Josh Dersch
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cbcfd2b47e
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Minor bugfixes, introduced a new timing infrastructure and moved DiskController over to it. Minor performance improvements; now running at 110% speed. Display timing is still too slow.
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2015-11-17 16:09:50 -08:00 |
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Josh Dersch
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03661fc90b
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Fixed display microcode and display controller. Alto display now generated 100% by microcode tasks. A few small optimizations.
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2015-11-16 16:46:24 -08:00 |
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Josh Dersch
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30ecfa6900
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Support for CRAM reading/loading, SWMODE support. Rough debugger UI for viewing / disassembling microcode in ROM1, RAM0 banks (ugly). Minor performance improvements.
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2015-11-13 16:50:18 -08:00 |
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Josh Dersch
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47a2ee4b2b
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Implemented temporary "fake" display controller which renders Alto DCBs to the screen, bypassing the display microcode. Alto is booting! Rough keyboard implementation.
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2015-11-11 16:34:44 -08:00 |
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Josh Dersch
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ca638f1d6e
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Initial rough implementation of Display hardware and associated tasks. Not really working.
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2015-11-10 17:04:05 -08:00 |
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Josh Dersch
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e1c90dbe01
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Fixed bug in carry flag on SUB operations; SUBLZ X,X now works correctly. Alto now appears to boot successfully. Skeleton of Display hardware added.
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2015-11-09 17:36:26 -08:00 |
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Josh Dersch
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e9a13529c1
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Implemented extended memory and fixed issues with S register 0 (which loads M).
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2015-11-05 17:29:41 -08:00 |
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Josh Dersch
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78e61389c1
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Fixed remaining disk issues; KSTAT bits 4-7 must always be "1," and head select change must reload current sector. Boot now loads in complete boot program and control is transferred to it.
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2015-11-05 13:49:32 -08:00 |
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Josh Dersch
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0358db09fe
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Adding readme.
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2015-11-04 17:02:14 -08:00 |
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Josh Dersch
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a689b7185a
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Fixed: Disk address (KADR) and Disk Data (KDATA) registers behave (more) correctly; in particular record commands hare processed properly and KDATA handles reads/writes more sanely. Fixed checksum calculation; due to above changes microcode now correctly validates checksums and boot progresses to read in an entire track's worth of data before dying with a "check failure" error.
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2015-11-04 16:49:42 -08:00 |
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Josh Dersch
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39f077bf7a
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A few fixes to DNS<- behavior and some tweaks to the disk controller. Boot code is progressing further.
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2015-11-03 16:21:12 -08:00 |
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Josh Dersch
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c0f23685b1
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Fixed instruction register decoding SFs for Emulator Task; first stab at handling (most) DNS<- operations including setting SKIP and CARRY flip flops. BLT now succeeds, Nova code in bootstrap is running.
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2015-10-29 17:02:22 -07:00 |
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Josh Dersch
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2918ede7ce
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Some fixes to emulator task dispatch functions, added Nova disassembler, nova instruction single-step and nova instruction breakpoint support. Penciled in DNS (Nova Shift) support in emulator task. Added skeleton for Logging.
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2015-10-28 14:11:04 -07:00 |
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Josh Dersch
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1dfd1e0be9
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Hooked disk emulation up to disk images (currently hardcoded). Fixed a small bug in IDISP, tiny stub of Nova disassembler added.
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2015-10-26 17:46:43 -07:00 |
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Josh Dersch
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3b29addb98
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Disk sector reads now work correctly, and checksums are correctly calculated. Still feeding dummy sector data.
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2015-10-23 16:07:07 -07:00 |
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Josh Dersch
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ea5a5f22ec
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Improvements to Disk Word Task.
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2015-10-20 15:32:26 -07:00 |
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Josh Dersch
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ee7c7fb035
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Implemented more Disk functionality, fixed bug in ACSOURCE dispatch in Emulator task.
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2015-09-16 16:27:16 -07:00 |
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Josh Dersch
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08d6063def
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Refactored Task code into separate files for readability; added breakpoint support and basic Memory window to debugger. Initial implementation (mostly stubs) of Disk hardware and Tasks.
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2015-09-14 11:27:16 -07:00 |
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Josh Dersch
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24d7a5a8fe
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Work begun on Disk controller, stubs for keyboard and a few bugfixes and tweaks.
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2015-09-04 18:03:47 -07:00 |
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Josh Dersch
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0ced1a2ef8
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Built basic debugger UI and execution framework; a few bugfixes. CPU now executes uCode up until the first STARTF (unimplemented).
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2015-09-01 17:06:57 -07:00 |
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Josh Dersch
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c4f8fe951f
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Finished ucode annotations.
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2015-08-31 15:58:46 -07:00 |
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Josh Dersch
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59d98d1909
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Refinement to CPU, implemented very rough diassembler and began annotation of official Xerox ucode sources with PROM addresses.
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2015-08-28 18:07:59 -07:00 |
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Josh Dersch
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9c3ee3afac
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Tweaks to ALU, CPU, Memory
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2015-08-21 17:12:28 -07:00 |
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Josh Dersch
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f1ffcb0547
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Implemented ALU, most of Memory state machine.
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2015-08-20 18:02:01 -07:00 |
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Josh Dersch
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5719ec4815
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Adding files that VS mysteriously excluded. I love tools.
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2015-08-20 09:55:26 -07:00 |
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Josh Dersch
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3b77ba875d
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Sketching in the rest of the CPU
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2015-08-19 16:50:40 -07:00 |
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Josh Dersch
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6193189b10
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Basic skeleton, ucode loading.
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2015-08-19 13:35:56 -07:00 |
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Josh Dersch
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a9cbef544f
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Initial commit to add default .gitIgnore and .gitAttribute files.
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2015-08-14 18:31:37 -07:00 |
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