Thanks Philip. So if I understand . Lower 32k space has either m100 Rom or ram. . Upper 32k space has a single ram block.
I guess you access the disks using the fine grained ram access? 1kb at a time? On Saturday, July 8, 2017, Philip Avery <pav...@xtra.co.nz> wrote: > Thanks Steve > > Yes, bank switching to std ROM for interrupts. Also means ROM calls from > Basic, C or any language can easily be made as long as it's finally > despatched from himem (above 8000H). > > A memory map should answer your queries: > 0 - 7FFFH M100 ROM > 8000H - FFFFH CPM RAM (0-32KB) > 10000H - 17FFFH CPM RAM (32KB - 64KB) > 18000H - 57FFFH Disk A > 58000H - 97FFFH Disk B > > Philip > > > > On 9/07/2017 11:53 AM, Stephen Adolph wrote: > > Wow! Phil you've been busy! > > I'll have to think about what you're doing with the memory banks. > I assume you are also in all ram mode? Are you bank switching to std Rom? > > In terms of hardware... not easy to map to rex. Rex2 maybe. > > But one could imagine a hybrid that uses the rex technique for writing to > a read only socket to enable at least 3 banks of ram. > > > > On Saturday, July 8, 2017, Philip Avery <pav...@xtra.co.nz > <javascript:_e(%7B%7D,'cvml','pav...@xtra.co.nz');>> wrote: > >> Well, it's arrived as far as Virtual T. It will need a new hardware >> device developed to use on a real M100. >> >> Over a decade in the making (started in 2006), I present 64K CP/M 2.2 >> running in VT with Remem enabled. The Remem is used as RAMdisk, to emulate >> two disk drives of about 241KB each. >> >> To share this with the group, it would be easiest to share my VT >> remem.bin (6MB). Together with my instructions in pdf, you'll be on the air >> very quickly. >> John Hogerhuis: May I send this to you to host on the bitchin.com site? >> Ken Pettit: Will my windows variant of remem.bin work with all the other >> variants of VT 1.7? >> >> While in theory it will work on a real M100 with Remem, and with >> additional software could use a NADSBox to talk to the modern world (SD >> card) - I think as these two items aren't readily available, it would best >> if a new hardware solution is developed. Now that it's working in the M100 >> environment, it's relatively straightforward to modify the BIOS to work >> with any RAMdisk, other storage device or even a wireless solution. >> >> Thanks to Mike Stein for some beta testing. >> >> Philip >> > >
