| Video memory is upgraded by installing a 256KBx16 70ns or 80ns DRAM ZIP at location U20. The ZIP needs to be ASYMMETRICAL (Write Enabled). |
| If the Motherboard had a DRAM chip at location (U22) the motherboard has 1M installed. If there is not a chip at Location (U22), insert a 256KBx16 ZIP at location (U20) to upgrade the video memory to 1MB. |
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| See Also PB410 Video Memory Upgrade |