RAM chips of type 41128 are used, of an access time rating of 150 ns (or faster). Provides 512 KB of extended memory, via two banks of 256 KB.Ĭlick here to see the layout of the two banks on the card. Optionally supplied in the early model 5170s. That error is on document page 20, where "Port 1" has been labelled as "Port 2", and vice-versa.Īccordingly, the first one of these cards in your 5170 should be configured per the photo below (Serial port 1 / Parallel port 1).Ī serial port configuration of 'Port 1' corresponds to I/O base address 3F8 and interrupt 4.Ī serial port configuration of 'Port 2' corresponds to I/O base address 2F8 and interrupt 3.Ī parallel port configuration of 'Port 1' corresponds to I/O base address 378 and interrupt 7.Ī parallel port configuration of 'Port 2' corresponds to I/O base address 278 and interrupt 5. There is an error in that documentation in regard to the setting of jumper J2 - parallel port address/interrupt. The printer port is what later became referred to as a 'standard parallel port' (SPP) - see here.Ĭlick here to see IBM's technical document for the card. Up to two of these cards (configured appropriately) may be fitted in the 5170. Combined serial port (of type RS232) and parallel port on one card.
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