IBM 6731 Diskette Module

Don R organlists1 at
Wed Jan 19 09:53:08 CST 2022

My curiosity is “what kind” of boot program did they use,  was it some sort of PC Dos incarnation?

There’s very little info left in IBM’s archives.

I also suppose the IBM Modularity option which plugs into the CPU board of the electronic typewriter, but that too is an educated guess on my part.

Don Resor

Sent from someone's iPhone

> On Jan 19, 2022, at 7:32 AM, Peter Coghlan via cctalk <cctalk at> wrote:
> On Wed, 19 Jan 2022 at 04:06:59 -0800, D. Resor via cctalk wrote:
>> There was also a 5.25" diskette which was nicknamed "IPL" for "initial
>> program load", and an interface board which was installed into the
>> typewriter and was referred to as the "IBM Typewriter Modularity Option".
> Hi Don,
> Apologies if you know this already but IPL / initial program load
> is IBM-speak for "boot".
> Regards,
> Peter Coghlan.

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