News: 4/17/24 - The Corsham 6800 replacement is now available. The 6809 replacement processor is undergoing testing and should be available soon.
NitrOS9 is also being tested. It appears to work but still needs a few things. The descriptors need some work. Descriptors /dd, /h1, /h2, /h3 don't really allow for reformatting of the SD images. While "format" does work it only produces about 700 sectors of space. The startup of the system still needs work. It appears the Boot ROM attempts to load from the SD shield before the shield is ready and gets hung. It requires a careful resetting of the shield followed by the processor to get NitrOS9 to boot. While a quick fix would be just to put a timer in the boot rom, wait 20 seconds then boot, a better fix would be a type of test for "ready" for the SD shield. I can guess the next question - will OS9 run on the Corsham board? Quick answer - yes. The drivers for the SD shield, clock and boot rom should be able to be simply inserted in existing OS9 code for the SWTPC. This would have OS9 running on the Corsham 6809 with SD shield. Part 2 of the answer - since there is already code for the SWTPC MP-09 for OS9, that code would work on a Corsham 6809 should the Corsham 6809 be installed in an SWTPC system. The current Corsham motherboard does not have enough slots to support OS9 with existing boards and drivers. A workable SWTPC system needs at least 3 SS30 boards - MP-S serial, FD-2 floppy controller, MC146818 clock board. For ease of use an SS30-IDE controller should be installed making the need for 4 SS30 boards.
Corsham SS50 Motherboard | Corsham Reproduction Motherboard. 3 SS50 slots 2 SS30 slots Supports 6800 and 6809 processor boards |
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Reproduction Corsham Extender Board Add 6 SS30 slots to your Corsham Motherboard Plugs into your Motherboard |
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Corsham 6802 Processor | Improved Reproduction of Corsham 6800 processor 2MHZ 52K RAM, 8K EPROM
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Corsham SD Card System | Corsham SD Mass storage System Can be used with 6800 and 6809 systems |
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Corsham SS30 RS232 Serial | Corsham Reproduction RS232 Serial board Can be used with 6800 and 6809 systems No plus and minus 12V supply needed |
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Corsham SS30 Parallel | Corsham Reproduction Parallel Board Provides Direct connection to SD Card System Use with 6800 or 6809 systems |
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SS30 Proto Board Small | SS30 Prototype Board | |
SS30 Proto Board Large | SS30 Prototype Board - Large | |
SS50 Proto Board | SS50 Prototype Board
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