Thomas Harte
906b6ccdb7
This appears to be sufficient for the Electron to _read_ SCSI.
...
So that's step one.
2021-01-31 18:36:29 -05:00
Thomas Harte
8d4a96683a
Reduces output noise.
2019-09-18 21:41:29 -04:00
Thomas Harte
2f6c366668
Makes a concerted effort at properly wrapping a hard disk image.
2019-09-17 21:30:04 -04:00
Thomas Harte
934901447a
Adds a temporary version of block access writing.
...
Whatever I'm doing, it's still not correct. The Macintosh ostensibly appears to 0-fill the direct-access device, then reads a sector back and hangs.
2019-09-15 22:06:45 -04:00
Thomas Harte
c849188016
Adds format and write to the SCSI target.
...
Now I think I need to switch back to the 5380 to ensure proper DMA mode interactions when writing.
2019-09-12 21:58:09 -04:00
Thomas Harte
87e8dade2f
Implements READ BUFFER to do, you know, *something*. Plus READ CAPACITY.
...
The HD SC utility now offers up drive 6 for formatting. That's progress.
2019-09-11 21:52:02 -04:00
Thomas Harte
6fc5b4e825
Simplifies INQUIRY for future targets; implements enough of SENSE MODE to advance.
...
The HD SC setup utility is now looking to read buffer.
2019-09-08 21:59:56 -04:00
Thomas Harte
00ce7f8ae0
Takes a first shot at INQUIRY.
2019-09-07 22:04:44 -04:00
Thomas Harte
6e0e9afe2f
Fixed: to post a message, I want message in, not message out.
2019-09-07 13:35:38 -04:00
Thomas Harte
bee782234a
Ensures no state transitions while acknowledge is still asserted.
2019-09-07 13:17:34 -04:00
Thomas Harte
a4ab0afce3
Takes a shot at completing a full SCSI interaction.
2019-09-03 21:15:30 -04:00
Thomas Harte
1c7e0f3c9d
Fixes control line modification by the 5380 and SCSI target command chaining.
...
So now I'm back to trying to guess how a SCSI command terminates re: the relative meanings of a message phase and a status phase.
2019-09-02 23:14:37 -04:00
Thomas Harte
310c722cc0
Starts a transition to bus-level knowledge of SCSI-specific bus timing thresholds.
...
The idea being that bus attachees need not all count time for themselves. They can be very plain finite state machines.
New semantics are not yet implemented within the Bus. The plan is to do that, remove the internal counting of time within the NCR, then adjust the Target to be more explicitly stateful.
2019-08-31 21:44:22 -04:00
Thomas Harte
25956bd90f
Mildly improves temporary logging.
...
A deckchair shuffle, at best.
2019-08-26 22:35:11 -04:00
Thomas Harte
081316c071
Adds some additional commentary as this takes shape.
2019-08-25 17:46:05 -04:00
Thomas Harte
eafbc12cc1
Ensures a clean entry into the command phase.
2019-08-25 17:43:14 -04:00
Thomas Harte
ca08716c52
Introduces real hard disk images to the nascent world of SCSI.
2019-08-25 17:03:41 -04:00
Thomas Harte
c86db12f1c
Starts implementing DMA support on the 5380.
...
The Macintosh doesn't actually use the DMA signals, but uses pseudo-DMA mode so they nevertheless need to be appropriate.
2019-08-24 22:47:11 -04:00
Thomas Harte
ce2e85af8b
Adds missing bus state callouts.
2019-08-22 23:27:00 -04:00
Thomas Harte
2d82855f26
Attempts to provide a data out phase.
2019-08-22 23:16:58 -04:00
Thomas Harte
faec516a2c
Starts pushing towards figuring out a proper infrastructure for mass storage.
2019-08-21 23:22:58 -04:00
