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Hoppi 1.3.2 Release
01-12-2017, 04:10 AM (This post was last modified: 01-12-2017 06:07 AM by JDW.)
Post: #39
RE: Hoppi 1.3.2 Release
Bob,

Per your advice, I unmarked my 128k FRAM Card, turned off the calc, then removed it.

[Image: HP48_UnmergeMemory.png]

I then loaded Hoppi and started the transfer again. I downloaded all 10 packets of RECV.KER and then I downloaded 123904 bytes of MKRAM.KER before I got the following error:

Received ERROR message: Insufficient Memory MKRAM.KER ABORTED

I then wiped RAM and tried it again, this time only transferring MKRAM.KER. It got to 124928 before giving me the Insufficient Memory error.

Since I never got that far with the 128k FRAM card inserted and merged, such would indicate the FRAM card is at fault. (The seller said he tested the card extensively using his own Port Memory Stress Test prior to selling it to me.)


Here is a front & back scan of my FRAM card:

https://cl.ly/2q0E3P1j1M2S/FRAM_Card_128k_forHP48GX.jpg

The chip shown just to the right of the Write Protect Switch is marked as a "74HC00D". The chip directly below than is marked RAMTRON FM28V100-TG. Chips U21 & U26 are TI chips marked "NJ245" which seems to correspond to this "SN74LVCH8T245 8-BIT Dual-Supply Bus Transceiver". The last chip, U20, is an NXP chip marked "LVC16244A".

I know you can't always get accurate capacitance measurements in-circuit, but I used my Fluke meter to test the capacitance of the three brown caps (C1, C3, C4). They all tested to be roughly 10uF each.

Prior to purchase, I was informed that the 128k FRAM cards were relisted only after capacitance had been increased to enhance stability of the card. Any thoughts on the card design?
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Messages In This Thread
Hoppi 1.3.2 Release - pdo - 07-16-2016, 06:37 PM
RE: Hoppi 1.3.2 Release - JDW - 07-16-2016, 09:43 PM
RE: Hoppi 1.3.2 Release - pdo - 07-17-2016, 09:44 AM
RE: Hoppi 1.3.2 Release - JDW - 07-17-2016, 01:52 PM
RE: Hoppi 1.3.2 Release - JDW - 08-15-2016, 06:25 AM
RE: Hoppi 1.3.2 Release - pdo - 08-15-2016, 12:59 PM
RE: Hoppi 1.3.2 Release - JDW - 08-15-2016, 01:21 PM
RE: Hoppi 1.3.2 Release - pdo - 08-15-2016, 06:58 PM
Hoppi 1.3.3 Release - pdo - 08-16-2016, 08:09 PM
RE: Hoppi 1.3.2 Release - JDW - 08-17-2016, 02:49 AM
RE: Hoppi 1.3.2 Release - rprosperi - 08-17-2016, 02:06 PM
RE: Hoppi 1.3.2 Release - pdo - 08-17-2016, 06:02 PM
RE: Hoppi 1.3.2 Release - pdo - 08-17-2016, 06:11 PM
RE: Hoppi 1.3.2 Release - JDW - 08-17-2016, 08:14 PM
RE: Hoppi 1.3.2 Release - JDW - 12-07-2016, 12:35 AM
RE: Hoppi 1.3.2 Release - pdo - 12-07-2016, 02:08 PM
RE: Hoppi 1.3.2 Release - JDW - 12-08-2016, 12:27 AM
RE: Hoppi 1.3.2 Release - pdo - 12-11-2016, 10:27 PM
RE: Hoppi 1.3.2 Release - JDW - 12-12-2016, 12:05 AM
RE: Hoppi 1.3.2 Release - pdo - 12-12-2016, 01:23 PM
RE: Hoppi 1.3.2 Release - JDW - 12-13-2016, 02:52 AM
RE: Hoppi 1.3.2 Release - pdo - 12-13-2016, 02:16 PM
RE: Hoppi 1.3.2 Release - JDW - 12-14-2016, 12:07 AM
RE: Hoppi 1.3.2 Release - Han - 12-14-2016, 09:23 AM
RE: Hoppi 1.3.2 Release - JDW - 12-15-2016, 12:29 AM
RE: Hoppi 1.3.2 Release - rprosperi - 12-15-2016, 12:58 AM
RE: Hoppi 1.3.2 Release - JDW - 12-20-2016, 05:15 AM
RE: Hoppi 1.3.2 Release - rprosperi - 12-20-2016, 02:02 PM
RE: Hoppi 1.3.2 Release - JDW - 12-21-2016, 12:13 AM
RE: Hoppi 1.3.2 Release - rprosperi - 12-21-2016, 03:41 AM
RE: Hoppi 1.3.2 Release - Han - 12-21-2016, 06:01 AM
RE: Hoppi 1.3.2 Release - JDW - 01-07-2017, 04:17 AM
RE: Hoppi 1.3.2 Release - JDW - 01-11-2017, 07:55 AM
RE: Hoppi 1.3.2 Release - pdo - 01-11-2017, 09:00 PM
RE: Hoppi 1.3.2 Release - JDW - 01-12-2017, 12:32 AM
RE: Hoppi 1.3.2 Release - Han - 01-12-2017, 01:21 AM
RE: Hoppi 1.3.2 Release - JDW - 01-12-2017, 01:30 AM
RE: Hoppi 1.3.2 Release - rprosperi - 01-12-2017, 03:06 AM
RE: Hoppi 1.3.2 Release - Han - 01-12-2017, 01:38 PM
RE: Hoppi 1.3.2 Release - JDW - 01-12-2017 04:10 AM
RE: Hoppi 1.3.2 Release - JDW - 01-13-2017, 04:47 AM
RE: Hoppi 1.3.2 Release - pdo - 01-13-2017, 01:29 PM
RE: Hoppi 1.3.2 Release - JDW - 01-14-2017, 03:09 AM
RE: Hoppi 1.3.2 Release - JDW - 11-13-2020, 01:48 AM
RE: Hoppi 1.3.2 Release - pdo - 11-13-2020, 02:22 PM
RE: Hoppi 1.3.2 Release - JDW - 11-15-2020, 01:33 AM
RE: Hoppi 1.3.2 Release - pdo - 11-16-2020, 04:17 PM
RE: Hoppi 1.3.2 Release - cdmackay - 11-16-2020, 07:00 PM
RE: Hoppi 1.3.2 Release - pdo - 11-16-2020, 09:28 PM
RE: Hoppi 1.3.2 Release - cdmackay - 11-17-2020, 09:58 PM



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