David Banks
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efdd41a239
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6502: Added special command to inhibit IRQ/NMI
Change-Id: I6ba8a1b3b92e5852382d35eee7a59b6a9d7e63e8
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2019-06-15 17:50:29 +01:00 |
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David Banks
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285697d175
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6502: remove 40ns skew between phi1/phi2 outputs, as this erodes address hold time time from phi1
Change-Id: Idd2b1418a18f6bb5cf2b553b6a069c42a0e64b97
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2018-12-21 17:25:37 +00:00 |
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David Banks
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1dcf9fa247
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Updated lx9_dave/ice6502 with correct .ucf file and a new top-level design
Change-Id: Ic67e37fb876322983a44c35e9db08b1b8371aea2
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2018-11-20 17:32:02 +00:00 |
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David Banks
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c1b0902f96
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6502: Change din sampling from Phi0_b to Phi0_a
Change-Id: Id1cf604cfa61dba7aae8da670a38e460a059e7bb
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2018-02-15 13:06:25 +00:00 |
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David Banks
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a4aa6df31a
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Added new top level generics to 6502 and 6809 designs
Change-Id: I14d70471b97948c165210bebad88b60965531207
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2017-08-01 09:25:12 +01:00 |
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David Banks
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f2974d12df
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Swapped names of sw_interrupt_n and sw_reset_n (as they were wrong way around)
Change-Id: I8819b4898be3beb36ec7f2ecb97f6797a7ab03b2
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2017-08-01 08:18:20 +01:00 |
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David Banks
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6415a81a40
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On LX9 board, updated Tx=51 and Rx=55
Change-Id: I5bcd032eab29ef93d36e8011fee673028042483f
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2017-07-29 19:55:27 +01:00 |
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David Banks
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7453cf4f9f
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LX9 support: massive refactor of the build system
Change-Id: I75ff141a0d3b2c30a37d8f0e497f4f923e302b8b
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2017-07-26 14:59:20 +01:00 |
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David Banks
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78adf0030b
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LX9 support: corrected pin assignment in Z80CpuMonLX9Jason.ucf
Change-Id: Iacf21daea16b68a3886eb68618016e76c8dc0998
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2017-07-26 09:45:01 +01:00 |
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David Banks
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79d890bcb9
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LX9 support: in Z80CpuMon made the switch/led polarity configurable with generics
Change-Id: I026bc8e56fe760b453edf970b33f6897a695d0d2
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2017-07-25 19:18:59 +01:00 |
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David Banks
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17acd5afdd
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LX9 support: updated Z80CpuMon ucf file - not final yet!
Change-Id: I8dbf4f4012c3b43d8bdf07ca707d6d8b6ef8a1d1
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2017-07-25 19:17:55 +01:00 |
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David Banks
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0da1fa06bb
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LX9 support: work in progress
Change-Id: I76249db20f992f92c5fc0454f698c40e578b5e54
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2017-07-25 17:34:19 +01:00 |
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David Banks
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f64641f99c
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Added build scripts for xc3s500e
Change-Id: Icc7990c3ee257d1511fa478fd0d2b3575362eb29
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2016-10-24 14:24:18 +01:00 |
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David Banks
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6291faa4bd
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Updated to 0249 of the Z80 core by TobiFlex to fix issues with Spectrum Keyboard
Change-Id: I2d92c541cdb7feaad84bd3d37ec125594b6b47a8
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2016-08-22 14:46:41 +01:00 |
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David Banks
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de6f722978
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Adjusted Din sampling point ~40ns later so it co-incides with Phi2
Change-Id: Ibdd44b83a139b6560efc886e95714ee91daef3dc
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2016-08-01 16:34:47 +01:00 |
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David Banks
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5410c32db3
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Eliminated some warnings - changes mostly cosmetic
Change-Id: Ic7a7a107f9343bac2b49512d92ee2ad8f13c8bb2
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2015-11-29 12:22:13 +00:00 |
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David Banks
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de16b3af1a
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Eliminated some warnings - changes mostly cosmetic
Change-Id: I141b05c932d0736e689ff3a2cb2c90c24c850933
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2015-11-29 12:06:42 +00:00 |
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David Banks
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dd2ea9182b
