We had 2 channel attached 2848s with a total of 6 x 2260s ( and 2 x 1053 golfball printers)... I don't know if all 2260s were, but ours most definetley were white. ( they did have black and white cathode ray tubes then!)j The 2260 was a bit like a 480 byte card reader/punch to use... None of that protected (or in fact attribute byte at all!) business. It also had an erase write ( erase screen and write the data buffer from position 1) or a write command ( write data from where-ever the cursor was) . The most magnificant thing I recall about the 2260 was that it's keyboard was closely related to the 1052's keyboard, where a locked keyboard meant just that... The keys would not physically go down if you pressed them !. ( whoppee! A vdu with moving parts !!!)
It also had a 'write at line' ccw opcode, where it used the first byte in the data steam as the line (row) number to start writing at... It was usefull for the games of 'LIFE' and Battleships which I, too wrote as an operator. When I became a programmer I got given the job of changing all of our 2260-using programs to use the new 3277s I soon discovered that the 3277s were just a teeeney bit more sophisticated ! i.e. these two type of VDUs did not work anything like each other at all (even vaguely!) the only similarity being that they both generated an "Attention" interrupt that DOS(or DOS/VS) did not natively handle. ( thank heaven for DUCS!) It was all Such fun ! But I did it . Phil Steele *********************************************************************************** The information in this e-mail message and any files transmitted with it are intended to be confidential and for the use of only the individual or entity to whom they are addressed. The message and files may be protected by legal professional privilege, or other legal rules. The confidentiality of and privilege applying to this message and files is not waived if this message or files has been sent to you by mistake. If the reader of this message or files is not the intended recipient, you are notified that retention, distribution or copying of this message and files are strictly prohibited. If you receive this message or files in error, please notify us immediately by telephone or return e-mail and delete all copies from your computer system. It is the recipient's responsibility to check this message and files for viruses. Thank you. *********************************************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
