ACB.TXT - SeaMAC SDLC / HDLC Synchronous Serial Port Driver Notes ACB Developers Toolkit 1995 ---------------------------------------------------------------------- ---------------------------------------------------------------------- This file contains jumper information regarding DMA and clocking options relative to using the SeaMAC driver. ---------------------------------------------------------------------- ---------------------------------------------------------------------- ACB-III The highest data rate obtainable by this card is limited by the RS-232 line drivers and receivers. RS-232 specifies a maximum limit of 20Kbps at 50 feet, however greater data rates can be reached with shorter cable distances. The references in the manual to Transmit Signal Element Timing (TSET) correspond to Terminal Timing (TT) on the ACB-III. The recommended DMA jumper settings for the ACB-III are: Rx Ch A DMA = 1 E4: 1,4 E5: 1,4,6 Tx Ch A DMA = 3 DMA is always enabled E9: 1 IRQ 5 ---------------------------------------------------------------------- ---------------------------------------------------------------------- ACB-IV This card is very similar to the ACB-III in configuration options and available systems resources. The main difference between the ACB-III and the ACB-IV is that the ACB-IV is RS-422, not RS-232. The ACB-IV, like the ACB-530 and ACB-VI can also be used with a RS-485 interface. The ACB-IV, because of the differential drive capabilities of RS-422 and 485 can communicate at much higher data rates than the ACB-III. The ACB IV is EIA-530 compatible. Rx Ch A DMA = 1 E3: 1,4 E5: 1,4,6,7 Tx Ch A DMA = 3 DMA is always enabled Supports RS-485 with E2 position "E" on and an ESCC Z85230 upgrade IRQ 5 ---------------------------------------------------------------------- ---------------------------------------------------------------------- ACB-V The ACB-V is also similar to the ACB-III and ACB-IV. The ACB-V provides a CCITT V.35 interfaces. The ACB-V however, unlike the ACB-III and ACB-IV, will not generate an output clock signal. This is because the CCITT V.35 specification does not specify a clock output signal for a V.35 DTE. If you require an output clock signal with your V.35 interface, please refer to the ACB-VI or the ACB-56. The ACB-V is also compatible with CCITT V.36 and V.37. Rx Ch A DMA = 1 E2: 1,4 E1: 1,4,6,7 Tx Ch A DMA = 3 DMA is always enabled IRQ 5 Does not support an output clock ---------------------------------------------------------------------- ---------------------------------------------------------------------- ACB-VI The next member of the ACB product family combines many of the key features of the earlier ACB family members. The ACB-VI supplies the user with a user selectable RS-232 / RS-422 / RS-485 / EIA-530 / CCITT V.35 / MIL-188 114 / MIL-188 C high speed communication port. When using the CCITT V.35 interface of the ACB-VI, channel A of the SCC can supply a clock signal at V.35 signal levels. This is not normally available with other V.35 DTE devices. Rx Ch A DMA = 1 E9: A,B,D,M ("C" if output clock, see manual) Tx Ch A DMA = 3 E16: 000000|| E15: 00||0000 DMA is always enabled Set Options=IRQEnable in configuration file Supports RS-485 with E9 position "E" on and an ESCC Z85230 upgrade IRQ 5 ---------------------------------------------------------------------- ---------------------------------------------------------------------- ACB-530 The ACB-530 supports EIA-530 interface, much like the ACB-IV. The ACB-530 offers additional IRQ and DMA options that the ACB-IV does not offer. The ACB-530 can be configured for IRQ 2, 3, 4, 5, 7, 10, 11, 12, and 15. This adapter can also be configured for DMA channels 0, 1, 2, or 3. The ACB-530 is RS-422 and RS-485 compatible. Rx Ch A DMA = 1 E2: A E4: 000000|| E6: None Tx Ch A DMA = 3 E5: 00||0000 E7: None DMA is always enabled Supports RS-485 with E8 position "E" on and an ESCC Z85230 upgrade IRQ 5 ---------------------------------------------------------------------- ---------------------------------------------------------------------- ACB-56 The ACB-56 supports a interface that is user selectable between RS-232 and CCITT V.35. The ACB-56 supports the additional IRQ signals that the ACB-III, and ACB-V do not support (2/9,3,4,5,7,10,11,12,15). The ACB-56 is V.36 and V.37 compatible. Rx DMA = 1 E1: 1,4 E7: 1,4,6,7 Tx DMA = 3 DMA is always enabled IRQ 5 ---------------------------------------------------------------------- ---------------------------------------------------------------------- ACB-104 The ACB-104 was designed to allow existing ACB based applications to be used on an expansion bus other than the PC / AT / ISA bus. The ACB-104 was designed to function on the PC/104 bus. This bus is used in embedded applications because of its small form factor. The ACB-104 features RS-232 and RS-422 / 485 versions that have IRQ 2, 3, 4, 5, and 7 as selectable interrupts. This product is offered in RS-232 and RS-422/485. Rx DMA = 1 E1: A,B,D Tx DMA = 3 DMA is always enabled Supports RS-485 with E1 position "E" on and an ESCC Z85230 upgrade IRQ 5 ---------------------------------------------------------------------- ---------------------------------------------------------------------- The following cards are not supported by this driver at this time: ACB-II, ACB-MP, PC-ACB, MAXPORT, ACB-188