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altivoOn April 28? Ugh. But that's tonight's warning, particularly for predawn hours of the 28th. Closed the top of the hot frame again after picking mustard greens out of it for tonight's salad. Shut all the barn doors. Hope the apple blossoms don't freeze. Otherwise it was a pretty day, all blue and sunny. Quite a contrast to the original weather forecasts for the week, which called for rain every single day and night.
Looking at CP/M emulation to help with a project I've agreed to be on: porting the CP/M operating system to the Radio Shack Model 100 computer and its brethren. This looked far off or impossible until now because the memory map of a Model 100 family machine is too inflexible and partly ocupied by ROM. CP/M is happiest with RAM at least in the bottom 32K of the address space, while Radio Shack 8-bit computers usually had ROM at the bottom. The usual trick prior to the Model 4, was to insert mapping circuitry to readdress the ROM and substitute RAM for it. That's the approach being taken with the Model 100, too. One of the real engineers in the group has designed a little adapter that does the trick. Now we just need to create a BIOS and a boot loader.
A discussion on MP3 CD's at the beginning of the week among our library group's catalogers took an amusing turn this afternoon when my boss dredged up something I'd written back in January 2004 explaining the MP3 CD and the role it can play. It seems I was right on target, too.
Looking at CP/M emulation to help with a project I've agreed to be on: porting the CP/M operating system to the Radio Shack Model 100 computer and its brethren. This looked far off or impossible until now because the memory map of a Model 100 family machine is too inflexible and partly ocupied by ROM. CP/M is happiest with RAM at least in the bottom 32K of the address space, while Radio Shack 8-bit computers usually had ROM at the bottom. The usual trick prior to the Model 4, was to insert mapping circuitry to readdress the ROM and substitute RAM for it. That's the approach being taken with the Model 100, too. One of the real engineers in the group has designed a little adapter that does the trick. Now we just need to create a BIOS and a boot loader.
A discussion on MP3 CD's at the beginning of the week among our library group's catalogers took an amusing turn this afternoon when my boss dredged up something I'd written back in January 2004 explaining the MP3 CD and the role it can play. It seems I was right on target, too.
