acadiel

That’s all that’s in the lot about the SR-70 (99/7), I’m afraid. I saw in your interviews confirmation that the SR-70 was also called the 99/7, so now we have proof of what it was supposed to be!

Would these work? https://www.ebay.com/itm/Single-Double-Row-DuPont-2-54mm-Rainbow-Cable-Ribbon-Jumper-Wire-Female-Female/264011141771?hash=item3d784a528b:g:xrYAAOSw3BFcf3JN I'm using the 1x8's with the 74 with no issue. I haven't tried the 2x4 ones yet for the CC-40.

Any feedback on this one yet?

More progress. Need to wait for my bezel to come in and figure the transparent key caps printing thing out.

+1. For someone who has both systems, it helps. Might I also suggest that you sell the eight pin f-f cables, @brain. And maybe the 2x4 cables, as options.

Getting there. Have the headers and key caps too.... just need to solder up and wait for the 3D part to come in.

1978 - SR70 Hardware Functional Specifications. (there's a couple missing pages, yes, I know. <grin>) Never released; TMS9900 small business computer. Maybe the mythical TI-99/7? 1978-SR70-Business-Computer-Specifications.pdf

🙂 🙂 🙂

Yeah, the hooks would all have to be changed - from loading DV/80 files with data to "bank to certain bank, copy/read data from there". Different routines. Should we invent a cartridge ROM read only storage DSR ROM for the side port? LOL.

I wonder if this was intentional (copyright protection) or not. If we do correct the file EOF pointers, I wonder if it'll impact anything in the code. Suppose we can fix all of them for each file, throw the modded disk images out here in the thread, and crowdsource to see if the game still works fine.

@tanam1972 cartridge information website: https://tms9918.hatenablog.com/entry/2018/01/18/211846 Try connecting a RAM & ROM cartridge to the expansion slot of Tutor Part 6 I thought about how to connect 16KB RAM (CXK58257P-10L) and 24KB ROM (27C256) to the cartridge slot of Pyuta / Jr / mk2. The Tomy Tutor / mk2 in 16KB RAM (6000-7FFF / C000-DFFF ), the Jr 8KB RAM (6000-7FFF) was used. Please use the sample programs (16KB RAMTEST, TINY BASIC, PITFALL !, TI SCRAMBLE) here. http://www.geocities.jp/parallel_computer_inc/pyuta16kram.zip @tanam1972(the above link is dead, unfortunately.) Address A0 A1 A2 | /CE RAM /CE2 A14 A13 ROM >0000 0 0 0 | 1 1 - - >2000 0 0 1 | 1 1 - - >4000 0 1 0 | 1 0 1 0 >4000 >6000 0 1 1 | 0 >6000 1 - - >8000 1 0 0 | 1 0 0 0 >0000 >A000 1 0 1 | 1 0 0 1 >2000 >C000 1 1 0 | 0 >4000 1 - - >E000 1 1 1 | 1 1 - - Equations for the GAL: ; ; PYUTA16KRAM.EQN - PYUTA2 RAM&ROM CARTRIDGE ; TITLE PYUTA2 RAM&ROM CARTRIDGE PATTERN A REVISION 1.0 AUTHOR TANAM1972 COMPANY PARALLEL COMPUTER INC DATE 1/20/18 CHIP PYUTA2 GAL22V10 NC A2 A1 A0 NC NC NC NC NC NC NC GND NC CE_n CE2_n SELEXM A14 A13 NC NC NC NC NC VCC EQUATIONS CE_n = A0 * /A1 + A0 * A2 + /A0 * /A1 + /A0 * /A2 + /A1 + /A1 * A2 + /A1*/A2 CE2_n =/A0 * /A1 + /A0 * A2 + A1 * A0 + A1 * A2 SELEXM = /A0 * A1 + /A1 * A0 + /A2 * A0 + /A2 * A1 A14 = A1 A13 = A2 I tried to post from the circuit diagram of US TUTOR. http://www.floodgap.com/retrobits/tomy/ioport.gif It is said that the SELEX M signal (MEMORY) of the expansion slot operates in US TUTOR. For mk2, the RAM & ROM cartridge operated in the cartridge slot instead of the expansion slot. http://www43.tok2.com/home/cmpslv/Pyuuta/EnrPt.htm PYUTA(mk2) PIN 1 GND(0V) PIN 2　GND(0V) PIN 3　D7 PIN 4　/INT1 PIN 5　D6 PIN 6 /HOLD(GND) PIN 7 D5 PIN 8 A15 PIN 9 D4 PIN10 A13 PIN11 D3 PIN12 A12 PIN13 D2 PIN14 A11 PIN15 D1 PIN16 A10 PIN17　D0 PIN18　A9 PIN19　/IOPORT(/E000) PIN20　A8 PIN21 /MEMEN PIN22 A7 PIN23 A14 PIN24 A3 PIN25 A2 PIN26　A6 PIN27　/READY PIN28　A5 PIN29　/DBIN PIN30 A4 PIN31 /WE PIN32 A1 PIN33 /INT4 PIN34 A0 PIN35 SELEXM(MEMORY) PIN36 ROMCLK(/0000) PIN37 /RESET PIN38 /EXP0(GROM SEL) PIN39 /EXP1(GROM CLK) PIN40 /EXP2(VDP) PIN41　/EXP3(SOUND) PIN42　/EXM00(/0000) PIN43　/EXM40(/4000) PIN44　/EXM80(/8000) PIN45　/EXMC0(/C000) PIN46 CLKOUT PIN47 LAQ(/CRUIN) PIN48 KILLROM(-5V) PIN49 VCC(+5V) PIN50 VCC(+5V)

