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Author SHA1 Message Date
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
318cdb41ea Adds SCSI bus clocking to the Macintosh, and fixes its internal counting. 2019-09-02 16:03:33 -04:00
Thomas Harte
2f8e31bc8b Takes a first bash at implementing the new SCSI::Bus timing infrastructure. 2019-09-02 13:00:01 -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
1a60ced61b Starts trying to deal with creating a whole volume from merely a partition. 2019-08-25 23:03:54 -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
30cef1ee22 Adds write support. 2019-08-25 15:16:35 -04:00
Thomas Harte
5598802439 Makes the static analyser aware of mass-storage devices. 2019-08-25 15:10:09 -04:00
Thomas Harte
1c6720b0db Adds new class to Xcode project. 2019-08-25 15:09:43 -04:00
Thomas Harte
404b088199 Adds a trivial mass-storage device, for Macintosh HFV volumes. 2019-08-25 15:09:27 -04:00
Thomas Harte
7d61df238a Localises #include. 2019-08-25 15:09:04 -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
Thomas Harte
8e274ec5d0 Merge branch 'master' into SCSI 2019-08-21 22:38:18 -04:00
Thomas Harte
bb1a0a0b76 Sketches out further SCSI infrastructure. 2019-08-21 22:37:39 -04:00
Thomas Harte
252650808d Starts seeking to unbind SCSI bus logic and command performance. 2019-08-19 22:47:01 -04:00
Thomas Harte
e3d9254555 Implements phase-match bit. 
Seemingly causing the command phase to proceed.
 2019-08-18 23:15:54 -04:00
Thomas Harte
90cf99b626 Takes a wild swings at speeding up startup. 
With no success.
 2019-08-18 22:40:16 -04:00
Thomas Harte
955e909e61 Attempts to nudge the command phase further towards functioning. 2019-08-18 22:39:27 -04:00
Thomas Harte
8339e2044c Switches to proper SCSI terminology and better attempts a command phase. 2019-08-18 15:10:07 -04:00
Thomas Harte
0e0c789b02 Starts attempting to introduce a direct access device. 
Without having access to the SCSI-1 standard, a lot of this is guesswork.
 2019-08-17 23:43:42 -04:00
Thomas Harte
7e001c1d03 Corrects data line loading. 
Also adds some extra temporary logging. Outstanding question: why is ATN not being signalled? Is SEL enough?
 2019-08-17 21:30:59 -04:00
Thomas Harte
9047932b81 Corrected basic error. Arbitration now seems to succeed. 
This is seemingly followed by a pattern of signalling BUSY+SEL followed by just SEL with the various other potential device IDs in turn. To which nothing ever responds as currently implemented.
 2019-08-15 23:28:30 -04:00
Thomas Harte
f668e4a54c Makes an attempt at getting the 5380 past arbitration. 
Not entirely successful. Also gets a bit smarter with `final` on ClockingHint::Sources.
 2019-08-15 23:14:40 -04:00
Thomas Harte
ce1c96d68c Starts thinking out the mechanics of emulating a SCSI-1 bus. 2019-08-13 23:09:11 -04:00
Thomas Harte
0f67e490e8 Adjusts NCR address decoding to produce a more plausible initial interaction. 2019-08-11 22:43:25 -04:00
Thomas Harte
895c315fa5 Increases the Mac Plus too 4mb. 2019-08-11 21:41:12 -04:00
Thomas Harte
a90a74a512 Stubs in just enough of the 5380 to get a Mac Plus too boot. 2019-08-11 20:55:20 -04:00
Thomas Harte
3e1286cbef
Merge pull request #644 from MaddTheSane/patch-1 
Update CSMachine.mm
 2019-08-11 19:25:16 -04:00
Thomas Harte
949c1e1668 Adds an empty shell for what will be my 5380 implementation. 2019-08-10 23:53:52 -04:00
Thomas Harte
bbd4e4d3dc Enhances memory map fidelity to allow for ROM holes on the Mac Plus. 
This is how the ROM detects the difference between the Plus and the 512ke, it seems.
 2019-08-10 23:53:34 -04:00
C.W. Betts
4c5f596533
Update CSMachine.mm 
No need to create a temporary NSNumber object to be passed to a variadic method.
 2019-08-10 00:43:30 -06:00
Thomas Harte
4859d3781b
Merge pull request #643 from TomHarte/Mac512 
Simplifies just-in-time usage of the IWM, and the disk-speed accumulator
 2019-08-07 21:51:07 -04:00
Thomas Harte
bac0461f7f Switches the drive-speed accumulator to the delegate pattern. 
This allows the Macintosh to ensure that the IWM is kept up just-in-time with drive speed changes.
 2019-08-07 21:39:23 -04:00
Thomas Harte
f26a200d78 Switches to a JustInTimeActor to wrap the IWM. 
Also simplifies potential future usage of the IWM template.
 2019-08-07 21:28:02 -04:00
Thomas Harte
28ccb7b54e Merge branch 'master' of github.com:TomHarte/CLK 2019-08-04 21:34:49 -04:00
Thomas Harte
b6e4c8209b Switches to showing 'File -> Open...' at launch. 
As per the prevailing wind.
 2019-08-04 21:34:30 -04:00
Thomas Harte
16548f0765
Merge pull request #642 from TomHarte/InterruptSampling 
Moves timing of interrupt sampling into prefetch queue advancement.
 2019-08-04 21:20:22 -04:00
Thomas Harte
6a80832140 Moves timing of interrupt sampling into prefetch queue advancement. 
As per comment, that is definitely the only place it can occur; I don't know whether it always occurs there.
 2019-08-04 21:06:34 -04:00
Thomas Harte
c6cf0e914b
Merge pull request #641 from TomHarte/DIVSTiming 
Substantially improves DIVS timing.
 2019-08-04 20:46:50 -04:00
Thomas Harte
35b1a55c12 Corrects DIVS negative flag. 2019-08-04 20:36:33 -04:00
Thomas Harte
e3794c0c0e Takes a second pass at DIVS timing, seeming to correct that side of things. 2019-08-04 20:33:43 -04:00
Thomas Harte
f88dc23c71 Corrects comment. 2019-08-04 20:30:41 -04:00
Thomas Harte
0e293e4983 Relocates RAM delay test in order to scrape out a minor performance win. 2019-08-03 21:46:45 -04:00
Thomas Harte
e334abfe20 Partitions the 68000 arithmetic tests, to allow easier per-instruction execution. 2019-08-03 17:44:47 -04:00