DFI 486-OCV Plus User Manual page 7

• Supports VESA VL-Bus devices (2 VESA Master/
Slave)
ISA DMA Master access to local device
Local Master access to an ISA device
Fully compatible with VESA VL-Bus rev. 1.0
• Two 32-bit VL-Bus and eight 16-bit ISA slots
• Maximum card length
Full-length cards in all VL-Bus slots and in three
ISA slots
9.75" cards in three ISA slots
• Four layer PCB
• Baby AT size
• Operating temperature: 0
• One year limited warranty
Warning:
If your 486-OCV Plus system board is using a 486DX
50 CPU, we recommend that you do not install any
VL-Bus devices. The VL-Bus connectors, compliant
with VESA VL-Bus standard rev. 1.0, limit the speed of
a VL-Bus device operating across the connector
(e.g. an add-on board) to 40MHz.
The table below, based on the VESA VL-Bus
specification, shows the recommended number of
installed VL-Bus devices at various CPU speeds. This
table is only a recommendation, not a requirement. Any
VL-Bus add-on board must correspond with the CPU
speed, whether it is buffered or unbuffered.
CPU Speed Unbuffered
<= 33MHz 2 slots/2 devices 3 slots/3 devices
40MHz 1 slot/2 devices
>= 50MHz 0 slot/2 devices
486-OCV Plus
o o
C - 40 C
Buffered
not recommended
not recommended
Introduction u 1-3