All cartridges at once from @tanam1972

Want to get rid of that RS232 interface card for the printer? I’ve been searching for one forever..... 🙂 thanks!

BASIC for the JP Pyuuta as well as TI Pitfall!

I had a friend who "sliced" and "split" (his words not mine) the 3D STL model - the single .stl file wasn't enough - he had to download the whole GitHub archive to get the files he needed to print. He cut the model in two for me to make it big enough to print. I'm waiting for him to mail it to me. Supposedly, I can superglue it or just some kind of other glue to get it to adhere. I have the PCB, switches on order, key extension kit, a whole set of keycaps (from my Keychron keyboard), the pin headers, right angle headers, and jumpers... so I'm about ready to go - just need to get all the parts in. Will post pics here as I make progress.

FYI, there's a Mist core now too.. https://github.com/mist-devel/mist-binaries/tree/master/cores/ti994a

We should really reimplement the Cube O Matic demo for the TI. 😂🤣

Here, we have a nice bit of history. Two memos (slightly different) from Herb Shanzer, manager of the Calculator and Portable Computer Division of TI. September 20, 1982. The formal memo is to Bill Turner, the executive President in charge of the TI Consumer Group (remember, he was fired in 1983 for the Consumer group's poor performance.) In the memo, Herb announces why the TI-88 is being discontinued. TI lost $3M ($8.2M today) by cancelling the program. They are concerned that the TI-88 would interfere with their long range strategic product, the Advanced Language Calculator. The ALC, which I have plenty of stuff to scan on (including consumer studies of three models which were under consideration) had three tiers - all of which are described in this memo. Ultimately, we wound up with an ALC known as the CC-40, which was one of the three choices. Anyway, now we're into CC-40 territory with this documentation. I do have a whole binder of something called "TI-88 ALEX" which appears to be unit test/test cases done with the TI-88 calculator. That will be one of the later things I scan since it's so large. Up next - Some TI Professional peripheral manuals and a document called "SR-70" - a TMS9900 based system - from 1978. "The SR-70 is a small business oriented machine..." Enjoy today's scans. 1982-TI88-Herb_Shanzer_TI-88_Program_Discontinuation.pdf

Again, TI-88. September 10, 1982. The crap is about to hit the fan. The TI-88 was cancelled today, and this is a copy of a TI Silent Printer (?) printout/memo about that, as well as follow up. This is from Herb Shanzer, a manager in the Calculator and Compact Computer division of TI. 1982-TI88-Herb_Shanzer_Silent_Printer_Mailing.pdf

Now, if you read anything today... read this. A perfect example of a snarky internal memo from one Tony Barlow to one Johnny Barrett "dumping" on the TI-88. Dated 1981. Note, the TI-88 was in development from around 1980 and then pulled in September 1982 (before the ALC/CC-40). 1981-TI88-Barlow_Critique_Memo.pdf

The never released TI88 calculator's Peripheral Bus Specification 1981-TI88-Calculator_Peripheral_Bus_Specification.pdf

The unreleased TI-88 calculator (which was cancelled to make room for the CC-40) - here's the block diagram for the memory and the I/O specifications for it. 1980_TI-88-MemoryBlockDiagram-IO-Specificiations.pdf

1980 - TI 85 (Product 225) schematics. This might be what that Project X binder was for? I don't even find this on on the Datamath website (except the 1992ish incarnation) Edit: Joerg @ Datamath says these are the TI-88 schematics! 1980_TI-85_product_225_schematics.pdf

I will post a little programmable calculator stuff (not much) here, and here's the first tidbit. A request for a TI-59 programmable CROM (think GROM, but "Calculator ROM") 1985_Custom_CROM_Request_TI59.pdf

Yep, his Jr. Site is here: https://www.floodgap.com/retrobits/tomy/pyuuta/pyuutajr.html A hardware question for you - instead of eight 16k x 1 bit chips, how easy is it to replace with one 16k x 8 chip? What would the wiring look like? Or something like this - but can it be made simpler? https://www.yumpu.com/en/document/read/46927596/sram-replacement-for-tms99x8-vram