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Fixed an incorrect module name
Change-Id: I952135d7be04e332ca4cc5de7f6491bc0fedf5ec
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2015-11-28 17:32:08 +00:00 |
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David Banks
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e63266f720
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Made AVR XPM and XDM more generic
Change-Id: I0025d56d4ba7fa3e20d73f09ac51068ffd1859c5
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2015-11-28 17:22:23 +00:00 |
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David Banks
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cc6c062b4b
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Updated XDM2Kx8 to a more portable implementation
Change-Id: I37cbe56b7b0113e24855eb1c0fcf7bbe006eefd3
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2015-11-28 11:19:27 +00:00 |
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David Banks
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a785d7e73f
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Refactored AtomFast6502 to use new MOS6502CpuMonCore - works in new Atom at 4MHz and with tube
Change-Id: I73c769919e2634a4656a6edec2c5a1100bd70083
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2015-11-15 11:50:06 +00:00 |
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David Banks
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55c8889881
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Updated reset output to avoid the use of a tristate signal in BusMonCore
Change-Id: I3f49317689eb5808a5edb5fe5b10552d01a3db59
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2015-11-15 11:37:50 +00:00 |
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David Banks
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dc6165f826
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Cosmetic tweaks to avoid warnings to Quartus
Change-Id: I9f044a50d599dfcd3d3b7bd46f6e99e1ef3e92b6
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2015-11-14 13:36:15 +00:00 |
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David Banks
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568fd2906d
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Fixed AlanD core 65C02 bugs: D was being set in IRQ/BRK; sync was inferring a latch
Change-Id: Ia7163e996c403a1caae04df10de3d7a42a91b45c
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2015-11-11 13:07:19 +00:00 |
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David Banks
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6aeb0c7b8a
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Refactor: 2nd stage - bug fixes
Change-Id: Ic3bd520d0cc8b74f33068c53085229506d6968b2
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2015-10-31 18:31:41 +00:00 |
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David Banks
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99c5f951d1
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Refactor: 2nd stage
Change-Id: I6959bbc88082cc46930f907378d42adf1abf180e
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2015-10-31 14:29:14 +00:00 |
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David Banks
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b563a030ee
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Refactor: 1st stage
Change-Id: I8889ff76ce802099fae67c147e110356adbd23ac
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2015-10-31 13:45:09 +00:00 |
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David Banks
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8a857ae45e
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Experimental AtomFast6502 adding bus mon function
Change-Id: Ib5115d9e7b736c45bb46a0a063325a0173b6f823
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2015-10-31 11:46:40 +00:00 |
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David Banks
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eaf6f90ab6
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ICE T65: Fixed the single stepping issue with AlanD's core (sync bug); increased CCLK rate to 25MHz
Change-Id: I226a63a10b80973001f4b0ee825dcecadaece8cb
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2015-10-27 19:34:02 +00:00 |
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David Banks
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3c31e9e875
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ICT T65: Fixed an issue the caused an immediate NMI on a Beeb Model B
Change-Id: I5f0e00fc5e4f647c81778821282316e812215cb8
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2015-10-27 18:03:45 +00:00 |
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David Banks
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344e03185d
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Reworked the 6502 single stepping to hide the fact that register writes are pipelined
Change-Id: I6d9157e3d9ade9af72e11d255b224cc7f210f376
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2015-10-26 16:44:25 +00:00 |
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David Banks
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9c4b9aa944
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In ICE-T65 fixed the timing of ICE initiated read/write cycles to give them a whole cycle
Change-Id: I6bfdf624ad4340a219096f231334ec8a9bbfc5af
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2015-10-26 12:54:17 +00:00 |
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David Banks
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92177196c0
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Experimental AtomFast6502 with a different clocking arrangement
Change-Id: Ic6f5275bc0982254e9b5508ec79f0365712657de
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2015-09-23 14:56:31 +01:00 |
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David Banks
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d3224a651d
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Fixed a bug with the I Flag being 0 rather than 1 following reset
Change-Id: Ifc1573026e93944d33a756bd601200441ba20c1d
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2015-08-29 20:57:49 +01:00 |
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David Banks
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d44d3a889e
