 Paul Gardner-Stephen
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c6e95f13f9
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import Retrofan's new startup banner
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2019-05-14 03:31:57 +09:30 |
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Paul Gardner-Stephen
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a34581e3ea
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implement STOP and END commands
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2019-05-13 03:47:34 +09:30 |
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Paul Gardner-Stephen
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699cc73b70
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add pre-built BASIC and KERNAL ROM images.
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2019-05-07 22:29:28 +09:30 |
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Paul Gardner-Stephen
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8a6fd814d7
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update README
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2019-05-07 22:29:22 +09:30 |
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Paul Gardner-Stephen
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621d470fe3
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update README discussion of copyright.
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2019-05-07 12:59:03 +09:30 |
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Paul Gardner-Stephen
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0f18e18e9b
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add explanations for remaining coincidental similarities
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2019-05-07 12:40:41 +09:30 |
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Paul Gardner-Stephen
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61b69ddf3d
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document many more cooincidental similarities with C64 ROMs
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2019-05-07 12:17:52 +09:30 |
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Paul Gardner-Stephen
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1bcdf6b738
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reorder some instructions to reduce coincidental similarity with BASIC ROM
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2019-05-07 11:39:47 +09:30 |
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Paul Gardner-Stephen
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84ae446f7b
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explain more KERNAL coincidental similarities.
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2019-05-07 11:22:16 +09:30 |
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Paul Gardner-Stephen
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3847631e0e
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rearrange initialisation of $00 and $01 to reduce cooincidental similarity with C64 KERNAL
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2019-05-07 11:21:52 +09:30 |
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Paul Gardner-Stephen
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81e7f27f1b
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explain a number of KERNAL coincidental similarities.
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2019-05-07 10:20:35 +09:30 |
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Paul Gardner-Stephen
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a6942281de
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finish documenting all cooincidental similarities with C64 BASIC ROM.
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2019-05-07 10:12:20 +09:30 |
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Paul Gardner-Stephen
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f595af2c41
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fix routine we had changed to be less coincidentally similar to one in C64 BASIC so that it works.
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2019-05-07 10:11:11 +09:30 |
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Paul Gardner-Stephen
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3fc264ac15
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explain more similarities. Go to some effort to avoid some similarities where we can see a way.
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2019-05-07 10:02:25 +09:30 |
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Paul Gardner-Stephen
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f15c7aa3a2
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fix scrolling / empty lines during LIST
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2019-05-07 07:34:47 +09:30 |
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Paul Gardner-Stephen
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f23b0d03e9
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fix many blank lines when scrolling
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2019-05-07 07:25:01 +09:30 |
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Paul Gardner-Stephen
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f031907abb
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don't allow IRQs during CHROUT to avoid all cursor pooh
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2019-05-07 07:04:15 +09:30 |
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Paul Gardner-Stephen
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d0797fedef
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reverse attempted cursor pooh fix.
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2019-05-07 06:56:00 +09:30 |
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Paul Gardner-Stephen
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94e25eb40e
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fix cursor pooh
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2019-05-06 22:41:41 +09:30 |
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Paul Gardner-Stephen
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2ad07c1a82
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tweak version number in startup banner
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2019-05-06 22:31:36 +09:30 |
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Paul Gardner-Stephen
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b1eff47e97
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replace simple startup message with Deft's fancy one
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2019-05-06 22:29:24 +09:30 |
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Paul Gardner-Stephen
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7183b3a39e
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fix initialisation of ZP
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2019-05-06 22:02:07 +09:30 |
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Paul Gardner-Stephen
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5359801149
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work around VICE bug
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2019-05-06 21:59:45 +09:30 |
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Paul Gardner-Stephen
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54ecbf9097
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implement joystick 1 cursor movement.
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2019-05-06 16:45:01 +09:30 |
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Paul Gardner-Stephen
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b3e446b64e
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show line number when BREAKing
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2019-05-06 07:14:53 +09:30 |
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Paul Gardner-Stephen
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0a46e7c135
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implement GOTO command
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2019-05-06 07:11:23 +09:30 |
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Paul Gardner-Stephen
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d8d7d878e4
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fix preservation of I flag in memory move routines.
