All my content and ptohos
Serial port cards
These expansion boards were used in mainframe computers to connect many terminals to one mainframe. Usually they gave 4, 8 or 16 serial ports. Not many operating systems supported more than 4 serial ports well - usually some Unix editions were OK. Some models were supported by DOS network environments, other ones with Windows NT.
WARNING! This page contains high-resolution photos, sometimes over 250kB!
| Specialix SI-EISA serial board | ||
| Manufactured by: Specialix |
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| Type: 8 RS232 card | ||
| Interface: EISA | ||
| This card was working in 486 server with another one based on ISA. | ||
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Rear and splitter box - it's quite complex, and allows to chain another one. Notice cable's thickness. |
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| Specialix IO-4 | ||
| Manufactured by: Specialix |
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| Type: 4 RS232 card | ||
| Interface: 16-bit ISA | ||
| This one is in very good condition, in a box, with manual and cable. Bags are sealed as it left factory. | ||
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(rear, box and its contents) |
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| Unknown 4-port board | ||
| Manufactured by: ?? |
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| Type: 4 RS232 +2 parallel ports card | ||
| Interface: 8-bit ISA | ||
| I have no idea about this one. I found it in electronics junk from USA. I have 4 these cards, all the same. | ||
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| Olivetti multi-port card? | ||
| Manufactured by: Olivetti |
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| Type: Probably multi-RS232 + one RS485 card ? | ||
| Interface: 16-bit ISA | ||
| I found
this one in electronics junk collected from server rooms. I
don't know much about it. Notice similarity with Siemens like-ISDN card. |
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| SI-Host | ||
| Manufactured by: Specialix |
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| Type: 8 RS232 ports card | ||
| Interface: 16-bit ISA | ||
| Another multiport card from 486 server. | ||
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| (rear and 8-plugs cable) | ||
| SI-XIO | ||
| Manufactured by: Specialix |
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| Type: 4 RS232 ports card | ||
| Interface: 16-bit ISA | ||
| This one was in this 486 server as spare unit. | ||
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| SCB 1.0 | ||
| Manufactured by: Siemens Nixdorf |
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| Type: ISDN modem and RS232 card | ||
| Interface: 16-bit ISA | ||
| I got this card from my friend as damaged LAN adapter. Well, Siemens Nixdorf SCB is not a LAN adapter. This card has 2 fuctions: it acts as ISDN modem and allows to share it in multiple serial ports. I got a 8-tailed cable for it, but I don't know wili it work because I have no drivers for it and it seems taht there aren't any drivers for it on the net. This card has a boot-ROM which allows for serial port diagnostics. | ||
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