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Updated 6809 clocking scheme; tested on Dragon 32 and Simple 6809; fixed 6809 reset command bug; version now 0.64
Change-Id: Id772f50d3676b057ed31c001b211fdf92a9f49f8
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2015-08-08 13:49:13 +01:00 |
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David Banks
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aeed6c1a65
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Further improvements to the clocking of the 6809 for Roland to try
Change-Id: Ida0384c65ca405f50652a3c26665d1c5adac0748
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2015-07-19 18:04:22 +01:00 |
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David Banks
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66b65f1bd6
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Changed 6809 timing to provide bags of write address setup and hold time, version now 0.62
Change-Id: I1da33ddd81253f123e231e3cfad7e086bd3de08d
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2015-07-16 18:16:07 +01:00 |
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David Banks
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d6c9287067
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Changed to 18K ROM/2K RAM, version now 0.60, bitfiles published for all three designs
Change-Id: I2dd2b203e68d3ddde7d8bbb9052d4d46b802fbbb
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2015-07-06 18:49:57 +01:00 |
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David Banks
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2677a945aa
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Corrected the function of EXTAL and XTAL; version now 0.53
Change-Id: Ib9c329b06827a83c8d9d307db12f16a91e2cb977
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2015-07-04 17:50:03 +01:00 |
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David Banks
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3afc09c07d
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Added a jumper to select between 6809 and 6809E clocking; increased breakpoints to 8; version now 0.52
Change-Id: If17d2d0ff336fde2aafd9613eba47bbe7392ad8c
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2015-07-04 16:51:08 +01:00 |
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David Banks
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34dacfb72e
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Reworked the 6809 single stepping to hide the fact that register writes are pipelined
Change-Id: I60d51d4584c44e36db37fb3953af818d83cf7958
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2015-07-04 14:51:40 +01:00 |
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David Banks
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17d02c19fa
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Increased Z80 drive to 4mA, as 2mA is barely sufficient to counter the 1K5 GODIL pullups
Change-Id: I09e512bb7415c6b69e97df7bae870647adcd12d4
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2015-07-04 14:49:59 +01:00 |
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David Banks
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20269623ea
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Initial checkin of ICE-6809; version now 0.49
Change-Id: I502840a0be0fa58adfc9ddb27c4e2a35a7c2849c
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2015-07-02 15:35:05 +01:00 |
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David Banks
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727a1c0f2a
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Implemented IO watches/breakpoints; fixed a bug with stepping through CB/DD/ED/FD prefixed opcodes which have 2 M1 cycles; version not 0.47
Change-Id: Iad5cb406bd96a8020ccb65be5cd440bebec20481
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2015-06-30 14:19:19 +01:00 |
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David Banks
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caec07483d
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Fixed a problem with breakpoints running on one instruction on the Z80, version now 0.46
Change-Id: I597087a8ed7d4da211c706e0c4972f5d037706ee
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2015-06-29 17:16:23 +01:00 |
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David Banks
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8a2615d6b3
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Added additional IO outputs to 6502 designs
Change-Id: I6253c507e766f8af13e52556818f725fda198cb4
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2015-06-29 14:47:31 +01:00 |
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David Banks
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6d0ec41db0
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Added commands to read/write/dump Z80 IO space; version now 0.45
Change-Id: I85e99f8c19bd285f2dd69ea46b0e662499a5d9e2
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2015-06-29 14:43:20 +01:00 |
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David Banks
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e66ecdfc3e
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Made sure CycleCount stopped when Z80 is paused
Change-Id: Ia5d4a7d216a089e06e1aaa86bcd43d512a429aaa
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2015-06-28 22:17:32 +01:00 |
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David Banks
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0c0fde6a32
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Working Z80 memory access and disassembler in the small GODIL, incremented version to 0.44
Change-Id: I718be7476ec330743c206e737389856fc4b41fc8
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2015-06-28 19:42:25 +01:00 |
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David Banks
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e4e0f864df
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Switched to Timing-Driven Packing, fixed a bug with instr wait states that meant single stepping executed RST 38 because FF was read off databus; increased comparators to 8; incremented version to 0.43. Works with 100pF capgit add -u!
Change-Id: Ie6c8c8fc610599516eb1baf957d001079713e462
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2015-06-27 18:40:12 +01:00 |
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