– Two 72-pin system memory sockets (one is populated with
either a 2MB or 4MB SIMM). Memory speed is 70 ns.
Maximum memory is 32MB. Refer to “System Memory” on
page 1-20 and to “System Board Layouts” on page 5-2.
– 512K video RAM soldered on the system board (not field
upgradeable).
– Ports include: two serial, parallel, keyboard, mouse, and video.
– Connectors for AT riser card (120-pin), input power (12-pin), AT
diskette drives (34-pin), IDE AT hard disk drives (40-pin), and
power LED/hard disk LED (4-pin).
– Lithium battery.
486SX—33MHz processor (72-pin memory SIMM)
Three system boards available:
1. 2MB SIMM for system memory, 128K external cache, upgrade
processor socket. Refer to “System Memory” on page 1-20
and to “System Board Layouts” on page 5-2.
2. 4MB SIMM for system memory, 128K external cache, upgrade
processor socket.
3. 4MB SIMM for system memory, 0 external cache, upgrade
processor socket.
Each system board contains:
– Supports 8K internal cache.
– Supports 0, 128K, or 256K external cache (field upgradeable).
Shipped with 0 or 128K standard.
– Two or four 72-pin system memory sockets (one is populated
with either a 2MB or 4MB SIMM). Memory speed is 70 ns.
Maximum memory is 32MB or 64MB (depending on the
number of SIMM sockets). Refer to “System Memory” on
page 1-20 and to “System Board Layouts” on page 5-2.
– 1MB video RAM soldered on the system board (not field
upgradeable).
– Ports include: two serial, parallel, keyboard, mouse, and video.
– Connectors for AT riser card (120-pin), input power (12-pin), AT
diskette drives (34-pin), IDE AT hard disk drives (40-pin),
power LED/hard disk LED (4-pin), and video feature (26-pin).
– Lithium battery.
486DX—33MHz processor (72-pin memory SIMM)
Two system boards available:
1. 238-pin processor socket
General Information 1-7
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