
| Command C0H liest Input Port, Byte im Datenregister ist dann:
| D4 : 0 = 2nd 256k Board-RAM disabled
| D5 : 0 = Manufacturing Jumper installed
| D6 : 1 = Primary Display is Monochrome, 0 = Color
| D7 : 0 = Keyboard is inhibited
| Command D0H liest Output Port, Byte im Datenregister ist dann:
| D0 : 0 = System Reset
| D1 : Gate A20 (AND-Verknpfung mit A20-Adressleitung)
| D4 : Output-Buffer full
| D5 : Input-Buffer empty
| D6 : Keyboard clock (output)
| D7 : Keyboard data (output)
| D1H schreibt Output Port, sonst wie D0H
| Read (Status):
| D0 : 1 = Outputbuffer is filled (Keyboard --> Computer)
| D1 : 0 = Inputbuffer is empty
| D2 : System-Flag
| D3 : Last Write: 1 = Command, 0 = Data
| D4 : 0 = keyboard is inhibited
| D5 : 1 = Transmit-Timeout Error
| D6 : 1 = Receive-Timeout Error
| D7 : 1 = Parity Error (Receive)
|
| RTC/RAM
70 | CMOS-Adresse, NMI-Mask
| D0..D5 = CMOS-Adresse (0..63)
| D7 : 0 = NMI enabled, 1 = NMI disabled (Power-Fail, Parity-Check, NP)
| RTC-Adressen:
| 00 : Seconds
| 01 : Alarm Seconds
| 02 : Minutes
| 03 : Alarm Minutes
| 04 : Hours
| 05 : Alarm Hours
| 06 : Day of week (1..7)
| 07 : Date of Month
| 08 : Month
| 09 : Year (32H = Century)
| 0A : Status Register A : Bit 7 = 1 Update in progress
| 0B : Status Register B : Bit 5 = 1 Alarm Interrupt enabled
| Bit 0 = 1 Sommerzeit (Ende Mai..Ende Okt.!)
| 0C : Status register C : Bit 7 = 1 Interrupt occured
| 0D : (Read!) Bit 7 = 1 Power Good
| RAM-Adressen:
| 0E : Diagnostic Status Byte
| D7 : 1 = RTC lost power
| D6 : 1 = CMOS Checksum wrong
| D5 : 1 = Primary Display not set/No Diskette attached
| D4 : 1 = Memory Size miscompare (Vorhanden <> Setup-angegeben)
| D3 : 1 = Fixed Disk (Drive C) not ok
| D2 : 1 = RTC Time/Status nicht gltig
| 0F : Shutdown Status Byte (Restart Code)
| 0 = Power on Reset
| 9 = Enter Real Mode:
| TESTPORT = 32, Stack (SS=0469,SP=0467) RET-Adr., PUSHA, ES, DS
| 10 : Diskette configuration:
| D4..D7 : 0 = Not installed
| 1 = 48 tpi (double sided) Drive A
| 2 = 96 tpi (high capacity)
| D0..D3 : 0 = Not installed
| 1 = 48 tpi (double sided) Drive B
| 2 = 96 tpi (high capacity)
| 12 : Fixed Disk configuration:
| D4..D7 : 0 = Not installed
| 1..14 Tabelle Drive C
| 15 = Typ 16..47 spezifiziert
| D0..D3 : 0 = Not installed
| 1..14 Tabelle Drive D
| 15 = Typ 16..47 spezifiziert
|
|
| 14 : Equipment Byte (only for Power on Diagnostics)
| D6/D7 : 0 = 1 Floppy
| 1 = 2 Floppys
| D4/D5 : 0 = No Primary Display
| 1 = Color 40 Zeichen
| 2 = Color 80 Zeichen
| 3 = Monochrome
| D1 : 1 = Mathe Coprozessor installed
