NATURAL MICROSYSTEMS CORPORATION
AG-8, AG-8/F
Card Type | Telephony |
Chip Set | TI TMS320C51 |
I/O options | MVIP bus, serial port |
Processor | 80386SX |
Processor Speed | 16/25MHz |
Maximum Onboard Memory | 512KB DRAM/256KB SRAM |
Data Bus | 16-bit ISA |

CONNECTIONS | |||
Function | Label | Function | Label |
RS-232 port (see pinout below) | E43 | Lines 3 & 4 | CN2 |
MVIP bus | JP5 | Lines 5 & 6 | CN3 |
DSP daughterboard | JP7 | Lines 7 & 8 | CN4 |
Mini-ISA daughterboard | JP8 | Power, ground, and signaling | CN5 |
Lines 1 & 2 | CN1 | ||
E43 PINOUT | |
Pin | Function |
1 | Ground |
2 | Transmit |
3 | Receive |
4 | Ground |
SRAM BANK 0 | |
Size | Bank 0 |
32KB | (4) 16K x 4 |
128KB | (4) 64K x 4 |
SRAM BANK 0 CONFIGURATION | |||
Size | R66 | R67 | R68 |
32KB | Installed | Installed | Not installed |
128KB | Not installed | Not installed | Installed |
SRAM BANK 1 | |
Size | Bank 1 |
32KB | (4) 16K x 4 |
128KB | (4) 64K x 4 |
SRAM BANK 1 CONFIGURATION | |||
Size | R63 | R64 | R65 |
32KB | Installed | Installed | Not installed |
128KB | Not installed | Not installed | Installed |
BASE I/O ADDRESS (FIRST DIGIT) | |||
Setting | S1/1 | S1/2 | S1/3 |
0 xxx h | On | On | On |
2 xxx h | Off | On | On |
4 xxx h | On | Off | On |
6 xxx h | Off | Off | On |
8 xxx h | On | On | Off |
A xxx h | Off | On | Off |
C xxx h | On | Off | Off |
E xxx h | Off | Off | Off |
BASE I/O ADDRESS (LAST THREE DIGITS) | |||
Setting | S1/4 | S1/5 | S1/6 |
x 100h | On | Off | Off |
x 180h | Off | On | Off |
x 1A0h | Off | Off | On |
x 1C0h | Off | On | On |
x 280h | On | On | Off |
x 2A0h | On | Off | On |
x 2C0h | On | On | On |
x 340h | Off | Off | Off |

DIAGNOSTIC LED(S) | |||
LED | Color | Status | Condition |
D1 | Red | On | Task processor 1 request in progress |
D1 | Red | Off | Task processor 1 request not in progress |
D1 | Green | On | Task processor 1 grant in progress |
D1 | Green | Off | Task processor 1 grant not in progress |
DIAGNOSTIC LED(S) (CON’T) | |||
LED | Color | Status | Condition |
D2 | Red | On | Task processor 2 request in progress |
D2 | Red | Off | Task processor 2 request not in progress |
D2 | Green | On | Task processor 2 grant in progress |
D2 | Green | Off | Task processor 2 grant not in progress |
D3 | Red | On | MVIP processor request in progress |
D3 | Red | Off | MVIP processor request not in progress |
D3 | Green | On | MVIP processor grant in progress |
D3 | Green | Off | MVIP processor grant not in progress |
D4 | Red | On | Processor is reset |
D4 | Red | Off | Processor is not reset |
D4 | Green | On | SRAM is "not busy" |
D4 | Green | Off | SRAM is "busy" |
D5 | Red | On | Processor is transmitting data |
D5 | Red | Off | Processor is receiving data |
D5 | Green | On | Host is reading/writing to SRAM |
D5 | Green | Off | Processor is reading/writing to SRAM |
D6 | Red | On | DSP chips are reset |
D6 | Red | Off | DSP chips are not reset |
D8 | Green | On | Diagnostics are being performed |
D8 | Green | Off | Diagnostics are not being performed |
D9 | Green | On | External power supply is on |
D9 | Green | Off | External power supply is off |