Cache M E M O R Y Configuration Io; Vesa Vl-Bus Identifier - VESA 80486VESA User Manual

Cache Memory Configuration
There are two jumpers to be set for the cache memory selection
The jumper selections are as follows:
Note:
For 64K cadre,
U36, U37, U39, U40, U41, and U42.
For 128K cache, install 8Kx8 SRAM in locations 1143, a n d 3 2 K x 8
SRAM in locations U34, U35, U36, and U37.
For 256K cache install 32Kx8 SRAM in locations U43, U34,
U35, U36, U37, U39, U40, U41, and U42.
VESA VL-Bus Identifier Jumpers (JP19, JP20)
The identifier jumpers (JP19, JP20) allow VL-Bus slave to identify
the speed of the host CPU.
10
64K Open
128K 1-2
256K 2-3
Table 3: Cache Memory Configurations
install 8Kx8 SRAM in locations 1143, U 3 4 , 1135,
0 wait write min.
1 wait write min.
<=33MHz
> 33MHz
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80486VESA Users Manual