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180 Commits 4 Branches 8 Tags 7.3 MiB
1c44718f91
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93 Commits

Author SHA1 Message Date
David Banks
1c44718f91 Seperate 6502 and 65c02 builds 
Change-Id: I41af27c62e61a6490bda4da01da6e4f8740121fb
 2019-10-16 20:40:15 +01:00
David Banks
131312e0e9 Multiboot: initial impl 
Change-Id: I7efa2cf8079b4bfc1e89c5c26ecce30dfae34782
 2019-10-16 15:49:58 +01:00
David Banks
ddaa266c12 z80: fix a T80 build error on Spartan 3 
Change-Id: I6fca1eea44e1cc8e244d3d892ee25e0b7fea9eac
 2019-10-15 16:28:55 +01:00
David Banks
f710f7a20f z80: updated T80 to version 350 
Copyright (c) 2018 Sorgelig

Taken from https://github.com/EisernSchild/t80/commit/cbaa6450b

Changes I needed to make afterwards:
1. Fixup T80_Pack.vhd (missing params)
2. Replace T80a.vhd with my own version

Change-Id: I275153ffbddb0d9d5b2d8b1fdc2109468cafb256
 2019-10-15 15:47:55 +01:00
David Banks
975ba22848 z80: temporarily disable IORQ_inhibit 
The fixed unreliable IM2 interrupts on the Acorn Z80 Co Pro

Change-Id: Icd7e55a8a92391bd81218e9646bd243992677ce8
 2019-10-15 11:48:32 +01:00
David Banks
5845409961 z80: added a resume state 
This allows time for the paused instruction to be re-read

Without this, the Acorn Z80 Co Pro always seemed to be single
stepping NOP instructions.

