PORTIBM PC Portable (uses same BIOS as XT) 0240-024F - Gravis Ultra Sound by Advanced Gravis Range: The I/O address range is dipswitch selectable from: 0200-020F and 0300-030F 0210-021F and 0310-031F 0220-022F and 0320-032F 0230-023F and 0330-033F 0240-024F and 0340-034F 0250-025F and 0350-035F 0260-026F and 0360-036F 0270-027F and 0370-037F SeeAlso: PORTIBM PC Portable (uses same BIOS as XT) 0340h-034Fh,PORTIBM PC Portable (uses same BIOS as XT) 0746h 0240 -W Mix Control register (see #P0545) 0241 R- Read Data 0241 -W Trigger Timer 0246 R- IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. Status Register (see #P0546) 0248 RW Timer Control Reg Same as ADLIB Board (see PORTIBM PC Portable (uses same BIOS as XT) 0200h) 0249 -W Timer Data (see #P0547) 024B -W IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. Control Register (0240 bit 6 = 1) (see #P0548) 024B -W DMAsee Direct Memory Access Control Register (0240 bit 6 = 0) (see #P0549) 024F RW Register Controls (rev 3.4+) Bitfields for Gravis Ultra Sound mix control register: Bit(s) Description (Table P0545) 6 Control Register Select (see 024B) 5 Enable MIDI(Musical Instrument Digital Interface) A standardized interface for controlling musical instruments with a computer. Loopback 4 Combine GF1 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. with MIDI(Musical Instrument Digital Interface) A standardized interface for controlling musical instruments with a computer. IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 3 Enable Latches 2 Enable MIC IN 1 Disable LINE OUT 0 Disable LINE IN SeeAlso: #P0546 Bitfields for Gravis Ultra Sound IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. status register: Bit(s) Description (Table P0546) 7 DMAsee Direct Memory Access TC IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 6 Volume Ramp IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 5 WaveTable IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 3 Timer 2 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 2 Timer 1 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 1 MIDI(Musical Instrument Digital Interface) A standardized interface for controlling musical instruments with a computer. Receive IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 0 MIDI(Musical Instrument Digital Interface) A standardized interface for controlling musical instruments with a computer. Transmit IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. SeeAlso: #P0545,#P0548,#P0549 Bitfields for Gravis Ultra Sound timer data: Bit(s) Description (Table P0547) 7 Reset Timr IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 6 Mask Timer 1 5 Mask Timer 2 1 Timer 2 Start 0 Timer 1 Start SeeAlso: #P0546,#P0548 Bitfields for Gravis Ultra Sound IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. control register: Bit(s) Description (Table P0548) 6 Combine Both IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 5-3 MIDI(Musical Instrument Digital Interface) A standardized interface for controlling musical instruments with a computer. IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. Selector 000 No IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 001 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 2 010 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 5 011 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 3 100 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 7 101 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 11 110 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 12 111 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 15 2-0 GF1 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. Selector 000 No IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 001 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 2 010 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 5 011 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 3 100 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 7 101 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 11 110 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 12 111 IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. 15 SeeAlso: #P0546,#P0549 Bitfields for Gravis Ultra Sound DMAsee Direct Memory Access Control Register: Bit(s) Description (Table P0549) 6 Combine Both DMAsee Direct Memory Access 5-3 DMAsee Direct Memory Access Select Register 2 000 No DMAsee Direct Memory Access 001 DMAsee Direct Memory Access 1 010 DMAsee Direct Memory Access 3 011 DMAsee Direct Memory Access 5 100 DMAsee Direct Memory Access 6 101 DMAsee Direct Memory Access 7 2-0 DMAsee Direct Memory Access Select Register 1 000 No DMAsee Direct Memory Access 001 DMAsee Direct Memory Access 1 010 DMAsee Direct Memory Access 3 011 DMAsee Direct Memory Access 5 100 DMAsee Direct Memory Access 6 101 DMAsee Direct Memory Access 7 SeeAlso: #P0546,#P0548,#P0591