The New York Times November 1, 1983, Tuesday, Late City Final Edition A SEESAW DAY FOR COMPUTERS BYLINE: By ANDREW POLLACK SECTION: Section D; Page 1, Column 3; Financial Desk LENGTH: 853 words Talk about chaos. The price of Texas Instruments stock shot up and the price of its home computer shot down yesterday in the wake of the company's withdrawal from the turbulent home computer market. The stock market traded nearly two million shares of Texas Instruments, and the price per share jumped $22.75, to $124.50. And for a while it seemed possible that some retailers, at least in Manhattan, were unloading the company's previously popular 99/4A home computer for as little as $20 each - if buyers managed to get rebates now being discontinued. Another Frenzy Possible As if all this was not enough, after the stock market closed, the International Business Machines Corporation said it would have a ''product announcement'' this morning. The experts assume it will be the introduction of the PC Junior, which carried the code name ''Peanut'' for many months. This long-awaited entry into the home computer market is likely to throw the industry into another frenzy. And even though Texas Instruments announced late Friday that it was abandoning the home computer market to such competitors as Atari, Coleco, Commodore and Tandy, the stock market did not go wild over any of those issues. Atari, widely assumed to be the weakest sister, and Coleco, actually dropped. As of yesterday, Commodore had sold 33 percent of the home computers under $1,000. Texas Instruments was second with an estimated 19 percent. Atari was third with 15 percent, Radio Shack had 10 percent and Timex had 7 percent, according to Future Computing, a market research firm in Richardson, Tex. I.B.M.'s Junior, will be more expensive than the home computers made by Texas Instruments, Atari and Commodore, and more competitive with Apple's IIe and even Coleco's Adam, now making a belated appearance on some store shelves. Two Versions The PC Junior is expected to come in two versions. One will have 64K bytes, or 64,000 characters, of internal memory and will have a wholesale price of $486, meaning it should sell retail for about $700 or $800. The other will have 128,000 characters of memory and a disk drive for additional storage and will sell for $864 wholesale, or about $1,200 to $1,300 retail. Analysts expect the computer to be a hit, partly because it will run some programs written for I.B.M.'s more expensive personal computer, the PC. That will make the Junior attractive as a home model for those who use the PC in the office. If the software industry begins writing programs for the Junior with the same gusto it did for the I.B.M. personal computer, then the Junior will become a standard and other manufacturers like Commodore and Atari will have to consider making computers compatible with it. If I.B.M. succeeds with ''the Peanut,'' it will do so by competing on the basis of its name and on the machine's usefulness. Previous competition in the industry has been on the basis of price, and has left many participants reeling. The withdrawal of Texas Instruments is expected to help I.B.M. because consumers are likely to want a company that will be in the business for the long run. $110.8 Million Loss Texas Instruments, which reported a third-quarter loss of $110.8 million on Friday, gained back about half the ground it lost in the stock market in June. That loss came after it first disclosed that it was losing money badly in the home computer business. The stock sold for $157.75 in June before the first announcement of losses and then dropped to as low as $101. But other home computer stocks had mixed results. Commodore, Texas Instruments' chief rival, gained $2.875, to $34.25, and the Tandy Corporation, which markets the Color Computer through its vast chain of Radio Shack stores, gained $1, to $36.625. But Warner Communications, parent of Atari, fell 12 1/2 cents, to $21.625, and I.B.M. itself was off $1.375, to 126.625. Coleco dropped 37 1/2 cents, to $25.375. Texas Instruments said late Friday that because of continuing losses it would stop making the 99/4A and cut prices to clear inventory. The computer had been selling for a $149 retail price plus a $50 rebate. The price is expected to drop to about $50, as the company ends its rebate. Bargain Hunters Out Retailers were already starting to mark down the computer and bargain hunters were out yesterday. A hand- drawn sign on the window of 47th Street Photo read: ''Special Today Only, TI 99/4A Now Only 69.95.'' ''I think the $69 price will definitely be an attraction,'' said Sam Lowenbein, a salesman. ''I think the computer will sell like hotcakes.'' The store was selling more than it did on the average day when the computer had been priced at $99. The wholesale price for the 99/4A has been $147, and is expected to drop to $47. Early on, there was a great deal of confusion about whether consumers would also get the rebate, meaning the computer would cost them only $20. A Texas Instruments spokesman said the rebate ended as of yesterday. a $149 retail price plus a $50 rebate. The price is expected to drop to about $50, as the company ends its rebate.