Apple-2-HW/GR8RAM
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93 Commits

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Author SHA1 Message Date
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
Zane Kaminski
21f18c14db Recompiled just to be sure 2019-10-13 21:18:41 -04:00
Zane Kaminski
4d12361823 Switch library location, fixed datasheet fields 2019-10-13 02:04:29 -04:00
Zane Kaminski
1f0596291c Update GR8RAM-render.png 2019-10-13 02:04:13 -04:00
Zane Kaminski
4d8af3b074 Merge branch 'dev' of https://github.com/ZaneKaminski/GR8RAM into dev 2019-10-13 01:42:28 -04:00
Zane Kaminski
1bf5ce4be3 New schematic revision 2019-10-13 01:40:49 -04:00
Zane Kaminski
67399312b6 Register reset/initial values set syntax changed 2019-10-13 01:40:25 -04:00
Zane Kaminski
a45778b440 Put gerber files back 2019-10-13 01:39:20 -04:00
Zane Kaminski
cf16763591 24-bit counter, CAS fixed 2019-10-11 20:34:51 -04:00
Zane Kaminski
2382fdfda6 Made AddrH high bit variable with mode input 2019-09-07 21:16:23 -04:00
Zane Kaminski
b0a001aa58 Clarified assignments 2019-09-06 17:26:42 -04:00
Zane Kaminski
7ccb2b670e Merge branch 'dev' of https://github.com/ZaneKaminski/GR8RAM into dev 2019-09-05 13:50:40 -04:00
Zane Kaminski
6dabfca306 added some disassembly of RamFactor 2019-09-05 13:50:38 -04:00
Zane Kaminski
47a4c012d7 Pipelined addition 2019-09-04 21:45:56 -04:00
Zane Kaminski
106df31f52 Trying again with RamFactor firmware 2019-09-02 20:56:37 -04:00
Zane Kaminski
a73cbf10ef Clarifications and bugfixes, will try again 2019-09-02 01:42:07 -04:00
Zane Kaminski
5b230c0966 1MB CPLD design seems to work, fails Apple BIST 2019-09-01 21:18:44 -04:00
Zane Kaminski
e78807ce85 CPLD firmware compiles 2019-08-31 22:55:04 -04:00
Zane Kaminski
029354ce8e Submitted to JLCPCB 2019-07-30 17:11:31 -04:00
Zane Kaminski
fb35d7bd9b Release candidate PCB 2019-07-21 17:53:22 -04:00
Zane Kaminski
9ba21040f4 Rough schematic and board layout 2019-06-25 19:44:54 -04:00
Zane Kaminski
6158eec9bd Initial commit 2019-06-25 00:46:18 -04:00