Re: Banked CP/M 3.1 on Apple //e?

[Roger Johnstone <roger@ihug.invalid>]

In <20031222140918.15799.00000712@mb-m21.aol.com> Michael J. Mahon wrote:
> Steve Nickolas wrote:
> 
>>There is an unbanked "56K" CP/M 3.1 for the Apple //e out.  That's not 
>>a lot of memory and I was thinking about the possibility of modding 
>>the system to support the extra memory on the 128K //e, including 
>>possibly the RAM Works, and perhaps using that functionality to add 
>>additional support to CP/M for some block devices such as 3.5" disks (
>>perhaps this will be useful when the EMU][ Z80 is up to par)... 
>>Unfortunately when it comes to stuff I'm a n00b and not familiar with 
>>Z80  at all. :( So it's just a pipe dream... :(
> 
> That sounds like a _great_ idea!
> 
> I've always regretted that the development of CP/M on the Apple ended
> before the advent of large RAM cards.
> 
> -michael

The ALS CP/M Card has its own 64KB bank on the card, 61KB of which is 
available for running CP/M programs. The main bank of the IIe memory 
contains ProDOS and various bits, and the auxiliary bank is used for a 
60KB RAM disk. Since ProDOS remains in memory CP/M can use the ProDOS 
drivers for the clock and block devices. Storage on block devices is via 
virtual disks, so the device remains in ProDOS format. Even the 
auxiliary bank ProDOS RAM disk remains intact, and can be used for 
transferring files between CP/M and ProDOS.

More at http://homepages.ihug.co.nz/~rojaws/apple2/cpm.html

-- 
Roger Johnstone, Invercargill, New Zealand

PS/2 Mouse Adapter for vintage Apple II or Mac
order at http://vintageware.orcon.net.nz