Change-Id: I0bcb424293071efc0370b862854455a33f42faf2
 2019-10-15 11:46:50 +01:00
David Banks
50658b358e z80: generate RFSH_n cycles when stopped 
Change-Id: Ice9a78932bda74098cdde8d0a5571bc4bb784bb4
 2019-10-14 20:26:04 +01:00
David Banks
d9d552475a z80: rework wait state / break point logic 
Change-Id: I2b41c014165e8d753693d3ed7806087e85202a6e
 2019-10-14 17:33:32 +01:00
David Banks
4c746994cb z80: major rewrite of memory access state machine 
Change-Id: Icc5c7c991120ed155691c1e74517ac02f8ea2ada
 2019-10-14 13:35:13 +01:00
David Banks
2a79bc6819 6809: Added special command to inhibit IRQ/FIRQ/NMI 
Change-Id: I9b94fec5f464ecdb6bb0a4cd2a430401a182c929
 2019-10-01 15:21:28 +01:00
David Banks
c660ea87be Updated lx9_dave/ice6502 for active level shifter design 
Change-Id: Ib2e98050d02c9c1e3dd7c9a9b63eea118b95a540
 2019-09-20 15:34:44 +01:00
David Banks
a25a008ffc Updated lx9_dave/icez80 for active level shifter design 
Change-Id: I546e1afc0943443f444ae7f55783bac7e3379453
 2019-09-20 15:34:34 +01:00
David Banks
9c6960cc04 ICE-6809: Added glitch filtering to E 
Change-Id: Ide53c1776bc1eafc5fd746415a83a1f34f32b3a0
 2019-09-17 17:36:11 +01:00
David Banks
d86d51e020 ICE-6809: Adjusted the timings slightly 
Change-Id: I56ef5d22df2a329bba2853bcc7d39571492edb01
 2019-09-17 16:17:36 +01:00
David Banks
b7d6ca23b3 Revert accidental change to MC6809ECpuMon 
Change-Id: I7c5627b8a056bc1a784af1d8ed4cdc61862e7aa2
 2019-09-17 10:31:12 +01:00
David Banks
4b88d2aedd Kicad v2: complete routing 
Change-Id: Iae7b92ccb95a640158a3a9c1239e2491624e5da2
 2019-09-11 18:19:02 +01:00
David Banks
efdd41a239 6502: Added special command to inhibit IRQ/NMI 
Change-Id: I6ba8a1b3b92e5852382d35eee7a59b6a9d7e63e8
 2019-06-15 17:50:29 +01:00
David Banks
285697d175 6502: remove 40ns skew between phi1/phi2 outputs, as this erodes address hold time time from phi1 
Change-Id: Idd2b1418a18f6bb5cf2b553b6a069c42a0e64b97
 2018-12-21 17:25:37 +00:00
David Banks
1dcf9fa247 Updated lx9_dave/ice6502 with correct .ucf file and a new top-level design 
Change-Id: Ic67e37fb876322983a44c35e9db08b1b8371aea2
 2018-11-20 17:32:02 +00:00
David Banks
c1b0902f96 6502: Change din sampling from Phi0_b to Phi0_a 
Change-Id: Id1cf604cfa61dba7aae8da670a38e460a059e7bb
 2018-02-15 13:06:25 +00:00
David Banks
a4aa6df31a Added new top level generics to 6502 and 6809 designs 
Change-Id: I14d70471b97948c165210bebad88b60965531207
 2017-08-01 09:25:12 +01:00
David Banks
f2974d12df Swapped names of sw_interrupt_n and sw_reset_n (as they were wrong way around) 
Change-Id: I8819b4898be3beb36ec7f2ecb97f6797a7ab03b2
 2017-08-01 08:18:20 +01:00
David Banks
6415a81a40 On LX9 board, updated Tx=51 and Rx=55 
Change-Id: I5bcd032eab29ef93d36e8011fee673028042483f
 2017-07-29 19:55:27 +01:00
David Banks
7453cf4f9f LX9 support: massive refactor of the build system 
Change-Id: I75ff141a0d3b2c30a37d8f0e497f4f923e302b8b
 2017-07-26 14:59:20 +01:00
David Banks
78adf0030b LX9 support: corrected pin assignment in Z80CpuMonLX9Jason.ucf 
Change-Id: Iacf21daea16b68a3886eb68618016e76c8dc0998
 2017-07-26 09:45:01 +01:00
David Banks
79d890bcb9 LX9 support: in Z80CpuMon made the switch/led polarity configurable with generics 
Change-Id: I026bc8e56fe760b453edf970b33f6897a695d0d2
 2017-07-25 19:18:59 +01:00
David Banks
17acd5afdd LX9 support: updated Z80CpuMon ucf file - not final yet! 
Change-Id: I8dbf4f4012c3b43d8bdf07ca707d6d8b6ef8a1d1
 2017-07-25 19:17:55 +01:00
David Banks
0da1fa06bb LX9 support: work in progress 
Change-Id: I76249db20f992f92c5fc0454f698c40e578b5e54
 2017-07-25 17:34:19 +01:00
David Banks