| D0 : 1 = Disk drives are installed
|
| 15/16 : Base Memory Size (in KB)
| 15 = low, 16 = high
|
| 17/18 : Expansion Memory Size (in KB)
| 17 = low, 18 = high
|
| 2E/2D Checksum der Adressen 10..20
| 2E = high, 2F = low
|
| 30/31 : Expansion Memory Size (in KB ber ersten 1MB)
| 30 = low, 31 = high
|
| 32 : Date Century Byte (19)
|
| 33 : Information Flag
|
71 | CMOS-Daten (Read/Write)
|
| Memory Mapper 74LS612
80 | Test-Port (Read/Write) Fehlerstatus der letzten Testoperation
81 | Channel 2 DMA-Pageregister
82 | Channel 3 DMA-Pageregister
83 | Channel 1 DMA-Pageregister
84 | frei
85 | frei
86 | frei
87 | Channel 0 DMA-Pageregister
88 | frei
89 | Channel 6 DMA-Pageregister
8A | Channel 7 DMA-Pageregister
8B | Channel 5 DMA-Pageregister
8C | frei
8D | frei
8E | frei
8F | Refresh Register
|
| Interrupt-Controller 2 (Slave) 8259, siehe Datenblatt
A0 | Write: ICW1, OCW2, OCW3, Read: ISR, IRQ-Level (Je nach Zustand)
A1 | Write: ICW2, ICW3, ICW4, OCW1, Read: IMR (Je Nach Zustand)
|
| DMA Controller 2 (8237A-5) fr Wordtransfers (Kanal 5..7)
C0 | Wordadresse (start/current) Kanal 4 (Kaskade fr Controller 1)
C2 | Wordcount Kanal 4
C4 | Wordadresse (start/current) Kanal 5 (frei)
C6 | Wordcount Kanal 5 (Pageregister 8BH)
C8 | Wordadresse (start/current) Kanal 6 (frei)
CA | Wordcount Kanal 6 (Pageregister 89H)
CC | Wordadresse (start/current) Kanal 7 (frei)
CE | Wordcount Kanal 7 (Pageregister 8AH)
D0 | Read: DMA-Status (D4..D7:1 = DREQ liegt an, D0..D3:0 = Kanal Busy)
| Write: DMA-Command:
| D0 1 = memory<-->memory transfer enabled
| D1 Falls D0 = 1: 1 = Kanal 4 Adresse INCR/DECR, 0 = Adr. unverndert
| D2 1 = DMA-Control enabled
| D3 1 = R/W-Signal verkrzt
| D4 0 = Feste Kanalprios, 1 = Kanalprios rotieren
| D5 Falls D3 = 0, 1 = verzgertes R/W-Signal, 0 = verlngertes R/W
| D6 1 = DREQ active-low, 0 = DREQ active-high
| D7 1 = DACK active-high, 1 = DACK active-low
D2 | Read/Write: Anforderungsregister
| D1, D0 = Nummer des aktiven DMA-Kanals
| D2 1 = DMA-Transfer anstossen, (D0/D1 = Kanalnummer)
| 0 = DMA-Transfer wurde per Hardware angestossen
D4 | Read/Write : Single Mask Register Bit
| D0..D3 fr jeden Kanal: 1 = DREQ gesperrt, 0 = DREQ freigegeben
D6 | Write: Mode-Register
| D1, D0 bestimmen den Kanal auf den sich D2..D7 beziehen (4..7)
| D3, D2 (falls D6=D7=1 (Kaskade) ohne Bedeutung)
| 0 0 Prfzyklen
| 0 1 Write in Memory
| 1 0 Read aus Memory
| 1 1 Illegal
| D4 1 = Autorepeat
| D5 1 = DECR Adressen, 0 = INCR Adressen
| D7, D6
| 0 0 Polling
| 0 1 Cycle Steal
| 1 0 Burst Mode