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2019-05-06 07:09:46 +09:30 |
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Paul Gardner-Stephen
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7d1f7fb7c5
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begin implementing REM command.
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2019-05-06 07:06:19 +09:30 |
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Paul Gardner-Stephen
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fab8839c76
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allow RUN/STOP to stop LIST command.
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2019-05-05 22:36:17 +09:30 |
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Paul Gardner-Stephen
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4b88af9da0
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make SCNKEY routine actually do what it should. Issue #23
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2019-05-05 16:36:39 +09:30 |
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Paul Gardner-Stephen
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810dfb75af
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put setup VIC-II routine at $E5A0 for Advanced Pinball Simulator. Issue #23
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2019-05-05 16:31:24 +09:30 |
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Paul Gardner-Stephen
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e88f12f2ed
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put IOINIT at $FDA3. Issue #20
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2019-05-05 15:06:50 +09:30 |
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Paul Gardner-Stephen
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933351943f
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move all VIC-II initialisation from IOINIT to CINT. Issue #20
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2019-05-05 15:06:09 +09:30 |
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Paul Gardner-Stephen
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8f09d4e8e1
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fix typo. Issue #20
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2019-05-05 14:58:32 +09:30 |
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Paul Gardner-Stephen
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ccf4dbe5da
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implement $EA7E entry point and fix $EA31 entry point. Issue #20
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2019-05-05 14:57:42 +09:30 |
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Paul Gardner-Stephen
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1d850ad7c3
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place some routines at well known expected locations.
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2019-05-05 02:24:34 +09:30 |
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Paul Gardner-Stephen
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4a374b27be
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Fix LIST output for Nebulus: line links with high byte = $00 = end of program.
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2019-05-05 02:21:47 +09:30 |
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Paul Gardner-Stephen
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49536d8378
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fix handling of EOI marker so we can load more than one program in life of system
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2019-05-05 02:15:46 +09:30 |
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Paul Gardner-Stephen
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1005ee4952
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fix detection and reporting of FILE NOT FOUND error
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2019-05-05 02:02:01 +09:30 |
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Paul Gardner-Stephen
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4ddd31176e
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remove debug output
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2019-05-05 01:40:57 +09:30 |
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Paul Gardner-Stephen
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98f2d022ce
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stop after completing a LOAD command.
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2019-05-05 01:40:45 +09:30 |
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Paul Gardner-Stephen
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e6fee5e979
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fix more problems with loading. Now SEARCHING FOR message works.
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2019-05-05 01:38:51 +09:30 |
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Paul Gardner-Stephen
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e547b56003
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fix various problems with LOAD taking a real filename. More to do.
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2019-05-05 01:26:37 +09:30 |
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Paul Gardner-Stephen
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f14cf20c92
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explicitly compare read result with zero now that under ROM routines preserve P
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2019-05-05 00:54:53 +09:30 |
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Paul Gardner-Stephen
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66964ab567
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fix routines to peek/poke under ROMs
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2019-05-05 00:53:14 +09:30 |
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Paul Gardner-Stephen
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000b87b87b
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send whole filename, instead of first char until end of time.
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2019-05-05 00:52:41 +09:30 |
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Paul Gardner-Stephen
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4958ad696f
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more work towards making LOAD command accept filename
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2019-05-05 00:45:26 +09:30 |
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Paul Gardner-Stephen
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2824abafd9
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remove debug output
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2019-05-05 00:27:01 +09:30 |
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Paul Gardner-Stephen
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74aaf9fe3f
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fix bug in print_integer with digit 9
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2019-05-05 00:25:15 +09:30 |
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Paul Gardner-Stephen
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5586e61ab9
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fix loading files > 255 bytes long.
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2019-05-05 00:14:21 +09:30 |
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Paul Gardner-Stephen
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f80b49b845
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relink BASIC lines after loading a program.
