ISA-card (was: PC-card)

From: Ruud Baltissen (
Date: 2001-05-16 07:43:57

Hallo allemaal,

The email of Ramses pointed me to the fact that the name "PC-card" could
cause confusion. As it is still in an experimental phase and the new name is
tells you more about the nature of the card and therefor will cause less
confusing, I changed the name to "ISA-card". Other ideas are still welcome.

Something about the status.

I did some results and made some assumptions:
- 16-bit I/O operations only use one single address which can be odd as
- all memory related cards are able to perfrom 8-bit transfers

By disabling 16-bit transfers to memory cards, I simplyfied the needed
boolean equations in such a way that they at least were handable and, very
important, they could be translated in hardware. I'm still in the proces of
minimizing the number of needed gates but I now can say it can be done!

Until yesterday I had some worries about the second 8237 but due to a remark
of Nick I solved that problem as well. Stil have some minor questions but
these are all about the actual design and use of (which) IC's.

Groetjes, Ruud

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