Programmable Timer/Counter; Direct Memory Access Channel (Dma) - Omega ISA- BUS MULTI-FUNCTIONAL BOARD OME-A822PG Hardware Manual

1.3.7 Programmable Timer/Counter

Type : 82C54 -8 programmable timer/counter
Counters : Counter1 and counter2 are cascaded as a 32 bit pacer timer.
Counter0 is a user available timer/counter. The software driver also uses
counter0 to implement a machine independent timer.
Clock input frequency : DC to 10 MHz
Pacer output : 0.00047Hz to 0.5MHz
Input ,gate : TTL compatible
Internal Clock : 2 MHz

1.3.8 Direct Memory Access Channel (DMA)

Level : CH1 or CH3, jumper selectable
Enable : via DMA bit of control register
Termination : by interrupt on T/C
Transfer rate : 100K conversions/sec.
OME-A-822PGL/PGH Hardware Manual ---- 7