Re: CP/M on //e?

[louiss@gate.net (Louis Schulman)]

In <53l3d2$552@newsflash.concordia.ca>, ds_spenc@alcor.concordia.ca (Doug Spence) writes:
>OK, I'll cross my fingers and try this.  I did fiddle with some switches, 
>but I didn't try every combination and as I have no documentation I 
>didn't really feel comfortable doing this.  Something akin to the "don't 
>mess with an undocumented jumper even if it's labeled 'sex and free 
>beer'" rule I guess. (paraphrased from Dave Haynie)
>
>
>Doug Spence
>DS_SPENC@alcor.concordia.ca

The switches work as follows:

S1:  Off allows the Z80 translator to add $1000 to all addresses loaded in
memory to avoid conflicts with the 6502.  This should be left off unless you
like memory conflicts.

S2:  On allows Apple DMA devices to interrupt the Softcard.

S3:  On allows the Z-80 to respond to Apple non-maskable interrupts

S4:  On allows the Z-80 to respond to Apple interrupts.

The default for all switches is off.  They should only be turned on if there is a 
specific reason to do so.

Louis

P.S.  The switch that enables sex and free beer existed in the prototype, but
was removed prior to production.