IBM Personal System/2 Model 40 SX
General information
Machine type: 8540
Announce date: June, 1991
Excerpt from the original announcement letter;
" The Personal System/2 (R) (PS/2 (R)) Model 40 SX system unit is an enhanced version of the IBM PS/2 Model 30 286 and features the 80386SX microprocessor, 2MB system board memory (expandable to 16MB on planar), new 3.5-inch DASD options, five slots and four bays and 16-bit video graphics array (VGA). The 80386SX microprocessor operates at 20MHz with zero to two wait states to system memory. "
System characteristics
Microprocessor: Intel 80386sx (32 bit)
Clock speed: 20 Mhz, 0-2 wait states
Coprocessor: socket for optional i80387 math coprocessor
Type of BUS: 16-bit (AT BUS)
Total number of expansion slots: 5
Ports: PS/2 keyboard, PS/2 mouse, serial, parallel, VGA
Memory
Min/Max on system board: 2/16MB
Type of memory:
RAM: DRAM (PS/2 72 pin SIMM) 85ns w. parity. (3 sockets, 2 available)
ROM: ?
Cache: n/a
Physical description
Power supply: 197w, 110/220VAC switchable
Weight: 12.6kg (27.8 lbs) (Diskette and hardfile model)
Dimensions (HxWxD): (169 x 440 x 394mm)
Mass storage
Drive bays: 4 (1 x 3.5", 3 x 5.25")
Floppy Disk
Size: 3.5 inch slim-height
Capacity: 1.44MB
Hard disk
Size: 3.5 inch half-height
Capacity: 0MB (model 040), 40MB (model 043), 80MB (model 045)
Access time: 17ms
Interface: AT-IDE
Display
Size:
Display type:
Graphics modes supported: Integrated 16-bit VGA Display adapter
Keyboard
Type: 101 key enhanced or 122 key host connect
Software
Operating system: IBM PC DOS Versions 3.30, 4.01, 5.0, OS/2 1.3EE, OS/2 1.3SE or higher
Configurations
Various memory, diskette drive, hard drive, monitor, and keyboard configurations including;
8540-040 - 386sx20,2MB,1.44MB
8540-043 - 386sx20,2MB,40MB,1.44MB
8540-045 - 386sx20,2MB,80MB,1.44MB
Options
IBM Personal System/2 8MB Memory Module Kit-80ns 1401 6450129
IBM Personal System/2 4MB Memory Module Kit-80ns 3933 87F9977
IBM Personal System/2 1MB Memory Module Kit-85ns 5212 6450603
IBM Personal System/2 2MB Memory Module Kit-85ns 5213 6450604
IBM Personal System/2 2MB Memory Module Kit-80ns 5214 6450608
IBM Personal System/2 2MB Memory Module Kit-70ns 0129 6450902
IBM Personal System/2 4MB Memory Module Kit-70ns 0128 6450128
IBM Personal System/2 8MB Memory Module Kit-70ns 5116 6450130
| Communications/Connectivity | Feature Number | Part Number |
| Serial/Parallel Adapter | 215 | 6450215 |
| IBM SDLC Communications Adapter | 1205 | 1501205 |
| IBM PC Network Adapter II | 1220 | 1501220 |
| IBM PC Network Baseband Adapter | 1221 | 1501221 |
| IBM Enhanced 5250 Display Station Emulation Adapter Kit, Version 2.2 | 2911 | 30F5383 |
| IBM Enhanced 5250 Emulation Adapter and Cable Kit | 5622 | 30F5622 |
| IBM S/370 (TM) Channel Emulator Card | 3200 | 6193413 |
| IBM 3278/3279 Emulation Adapter | 5050 | 53F6425 |
| IBM Realtime Interface Co-Processor (128KB) | 6165 | 85X2710 |
| IBM Realtime Interface Co-Processor (512KB) | 6166 | 85X2706 |
| IBM Realtime Interface Co-Processor Multiport (128KB) | 6241 | 00F5527 |
| IBM Realtime Interface Co-Processor Multiport, Model 2 (1MB) | 6590 | 33F8791 |
| IBM Realtime Interface Co-Processor RS-232C Interface Board | 6051 | 60X8738 |
| IBM Realtime Interface Co-Processor CCITT V.35 Interface Board | 6053 | 67X1256 |
| Description | Feature Number | Part Number |
| IBM Realtime Interface Co-Processor RS-422A Interface Board | 6064 | 67X1255 |
| IBM Realtime Interface Co-Processor 20 mA Current Loop Interface Board | 6066 | 67X1257 |
| IBM Realtime Interface Co-Processor 128K Memory Expansion | 6055 | 60X8199 |
| IBM Realtime Interface Co-Processor 512K Memory Expansion | 6161 | 76X1019 |
| IBM Realtime Interface Co-Processor Multiport 512K Memory Expansion | 6242 | 00F5529 |
| IBM Realtime Interface Co-Processor Multiport Four Port RS-422 Addition | 6243 | 09F1989 |
| IBM Realtime Interface Co-Processor Multiport Four Port RS-232 Addition | 6245 | 00F5530 |
| IBM Realtime Interface Co-Processor Surge Protection Adapter | 6361 | 53F2625 |
| IBM Realtime Interface Co-Processor 8 Port RS-232 Interface Board/A | 6362 | 53F2610 |
| IBM Realtime Interface Co-Processor 8 Port RS-422 Interface Board/A | 6363 | 53F2613 |
| IBM Realtime Interface Co-Processor Selectable Interface Board/A | 6365 | 53F2616 |
| IBM Realtime Interface Co-Processor 8 Port RS-232 Interface Board/A HML | 6206 | 33F5338 |
| IBM Realtime Interface Co-Processor 8 Port RS-422 Interface Board/A HML | 6207 | 33F5339 |
| IBM Realtime Interface Co-Processor Selectable Interface Board/A HML | 6208 | 33F5340 |
| IBM Token Ring Network 16/4 Adapter | 7367 | 25F7367 |
| IBM Token Ring Network PC Adapter II | 9858 | 25F9858 |
| IBM PC 5178-001 Network Translator Unit | 5178001 | |
| IBM PC 5841-001 1200 Baud Modem (external) | 5841001 | |
| IBM PC 5853-001 2400 Baud Modem (external) | 5853001 | |
| IBM PC 8228-001 Token-Ring Network Multi-Station Access Unit | 8228001 |
Plus many more IBM and 3rd party adapter cards...
Note: Options are no longer available from IBM.