| 1 1 Kaskadierter Controller
D8 | Clear Byte Pointer Flip-Flop
DA | Read: Temporary-Register, Write: Master Clear
DC | Clear Mask Register
DE | Write: All Mask Register
|
| Coprozessor
F0 | Clear Coprozessor Busy
F1 | Reset Coprozessor (mit D0..D7 = 0) und in Real Mode bringen)
|
F8 | Coprozessor Ports (vom 80286 vorgegeben)
...|
FF |
|
-----+---------------------------------------------------------------------
|
| Harddisk WD1010
01F0 | Read/Write: Daten (am besten per DMA uebertragen)
01F1 | Write: Taskfile Byte 1 (Write Precomp DIV 4, 6 Bit)
| Read : Error Register
| D0..D7 <> 1 : Fehler aufgetreten
01F2 | Write: Taskfile Byte 2 (Sector Count 8 Bit)
01F3 | Write: Taskfile Byte 3 (Sector Number 6 Bit)
01F4 | Write: Taskfile Byte 4 (Cylinder low 8 Bit)
01F5 | Write: Taskfile Byte 5 (Cylinder high 2 Bit D6,D7)
01F6 | Write: Taskfile Byte 6
| D0..D3 = Head
| D4 : 0 = Drive C, 1 = Drive D
| D5 : 1 = 512 Bytes/Sektor, 0 = 256 Bytes/Sektor
| D6 :
| D7 : 1 = ECC versuchen
01F7 | Write: Taskfile Byte 7 (Commandbyte, Retries)
| D0 : 1 = No Retries
| D1 : 1 = 4 ECC Bytes uebrtragen
| D2 :
| D3 :
| CMD: 7654 Funktion
| 0000
| 0001 Recalibrate
| 0010 Read
| 0011 Write
| 0100 Verify
| 0101 Format Taskfile Byte 3: Gap
| 0110
| 0111 Seek
| 1000
| 1001 D0 = 1: Set Parameters, D0 = 0 : Diagnostics
| 1010
| 1011
| 1100
| 1101
| 1110
| 1111
| Read : Status Register
| D7 : 1 = BUSY
| D6 : 1 = Not ready
| D5 : Write fault
| D4 : Seek not complete
| D3 : 1 = Request Data
| D2 : 1 = Data corrected
| D1 : 1 =
| D0 : 1 =
01F8 | Datenport Read/Write
01F9 | Write: Reset
| Read: Statusport
01FA | Write: Select
01FB | Write: DMA/IRQ Maskenregister
|
| Game Connector
0200 |
0201 | Write: Start Monoflops
| Read:
| D0..D3 : Ausgnge der 4 Monoflops Zeit = (24.2 + 0.011 * R(kOhm))us.
| D4..D7 : Auslsetasten (nicht entprellt)
0202 | Nicht verwendet, aber ausdekodiert
... |
0207 |
|
| Printer 2 (LPT2)
0278 | Write: Daten (Read latched write data)
0279 | Read/Write:
| D3 : -ERROR
| D4 : -SLCT in
| D5 : PE
| D6 : -ACK
| D7 : BUSY
027A | D0 : -STROBE
| D1 : -AUTOFEED
| D2 : INIT
| D3 : -SLCT out
| D4 : IRQ Mask
027B | N.C.
... |
027F |
|
02F8 | RS232C Adapter (COM2) wie COM1 (03F8..03FF)
... | Generiert IRQ 3
02FF |
|
0300 | Prototype Card
... |
031F |
|
| Printer 1 (LPT1, wie 03B8..03BA)
0378 | Write: Daten (Read latched write data)
0379 | Read/Write:
| D3 : -ERROR
| D4 : -SLCT in
| D5 : PE
| D6 : -ACK
| D7 : BUSY
037A | D0 : -STROBE
| D1 : -AUTOFEED
| D2 : INIT
| D3 : -SLCT out
| D4 : IRQ Mask
037B | N.C.
