--NextPart_Webmail_9m3u9jl4l_24106_1155583003_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit If I remember right, the 4044 static RAM used only +5V. (I could be wrong -- I'm ten miles from the schematic at the moment.) But I thought it was only the DRAM parts that used -5V. -------------- Original message -------------- From: "bill malcolm" Hi : my guess is the 64k chips could be made to work or even 256k ones --- is could be an issue of supply voltages on the 16k sockets ( -5 volt) that is not needed and must be changes. I converted my tandy model 1 back in the mid 1980's to use these chips. bill ----- Original Message ----- From: WVerish@aol.com To: sebhc@sebhc.org Sent: Sunday, August 13, 2006 7:11 PM Subject: Re: [sebhc] memory for the h-8 Dear Carroll: I have a 16 k static RAM memory board that came with my H-8, but it is un-populated. The chips required for it are TMS4044 chipsThey are 4096 by 1 bit. The computer currently has only 8K of static RAM installed. This makes it very hard to write any real BASIC programs due to the lack of string handling capability with only B.H. BASIC instead of extended B.H. BASIC. I know that my 16K board could probably work with other chips, but due to their cost I really can't afford to make a mistake. Any ideas? Thanks, Wayne --NextPart_Webmail_9m3u9jl4l_24106_1155583003_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

If I remember right, the 4044 static RAM used only +5V. (I could be wrong -- I'm ten miles from the schematic at the moment.) But I thought it was only the DRAM parts that used -5V.

-------------- Original message --------------
From: "bill malcolm" <wm65805@hotmail.com>

Hi : my guess is the 64k chips could be made to work or even 256k ones --- is could be an issue of supply voltages on the 16k sockets ( -5 volt) that is not needed and must be changes. I converted my tandy model 1 back in the mid 1980's to use these chips.

bill

----- Original Message -----

From: WVerish@aol.com

To: sebhc@sebhc.org

Sent: Sunday, August 13, 2006 7:11 PM

Subject: Re: [sebhc] memory for the h-8

Dear Carroll:

I have a 16 k static RAM memory board that came with my H-8, but it is un-populated. The chips required for it are TMS4044 chipsThey are 4096 by 1 bit. The computer currently has only 8K of static RAM installed. This makes it very hard to write any real BASIC programs due to the lack of string handling capability with only B.H. BASIC instead of extended B.H. BASIC. I know that my 16K board could probably work with other chips, but due to their cost I really can't afford to make a mistake. Any ideas?

Thanks,

Wayne

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