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f471e04244
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Author SHA1 Message Date
Zane Kaminski
f471e04244 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
a8eb7940fe Recompiled just to be sure 2019-10-13 21:18:41 -04:00
Zane Kaminski
d80b9dc727 Switch library location, fixed datasheet fields 2019-10-13 02:04:29 -04:00
Zane Kaminski
3de72a352c Update GR8RAM-render.png 2019-10-13 02:04:13 -04:00
Zane Kaminski
ebaef9824f Merge branch 'dev' of https://github.com/ZaneKaminski/GR8RAM into dev 2019-10-13 01:42:28 -04:00
Zane Kaminski
3b0ca6584a New schematic revision 2019-10-13 01:40:49 -04:00
Zane Kaminski
94219dd018 Removed old driver disassemblies 2019-10-13 01:40:42 -04:00
Zane Kaminski
4ef5acf2d3 Register reset/initial values set syntax changed 2019-10-13 01:40:25 -04:00
Zane Kaminski
6c4d1c2510 Put gerber files back 2019-10-13 01:39:20 -04:00
Zane Kaminski
7f581f6ba0 24-bit counter, CAS fixed 2019-10-11 20:34:51 -04:00
Zane Kaminski
66fc09b402 Made AddrH high bit variable with mode input 2019-09-07 21:16:23 -04:00
Zane Kaminski
7ea556dd34 Clarified assignments 2019-09-06 17:26:42 -04:00
Zane Kaminski
a16ba8b3bf Merge branch 'dev' of https://github.com/ZaneKaminski/GR8RAM into dev 2019-09-05 13:50:40 -04:00
Zane Kaminski
5cc0e2fe26 added some disassembly of RamFactor 2019-09-05 13:50:38 -04:00
Zane Kaminski
f52c6e4781 Pipelined addition 2019-09-04 21:45:56 -04:00
Zane Kaminski
a87ee9c819 Trying again with RamFactor firmware 2019-09-02 20:56:37 -04:00
Zane Kaminski
215f5ca2c6 Clarifications and bugfixes, will try again 2019-09-02 01:42:07 -04:00
Zane Kaminski
6b2378f99a 1MB CPLD design seems to work, fails Apple BIST 2019-09-01 21:18:44 -04:00
Zane Kaminski
3bc9a91b08 Create GR8RAM.bin 2019-09-01 17:45:53 -04:00
Zane Kaminski
396cc3c03c CPLD firmware compiles 2019-08-31 22:55:04 -04:00
Zane Kaminski
dac5bdb451 Submitted to JLCPCB 2019-07-30 17:11:31 -04:00
Zane Kaminski
62ff891412 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