Difference between revisions of "DLV11-E asynchronous serial line interface"
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Like the ancestral [[KL11 asynchronous serial line interface|KL11]], the DLV11 has 2 device [[register]]s for the receive side (one Control and Status Register - CSR - and one data [[buffer]] register), and similarly, two for the transmit side. Each line has two [[interrupt vector]]s - again, one receive, and one transmit. | Like the ancestral [[KL11 asynchronous serial line interface|KL11]], the DLV11 has 2 device [[register]]s for the receive side (one Control and Status Register - CSR - and one data [[buffer]] register), and similarly, two for the transmit side. Each line has two [[interrupt vector]]s - again, one receive, and one transmit. | ||
| − | For the PDP-11 main console (which is always a KL11/DL11 compatible device), the standard is that 0777560 is the base address (so the receiver registers are 0777560-2, and the transmitter are 0777564-6), and 060 is the base vector. It can be set to [[halt]] the [[Central Processing Unit|CPU]], or [[bootstrap|re-boot]] the system, when a '[[asynchronous serial line|break]]' is seen. | + | For the PDP-11 main console (which is always a KL11/DL11 compatible device), the standard is that 0777560 is the base address (so the receiver registers are 0777560-2, and the transmitter are 0777564-6), and 060 is the base vector. It can be set to [[halt]] the [[Central Processing Unit|CPU]], or [[bootstrap|re-boot]] the system, when a '[[asynchronous serial line|break]]' is seen; it can also send a 'break'. |
The first line after the console is always assigned the address 0776500, and vector 0300. Additional lines are assigned addresses and vectors immediately following, for DL11's #1-#16 (i.e. 0776500-676 and 0300-0476). | The first line after the console is always assigned the address 0776500, and vector 0300. Additional lines are assigned addresses and vectors immediately following, for DL11's #1-#16 (i.e. 0776500-676 and 0300-0476). | ||
Revision as of 19:01, 27 July 2019
The DLV11-E asynchronous serial line interface card (M8017) was a QBUS peripheral for the PDP-11 series of computers which provided an asynchronous serial line on a single dual-width card.
It provided EIA RS-232 connectivity, at speeds of 50 to 19,200 baud; it also had full modem control. Line connection was via 40-pin Berg connector headers on the top edge of the card, using the standard DEC asynchronous serial line pinout.
Programing interface
Like the ancestral KL11, the DLV11 has 2 device registers for the receive side (one Control and Status Register - CSR - and one data buffer register), and similarly, two for the transmit side. Each line has two interrupt vectors - again, one receive, and one transmit.
For the PDP-11 main console (which is always a KL11/DL11 compatible device), the standard is that 0777560 is the base address (so the receiver registers are 0777560-2, and the transmitter are 0777564-6), and 060 is the base vector. It can be set to halt the CPU, or re-boot the system, when a 'break' is seen; it can also send a 'break'.
The first line after the console is always assigned the address 0776500, and vector 0300. Additional lines are assigned addresses and vectors immediately following, for DL11's #1-#16 (i.e. 0776500-676 and 0300-0476).
Layout
The 'Revison D' PCB layout is significantly different from the earlier ones; it is easy to recognize this version visually, as the large UART chip is parallel to the long axis of the card. This version is not covered in most DLV11-E documentation; it can be found in the "Microcomputer Products Handbook" (1985), on pg. 22-3.
