1 - Al Kossow's Bitsavers

TMS49648192·WORD BY 8·BIT READ·ONLY MEMORYread cycle timingIIAO-A1101-08:::~------------------------------------~~~-------------I tV(A)--.J I.-- 1IIEli; ---~:--\I. I : I:I ~I ____________________________________________ ~I-J I::: _____ =-II -.I ,.-- tdisI --f ta(S) r-- I I'.(A, ¢ VALID •IPROGRAMMING DATAPROGRAMMING REQUIREMENTS: The TMS4964NL is a fixed program memory in which the programming is performedby TI at the factory during the manufacturing cycle to the specific customer inputs supplied in the format below. The deviceis organized as 8192 8-bit words with address locations numbered 0 to 8191. The 8-bit words can be coded as a 2-digithexadecimal number between 00 and FF. All data words and addresses in the following format are coded in hexadecimalnumbers. In coding all binary words must be in positive logic before conversion to hexadecimal. Q1 is considered the least·significant bit and Q8 the most signific~nt bit. For addresses, AO is least significant bit and A 11 is the most significant.The input media containing the programming data can be in the form of cards or EPROMs.(I)Q)CJ'S;Q)c:?!oc:Either 16K, 32K, or 64K EPROMs can be used or any combination of them.The following is a description of how the cards must be formatted, should they be used instead of EPROMs.INPUT CARD FORMATEach code deck submitted by customer shall consist of the following:1. Title Card2. Comment Cards3. Start of Data Card4. Data CardsThe cards shall be standard 80 column cards with the information in the following format:TEXASINSTRUMENTSPOST OFFICE BOX 225012 • DALLAS, TEXAS 752657-23