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Emulating a TMS/PIC7000 (CTS256A-AL2) in a new MCU... [message #10365 is a reply to message #10344]

Sat, 20 May 2023 09:12

jayindallas
Messages: 110
Registered: June 2021

Senior Member

lynchaj wrote:
(1):"...someone could re-implement the text to speech algorithm in a new MCU and interface to a SPO256-AL2..."
(2):"...legacy text-to-speech boards are dependent on the CTS256A-AL2..."
(3):"...neat would be a modern MCU on a DIP-40 adapter that's 5V tolerant and pin compatible with CTS256A-AL2..."
(4):"...Bonus points for making it software compatible with the CTS256A-AL2 ROM image..."

That is feasible and would remove all need of old parts, other than a 40pin DIP socket. ;)

Making it TMS7000 series machine code compatible would be worthwhile; it appears that the CTS256A-AL2 code can be read directly out of an original chip. Simply load that code image into the new MCU system, and it could emulate a CTS256A-AL2 by running a TMS7000 series emulator on the original CTS256A-AL2 machine code image.

That would also allow the original CTS256A-AL2 code to be modified to better handle the Ap-Note, and both code images could be available for selection.

This retro product could also be a replacement part for any defective TMS7000/PIC7000 in restoring some vintage product.

The Raspberry Pi Pico board would be a wise choice for the new MCU.

As I'm curious about this... after I finish my study on how to program and read/verify TMS7000 series micros, I'll take a few days to analyze the instruction set of the TMS7000 to see how easy it would be to emulate on a PICO. I do that in spreadsheets so I can reorganize the instruction set data into a data structure for emulation.

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[Message index]