f64641f99c Added build scripts for xc3s500e 
Change-Id: Icc7990c3ee257d1511fa478fd0d2b3575362eb29
 2016-10-24 14:24:18 +01:00
David Banks
6291faa4bd Updated to 0249 of the Z80 core by TobiFlex to fix issues with Spectrum Keyboard 
Change-Id: I2d92c541cdb7feaad84bd3d37ec125594b6b47a8
 2016-08-22 14:46:41 +01:00
David Banks
de6f722978 Adjusted Din sampling point ~40ns later so it co-incides with Phi2 
Change-Id: Ibdd44b83a139b6560efc886e95714ee91daef3dc
 2016-08-01 16:34:47 +01:00
David Banks
5410c32db3 Eliminated some warnings - changes mostly cosmetic 
Change-Id: Ic7a7a107f9343bac2b49512d92ee2ad8f13c8bb2
 2015-11-29 12:22:13 +00:00
David Banks
de16b3af1a Eliminated some warnings - changes mostly cosmetic 
Change-Id: I141b05c932d0736e689ff3a2cb2c90c24c850933
 2015-11-29 12:06:42 +00:00
David Banks
dd2ea9182b Fixed an incorrect module name 
Change-Id: I952135d7be04e332ca4cc5de7f6491bc0fedf5ec
 2015-11-28 17:32:08 +00:00
David Banks
e63266f720 Made AVR XPM and XDM more generic 
Change-Id: I0025d56d4ba7fa3e20d73f09ac51068ffd1859c5
 2015-11-28 17:22:23 +00:00
David Banks
cc6c062b4b Updated XDM2Kx8 to a more portable implementation 
Change-Id: I37cbe56b7b0113e24855eb1c0fcf7bbe006eefd3
 2015-11-28 11:19:27 +00:00
David Banks
a785d7e73f Refactored AtomFast6502 to use new MOS6502CpuMonCore - works in new Atom at 4MHz and with tube 
Change-Id: I73c769919e2634a4656a6edec2c5a1100bd70083
 2015-11-15 11:50:06 +00:00
David Banks
55c8889881 Updated reset output to avoid the use of a tristate signal in BusMonCore 
Change-Id: I3f49317689eb5808a5edb5fe5b10552d01a3db59
 2015-11-15 11:37:50 +00:00
David Banks
dc6165f826 Cosmetic tweaks to avoid warnings to Quartus 
Change-Id: I9f044a50d599dfcd3d3b7bd46f6e99e1ef3e92b6
 2015-11-14 13:36:15 +00:00
David Banks
568fd2906d Fixed AlanD core 65C02 bugs: D was being set in IRQ/BRK; sync was inferring a latch 
Change-Id: Ia7163e996c403a1caae04df10de3d7a42a91b45c
 2015-11-11 13:07:19 +00:00
David Banks
6aeb0c7b8a Refactor: 2nd stage - bug fixes 
Change-Id: Ic3bd520d0cc8b74f33068c53085229506d6968b2
 2015-10-31 18:31:41 +00:00
David Banks
99c5f951d1 Refactor: 2nd stage 
Change-Id: I6959bbc88082cc46930f907378d42adf1abf180e
 2015-10-31 14:29:14 +00:00
David Banks
b563a030ee Refactor: 1st stage 
Change-Id: I8889ff76ce802099fae67c147e110356adbd23ac
 2015-10-31 13:45:09 +00:00
David Banks
8a857ae45e Experimental AtomFast6502 adding bus mon function 
Change-Id: Ib5115d9e7b736c45bb46a0a063325a0173b6f823
 2015-10-31 11:46:40 +00:00
David Banks
eaf6f90ab6 ICE T65: Fixed the single stepping issue with AlanD's core (sync bug); increased CCLK rate to 25MHz 
Change-Id: I226a63a10b80973001f4b0ee825dcecadaece8cb
 2015-10-27 19:34:02 +00:00
David Banks
3c31e9e875 ICT T65: Fixed an issue the caused an immediate NMI on a Beeb Model B 
Change-Id: I5f0e00fc5e4f647c81778821282316e812215cb8
 2015-10-27 18:03:45 +00:00
David Banks
344e03185d Reworked the 6502 single stepping to hide the fact that register writes are pipelined 
Change-Id: I6d9157e3d9ade9af72e11d255b224cc7f210f376
 2015-10-26 16:44:25 +00:00
David Banks
9c4b9aa944 In ICE-T65 fixed the timing of ICE initiated read/write cycles to give them a whole cycle 
Change-Id: I6bfdf624ad4340a219096f231334ec8a9bbfc5af
 2015-10-26 12:54:17 +00:00
David Banks
92177196c0 Experimental AtomFast6502 with a different clocking arrangement 
Change-Id: Ic6f5275bc0982254e9b5508ec79f0365712657de
 2015-09-23 14:56:31 +01:00
David Banks
d3224a651d Fixed a bug with the I Flag being 0 rather than 1 following reset 
Change-Id: Ifc1573026e93944d33a756bd601200441ba20c1d
 2015-08-29 20:57:49 +01:00