[FRAM71] Pre-Production Batch
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03-15-2015, 04:56 PM
(This post was last modified: 03-15-2015 05:01 PM by Hans Brueggemann.)
Post: #63
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RE: [FRAM71] Pre-Production Batch
(03-15-2015 02:55 PM)Dave Frederickson Wrote: some comments on V500: 1) on-the-fly alterations are possible for F-Block addresses only, which are then directly written into FRAM71's MMU. so, you essentially keep the configuration unaltered, but let the modules point to different F-Blocks. that's why a configuration cycle is not required (which is of course only true if there is nothing in the F-Blocks that gets referenced by the file-chain! Version 4.xx prohibits this and requires the MMU-data to be updated via a power-cycle to minimize the chance of file-chain corruption). step 4 in my previous post suggests that you then may further change the configuration to your likings. 2) memory-sizes and -types can't be altered in this manner and still require a power-cycle in order to announce the config change to the HP-71B. Restoring of memory contents can be tedious if you have to restore a lot of ROM images in your HP-71B. with V500, you can do a backup/restore of all FRAM contents under program control. production batch: folks that have pre-ordered the FRAM71 get informed separately via e-mail about the manufacturing status. as of today, material purchase is complete (so, currently not taking any orders) and i'm waiting for the manufacturer to assign a timeslot. as suggested, all production batch units will have a programming header installed. as for the 1 MByte version, i haven't decided on this yet. hans |
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