		General Instrument CTS256A-AL2 vs. Microchip CTS256AL2 By: lynchaj on Fri, 28 April 2023 03:28
		Re: General Instruments CTS256A-AL2 vs. Microchip CTS256AL2 By: jayindallas on Fri, 28 April 2023 13:10
		Re: General Instruments CTS256A-AL2 vs. Microchip CTS256AL2 By: scruss on Sat, 06 May 2023 16:46
		Re: General Instruments CTS256A-AL2 vs. Microchip CTS256AL2 By: lynchaj on Sat, 06 May 2023 18:13
		Re: github project may have extracted the CTS256A-AL2 code By: jayindallas on Sat, 06 May 2023 20:45
		Re: General Instruments CTS256A-AL2 vs. Microchip CTS256AL2 By: gkaufman on Sun, 07 May 2023 07:11
		Re: Programming the Naval algorithm as a CTSx for PIC/TMS7000 or otherwise By: jayindallas on Sun, 07 May 2023 16:26
		Re: General Instruments CTS256A-AL2 vs. Microchip CTS256AL2 By: lynchaj on Mon, 08 May 2023 04:04
		Re: Is the PIC/TMS7041 field programmable? By: jayindallas on Mon, 08 May 2023 08:25
		Re: Is the PIC/TMS7041 field programmable? By: lynchaj on Mon, 08 May 2023 12:50
		Re: No source of new-old CTS256A-AL2 economical micro solutions By: jayindallas on Mon, 08 May 2023 16:37
		Re: No source of new-old CTS256A-AL2 economical micro solutions By: lynchaj on Tue, 09 May 2023 04:41
		Re: No source of new-old CTS256A-AL2 economical micro solutions By: scruss on Sun, 14 May 2023 09:40
		Re: No source of new-old CTS256A-AL2 economical micro solutions By: jayindallas on Sun, 14 May 2023 22:19
		Re: No source of new-old CTS256A-AL2 economical micro solutions By: scruss on Wed, 17 May 2023 07:11
		Re: No source of new-old CTS256A-AL2 economical micro solutions By: jayindallas on Wed, 17 May 2023 11:03
		Emulating a TMS/PIC7000 (CTS256A-AL2) in a new MCU... By: jayindallas on Sat, 20 May 2023 09:12
		CHAPTER 01 :: "Introduction to Hardware Emulation of the 7000 Series" By: jayindallas on Sun, 21 May 2023 11:08
		Re: General Instruments CTS256A-AL2 vs. Microchip CTS256AL2 By: lynchaj on Mon, 25 March 2024 11:23
		Re: General Instruments CTS256A-AL2 vs. Microchip CTS256AL2 By: lynchaj on Wed, 27 March 2024 19:11
		Re: General Instruments CTS256A-AL2 vs. Microchip CTS256AL2 By: lynchaj on Sun, 31 March 2024 08:46
		7000 Series Unobtainium may be OBTAINium? By: jayindallas on Sun, 31 March 2024 11:50
		Re: General Instruments CTS256A-AL2 vs. Microchip CTS256AL2 By: lynchaj on Sun, 31 March 2024 17:38
		Tables of Various 7000 Series Device Features/Specifications By: jayindallas on Sun, 31 March 2024 19:41
		Re: TMS7000 Series Devices (Manual section 2.1) By: lynchaj on Mon, 01 April 2024 12:01
		Prototyping 7xxx Devices appear to support External Memory?! By: jayindallas on Mon, 01 April 2024 18:37
		Re: TMS7000 Series Devices (Manual section 2.1) By: lynchaj on Wed, 03 April 2024 03:57
		Re: TMS7000 Series Devices (Manual section 2.1) By: lynchaj on Thu, 04 April 2024 04:59
		CTS256 resurrection from old 70xx & SP-0256* too?! By: jayindallas on Thu, 04 April 2024 08:56
		Re: TMS7000 Series Devices (Manual section 2.1) By: lynchaj on Thu, 04 April 2024 10:00
		70x1 Memory Access Timing: Internal -versus- External Access By: jayindallas on Thu, 04 April 2024 11:03
		Re: 70x1 Memory Access Timing: Internal -versus- External Access By: lynchaj on Fri, 05 April 2024 06:07
		TMS7000 Series with Custom Micro-Coded Instructions By: jayindallas on Fri, 05 April 2024 21:14
		Re: TMS7000 Series with Custom Micro-Coded Instructions By: lynchaj on Sat, 06 April 2024 16:52
		Daisy 256 & the Speech Processor By: jayindallas on Sat, 06 April 2024 21:32
		Re: Daisy 256 & the Speech Processor By: lynchaj on Sun, 07 April 2024 07:08
		Reverse-Engineering the Speech Processor ROM By: jayindallas on Sun, 07 April 2024 11:24
		Re: Reverse-Engineering the Speech Processor ROM By: lynchaj on Sun, 07 April 2024 18:13
		Re: Reverse-Engineering the Speech Processor ROM By: lynchaj on Mon, 08 April 2024 03:46
		Re: Reverse-Engineering the Speech Processor ROM By: jayindallas on Mon, 08 April 2024 14:23
		Re: Reverse-Engineering the Speech Processor ROM By: lynchaj on Tue, 09 April 2024 04:22
		Re: Reverse-Engineering the Speech Processor ROM By: lynchaj on Tue, 09 April 2024 09:49
		Re: Reverse-Engineering the Speech Processor ROM By: lynchaj on Tue, 09 April 2024 10:50
		Re: Reverse-Engineering the Speech Processor ROM By: jayindallas on Wed, 10 April 2024 20:40
		Re: Reverse-Engineering the Speech Processor ROM By: lynchaj on Thu, 11 April 2024 09:56
		Re:TMS700x Memory Interface Mode Timing Spreadsheet UPDATE By: jayindallas on Fri, 12 April 2024 08:16
		Re: What TMS7000 Family Data Manual Version Am I Using? By: lynchaj on Fri, 12 April 2024 13:54
		Re: What TMS7000 Family Data Manual Version Am I Using? By: lynchaj on Fri, 19 April 2024 03:37
		DAISY256 works By: lynchaj on Mon, 22 April 2024 03:36
		Re: DAISY256 works By: lynchaj on Mon, 22 April 2024 12:57
		Re: DAISY256 works By: lynchaj on Mon, 22 April 2024 15:10
		Re: DAISY256 works By: lynchaj on Tue, 23 April 2024 03:54
		Re: DAISY256 works By: lynchaj on Tue, 23 April 2024 12:02
		Re: DAISY256 works By: jayindallas on Tue, 23 April 2024 12:31
		Re: DAISY256 works By: lynchaj on Sat, 27 April 2024 12:12
		Baud Rate Tables for 70x1, 70x2, 70Cx2 By: jayindallas on Sun, 28 April 2024 21:43
		Re: DAISY256 works By: lynchaj on Mon, 29 April 2024 04:16
		Re: DAISY256 works By: plasmo on Mon, 29 April 2024 05:52
		Re: DAISY256 works By: jayindallas on Mon, 29 April 2024 15:09
		Re: DAISY256 works By: plasmo on Mon, 29 April 2024 20:25
		Re: DAISY256 works By: lynchaj on Tue, 30 April 2024 04:44
		Re: DAISY256 works By: berzerkula on Mon, 06 May 2024 19:31
		Re: DAISY256 works By: lynchaj on Tue, 07 May 2024 04:50
		Re: DAISY256 works By: berzerkula on Tue, 14 May 2024 22:37
		Re: DAISY256 works By: lynchaj on Wed, 15 May 2024 03:38
		Re: DAISY256 works By: scruss on Wed, 24 July 2024 15:46
		Re: DAISY256 works By: berzerkula on Tue, 26 November 2024 17:17
		Re: DAISY256 works By: lynchaj on Sun, 16 June 2024 11:21
		Re: DAISY256 works By: berzerkula on Mon, 15 July 2024 23:57

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