ZX81plus38 simple to build ZX-81 clone: Revision history

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curprev 00:4200:42, 30 August 2022‎ Mahjongg talk contribs‎ 55,120 bytes +547‎ →‎Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
curprev 00:2300:23, 30 August 2022‎ Mahjongg talk contribs‎ 54,573 bytes +7‎ →‎Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB
curprev 00:2300:23, 30 August 2022‎ Mahjongg talk contribs‎ 54,566 bytes +74‎ →‎Sunday August 28, 2022 Started designing the ZX81+38 Keyboard PCB

curprev 16:0316:03, 22 August 2022‎ Mahjongg talk contribs‎ 52,067 bytes −103‎ →‎August 22, 2022 Tests reveal joystick logic not working
curprev 15:5915:59, 22 August 2022‎ Mahjongg talk contribs‎ 52,170 bytes +70‎ →‎August 22, 2022 Tests reveal joystick logic not working
curprev 15:5115:51, 22 August 2022‎ Mahjongg talk contribs‎ 52,100 bytes +1,686‎ →‎August 10, 2022 its working, but have yet to connect the keyboard

curprev 23:5323:53, 9 August 2022‎ Mahjongg talk contribs‎ 50,414 bytes +289‎ →‎August 10, 2022 its working, but have yet to connect the keyboard
curprev 23:4123:41, 9 August 2022‎ Mahjongg talk contribs‎ 50,125 bytes +629‎ →‎August 3, 2022 bad luck, I'm missing one HC IC

curprev 22:5722:57, 2 August 2022‎ Mahjongg talk contribs‎ m 49,496 bytes −1‎ →‎August 3, 2022 bad luck, I'm missing one HC IC
curprev 22:5622:56, 2 August 2022‎ Mahjongg talk contribs‎ 49,497 bytes +79‎ →‎August 3, 2022 bad luck, Iḿ missing one IC
curprev 22:5222:52, 2 August 2022‎ Mahjongg talk contribs‎ 49,418 bytes +426‎ →‎August 3, 2022 bad luck, Iḿ missing one IC
curprev 22:4222:42, 2 August 2022‎ Mahjongg talk contribs‎ 48,992 bytes +859‎ →‎July 26, 2022 Updated all revision 1.8 files on GitHub

curprev 18:1318:13, 26 July 2022‎ Mahjongg talk contribs‎ 48,133 bytes +123‎ →‎July 26, 2022 Updated all revision 1.8 files on GitHub
curprev 14:0014:00, 26 July 2022‎ Mahjongg talk contribs‎ 48,010 bytes +143‎ →‎July 26, 2022 Updated all revision 1.8 files on GitHub
curprev 13:5613:56, 26 July 2022‎ Mahjongg talk contribs‎ 47,867 bytes +358‎ →‎July 23 2022 JP1 has become unchangeable in rev 1.7

curprev 20:1420:14, 23 July 2022‎ Mahjongg talk contribs‎ 47,509 bytes +412‎ →‎July 19, That wasn't it

curprev 14:3714:37, 21 July 2022‎ Mahjongg talk contribs‎ m 47,097 bytes +20‎ →‎July 10, 2022 updated rev 1.7 schematic, Gerber/drill and placement drawing
curprev 14:3614:36, 21 July 2022‎ Mahjongg talk contribs‎ 47,077 bytes +1,019‎ →‎July 15, I have an idea why the first test didn't work

curprev 12:4712:47, 15 July 2022‎ Mahjongg talk contribs‎ m 46,058 bytes +4‎ →‎July 15, I have an idea why the first test didn't work
curprev 12:4712:47, 15 July 2022‎ Mahjongg talk contribs‎ m 46,054 bytes +2‎ →‎July 15, Have an idea why the first test didn't work
curprev 12:4612:46, 15 July 2022‎ Mahjongg talk contribs‎ 46,052 bytes +543‎ →‎July 14, 2022 Updated the layout with correction of NPTH holes and USB connector positions

curprev 00:0700:07, 14 July 2022‎ Mahjongg talk contribs‎ m 45,509 bytes +15‎ →‎July 14, 2022 Updated the layout with correction of NPTH holes and USB connector positions
curprev 00:0600:06, 14 July 2022‎ Mahjongg talk contribs‎ 45,494 bytes +2,294‎ →‎July 10, 2022 updated rev 1.7 schematic, Gerber/drill and placement drawing

curprev 15:3215:32, 10 July 2022‎ Mahjongg talk contribs‎ 43,200 bytes +74‎ →‎July 10, 2022 updated rev 1.7 schematic, Gerber/drill and placement drawing
curprev 15:2715:27, 10 July 2022‎ Mahjongg talk contribs‎ 43,126 bytes +53‎ →‎July 10, 2022 updated rev 1.7 schematic, Gerber/drill and placement drawing
curprev 15:1815:18, 10 July 2022‎ Mahjongg talk contribs‎ 43,073 bytes +150‎ →‎July 6, 2022 I made an observation while building up my copy of the ZX81+38 that shook me

curprev 18:3418:34, 6 July 2022‎ Mahjongg talk contribs‎ m 42,923 bytes +36‎ →‎July 6, 2022 I made an observation while building up my copy of the ZX81+38 that shook me
curprev 17:4217:42, 6 July 2022‎ Mahjongg talk contribs‎ 42,887 bytes +103‎ →‎July 6, 2022 I made an observation while building up my copy of the ZX81+38 that shook me
curprev 17:2717:27, 6 July 2022‎ Mahjongg talk contribs‎ 42,784 bytes +3,466‎ →‎June 29, 2022 The crystal oscillator is working!

curprev 00:4800:48, 29 June 2022‎ Mahjongg talk contribs‎ 39,318 bytes 0‎ →‎June 29, 2022 The crystal oscillator is working!

