7 Nov
1998
7 Nov
'98
11:55 a.m.
This manual (Chapter 10) describes a 'ROM Cartrudge II' that is provided as
a plug-in option in the HX-20. The ROM Cartridge II supplies from 8k to 32k
bytes of data. Data in the externam ROM memory unit is in the forrm of a
read-only ROM file. Data are read from the external ROM memory unit via
i/oports using an addressing counter and a shift register....
port info follows.....
-----Original Message-----
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
[HX20]
The microcassette drive was actually removable.
I don't know if Epson
ever released anything else that could plug into that space besides the
The hardware manual mentions (and gives a schematic for) an EPROM
cartridge that will fit up there. I've never tried to build one, but it
looks possible.
-tony
7 Nov
7 Nov
1:31 p.m.
On Sat, 7 Nov 1998, Mike wrote:
This manual (Chapter 10) describes a 'ROM
Cartrudge II' that is provided as
a plug-in option in the HX-20. The ROM Cartridge II supplies from 8k to 32k
bytes of data. Data in the externam ROM memory unit is in the forrm of a
read-only ROM file. Data are read from the external ROM memory unit via
i/oports using an addressing counter and a shift register....
Look on the left-hand side of the unit. See that small, rectangular black
door? That's where the expansion module plugs into. One of my HX-20's
has one. Apparently that adds another 32K of RAM.
Sellam Alternate e-mail: dastar(a)siconic.com
------------------------------------------------------------------------------
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8 Nov
8 Nov
2:56 a.m.
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