20 Nov
2018
20 Nov
'18
11:07 a.m.
On 2018-Nov-20, at 5:11 AM, Al Kossow via cctalk wrote:
On 11/19/18 11:54 PM, Brent Hilpert wrote:
(The TS-1 data files have been sent to Al.)
I did happen to RE the keyboard and analyse it's functioning some as it needed repair,
so that's included in the schematic bits.
The PCB-transformer key design is novel, but (in the TS-1) so is the scanning &
communication.
There is no microcontroller on the keyboard, scanning is performed by the main unit, it
sends a key matrix address to the keyboard in serial, the keyboard sends back nothing but
a binary key-pressed indication.
I didn't have need / get as far as doing an
I/O map or memory map for the Z80.
Should I send these files along?
Yes, please to dumps/docs and board/terminal pics from you and Mike!
I'm sure Richard would appreciate these as well for the terminals wiki.
They have a preliminary memory and I/O map in the MAME driver
Falco keyboards are pretty funky. They use transformer-coupled switches
with a core that slides between coils on the top and bottom of the PCB
They appear to use a serial bitstream for the keypresses. EPROM dumps
from the later keyboards with an 8035 would be very useful too, since
CHM has a later model 52xx terminal with a 5 pin DIN, but I've been
unable to find the keyboard.
I'm guessing the TS-1 series all used the same PCB with different keyboards
and firmware.
The Fame series use 267x CRT controllers. The 52xx have a custom video ASIC
I've not seen the insides of any of the Fame series.