Ursus

I am a bit confused. ? TIPI Sidecar :::: >1000 I::: >1100 :I:: >1200 II:: >1300 ::I: >1400 I:I: >1500 :II: >1600 III: >1700 :::I >1800 I::I >1900 :I:I >1A00 II:I >1B00 ::II >1C00 I:II >1D00 :III >1E00 IIII >1F00 TIPI / 32k :::: >1000 I::: >1100 :I:: >1200 II:: >1300 ::I: >1400 I:I: >1500 :II: >1600 III: >1700 :::I >1000 mem-disable I::I >1100 mem-disable :I:I >1200 mem-disable II:I >1300 mem-disable ::II >1400 mem-disable I:II >1500 mem-disable :III >1600 mem-disable IIII >1700 mem-disable Is this correct? ? Thanks Ursus

Sorry, below the new text.

Don Bynum built the Z80 Rangers in response to the TI-99/4. Then his name appears on the two terminals: L00142 (1980 ?, T&P Division of Data Systems) and L00143 (1981). At the end of 1980 he became the head of the TI Home Computer Division. The TI-99 / 4A is launched on the market. And the TI-99/2 and TI-99/8 would also have come onto the market under his leadership. Amazing.

Could there be a possible connection to the SR-70?

I don't know anything about a TI 990/1. In 1973 the 990/9 was released as the first of the 990 series, at that time with TTL logic. It followed in 1975 as the successor to the 990/10 and in the same year the 990/4 for the first time with a TMS900 chip. Its successor was the 990/5 and 990 / 10A. The 990/12 (Schottky TTL) followed in 1979. Source: http://www.cozx.com/dpitts/ti990.html The numbering at TI is interesting because it seems to have been retained in the TI-99. Sorry, did you mean the DS990/1 with the 990/1? https://www.old-computers.com/museum/computer.asp?st=1&c=1025

Does anyone know if there was any connection between the SR-70 and the TI-99/7? The goal was very similar and there were only three years in between. I tried to compare the two, but neither the names of the engineers nor the hardware specification show a connection. ? Herman Schuurman by Klaus Lukaschek (Interview taken December 2015): Q) Can you describe your involvement in the TI-99/4 project? The Home Computer (99/4) project started about a year before I joined the team in Lubbock. I believe the original promotors of the project were Granville Ott and Len Donohoe. I was originally hired to work on the SR-70, a small scientific computer, but by the time I landed in Lubbock, that project had been moved to the Data Systems Group in Austin, and I was put to work on the SR-62, a small self-contained computer that shared most of its software with the Home Computer. In addition to the Home Computer stuff, the SR-62 had a small built-in monitor and a thermal printer. When the Home Computer eventually fell behind schedule, the entire SR-62 team was moved over to complete the 99/4. Would the following be possible, ????????? ...in 1977 there were three ideas from different developers for the development of the later TI-99/4. Low-end video game console Personal computer (SR-62???) High-end business computer (SR-70???)

Now I've found it. The text is from "TI 99/7 Computer Hardware Theory of Operation" page 5. http://www.whtech.com/ftp/datasheets and manuals/99-7 Computer/99-7 Hardware Theory of Operation.pdf

I tried to create a TI-timeline (from 1972 to 1984). TI-Timeline72-84.pdf

Great done, I like it. ? #21: Ist TI-99/3B the "Ranger"?

Does anyone know the SR-62 project from the interview with Herman Schuurman. I only found this link to the SR-60A: http://www.datamath.org/Desktop/sr-60a.htm SR stands for slide rules and TI used this combination of letters from 1972 to 1978? for Scientific & Financial calculators (SR-10, SR-11, SR-16, SR-20, SR-22, SR-40, SR-50, SR-51,SR-52, SR-56, SR60). Later "TI-" was also used for this type of calculator. Are there any new findings about the SR-7o? ?

thanks OLD CS1 ?

I think I started this question in the wrong subforum. ?‍♂️ It actually belongs in: Tomy Tutor, CC40, 99/2, 99/8, Cortex, 990 mini How can I move this? ?

If I got it right, TI's business and home computers division were in competition. The "Cyclops" was a prototype with a TI-99/4 console, but with a different content and did not come from the home computer division (probably around 1980). The Insight 10 was actually available from 1981 and apparently mainly in France. I've never seen such a part in the original. All I noticed was that the 99/7 was mentioned over and over again, but apparently there were three different models in different years. So far, I have not found any photos of any of the three variants. There have been several versions of the Silent 700 over the years: 1970&71: 720, 721,722, 723, 730, 731 1972: 725 1973: 732, 733 1975: 742, 743, 745 1978: 763, 765 1977/78: 770, 771, 774 1980: 781, 783, 785, 787 1983: 703, 707

It is possible that only a 765 console was used for the TI-99/7. Initially, a TI-99/4 console was also used for the "intelligent terminal" and only in the 2nd version (Insight 10) in 1981 a console from the Silent series (http://shawweb.myzen.co.uk/stephen/tihistory.htm).

Hallo, in 1977 there were three ideas from different developers for the development of the later TI-99/4. Low-end video game console Personal computer High-end business computer The first two groups finally formed the developers of the Dimension & TI-99/4 and the last was connected to the division of minicomputers. The name TI-99/7 appears repeatedly in history. How many computers have there been that have this name? And do they have a connection with the three ideas above. Do we already know more? 1) SR-70 An interview by Kl99 with Herman Schuurman tells of a computer that was not ready for series production in 1978 and had a TMS9900. There were also documents from C.B.Wilson: The SR-62 merged with the TI-99/4? 2) "Ranger": Don Bynum and a team built 7 or 8 Rangers with a Z80. http://shawweb.myzen.co.uk/stephen/tihistory.htm 3) 765 terminal: June 1980 or July 1981: A computer that was supposed to be available in two versions, but was deleted for the TI-99/4A. https://99er.net/hist2.html http://www.ti99.com/ti/index.php?article6/ti-99-7 thanks