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2019-05-05 00:11:19 +09:30 |
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Paul Gardner-Stephen
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1b75d2bbfd
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remove debug
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2019-05-05 00:11:13 +09:30 |
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Paul Gardner-Stephen
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6d74679a5c
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set end of loaded memory pointer in BASIC LOAD routine. Other small fixes.
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2019-05-04 23:52:48 +09:30 |
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Paul Gardner-Stephen
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0a97a16552
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remove some debug output
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2019-05-04 23:41:19 +09:30 |
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Paul Gardner-Stephen
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19c9d655ce
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clear reverse video flag after displaying each line
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2019-05-04 23:41:07 +09:30 |
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Paul Gardner-Stephen
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4a3ea0d091
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Start implementing LOAD KERNAL routine to actually load where it should.
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2019-05-04 23:38:42 +09:30 |
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Paul Gardner-Stephen
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fa55c83fff
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generally remove some debug output, add missing file, and make KERNAL LOAD routine more complete.
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2019-05-04 23:12:54 +09:30 |
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Paul Gardner-Stephen
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d124349e50
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handle EOI and generally get closer to a working LOAD routine
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2019-05-04 23:05:23 +09:30 |
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Paul Gardner-Stephen
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287953dab6
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fix latching of initial clock sequence when receiving a byte
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2019-05-04 22:54:46 +09:30 |
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Paul Gardner-Stephen
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1e524eb8be
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send an invalid command instead.
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2019-05-04 22:30:36 +09:30 |
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Paul Gardner-Stephen
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ee87f4a775
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get to the point of being able to receive some bytes before locking up.
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2019-05-04 22:28:29 +09:30 |
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Paul Gardner-Stephen
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ea070f9bfe
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... and actually read the DATA bit when recording data in iec_rx_byte
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2019-05-04 22:20:57 +09:30 |
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Paul Gardner-Stephen
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c80ff23599
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... and fix the same stupid use of wrong bit in iec_wait_for_clock_assert
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2019-05-04 22:18:41 +09:30 |
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Paul Gardner-Stephen
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b1945095fc
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fix stupid checking of wrong bit in iec_wait_for_clock_release
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2019-05-04 22:16:47 +09:30 |
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Paul Gardner-Stephen
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acbac9e5f8
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simplify and fix iec_turnaround_to_listen based on 1541-III documentation
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2019-05-04 22:13:59 +09:30 |
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Paul Gardner-Stephen
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37277ba5a3
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try just reading error channel as a test
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2019-05-04 22:09:42 +09:30 |
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Paul Gardner-Stephen
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d0932029bb
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actually try 255 times before giving up when waiting for talker turnaround.
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2019-05-04 22:09:19 +09:30 |
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Paul Gardner-Stephen
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84841ab283
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fix bug in iec_tx_byte in acknowledgement check.
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2019-05-04 22:01:36 +09:30 |
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Paul Gardner-Stephen
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cdbb1b8c58
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implement dummy read from command channel routine to aid debugging
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2019-05-04 18:09:40 +09:30 |
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Paul Gardner-Stephen
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27432fa745
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fix clearing C flag on return.
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2019-05-04 18:08:57 +09:30 |
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Paul Gardner-Stephen
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c536780970
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fix mounting of disk image for test to not auto-run anything
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2019-05-04 17:25:48 +09:30 |
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Paul Gardner-Stephen
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eedc7e7b7e
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mount a D64 in VICE during tests, so that there is something to read
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2019-05-04 17:13:27 +09:30 |
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Paul Gardner-Stephen
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6dd434c688
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go back to trying to debug real file situation
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2019-05-04 17:08:21 +09:30 |
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Paul Gardner-Stephen
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79017d2d50
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fix FILE NOT FOUND detection in IEC ATN turnaround
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2019-05-04 17:07:05 +09:30 |
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Paul Gardner-Stephen
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8994f3c608
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generally try to debug the FILE NOT FOUND situation
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2019-05-04 17:00:40 +09:30 |
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Paul Gardner-Stephen
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49d5733246
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fix some bugs in IEC ATN turnaround
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2019-05-04 16:59:37 +09:30 |
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Paul Gardner-Stephen
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cc92b7d7e0
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fix typo in iec_release_atn
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2019-05-04 16:37:24 +09:30 |
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Paul Gardner-Stephen
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66c319f116
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fix timeout comparison in iec_tx_byte
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2019-05-04 16:35:04 +09:30 |
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Paul Gardner-Stephen
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7c89705dc6
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nope, that didn't help at all, but did indeed result in live-lock as feared.