... |
037F |
|
| SDLC, bisync 2
| 0380..0383 = 8255 : Parallel Ports
0380 | Port A - Read
| D0 : 0 = Rufzeichen liegt an (RI)
| D1 : 0 = Trgerfrequenzkennung liegt an (DCD)
| D2 : TXCLK (Diagnostic)
| D3 : 0 = Sendebereitschaft liegt an (CTS)
| D4 : RXCLK (Diagnostic)
| D5 : 1 = Modemstatusnderung (DSR changed)
| D6 : 1 = Timer 2 Output active
| D7 : 1 = Timer 1 Output active
0381 | Port B - Write
| D0 : 0 = Baudrateselektor ein
| D1 : 0 = Auswahlbereitschaft ein
| D2 : 0 = Prfung einschalten
| D3 : 1 = Reset Modemstatusnderungs Flip-Flop
| D4 : 1 = Reset 8273
| D5 : 1 = Timer 2 durchschalten
| D6 : 1 = Timer 1 durchschalten
| D7 : 1 = IRQ 4 aktivieren
0382 | Port C - D0..D3 Write, D4..D6 Read, D7 N.C.
| D0 : 1 = Internen Takt durchschalten
| D1 : 1 = Externen Takt durchschalten
| D2 : 1 = Elektronischer Test
| D3 : 0 = IRQ 3 + 4 durchschalten
| D4 : RX Daten
| D5 : Timer 0 Output
| D6 : 0 = Prfanzeige aktiv
0383 | 8255 Modussteuerregister
|
| 0384..0387 = 8253: Timer
0384 | Timer 0 low/high. Ausgang ist Eingang von Timer 2 (Bit 5 in 0382)
0385 | Timer 1 low/high. Timeout Counter
0386 | Timer 2 low/high. Timeout Counter
0387 | 8254 Modusregister
|
| 0388..038C = 8273 SDLC Controller
0388 | Read: Statusregister
| Write: Befehlsregister
0389 | Read: Ergebnisregister
| Write: Parameterregister
038A | DMA/Interrupt Register fr Empfangen
038B | DMA/Interrupt Register fr Senden
038C | Datenport Read/Write
| 8273 Registerbeschreibung:
| Moderegister (Bit D6..D7 whlt Counter auf den sich D0..D5 beziehen)
| D0 : 0 = Counter 16 Bit Binr
| 1 = Counter 4 Dekad. BCD
| D1..D3 : Modus 0..5 (D7 = 1)
| D4..D5 : D54
| 00 = Counter stop
| 01 = read/write highbyte
| 10 = read/write lowbyte
| 11 = erst low, dann highbyte read/write
| D6..D7 : Counter auswhlen (00=0, 01=1, 10=2, 11=3)
|
| Betriebsarten Register
| D0 : 1 = Kennzeichenmodus
| D1 : 1 = Sync fr 2. Header
| D2 : 1 = Buffer Modus
| D3 : 1 = Vorzeitigen Sendeinterrupt aktivieren
| D4 : 1 = EOP IRQ aktivieren
| D5 : 1 = MDLC Abbruch aktivieren
|
| Serial I/O Moderegister
| D0 = 1 : NRZI Modus
| D1 = 1 : Clock Loopback
| D2 = 1 : Data Loopback
|
| Transmit Moderegister
| D0 = 1 : Datenbertragung unterbrechen
|
| Singlebit Delay Modusregister
| D7 = 1 : Singlebit delay aktivieren
|
038D | N.C.
... |
038F |
|
|
03A0 | bisync 1
... | wie 0380..038F
03AF |
|
| Hercules komp. Mono/Graphik Karte
| Mit * gekennzeichnete Bits sind nicht auf allen Karten verfgbar.
03B4 | Indexport 6845 (Videocontroller)
| Write: Register Nummer 0..17
03B5 | Datenport 6845 : Register (Write only, sofern nichts anderes vermerkt)
| 0: D0..D7 = Anzahl Zeichen pro Zeile -1 (Horizontalfreq.)
