TMS9995 on RC2014
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The document discusses the TMS9995 CPU module for the RC2014 computer, including its origins, design inspirations, and comparative performance. It covers key elements such as project inspiration, architecture mapping, and firmware considerations. The talk also addresses the historical context of the TMS9995 within the evolution of computing technology.
TMS9995 on RC2014
- 1. TMS9995 ON RC2014 CHRIS SWAN @CPSWAN
- 2. RETRO ME ZX81, Dragon 32, Plus/4, C64 Amiga 500, PPC640 Amiga 1200 PC, PC, PC, PC… https://about.me/cpswan
- 3. WHAT TO EXPECT FROM THIS TALK •Project Inspiration •TMS9995 origins •A design to work from •Putting it together •Hello World •Are 16bits better? https://hackaday.io/project/166036-tms9995-cpu-module-for-rc2014
- 6. WE ALL BUILD ON THE SHOULDERS OF GIANTS http://www.searle.wales/
- 7. GRANT HAS BASIC AND CP/M FIRMWARE
- 8. WHAT DO YOU DO WITH YOUR RC2014 AFTER CP/M?
- 12. TMS9995 ORIGINS
- 13. TMS9900 (1976) https://commons.wikimedia.org/wiki/File:KL_TI_TMS9900_Black_Background.jpg CC ASA 3.0 by Konstantin Lanzet
- 14. TMS9900 PINOUT
- 15. TI-990 MINI COMPUTER (1973) https://commons.wikimedia.org/wiki/File:Ti990.jpg Public Domain by Davepitts
- 16. TI-99/4 (1979) https://commons.wikimedia.org/wiki/File:TI-99-4_homecomputer_(adjusted_version).jpg CC ASA 4.0 by Tocchet22
- 17. TI-99/4A (1981) https://commons.wikimedia.org/wiki/File:TI99-IMG_7132.jpg CC ASA 2.0 by Rama & Musée Bolo
- 18. TMS9995 (1982)
- 19. TI99/2 (1983) https://99er.net/992.html Photo by Bryan Roppolo
- 21. TOMY TUTOR (1982) https://commons.wikimedia.org/wiki/File:Tomy-Tutor-wControllers.jpg Public Domain by Evan-Amos
- 22. POWERTRAN CORTEX
- 23. A DESIGN TO WORK FROM
- 24. STUART CONNER – THE GRANT SEARLE OF TMS 99XX http://www.stuartconner.me.uk/tms9995_breadboard/tms9995_breadboard.htm
- 25. FIRMWARE
- 26. CIRCUIT DIAGRAM 1 – CPU, RAM, ROM
- 27. SOME FAMILIAR OLD FRIENDS – 62256 & 27256
- 28. AND SOME SIMILAR CHIP SELECT LOGIC
- 29. SERIAL PORT IS A BIT DIFFERENT
- 30. BUT I DON’T ACTUALLY NEED RS232 LEVELS
- 32. MAPPING ARCHITECTURES – FIRST THOUGHTS Z80 TMS9995 MREQ MEMEN RD DBIN WR WE
- 33. MAPPING ARCHITECTURES TMS9995 RC2014 A0-A15 A15-A0 Vss GND Vcc 5v NC M1 Reset Reset CLKOUT Clock NC INT MEMEN Mreq WE/CRUCLK Wr DBIN Rd NC IORQ D7-D0 D0-D7 CRUIN USR1
- 34. CLOCK CHECK
- 35. ADDRESS BUS
- 36. COMPLETED FRONT
- 37. COMPLETED BACK
- 38. HELLO WORLD
- 39. HELLO WORLD
- 40. HACKING THE RC2014 ROM MODULE
- 41. BASIC
- 42. FORTH
- 45. NO! 0 10 20 30 40 50 60 Z80 @ 14.7MHz 6502 @ 4MHz TMS9995 @ 3MHz BASIC Primes to 199 http://ancientcomputing.blogspot.com/2017/06/a-6502-cpu-for-rc2014-software.html
- 46. NOT GREAT, NOT TERRIBLE 0 10 20 30 40 50 60 Z80 @ 3.5MHz (ZX Spectrum) 6502 @ 2MHz (BBC Micro) TMS9995 @ 3MHz BASIC Primes to 199
- 47. TMS99XX (KIND OF) LIVES ON IN MSP430 MCUS
- 48. WHAT ELSE WOULD YOU LIKE TO KNOW?