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[FRAM71] Pre-Production Batch
12-20-2014, 07:15 PM (This post was last modified: 12-21-2014 08:47 AM by J-F Garnier.)
Post: #8
RE: [FRAM71] Pre-Production Batch
Although I missed the first batch of FRAM71, Sylvain Côté was so kind to lend me his module for some time, so since today I have a new toy to play with!

My first comments and observations:

(12-14-2014 12:40 AM)rprosperi Wrote:  Reconfiguring the IRAMs to ROM will protect the port contents from errant code romping thru memory.
Changing the module type from IRAM to ROM without precautions can produce several side effects and strange errors, especially if there are Basic programs inside. The right, secure way to create a ROM module is to use ROMCOPY.
It is also possible to manually compile each Basic program by hand by running each.

(12-14-2014 12:30 PM)Hans Brueggemann Wrote:  ... using FRAM71s configuration area to re-define portions of RAM to soft configured ROM sets FRAM71s internal read-only flag on that area which gives a better protection against overwrites
Is really this internal read-only flag implemented? I tried to POKE (with the special, unrestricted POKE function from JPC ROM) into a ROM-declared area, and the memory was actually changed.

J-F
(Edited: changed 'unprotected' to 'unrestricted' for clarification)
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Messages In This Thread
ROM Images - Dave Frederickson - 12-10-2014, 03:51 AM
IRAM vs ROM - Dave Frederickson - 12-13-2014, 06:36 PM
RE: [FRAM71] Pre-Production Batch - J-F Garnier - 12-20-2014 07:15 PM
ROMCOPY - Dave Frederickson - 12-20-2014, 08:59 PM
[FRAM71] Bankswitching? - Hans Brueggemann - 02-07-2015, 06:55 PM
v430 beta - Dave Frederickson - 02-16-2015, 06:09 AM
RE: [FRAM71] Pre-Production Batch - cruff - 02-11-2015, 11:45 PM
v430 beta - Dave Frederickson - 02-17-2015, 05:14 AM
v430 beta - Dave Frederickson - 02-27-2015, 05:20 AM
1MByte FRAM71 - Dave Frederickson - 03-14-2015, 09:18 PM
RE: [FRAM71] Pre-Production Batch - Gene - 03-15-2015, 02:04 AM
V501 Firmware woes - Hans Brueggemann - 04-23-2015, 07:12 PM
Eagerly awaiting mine - cruff - 04-24-2015, 12:40 AM
RE: [FRAM71] Pre-Production Batch - cruff - 04-24-2015, 12:53 PM
Received my FRAM71 today! - cruff - 04-25-2015, 07:03 PM
RE: [FRAM71] Pre-Production Batch - cruff - 04-26-2015, 12:27 PM
RE: [FRAM71] Pre-Production Batch - Erwin - 10-04-2016, 08:28 PM
MEMBUF - Dave Frederickson - 05-13-2015, 02:50 AM
FRAM71 V502 - Hans Brueggemann - 05-16-2015, 04:02 PM
RE: [FRAM71] Pre-Production Batch - Erwin - 01-02-2016, 08:13 AM
RE: [FRAM71] Pre-Production Batch - Oulan - 06-03-2015, 02:10 PM
RE: [FRAM71] Pre-Production Batch - Oulan - 06-03-2015, 03:47 PM
RE: [FRAM71] Pre-Production Batch - Oulan - 06-05-2015, 09:44 AM
RE: [FRAM71] Pre-Production Batch - Oulan - 06-08-2015, 07:13 AM
FlashPRO - Dave Frederickson - 06-11-2015, 03:42 PM
RE: [FRAM71] Pre-Production Batch - cruff - 06-13-2015, 12:04 PM
RE: [FRAM71] Pre-Production Batch - cruff - 06-15-2015, 11:22 PM
Blinkin' Lights - Dave Frederickson - 07-15-2015, 03:07 AM
FRAM71 LED - Hans Brueggemann - 07-16-2015, 11:47 AM
RE: [FRAM71] Pre-Production Batch - Andres - 01-25-2016, 10:40 PM
RE: [FRAM71] Pre-Production Batch - Erwin - 10-04-2016, 08:46 PM
RE: [FRAM71] Pre-Production Batch - Erwin - 10-04-2016, 09:04 PM



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