| 1: D0..D7 = Anzahl dargestellte Zeichen pro Zeile
| 2: D0..D7 = Zeichenposition-1 des HSYNC Signals
| 3: D0..D3 = Breite-1 des HSYNC Signals in Zeichen
| 4: D0..D6 = Anzahl Zeichenzeilen (Vertikalfreq. 50/60 Hz)
| 5: D0..D4 = Bilddurchlauf Abgleich in Mikrozeilen
| 6: D0..D6 = Anzahl dargestellte Zeichenzeilen
| 7: D0..D6 = Zeichenzeile, bei der VSYNC Signal beginnt
| 8: D0 = 0 : Kein Zeilensprungverfahren
| = 1 und D1 = 0 : Zeilensprungverfahren, normale Dichte
| =1 und D1 = 1 : Zeilensprungverfahren, doppelte Dichte
| 9: D0..D4 = Mikrozeilen/Zeichen-1
| 10: D0..D4 = Startmikrozeile des Cursors
| D5/D6 = 0 : Cursor normal, blinkend
| 1 : Cursor unsichtbar
| 2 : Cursor blinkt mit 1/16 der Vertikalfrequenz
| 3 : Cursor blinkt mit 1/32 der Vertikalfrequenz
| 11: D0..D4 = Endmikrozeile des Cursors
| 12: D0..D5 = Highbits der Speicherstartadresse
| 13: D0..D7 = Lowbits der Speicherstartadresse
| 14: D0..D5 = Highbits der aktuellen Cursorspeicheradresse (Read/Write)
| 15: D0..D7 = Lowbits der aktuellen Cursorspeicheradresse (Read/Write)
| 16: D0..D5 = Highbits der Speicherstelle, bei der LPSTB ausgelst
| 17: D0..D7 = Lowbits der Speicherstelle, bei der LPSTB ausgelst
03B8 | Write: Display Mode Control Port
| D1: 6845 muss nach einer nderung dieses Bits neu initialisiert werdem
| 0 : Text Mode (Zeichen 9 x 14, 0.5625us/Zeichen)
| 1 : Graphik Mode (Zeichen 4 x 16, 1us/Zeichen Horizontal)
| D3: 0 : Screen blanked (Bei Init 6845 auf 0 setzen)
| 1 : Screen activated
| D5: 0 : Textblinker (Attributbit 7 = 1) ausgeschaltet
| 1 : Textblinker angeschaltet
|*D6: 0 : 80 Spalten Modus (nur CT6040S)
| D7: 0 : Graphikpage 0 (B0000..B7FFF)
| 1 : Graphikpage 1 (B8000..BFFFF)
03B9 |*Write: Set Lightpen Flip-Flop (Eingang zum 6845 LPSTB)
03BA | Read: Display Status Port
| D0: 1 : HSYNC (Horizontal Retrace) luft gerade
|*D1: Ausgang des Lightpen Flip-Flop (LPSTB-Eingang 6845)
|*D2: 1 : Lightpen Taster gedrckt (Pin 3 des LP-Steckers)
| D3: Ausgang VIDEO zum Monitor (Dots on/off)
| D7: 1 : VSYNC (Vertical Retrace) luft gerade
03BB |*Write: Reset Lightpen Flip-Flop
03BC | Read: Latched Write Data
| Write: Printer Data D0..D7 (pin 2..9)
03BD | Read: Printer Status Port
| D3:0 : Printer Error (ERROR, pin 15)
| D4:0 : Printer deselected (SLCT, pin 13)
| D5:1 : Paper end (PE, pin 12)
| D6:1 : Ready for more (ACK, pin 10)
| D7:0 : Printer is busy (BUSY, pin 11)
03BE | Read (Latched Write Data)
