18 Jul
2018
18 Jul
'18
9:02 a.m.
On 18 Jul 2018, at 03:22, Fred Cisin via cctalk <cctalk at classiccmp.org>
wrote:
Could the Gotek firmware, and some drivers on PC's with "HD" or
"ED"
controllers, be kludged together to get faster data transfers?
Replying to myself here but these are the current config file parameters, I
think either setting ibmpc-hdout or one of the pin2 settings will enable
faster transfers.
Drive Emulation:
-
*interface* = shugart | ibmpc | ibmpc-hdout | akai-s950 | amiga | jc*
- Pin assignments of the floppy-drive interface
- *shugart*: Shugart interface (Amiga, Atari ST, many others)
- *ibmpc*: IBM PC interface, no output on pin 2
- *ibmpc-hdout*: IBM PC, high-density-select output on pin 2
- *akai-s950*: Akai S950
- *amiga*: Drive ID hack on pin 34. Use *shugart* instead when
possible.
- See Amiga-specific hints
<https://github.com/keirf/FlashFloppy/wiki/Host-Platforms#commodore-amiga>
for advice on this setting.
- *jc*: Specified by jumper JC (closed = IBM PC, open = Shugart)
-
*host* = unspecified* | acorn | akai | ...
- Host platform: Improves image-format detection for generic types such
as IMG
- *acorn*: Acorn ADFS
- *akai*: Akai synths (S01, S20, S950)
- *dec*: DEC (RX33, RX50)
- *ensoniq*: Ensoniq synths (ASR/TS series, and others)
- *gem*: General Music (S2, S3, S2R)
- *memotech*: Memotech
- *msx*: MSX
- *pc98*: NEC PC-98
- *pc-dos*: PC DOS Format (geometry determined from Bios Parameter
Block)
- *ti99*: TI-99/4A
- *uknc*: UKNC, DVK (Soviet PDP-11)
- *unspecified*: Detection based on image-name suffix only
-
*pin02* = auto* | nc | low | high | rdy | nrdy | dens | ndens | chg |
nchg
- Manually assign a signal to floppy interface pin 2
- *auto*: Automatically determined from *interface =* setting
- *nc*: Unused / No Connection
- *low*, *high*: Constant low (0v) or high (5v) voltage
- *rdy*, *nrdy*: Drive ready, or logical complement
- *dens*, *ndens*: Density mode (HD = 0v), or logical complement
- *chg*, *nchg*: Disk changed, or logical complement
-
*pin34* = auto* | nc | low | high | rdy | nrdy | dens | ndens | chg |
nchg
- Manually assign a signal to floppy interface pin 34
-
*write-protect* = yes | no*
- Are images write protected when initially mounted?
- Protection can be toggled by holding eject for 2 seconds
- *yes*: Forcibly write-protect images
- *no*: Respect the FAT read-only attribute
-
*side-select-glitch-filter* = 0-255 (0*)
- Filter glitches in the SIDE-select signal shorter than N microseconds
- Useful on some old hardware (eg. CP/M systems)
-
*track-change* = instant* | realtime
- Rotational offset of data after a track change
- *instant*: No rotation during track change
- *realtime*: Emulate rotation of disk while track is changing
-
*index-suppression* = yes* | no
- Are index pulses suppressed when RDATA and WDATA inactive?
- Older systems may depend on constant index pulses (eg. BBC Micro)
--
adrian/witchy
Owner of Binary Dinosaurs, the UK's biggest home computer collection?
t: @binarydinosaurs f: facebook.com/binarydinosaurs
w: www.binarydinosaurs.co.uk
On 18 July 2018 at 08:37, Adrian Graham <binarydinosaurs at gmail.com> wrote:
On 18 Jul 2018, at 03:22, Fred Cisin via cctalk <cctalk at classiccmp.org>
wrote:
Could the Gotek firmware, and some drivers on PC's with "HD" or
"ED"
controllers, be kludged together to get faster data transfers?
Good question. I?ll ask since that could be implemented with a line in the
config file. Keir is constantly updating the firmware to add extra features
so it might be there already.
3" and 3.25" were also almost completely compatible with the
"standard" 34
pin interface. Although I remember one drive that had 5V and 12V swapped
in its 4 pin power connector! And my 8" drives did not standardize power
connector and requirements.
Early Amigas had +5 and +12 swapped . I didn?t realise this and the first
time I hooked up a Gotek to my A500 it cooked the USB stick but thankfully
didn?t kill the logic on the board.
--
adrian/witchy
Owner of Binary Dinosaurs, the UK's biggest home computer collection?
t: @binarydinosaurs f: facebook.com/binarydinosaurs
w: www.binarydinosaurs.co.uk