apersson850 Posted July 14, 2022 Share Posted July 14, 2022 If you have nothing better to do, you can read this page and see how many errors there are, describing the TMS 9900. ChibiAkumas 1 Quote Link to comment Share on other sites More sharing options...
digdugnate Posted July 14, 2022 Share Posted July 14, 2022 erm... wow. I'm not sure where to begin with this. Quote Link to comment Share on other sites More sharing options...
+TheBF Posted July 14, 2022 Share Posted July 14, 2022 Despite it's failure in the market the TMS9900 is a fascinating chip, it has virtually no registers, instead using 'Workspaces'... banks of 32 bytes that make the 16 regsiters (like a zeropage)... it also has no stack! It never occurred to him to use one of the registers as a stack pointer... Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted July 14, 2022 Share Posted July 14, 2022 1 minute ago, TheBF said: It never occurred to him to use one of the registers as a stack pointer... While I will give him severe criticism for the GeoCities website design, I will give him the benefit of the doubt that he meant a dedicated stack pointer and stack like found on, say, the 6502, which operates without consuming another CPU register. Along with the regular push/pop operations for the accumulator and CPU status register, you can also set the stack pointer with the X register value, and vice versa. I think he sees this difference as a deficit on the 9900, which is a poor conclusion. 4 Quote Link to comment Share on other sites More sharing options...
+InsaneMultitasker Posted July 14, 2022 Share Posted July 14, 2022 Yes, definitely some errors (or misconceptions) but it is a decent amount of good information. I would have loved this sort of "overview" page when I was trying to learn 9900 assembler. 4 Quote Link to comment Share on other sites More sharing options...
+jedimatt42 Posted July 16, 2022 Share Posted July 16, 2022 On 7/14/2022 at 2:15 AM, apersson850 said: If you have nothing better to do, you can read this page and see how many errors there are, describing the TMS 9900. ChibiAkumas A constructive thing to do would be to send him a note informing him of the corrections. 1 Quote Link to comment Share on other sites More sharing options...
apersson850 Posted July 16, 2022 Author Share Posted July 16, 2022 Yes, I considered that. I spent some time trying to locate some contact information on the web site, but failed. Either it's not there, or the color scheme of the site puts such a strain om my eyes that I just failed to locate it. So I gave up that thought. 2 Quote Link to comment Share on other sites More sharing options...
+jedimatt42 Posted July 16, 2022 Share Posted July 16, 2022 8 hours ago, apersson850 said: Yes, I considered that. I spent some time trying to locate some contact information on the web site, but failed. Either it's not there, or the color scheme of the site puts such a strain om my eyes that I just failed to locate it. So I gave up that thought. Yep, looks like you'd have to register to his forum or discord, or comment on his youtube videos to contact him... 1 Quote Link to comment Share on other sites More sharing options...
Willsy Posted July 18, 2022 Share Posted July 18, 2022 I tried, but I couldn't get past the colours and the the 1997 design! But hey, it's good that someone is writing about the 9900. It's a very esoteric design, so I think we can forgive some factual errors. Quote Link to comment Share on other sites More sharing options...
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