The Tomy Tutor and the state of 1983 home computers

The Tomy Tutor was my first computer, in late 1983. I was seven and we got it at Federated. I've acquired several more since then, but this is the actual one I used and it still works perfectly.

Using a design modeled on the doomed Texas Instruments 99/8, one of several unreleased successors to the TI 99/4A, the Tomy Tutor and its overseas siblings, the Japanese Pyuuta (ぴゅう太) series, promised an easy kid-friendly introduction to computers with a durable case, nice graphics and sound, games on cartridge, and two, count 'em, two internal dialects of BASIC (one on early systems). It had 16K of RAM, though this was entirely tied up in the 9918A video display processor with only 256 bytes of RAM directly addressible by its 2.7MHz TMS 9995 CPU, and of Tomy's promised peripherals only game controllers and a tape deck were ever offered. Still, despite the bowdlerized operating system and bupkis contemporary expansion options, the Tutor was nevertheless one of the first true 16-bit home computers, and as part of the 1983 low-end home system cavalcade, an inexpensive choice as well.

Another thing the Tomy doesn't have much of is history: the story of its development is rather murky, and modern-day Takara Tomy all but disowns it. I don't compulsively collect for many systems, but I do for this one, because it was the first computer we actually had at home. So when a folder with handwritten Tomy marketing notes turned up on eBay, I jumped on it. It turned out to contain proposed names for what would become the Tutor, various test marketing slogans, and even an internal pitch discussing the competition, which I'll reproduce in its entirety as an interesting insider snapshot of the early 1980s U.S. home computer landscape — after we make a quick trip to that scene in its native Japan.

A few retrobits updates on Floodgap

Just a brief programming note. Before this blog there was Floodgap Retrobits, and I still maintain those pages. One of the earliest was my Tomy Tutor-specific page devoted to my very first computer which we got in 1983. Relatives of the Texas Instruments home computers and closely patterned after the unreleased TI 99/8, the history of the Japanese models is relatively well-known and there are a number of Japanese enthusiasts that specialize in the Pyuuta, the Tutor's ancestor system. On the other hand, hardly anybody knows anything about the British version. That system is the Grandstand Tutor:

The only good photographs of this machine, which may never actually have been released to the public, and the only known information on its history appear in Your Computer October 1983, at that time one of the major home computer magazines in the UK. The original form of this machine was very similar to the Pyuuta, which emphasized its TMS9918A-based built-in paint program and due to its specialization on graphics only implements a very simplified animation-oriented dialect of BASIC called GBASIC. Adam Imports rebadged many Asian and some American toys and games for the UK (and, for some period of time, New Zealand) and had a particularly close relationship with Tomy. In fact, the relationship was close enough that Adam in fact rejected this initial version as uncompetitive with other home computers and sent it back to Tomy for a more upgraded BASIC. Tomy provided this by modifying TI Extended BASIC, calling it Tomy BASIC and implementing it as a second mode accessible from the system's menu-based interface. The absence of Tomy BASIC places the earliest Grandstand Tutor prior to the American Tomy Tutor, which also has the upgraded Tomy BASIC. Tomy subsequently sold this upgrade in at least two forms as an option for the Japanese machines as well.

The interesting part is that while PAL Tutors have been documented to exist (the American Tutor is obviously NTSC), no one yet has reported finding a Grandstand. It wouldn't be hard to distinguish one — the photograph has obvious Grandstand branding on its silver badge. It's possible they were never released at all because even accounting for publishing delays, the second Grandstand would have emerged late in 1983, hitting in the wake of the video game crash and against heavier hitters like the Commodore VIC-20 and Commodore 64 as well as (in the UK) the ZX Spectrum. Adam may have simply concluded it wasn't a strong enough competitor even with the upgraded BASIC to sell.