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2019-05-04 12:02:52 +09:30 |
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Paul Gardner-Stephen
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3e0c6e3c1e
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try to fix ATN turn around to listen
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2019-05-04 12:02:25 +09:30 |
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Paul Gardner-Stephen
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9f05cc3e4c
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instrument to debug loading.
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2019-05-04 11:52:14 +09:30 |
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Paul Gardner-Stephen
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cc3c17a48a
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add missing file
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2019-05-04 11:47:52 +09:30 |
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Paul Gardner-Stephen
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9f6f179666
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implement the rest of iec_rx_byte
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2019-05-04 11:46:51 +09:30 |
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Paul Gardner-Stephen
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dec2714ba0
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begin implementing iec_rx_byte and rest of LOAD sequence
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2019-05-04 11:30:03 +09:30 |
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Paul Gardner-Stephen
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92ac67d6a7
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fix the bits we are setting and checking in IEC turn around to listen.
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2019-05-04 11:22:02 +09:30 |
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Paul Gardner-Stephen
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e5cdf77d50
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more work towards IEC bus support: Work on LOAD routine and the necessary IEC functions for it.
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2019-05-03 21:30:32 +09:30 |
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Paul Gardner-Stephen
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148a285633
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correctly detect device not present
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2019-05-02 21:55:11 +09:30 |
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Paul Gardner-Stephen
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dcebe17e51
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fix inverted sense of DATA line when writing bytes. We can now get a device to respond to an ATN byte.
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2019-05-01 23:02:29 +09:30 |
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Paul Gardner-Stephen
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e67eb37937
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remove redundant IEC port write during TX setup
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2019-05-01 22:45:18 +09:30 |
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Paul Gardner-Stephen
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86a579e91c
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don't corrupt Y register in iec_wait60ns
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2019-05-01 22:45:02 +09:30 |
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Paul Gardner-Stephen
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568bbb1cb2
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fix iec_release_clk to release correct bit
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2019-05-01 22:44:29 +09:30 |
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Paul Gardner-Stephen
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3a8200d66d
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IEC serial bytes have 8 bits, not 9. Fix logic to count 8 bits on TX
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2019-05-01 22:16:33 +09:30 |
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Paul Gardner-Stephen
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7caae74955
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move debug code for testing IEC bus
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2019-05-01 22:12:33 +09:30 |
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Paul Gardner-Stephen
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9f0880ed7e
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fix sense of DATA line reading.
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2019-05-01 22:11:17 +09:30 |
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Paul Gardner-Stephen
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38b35d05ad
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fix asserting ATN line.
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2019-05-01 22:10:57 +09:30 |
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Paul Gardner-Stephen
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af7e93476c
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setup DDR for IEC serial bus
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2019-05-01 21:52:22 +09:30 |
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Paul Gardner-Stephen
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687ed9c56a
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more work towards IEC bus. Also don't corrupt $DD00 VIC-II bank bits in the process.
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2019-05-01 21:47:00 +09:30 |
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Paul Gardner-Stephen
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16dcfbe22b
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begin implementing IEC serial protocol.
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2019-05-01 21:40:32 +09:30 |
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Paul Gardner-Stephen
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27b33c2b26
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use more space efficient calling convention for calling errors
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2019-05-01 07:37:52 +09:30 |
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Paul Gardner-Stephen
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b45e7aab65
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RUN does implicit CLR
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2019-04-29 23:23:30 +09:30 |
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