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Diffstat (limited to 'system/shard-x86-at/7/doc/PORTS.PRT')
| -rw-r--r-- | system/shard-x86-at/7/doc/PORTS.PRT | 658 |
1 files changed, 658 insertions, 0 deletions
diff --git a/system/shard-x86-at/7/doc/PORTS.PRT b/system/shard-x86-at/7/doc/PORTS.PRT new file mode 100644 index 0000000..b8d336d --- /dev/null +++ b/system/shard-x86-at/7/doc/PORTS.PRT @@ -0,0 +1,658 @@ +#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. unver„ndert
+ | D2 1 = DMA-Control enabled
+ | D3 1 = R/W-Signal verkrzt
+ | D4 0 = Feste Kanalprios, 1 = Kanalprios rotieren
+ | D5 Falls D3 = 0, 1 = verz”gertes R/W-Signal, 0 = verl„ngertes 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. unver„ndert
+ | D2 1 = DMA-Control enabled
+ | D3 1 = R/W-Signal verkrzt
+ | D4 0 = Feste Kanalprios, 1 = Kanalprios rotieren
+ | D5 Falls D3 = 0, 1 = verz”gertes R/W-Signal, 0 = verl„ngertes 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 : Ausg„nge der 4 Monoflops Zeit = (24.2 + 0.011 * R(kOhm))us.
+ | D4..D7 : Ausl”setasten (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 = Tr„gerfrequenzkennung liegt an (DCD)
+ | D2 : TXCLK (Diagnostic)
+ | D3 : 0 = Sendebereitschaft liegt an (CTS)
+ | D4 : RXCLK (Diagnostic)
+ | D5 : 1 = Modemstatus„nderung (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 Modemstatus„nderungs 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 w„hlt Counter auf den sich D0..D5 beziehen)
+ | D0 : 0 = Counter 16 Bit Bin„r
+ | 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 ausw„hlen (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 ausgel”st
+ | 17: D0..D7 = Lowbits der Speicherstelle, bei der LPSTB ausgel”st
+03B8 | Write: Display Mode Control Port
+ | D1: 6845 muss nach einer Žnderung 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) l„uft 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) l„uft 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 Intensit„tsbit (Bit 3)
+ | 0 = Intensit„tsbit 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
+ | ausl”sen (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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