Re: It's alive!

[Rich Camarda <rcam...@aol.com>]

Hi Andrew,

Thanks for the input. Yeah it would be good to treat the RAM drive
sort of like the Compuro RAM drives where RESET did not wipe out the
contents.

Ok, I just uploaded 3 pics showing Wordstar 3.0 running on the SBC.

1st pic shows the WS files in the F> directory, 2nd pic is Wordstar
loading, and 3rd pic shows WS up and working,  ready to edit!

Rich

On Jul 1, 8:19 pm, oh5nxo <juha.n...@quicknet.inet.fi> wrote:
> The DS1210 has strange way to indicate a dry battery.
> It blocks 2nd memory access if VBAT is under 2 volts.
> I thought the Z80 refresh cycles would be harmful here,
> but fortunately they aren't. Upper address bits come from
> register I during /RFSH, don't they ? I is cleared by reset, and
> accesses go to rom until banks are changed.
>
> It would be interesting to qualify /MREQ with inverted /RFSH
> and check if there is any effect in power consumption.
>
> This doesn't always start properly when powercycled from supply.
> My own fault, shouldn't have replaced LS14 with 04.
> Or maybe the delay in bootstrap should be longer, DS1210
> takes a long time (hundreds of milliseconds ?) to wake and allow
> accesses. RAM contents have been safe though, overnight.
>
> Juha