RetroBrew Computers Forum: General Discussion » Has anyone reverse engineered SP0256A external serial speech ROM

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Re: Arduino lab tool wrapped-around a SP0256 to reverse engineer an unobtainium SPR000 [message #10748 is a reply to message #10746]

Thu, 02 May 2024 20:45

plasmo
Messages: 916
Registered: March 2017
Location: New Mexico, USA

Senior Member

Today I received the 2 SP0256AL2 I ordered from 351_windsor. I also have the CPLD protoboard checked out. It is ready to wire in the circuits for SP0256-AL2. I don't have 3.12MHz crystal, so I plan to either divide the 22Mhz Z80 clock by 7 to 3.14MHz or divide the 25MHz oscillator on the protoboard by 8 to get 3.125MHz. The audio amplifier is LM386 which I have many on hand. The immediate goal is have Z80 drive it to make some sound. I should be able to spend an hour or two a day working on this.
Bill

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Attachment: two SP0256_AL2_from351_windsor.jpg
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[Message index]

		Has anyone reverse engineered SP0256A external serial speech ROM By: lynchaj on Wed, 03 April 2024 08:38
		Can the SP-0256A Speech Processor be Reverse Engineered? By: jayindallas on Sat, 06 April 2024 09:26
		Reading G.I. SPRnnn External Serial ROM Content By: jayindallas on Mon, 08 April 2024 10:01
		Re: Method to read a SPR-xxx External Rom \| 2007 Internal Rom Dump \| 2017 SPPR256 by FPGA By: lynchaj on Mon, 08 April 2024 10:34
		Method to read a SPRnnn External Rom with an Arduino By: jayindallas on Mon, 08 April 2024 11:03
		Re: Theoretical Method to read a SPR-xxx External Rom with an Arduino By: lynchaj on Tue, 16 April 2024 11:23
		RPi Pico W wrapped around a SP0250 or SP0256 *Updated 20250202 By: jayindallas on Tue, 16 April 2024 18:27
		Re: RPi Pico W wrapped around a SP0250 or SP0256 By: lynchaj on Wed, 17 April 2024 04:10
		Arduino lab tool wrapped-around a SP0256 to reverse engineer an unobtainium SPR000 By: jayindallas on Wed, 01 May 2024 08:21
		Re: Arduino lab tool wrapped-around a SP0256 to reverse engineer an unobtainium SPR000 By: lynchaj on Wed, 01 May 2024 17:09
		Re: Arduino lab tool wrapped-around a SP0256 to reverse engineer an unobtainium SPR000 By: plasmo on Thu, 02 May 2024 20:45
		Re: Arduino lab tool wrapped-around a SP0256 to reverse engineer an unobtainium SPR000 By: lynchaj on Fri, 03 May 2024 04:17
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: plasmo on Sun, 12 May 2024 20:46
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: plasmo on Sun, 12 May 2024 20:51
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: lynchaj on Mon, 13 May 2024 03:12
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: plasmo on Mon, 13 May 2024 06:08
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: lynchaj on Mon, 13 May 2024 09:56
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: plasmo on Mon, 13 May 2024 20:10
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: lynchaj on Tue, 14 May 2024 03:17
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: plasmo on Tue, 14 May 2024 20:07
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: lynchaj on Wed, 15 May 2024 03:43
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: plasmo on Thu, 16 May 2024 07:57
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: lynchaj on Fri, 17 May 2024 04:14
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: lynchaj on Fri, 17 May 2024 05:29
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: plasmo on Fri, 17 May 2024 12:06
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: lynchaj on Fri, 17 May 2024 18:49
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: plasmo on Fri, 17 May 2024 21:31
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: lynchaj on Sat, 18 May 2024 03:27
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: lynchaj on Sat, 18 May 2024 04:29
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: lynchaj on Sat, 18 May 2024 05:55
		Re: Has anyone reverse engineered SP0256A external serial speech ROM By: berzerkula on Tue, 16 July 2024 00:01

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