Apple-2-HW/GR8RAM
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76eb5bdd9c
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Author SHA1 Message Date
Zane Kaminski
76eb5bdd9c Ignore Quartus stuff 2021-04-21 23:09:07 -04:00
Zane Kaminski
5437b524cc Register Apple address bus on PHI0 rising edge 2021-04-21 20:06:56 -04:00
Zane Kaminski
edf6ae602e Change IOROMEN logic back to synchronous reset 2021-04-21 09:21:35 -04:00
Zane Kaminski
e2d63fc8ed Output read data on falling edge to get more hold time 2021-04-21 09:19:57 -04:00
Zane Kaminski
d2dbdc8193 Revert "Updated slew rate/current strength assignments" 
This reverts commit 780fe32807.
 2021-04-20 05:50:09 -04:00
Zane Kaminski
780fe32807 Updated slew rate/current strength assignments 2021-04-20 05:43:37 -04:00
Zane Kaminski
2ca22d3d54 Latch config DIP switches at boot 
Also rearranged GR8RAM.v
 2021-04-20 04:23:57 -04:00
Zane Kaminski
2f607d6d7c Works better? 2021-04-20 04:10:26 -04:00
Zane Kaminski
23e88303df Documentation update 2021-04-20 01:49:44 -04:00
Zane Kaminski
880d796035 Add "ZK, GF" to board 2021-04-20 01:47:09 -04:00
Zane Kaminski
795c582ca0 Fabbed 2021-04-19 05:43:21 -04:00
Zane Kaminski
f09d92f480 Sorta works 2021-04-19 02:57:51 -04:00
Zane Kaminski
ed0821b322 Added CKE back 2021-04-18 20:24:58 -04:00
Zane Kaminski
bfd262def7 Sorta works 2021-04-18 06:01:08 -04:00
Zane Kaminski
8e35f6fc16 Remove CKE 2021-04-18 03:59:56 -04:00
Zane Kaminski
4fd3d2ff3f Make apple boot 
Apple boots but SDRAM not working. Register R/W/increment works
 2021-04-18 03:54:45 -04:00
Zane Kaminski
a85863d0be Create FrontIsom.png 2021-04-12 04:27:58 -04:00
Zane Kaminski
32025498f8 Update RAM Map 2021-04-12 03:46:33 -04:00
Zane Kaminski
d8a5dc069d idk 2021-04-11 15:39:19 -04:00
Zane Kaminski
fc2e875ac2 Works? 2021-04-03 03:44:42 -04:00
Zane Kaminski
763861e444 ugh 2021-03-19 16:38:48 -04:00
Zane Kaminski
e4bfc93b1f before remove UFM 2021-03-19 14:23:33 -04:00
Zane Kaminski
a336f5969b hmm 2021-03-19 06:59:22 -04:00
Zane Kaminski
4defba0f50 better 2021-03-19 06:45:31 -04:00
Zane Kaminski
72851cefc5 ugh 2021-03-19 02:56:20 -04:00
Zane Kaminski
686fac229e idk 2021-03-15 13:40:59 -04:00
Zane Kaminski
fdbc92725a Remove old CPLD stuff 2021-03-15 13:40:41 -04:00
Zane Kaminski
0a649d68ac Fabbed 2021-02-17 19:29:24 -05:00
Zane Kaminski
e2a3901004 reset button detect 2020-10-25 05:22:14 -04:00
Zane Kaminski
312ef9354d Board done? 2020-10-07 23:32:57 -04:00
Zane Kaminski
13c6a59278 Sketch of verilog 2020-10-07 23:32:29 -04:00
Zane Kaminski
089fee98b8 Update .gitignore 2020-05-15 22:51:14 -04:00
Zane Kaminski
fbd98b8928 Update .gitignore 2020-05-15 18:49:20 -04:00
Zane Kaminski
0ad3b4640a Many changes 2020-03-10 18:54:44 -04:00
Zane Kaminski
ac8cf35610 Put FullIOEN back 2020-02-26 03:37:20 -05:00
Zane Kaminski
ef9b5852fb Added transfer counters 2020-02-26 03:34:33 -05:00
Zane Kaminski
fe0a092924 Added separate configuration section 2020-02-26 03:31:20 -05:00
Zane Kaminski
490fcfb8e7 Cleanup 2020-02-26 03:15:36 -05:00
Zane Kaminski
04be5a0257 Removed inhibit output 2020-02-26 03:14:33 -05:00
Zane Kaminski
92cde65a9d Moved REGEN and IOROMEN (no functional change) 2020-02-26 03:14:13 -05:00
Zane Kaminski
a4f29ea751 Removed SetWR and FullIOEN 2020-02-26 02:13:35 -05:00
Zane Kaminski
764b09ba6a Comments, no actual changes to CPLD verilog 2020-02-16 22:03:57 -05:00
Zane Kaminski
88a4169ab6 Fixed previous problem, working again 2020-02-16 00:11:12 -05:00
Zane Kaminski
c5f1e637ac Doesn't work but committing for posterity 2020-02-15 23:15:54 -05:00
Zane Kaminski
c7cd1bb11e Removed AVR-JTAG-10 connector footprint 2020-02-09 03:40:57 -05:00
Zane Kaminski
6e6813786d Merge branch 'dev' of https://github.com/ZaneKaminski/GR8RAM into dev 2020-01-26 15:15:07 -05:00
Zane Kaminski
a2eecf4475 Separated CSDBEN 2020-01-26 15:13:37 -05:00
Zane Kaminski
85e3eb627d Removed state counter reset 2019-12-21 01:46:05 -05:00
Zane Kaminski
3e06d30382 Fixed bugs in new PLD stuff 2019-10-20 22:41:24 -04:00
Zane Kaminski
79dd794f45 New PLD revision 
For write operations, register data is latched and CAS signal becomes in the middle of S6, 70ns before the end of PHI0. This gives more write data setup time, which may be needed on the Apple II with the 1 MHz 6502.
 2019-10-18 15:07:38 -04:00