| Write: Printer Control Port
| D0: Printer Strobe (0 = Strobe to Printer, 1 = Release Strobe) pin 1
| D1: 0 = Autolinefeed after CR, 1 = CR, LF (Programm) pin 14
| D2: 0 = Init Printer (pin 16), 1 = Release Init
| D3: 0 = Deselect Printer (SLCT, pin 17), 1 = Select Printer
| D4: 0 = Mask IRQ7 off, 1 = IRQ7 (ACK Flanke) mask on
03BF |*Read LPSTB extension Adress (Im Graphikmodus)
|*D0..D3 = xpos Dots MOD 16
|*D4: Dotclk 74112 (U58)
|*D5..D6 = ypos Dots MOD 4
|*D7: Aktive Graphikseite
| Write: Configuration Switch
| D0: Bit 1 03B8 AND-Mask (0: Kein Graphikmode einschaltbar)
| D1: Bit 7 03B8 AND-Mask (0: Keine Graphikseite 1 einschaltbar)
| (falls 0: B8000..BFFFF auf Graphikkarte abgeschaltet)
|
|
| CGA (Color Graphics Adapter)
03D4 | 6845 Index Register (siehe 03B4)
03D5 | 6845 Data Register (siehe 03B5)
03D8 |
| D0 : 1 = 80x25
| 0 = 40x25
| D1 : 1 = 320x200 Graphikmodus
| 0 = Alphanumerisch Text
| D2 : 1 = S/W
| 0 = Color
| D3 : 0 = Screen blanked
| D4 : 1 = 640x200 S/W Modus
| D5 : 1 = Blinken statt Intensittsbit (Bit 3)
| 0 = Intensittsbit fr 16 statt 8 Farben (2 Helligkeiten)
03D9 | Write: Paletteregister
| D0 : Blau
| D1 : Grn
| D2 : Rot
| D3 : Intensity
| D4 : 1 = Intensivfarbsatz im Graphikmodus
| D5 : 1 = Farbsatz 320x200 Modus aktivieren
03DA | Read: Statusregister
| D0 = HSYNC (Anzeige aktiviert)
| D1 = Lightpen Strobe Flip-Flop Ausgang
| D2 = Lightpentaster gedrckt
| D3 = VSYNC
03DB | Write: Reset Lightpen Flip-Flop
03DC | Write: Set Lightpen Flip-Flop
|
|
| Diskettencontroller uPD 765
03F2 | DIGOR (Digital Output Register) - Write
| D0..D1 : Laufwerk 00 = A, 01 = B, 10 = C, 11 = D
| D2 : 0 = RESET Signal aktiviert, 1 = RESET aus
| D3 : 1 = DMA und IRQ aktivieren
| D4..D7 : 1 = Motor fr Laufwerk A..D einschalten
03F4 | Hauptstatusregister - Read
| D0..D3 : Laufwerk A..D seeked noch
| D4 : 1 = BUSY
| D5 : 1 = DMA nicht aktiv
| D6 : 1 = Prozessor liest Datenregister, 0 = Prozessor schreibt Datenr.
| D7 : 1 = Register bereit fr Datentransfer
03F5 | Diskettensteuerungsdatenregister - Write
| D0..D7 : Command
| C5 = write (hd+drv.b,cyl.b,frst_sec.b,byte_p_sec.b,last_sec.b,
| gap.b, dtl.b)
| E6 = read (hd+drv.b,cyl.b,frst_sec.b,byte_p_sec.b,last_sec.b,
| gap.b, dtl.b)
| 4D = format (byte_p_sec.b, last_sec.b, gap.b, dtl.b)
| hd+drv.b : D5..D2 = Head, D1..D0 = Drive
| Nach jedem Kommando kann solange BUSY=1 ist, ein Statusbyte bei
| 03F5 abgeholt werden (warten bis D6=1 und D7=1 in 03F4).
