1LG9 ROM chip tech info?
#1

I could have sworn that at one time PPC or CHHU published a spec or at least a technical description of the 1LG9 ROM, but I can't seem to find it now. Does anyone else know where it was found? Or am I just hallucinating?

The 1LG9 120Kbit ROM (3 pages of 4Kx10) was used for the 41CX mainframe ROMs, the 41C and 41CV halfnut mainframe ROM, the 82242A "Blinky" IR printer module, the Advantage ROM, and any other 12K application ROM modules. It was HP's first (and probably only) chip to support ROM bank-switching on the 41.

The 1LG9 could be configured to be hard-addressed or port-addressed, with selectable bank switching (not used for the base mainframe ROM).

#2

Details on the 1LG9 configurations can be found in the SDSII documentation. The document is on the MoHPC DVD.

I don't remember any other document on it.

J-F

#3

Thanks! That's not the document I remembered, and didn't have the level of detail I was looking for, but it was interesting nonetheless.



Possibly Related Threads…
Thread Author Replies Views Last Post
  HP 50g info Jan 7 2,720 10-21-2013, 09:09 PM
Last Post: Mike Morrow
  Prime 'CONTENT' section not retaining info text Geoff Quickfall 2 1,398 10-17-2013, 05:24 PM
Last Post: Geoff Quickfall
  Prime Info DavidShenk 0 955 06-14-2013, 11:39 AM
Last Post: davidshenk
  HP85 Programmable ROM cardtridge 82929A-service ROM not working- inaki 2 1,923 04-25-2013, 08:08 AM
Last Post: inaki
  ACT CHIP aj04062 5 1,891 01-27-2013, 02:11 PM
Last Post: Eric Smith
  Classic calculator display chip type number? Juergen Hofstaedter 3 1,627 01-22-2013, 12:47 PM
Last Post: Eric Smith
  shelf life time of a ROM, EEPROM, EPROM vs Mask Rom Guido (Canada) 6 3,068 01-11-2013, 04:09 PM
Last Post: Thomas Falk
  Big ROM - 41 System DEMO ROM Ángel Martin 5 2,624 10-16-2012, 05:28 AM
Last Post: Ángel Martin
  OT--Palm & Sharp Wizard need tech care Matt Agajanian 9 3,119 08-28-2012, 11:54 PM
Last Post: Matt Agajanian
  NoV-64: Can't Access RAM Chip 3 Les Wright 4 2,027 05-28-2012, 11:06 PM
Last Post: Les Wright

Forum Jump: