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>> PIN switch on a mobo for IRQ settings (PRE IPv4) >Yeah even I’m fucking totally lost on this one --- You dont recall on a 286? Having to swap DIP PIN swi
by samstave 4y ago
>> PIN switch on a mobo for IRQ settings (PRE IPv4)
>Yeah even I’m fucking totally lost on this one
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You dont recall on a 286? Having to swap DIP PIN switches on the motherboard to establish the IRQ port the card in said slot was going to use?
IRQ3 was typically the modem...
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You were etching PCBs in your basement
I was flipping DIP SWITCHES.
Different era of education there...
- danachow 4y agoI know what DIP switches or configuration pin headers do. For one, I've never heard them referred to as DIP PIN switches like PIN is some kind of acronym - perhaps DIP pin switch is some kind of regionalism. But that was not the confusion: >> "Ask a new hot shot programmer to do dip-switches and IRQs etc"... Ok. >> let alone be able to tell you a PIN switch on a mobo for IRQ settings (PRE IPv4) After the first part about dip-switches and IRQs this makes it sound like "PIN switch" is something distinct. Further confusing, I still have no idea what PRE IPv4 means here. The only IPv4 I've heard of is internet protocol and not something I would associate with PC hardware configuration. (IPv4 was released pretty much at exactly the same time as the original IBM PC in 1981). > IRQ3 was typically the modem IRQ3 was more specifically the 2nd set of serial UARTs COM2/COM4 - with the IO base port assignment 2F8h and 2E8h. COM1/COM3 was IRQ 4 (base ports 3F8h, 3E8h). So a modem may very well been on IRQ 4. In practice it was often dependent on whether one was a using a serial vs PS/2 mouse.