TECHNICAL INFORMATION
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SYSTEM TIMERS
BISON II has three programmable
timer/counters controlled by Headland chipset and
they are defined as channels 0 through 2:
Channel 0
System Timer
Gate 0
Tied on
Clk in 0
1.190 Mhz OSC
Clk out 0
8259 IRQ 0
Channel 1
Refresh Request
Generator
Gate 1
Tied on
Clk in 1
1.190 Mhz OSC
Clk out 1
Request Refresh Cycle
Summary of Contents for BISON II
Page 1: ...BISON II...
