user manual

The first four bytes, Base+0 through Base+3, of address space on the MPA-100 contain

the internal registers of the SCC. The next two locations Base+4 and Base+5 contain the

Communications Register and the Configuration Register. The last two address port locations

are reserved for future use. The entire address range of the MPA-100 is shown in Table 2.

Table 2 MPA-100 Address Assignments

ReservedBase + 7

ReservedBase + 6

Configuration RegisterBase + 5

Communications RegisterBase + 4

SCC Control Port, Channel BBase + 3

SCC Data Port, Channel BBase + 2

SCC Control Port, Channel ABase + 1

SCC Data Port, Channel ABase + 0

Information on the internal registers of the SCC can be found in Section 6. The two

onboard registers give the user additional options pertaining to DMA, interrupts and the

RS-232-D standard for communication. Information on the Configuration Register and the

Communications Register can be found in Section 8, and Section 9.

MPA-100 User's Manual 3-2