RamBOX



#13

Is it possible for anybody to rebuilt a RamBOX, so that this powerfull instrument would become a Xmas present for some of us? What would be the problem for this?
I know that there are some hardware designers like Christoph Klug that could perhaps built this...
I would buy it...


#14

dear matthias,
First you have to find plans.
They are certainly not available as public domain.
May someone be able to understand a 4K RAM MLDL plans?!
Yours.

#15

Hi,

maybe in some PPC Technical notes are some hints.
AFAIR the ERAMCO compatible design is or was available somewhere.

PPC Journal CD's ?

Or perhaps Meindert has an idea ? ;-)

Raymond

#16

Is a opened RamBox not enough? You only need the plan of the print, do you? Second you need a system software... W&W is ok...


#17

I have a W&W 32K RSU too.
But only 28K are available (4K RAM out of order).
I opened it, there's a lot of CMS and connexion are really
thin between components and some hidden behind them.
May be Jean-François would be better than me.
Please contact him: jfgarnier@wanadoo.fr
#18

Do you mean to rebuilt an original old design? I am working on a completely new design that is a RAMBox! See the specifications at www.kuipers.to/hp41.

Meindert


#19

Dear Meindert,

It makes much sense, that you complete your actual design (working with modern technologie and parts).

Rebuilding existing Eramco or W&W Ram-Box solutions is too much work and some storage IC parts not available today or exotic and hard to find.

The "traditional" Eramco and W&W Ram-Box solutions are absolutely nice parts for active HP41 user and for any collector. Unfortunately Ram-Box systems hard to find.

Up to now (and for future times) Zeproms are the leading solution for concentrating maximally power in only one HP41 plug in port...


Best wishes from Germany -Christoph


#20

Christoph,

Can you actually make the ZEPROMS or just program them?

Meindert


#21

Yeah, my question exactly. I have a dual-Zeprom
programmer, but no Zeproms, and haven't been able
to find any. The guy I bought the programmer from
had a stock of unmounted Zeprom EPROMs, but threw
them out! If anyone (Christoph?) has Zeprom that
they'd be willing to sell me (don't need the voltage
convertor, and can be totally blank, which would
normally make it pretty useless to people), I'd
be willing to pay well for it.

grant..


#22

Cool, and I'm looking for a ZEPROM burner and do not get on.. ZEPROMs I have some....


#23

Hi Matthias,

too late. I used to have a very huge Zengrange ZEPROM programmer with 8 (EIGHT) ZEPROM module slots.
I traded it away a while ago ...

Raymond


#24

Grrrrrrrrrrrrrrr........


#25

Don't say so, Matthias,
it's a nice piece...

-peter

#26

I am currently building the old version of the MLDL posted in the PPC Journal some years ago. The only IC's that I cannot find are the 4k x 1 Static Ram, TC5504AP-2. Does anyone know where these can be found?


#27

Quote:
I am currently building the old version of the MLDL posted in the PPC Journal some years ago. The only IC's that I cannot find are the 4k x 1 Static
Ram, TC5504AP-2. Does anyone know where these can be found?

I suggest you use an 8 bit SRAM chip in place of two 1 bit chips, and waste 6 bits (tie them to ground, perhaps through a resistor).

HTH,

James


Possibly Related Threads...
Thread Author Replies Views Last Post
  W&W RAMBOX 64K with DIP-Switches Christoph Giesselink 2 415 10-20-2009, 02:14 AM
Last Post: Meindert Kuipers
  INIT-Module for ERAMCO RSU-2 Rambox PeterP 3 498 02-19-2009, 03:09 AM
Last Post: christoph klug
  ERAMCO RSU RAMBox - Battery Replacement Dan Grelinger 9 960 03-27-2008, 11:09 PM
Last Post: PeterP
  Adv+CCD+Games in 41CY or Rambox PeterP 6 720 12-03-2007, 10:32 AM
Last Post: PeterP
  Rambox battery replacement Prabhu Bhooplapur 3 469 10-20-2007, 05:55 AM
Last Post: Antoine M. Couëtte
  W&W Rambox battery change? Dave Colver 2 374 08-01-2007, 06:46 AM
Last Post: Dave Colver
  HP-41CY Turbo: How can the RAMBOX be reactivated ? Marco 5 487 05-13-2006, 05:20 AM
Last Post: marco
  CY / Rambox 64 rom image PeterP 1 275 12-09-2005, 03:39 AM
Last Post: Christoph Klug
  Anyone want a rambox (made) for the hp 41? don wallace 8 762 10-05-2005, 06:08 AM
Last Post: Meindert Kuipers
  W&W Rambox functional test Juergen (CH) 6 644 04-16-2005, 02:36 PM
Last Post: Juergen (CH)

Forum Jump: