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Scott's Notes
Just random stuff from my RC2014 build...
Configurations
smb_sio - RC2014 with SIO board
smb_sio_vfd - RC2014 with SIO board and VFD board
smb_sio_vfd_8in - RC2014 with SIO board, VFD board, and 8inch floppy
smb_acia - RC2014 with ACIA board (original RC2014 serial board)
smb_acia_vfd - RC2014 with ACIA board and VFD board
smb_z180_asci_vfd - RC2014 with Z180 CPU using built-in ASCI (better be 18.432 Mhz crystal!)
smb_z180_sio_vfd - RC2104 with Z180 CPU using SIO/2 board, install separate crystal in SIO/2 board
Scott's canonical port numbers
00 - vfd
48, 50, 51, 58 - floppy
70, 78 - bank select
74, 7C - bank enable
80, 81 - SIO/2 (aliases whole 8x range)
8" floppy notes
The 8inch drives as received were configured:
842 - cut X, Z, HL; short C
head load from pin 18 and drive select
stepper motor always energized
DT/8 - same as the 842, but with Y also shorted
this drives the inuse LED from head load
suspect the Y jumper was missing on the 842
Use this configuration for WD37C65 special mode:
842 - cut B, HL; short C
head load from pin 18
stepper motor always energized
(short DS-near-J2 to only energize stepper motor on drive select)
Note: WD37C65 special mode polls drive readiness by asserting DS
about 1000 times per second. If head load or stepper is
drive by DS, then they will sing.
Modifications to 34-50 adapter
route NC6 to HL
Modifications to floppy controller
route HL to NC6
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