| Status:
| D7 = rnf, timeout
| D6
| D5 = crc error
| D4 = dma error
| D3
| D2 = rnf
| D1 = write protected
| D0 = bad addr mark
|
03F6 | Harddisk Control Register
| D7 : 1 = Disable Retries
| D6 : 1 = Kein ECC bei Fehler
| D5 :
| D4 :
| D3 : 1 = Falls anz. Heads > 8
| D2 : 1 = RESET KONGO CARD (wieder auf 0 setzen)
| D1 :
| D0 :
|
03F7 | DIGIR (Digital Input Register) - Read
| D7 : 1 = Media changed
|
|
| RS232C Adapter 8250 (COM1) Generiert IRQ 4
03F8 | DLAB = 0
| Read: Receivebuffer (RBR = receive buffer register)
| Write: Transmitbuffer (THR = transmit holding register)
| DLAB = 1 : Read/Write: Divisor Latch LSB Read/Write
03F9 | DLAB = 1 : Read/Write: Divisor Latch MSB Read/Write
| Baud = 115200/divisor (clk = 1.8432 MHz DIV 16)
| DLAB = 0 : Interrupt Enable Register (IER) Read/Write
| Bit = 1: Interrupt enabled, Bit=0: Interrupt disabled
| D0: Receive Char Interrupt
| D1: Transmitter empty Interrupt
| D2: Receiver Line Status Interrupt (Framing, Parity, Overrun, Break)
| D3: Modem Status Interrupt (CTS, DSR, RI, DCD changed)
| D4..D7 = 0
03FA | Interrupt Identification Register (IIR) Read/Write
| Prios: 1=Receiver Line Status, RX available, THR empty, 4=Modem Status
| D0 = 0: Interrupt pending
| D1..D2: Interrupt source (falls D0 = 0)
| Prio D21 Source Cleared by
| 1 01 Overrun, Parity, Framing, Break Read LSR
| 2 10 Receive data available Read RBR
| 3 11 THR empty Read IIR oder Write THR
| 4 00 CTS, DSR, RI, RLSD changed Read MSR
03FB | Line Control Register (LCR) Read/Write
| D0..D1 : Wordlength (00=5, 01=6, 10=7, 11=8 Datenbits)
| D2 : 0 = 1 Stopbit
| 1 = 1.5 Stopbits, falls 5 Datenbits, 2 Stopbits sonst
| D3 : 1 = Parity generate & check enabled
| D4 : Falls D3 = 1 : 0 = Odd Parity, 1 = Even Parity
| D5 : Falls D3 = 1 und D5 = 1: 0 = Parity Mark, 1 = Parity Space
| D543 Funktion
| 000 Kein Parity
| 001 Odd Parity
| 010 Kein Parity
| 011 Even Parity
| 100 Kein Parity
| 101 Parity stuck on (1 = Mark)
| 110 Kein Parity
| 111 Parity stuck off (0 = Space)
| D6 : 1 = Send Break (Muss wieder auf 0 gesetzt werden)
| D7 : DLAB = 1 : Baudrate Divisor Latch Access ueber 0XF8/0XF9
03FC | Modem Control Register (MCR)
| D0: 1 = DTR aktiv
| D1: 1 = RTS aktiv
| D2: 1 = OUT1 aktiv (Pin 34)
| D3: 1 = OUT2 aktiv (Pin 31)
| D4: 1 = Diagnostic Mode:
| TX-Out --> RX-In (Local Loopback)
| RTS->CTS, DTR->DSR, OUT1->DCD, OUT2->RI internally connected
| Interupts lassen sich mit D0..D3 des MCR, bzw. D0..D5 des LSR
| auslsen (dann Bits wieder auf 0 und MCR auf 0).
03FD | Line Status Register (LSR) Read/Write
| D0: 1 = Character Received Interrupt 2
| D1: 1 = Receiver Overrun Error Interrupt 1
| D2: 1 = Parity Error Interrupt 1
| D3: 1 = Framing Error Interrupt 1
| D4: 1 = Break detected Interrupt 1
| D5: 1 = Transmitter Holding register empty Interrupt 3
| D6: 1 = Transmitter complete cleared (THR & TSR empty)
| D7: 0
03FE | Modem Status Register (MSR) Read/Write
| D0: 1 = CTS changed since last MSR read Interrupt 4
| D1: 1 = DSR changed since last MSR read Interrupt 4
| D2: 1 = RI changed from active to inactive Interrupt 4
| D3: 1 = DCD changed since last MSR read Interrupt 4
| D4: CTS input (Diagnostic: RTS)
| D5: DSR input (Diagnostic: DTR)
| D6: RI input (Diagnostic: OUT1)
| D7: DCD input (Diagnostic: OUT2)
03FF | Reserviert
|
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