Monitor for iSBC 8024

From: Eric Smith <eric_at_brouhaha.com>
Date: Sat Nov 4 12:06:36 2000

Allison wrote:
> To be exact the z80 has
[list of registers deleted]

You forgot IFF2. :-)

And both the Z-80 and 6502 have at least one more
bit that's "sort of" programmer visible, the NMI
edge-detect flop.

> 6502
> SP 9BIT (HIGH BIT =1)

It's either 8 bits, or 16 bits with the high 8 being stuck at "00000001".
There's no meaningful reason to consider it a 9-bit register. I personally
only find it sensible to count the bits that change, so I call it 8.

> STATUS 8BIT

7 bits, or 8 with one bit stuck high..
Received on Sat Nov 04 2000 - 12:06:36 GMT