pourer | hard disk | diskette | power |
(SPEED) light | access light | drive | bWon |
hay for hard disk. diskette, tape,
110/220 VAC switch | option card slots |
power | keyboard | serial serial | \ | VGA |
inlet | port | port 1 port 2 | monitor | |
| mouse |
| parallel | port |
| port |
| port | |
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|
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Computer Specifications
CPU and Memory4DX/33: Intel i486DX, 33 MHz microprocessor; can be replaced with optional
4DX2/50: Intel i486DX2, 50 MHZ microprocessor
System speed High and low speeds available; high speed depends on CPU (25 MHz, 33 MHz, or
50 MHz), low speed is simulated 8 MHz speed; speed selection through keyboard command; 0 wait state memory access at highspeed
| To select low speed, press the Ctrl, Alt, |
| and - keys simultaneously. To select |
| high speed, press the Ctrl, Alt, and + keys |
| simultaneously. (Use the - or + key on the |
| numeric keypad.) |
Memory | 4MB RAM standard on a SIMM; |
| expandable using 1MB, 4MB, or 16MB |
| SIMMs to 32MB (maximum); SIMMs must |
| be |
| (or faster) access speed |
ROM | 128KB system BIOS, video BIOS, and |
| SETUP code located in EPROM on main |
| system board |
Video RAM | 512KB or 1MB DRAM on main system |
| board; 512KB configuration expandable |
| to 1MB |
Shadow RAM | Supports shadowing of system and video |
| BIOS ROM into RAM |
Cache | 8KB of internal cache (built into the |
| microprocessor) |
Math | On 4DX/33 and 4DX2/50 systems, math |
coprocessor | coprocessor built into the microprocessor; |
| optional 487 upgrade available for 4SX/25 |
| system |
Clock/calendar | |
| RAM socketed on main system board with |
|
Video | Cirrus® VGA controller on main system |
| board; provides resolutions up to |
| 1024 x 768 |
D i s k e t t e | Controller on main system board supports |
| up to two diskette drives or one diskette |
| drive and one tape drive |
Hard disk | Interface on main system board supports |
| up to two IDE hard disk drives with |
|
Monitor | VGA interface built into main system |
| board for analog or multifrequency VGA |
| monitor; |
Parallel | One standard &bit parallel, uni- or bi- |
| directional interface built into main system |
| board; I/O address selectable through |
| SETUP; |
Serial | Two |
| asynchronous interfaces built into main |
| system board; |
4/1/93 | EPSON |