Date: 2003-08-25 10:53:07
Hi All, I'm a little confused about the track/sector information given by various sources (including the Inner Space Anthlogy) for some of the older drives. They talk also about cylinders... and that confuses me. What I'm after is "logical" info, that is the layout a programmer would use. I am thinking that the D9090 is laid out as: 918tracks (1-918), 32 sectors (0-31). etc. Can someone confirm this, and also the layouts of the other drives of this era? is there a standardised detection routine for the D9060/9090? It seems you can stick any mechanism in the box and it will work... but... Regards, Nick -----Original Message----- From: Oliver Achten [mailto:firstname.lastname@example.org] Sent: Thursday, 21 August 2003 5:25 AM To: email@example.com Subject: Re: Building an external CPU accelerator > >>>>> "OA" == Oliver Achten <firstname.lastname@example.org> writes: > > OA> So perhaps a low-profile SuperCPU could look like the following: > > OA> -64K high speed SRAM for caching the C64 area. > OA> - 128K 29F010 ROM (55ns -> no delay) for BIOS/OS. > OA> - 1 byte write cache > OA> - mirroring disabled for $0000 - $01ff for faster execution > OA> - expansion connector for hardwrare additions > OA> - perhaps a socket for a 512K sram chip? > > Considering that you just listed the hardware features of the SCPU, in > what way would your project be simpler..? :) The biggest simplification lies in the lack of defining windows for certain memory areas for faster memory writes. The SCPU has lots of registers for this issue, this accelerator would have a fixed window @ $0000-01ff, the most important memory area in the system, to make it possible to integrate the logic into a smaller CPLD. Using a fast ROM instead of enabling reads to the SLOW Roms for copying it into the ram also simplifies the circuit. The best solution would be that in the end, the circuit would be simple enough that everyone can re-build it without too much hassle. -- COMPUTERBILD 15/03: Premium-e-mail-Dienste im Test -------------------------------------------------- 1. GMX TopMail - Platz 1 und Testsieger! 2. GMX ProMail - Platz 2 und Preis-Qualitätssieger! 3. Arcor - 4. web.de - 5. T-Online - 6. freenet.de - 7. daybyday - 8. e-Post Message was sent through the cbm-hackers mailing list - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Your Engineering Solutions Provider http://www.orbeng.com.au/orbital/engineeringServices/engServices.htm - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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) 2003: Orbital Engine Company (Australia) PTY LTD and its affiliates Message was sent through the cbm-hackers mailing list
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