I also finally got off my pasty white tuckus and scanned and OCRed the rest of the Tomy Tutor User Group newsletters in my possession (I also redid #2 and #9 with OCR). The TTUG is a great example, in my humble opinion, of the variety and importance of computer user groups in the early home computer years. Our family got one of these flyers as a registered user; Gene Dinovo, the president of the club, sent out over two thousand of them to everyone on Tomy's mailing list. Just like any user group would have done in those days, the newsletter collected type-in programs, news, tutorials, high score tables, and software and peripherals for sale, including original software written by the user group's own members. Especially for orphaned systems, and there were a lot back then besides the Tutor, the reassurance that "you are not alone" went a long way to helping people still make the most out of an expensive purchase that would otherwise have become a gilded doorstop.

Finally, and almost anticlimatically, I've added updates to the Solbourne Solace with various details and corrections submitted by former Solbourne engineer Dworkin Müller. Solbourne Computer was a relatively early SPARC licensee and one of Sun's most important competitors in the first few years of the 1990s, possessing an initially formidable lead in the performance sector due to their special multiprocessing sauce. OS/MP, Solbourne's bug-compatible licensed version of SunOS 4, let Solbourne buyers run their SunOS-compatible software out of the box with little or no compromises, including SunView. Later their IDT workstations, though uniprocessor, competed directly with and even could squeak by contemporary SPARCstations, at least in the beginning. Solbourne eventually ran out of money when they hit engineering limits with their own CPU and could never reclaim the throughput crown, abandoning the computer hardware market in 1994. We might be adding more remembrances as other Solbourne engineers are contacted.

You can see these updates at The Little Orphan Tomy Tutor as well as past Old VCR Tomy articles, and The Solbourne Solace as well as past Old VCR Solbourne-specific articles. Naturally, if you have anything to add, feel free to post in the comments or drop me E-mail at ckaiser at floodgap dawt com.

After 41 years, my first assembly program on my first computer, the Tomy Tutor

We got it in 1983, I think, so it only took me about 41 years to get around to it. This Tomy Tutor isn't a replacement system I secondarily acquired, nor is it a Ship of Theseus Frankenstein rebuild. This is my actual first computer, in its original case, on its original components, with the Federated Group sticker still on the original box. And it still works.

Now, why so long? Well, for one thing, it was only supposed to be a training wheels computer because a full Commodore 64 system would have cost too much, but my folks wanted to see whether we'd take to a home computer and His High Holy Munificence Fred R. Rated was blowing these babies out for a song by then. The receipt has long since disappeared, though $99 sounds about right plus maybe around $40 or so for a joystick, cassette deck and some cartridges, compared to somewhere between $200 and $300 for the recently discounted 64 — which didn't include anything else. (It tells you something about our family finances at the time when a C64 was too expensive.) I immediately started writing my own BASIC programs on it in its perverse little BASIC dialect and when my folks indeed saved up and bought us a C64 system the next year (complete with 1702 monitor and 1541 disk drive), I refused to use it. In retaliation my best interests, my parents forcibly relocated the Tomy to storage and I went on to do even bigger things on the Commodore, making it, not the Tutor, the defining computer of my childhood. That's why there's still a Commodore 128DCR on my desk.

The other reason is that there was never really a simple way to do it. Even when I found out what CPU was actually inside (incredibly a 16-bit TMS 9995, an evolved version of the TMS 9900 in the Texas Instruments 99/4 and 99/4A), there was never a Tomy assembler, and other than its small amount of scratchpad RAM (256 bytes) the entirety of the Tutor's 16K of memory is tied up in the 9918ANL VDP video chip. That sort of architecture was typical for the family, but that also means that almost everything is stored in non-executable VDP RAM, so short of burning your own cartridge EPROMs there's no way to actually create and run a machine language program on the Tutor. The first flashcart for the Tutor didn't exist until around 2016 and it was still all ROM; furthermore, while the 99/4A could have its CPU-addressable RAM expanded (as well as the 99/8, its unreleased successor to which the Tomy Tutor is closely related), there wasn't ever a Tutor RAM expansion cartridge either until very recently. But now there are multiple homebrew options even for obscure home computers like this one, and at last I've got my own assembly language program finally running on it.

And it's all done with its own, better I/O routines (if I do say my own better self) as a basis for bigger projects. But first, a little tour of the Tutor itself, and then we'll dig in.