Hi All, Well I've finally burnt a reliable kernal to allow a C64 to run standalone using a 40char x 4line LCD. (see webpage for pictures, new stufd to be uploaded next week, www.64hdd.com) The next step is to introduce the standalone powerpack. I'm intending to use some decent sized NiCads to provide the 5volt supply. From what I've read on the net, 5V should run most of the chips, and in the short-boards (eg C64e and C64b3) the VIC apprantly doesn't need the higher voltage. Two issues remain: 1) TOD signal - I'm hoping to use a tuned 555 timer to run at 50Hz 2) power-managment, that is switching off chips that aren't necessary when running on the LCD and batteries only. At this stage I was going to use a manual switch and a separate 5V "rail" for non-essential chips, later I could use some sort of solid-state switch. I imagine that the following parts could be disconnected safely and work with most text based software. * SID chip * character ROM The VIC ofcourse needs to stay because of the refresh cycles and I also use it in the kernal (to find active screen RAM). I'm also using a CMOS eprom. I could find some LP 4464's. Any other suggestions for chips which could be off-lined or swapped to save a few mA? I'm also assuming the short boards use less current because of the newer design /number of chips. Is this assumption correct? Regards, Nick PLEASE TAKE NOTE: The contents of this email (including any attachments) may be privileged and confidential. Any unauthorised use of the contents is expressly prohibited. If you have received this email in error, please advise us immediately (you can contact us by telephone on +61 8 9441 2311 by reverse charge) and then permanently delete this email together with any attachments. We appreciate your co-operation. Whilst Orbital endeavours to take reasonable care to ensure that this email and any attachments are free from viruses or other defects, Orbital does not represent or warrant that such is explicitly the case (C) 2000: Orbital Engine Company (Australia) PTY LTD and its affiliates - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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