TI-59 Magnetis Card difference

[Paul Berger (Canada)]

Having seen the inside of a TI-59 card reader I do not see how it could be possible for it to do any kind of read after write checking. There is only one head and it cannot write and read at the same time, this is also true of the readers in HP 65, 67, 97 and 41. I am sure it is like a lot of things in computers where an operation is started and if the thing does not explode in flames, the operation is deemed successful.