curprev 17:0617:06, 23 June 2022‎ Mahjongg talk contribs‎ 39,002 bytes +638‎ →‎juni 22 2022, got a free Xtal and 74HCU04, Finished Revision 1.7

curprev 15:2815:28, 8 June 2022‎ Mahjongg talk contribs‎ m 35,948 bytes −1‎ →‎May 24, 2020 slowly making progress
curprev 15:2715:27, 8 June 2022‎ Mahjongg talk contribs‎ 35,949 bytes +568‎ →‎juni 1 2022, crystal oscilator is working!

curprev 19:4819:48, 3 May 2022‎ Mahjongg talk contribs‎ 28,991 bytes −1‎ →‎May 3, 2022 After more than two year of covid related delay I finally built my own copy
curprev 19:4719:47, 3 May 2022‎ Mahjongg talk contribs‎ 28,992 bytes +310‎ →‎May 3, 2022 After more than two year of covid related delay I finally built my own copy
curprev 19:2719:27, 3 May 2022‎ Mahjongg talk contribs‎ 28,682 bytes +340‎ →‎April 17, 2022 I Produced a component placement diagram for rev 1.6

curprev 17:2217:22, 18 April 2022‎ Mahjongg talk contribs‎ m 28,342 bytes +1‎ →‎April 17, 2022 I Produced a component placement diagram for rev 1.6
curprev 17:1617:16, 18 April 2022‎ Mahjongg talk contribs‎ 28,341 bytes +41‎ →‎April 17, 2022 I Produced a component placement diagram for rev 1.6
curprev 17:1317:13, 18 April 2022‎ Mahjongg talk contribs‎ m 28,300 bytes +4‎ →‎April 17, 2022 Produced component placement diagram for rev 1.6

curprev 21:5421:54, 17 April 2022‎ Mahjongg talk contribs‎ m 28,296 bytes +2‎ →‎April 17, 2022 Produced component placement diagram for rev 1.6
curprev 21:4921:49, 17 April 2022‎ Mahjongg talk contribs‎ 28,294 bytes +743‎ →‎April 17, 2022 Produced component placement diagram for rev 1.6
curprev 21:4121:41, 17 April 2022‎ Mahjongg talk contribs‎ 27,551 bytes +71‎ →‎26 november 2020, I found a suitable soldering iron at home

curprev 14:4314:43, 26 April 2021‎ Mahjongg talk contribs‎ 27,480 bytes +18‎ →‎26 november 2020, I found a suitable soldering iron at home
curprev 14:4314:43, 26 April 2021‎ Mahjongg talk contribs‎ 27,462 bytes +305‎ →‎26 november 2020, I found a suitable soldering iron at home
curprev 14:3914:39, 26 April 2021‎ Mahjongg talk contribs‎ 27,157 bytes +36‎ →‎26 november 2020, I found a suitable soldering iron at home

curprev 16:0116:01, 21 April 2021‎ Mahjongg talk contribs‎ 27,121 bytes +120‎ →‎26 november 2020, I found a suitable soldering iron at home
curprev 15:5915:59, 21 April 2021‎ Mahjongg talk contribs‎ 27,001 bytes +78‎ →‎26 november 2020, I found a suitable soldering iron at home
curprev 15:5815:58, 21 April 2021‎ Mahjongg talk contribs‎ 26,923 bytes +679‎ →‎26 november 2020, I found a suitable soldering iron at home
curprev 15:4615:46, 21 April 2021‎ Mahjongg talk contribs‎ m 26,244 bytes +8‎ No edit summary

curprev 02:3802:38, 26 February 2021‎ Mahjongg talk contribs‎ 26,236 bytes +106‎ →‎26 november 2020, I found a suitable soldering iron at home

curprev 23:4023:40, 25 November 2020‎ Mahjongg talk contribs‎ 26,130 bytes +104‎ →‎26 november 2020, I found a suitable soldering iron at home
curprev 23:3423:34, 25 November 2020‎ Mahjongg talk contribs‎ m 26,026 bytes −4‎ →‎26 november 2020, I found a suitable soldering iron at home
curprev 23:3223:32, 25 November 2020‎ Mahjongg talk contribs‎ 26,030 bytes +977‎ →‎11 november 2020, I received a rev 1.6 PCB, and parts

curprev 23:2123:21, 31 October 2020‎ Mahjongg talk contribs‎ 24,355 bytes +155‎ →‎A new found error makes Revision 1,6 necessary

curprev 12:5812:58, 20 October 2020‎ Mahjongg talk contribs‎ 24,200 bytes +680‎ →‎A new found error makes Revision 1,6 necessary

curprev 16:5316:53, 17 October 2020‎ Mahjongg talk contribs‎ m 22,415 bytes 0‎ →‎Layout ZX81+38 rev 1,8 finished and checked

curprev 00:4900:49, 13 October 2020‎ Mahjongg talk contribs‎ 22,168 bytes −7‎ →‎Revision 1.5 with various corrections should now be working
curprev 00:4800:48, 13 October 2020‎ Mahjongg talk contribs‎ m 22,175 bytes 0‎ →‎Revision 1.5 with various corrections should now be working
curprev 00:4700:47, 13 October 2020‎ Mahjongg talk contribs‎ 22,175 bytes +7‎ →‎Revision 1.5 with various corrections is now working

curprev 00:1000:10, 10 October 2020‎ Mahjongg talk contribs‎ m 22,168 bytes +7‎ →‎Revision 1.5 with various corrections is now working
curprev 00:0900:09, 10 October 2020‎ Mahjongg talk contribs‎ 22,161 bytes +111‎ →‎Revision 1.5 with various corrections is now working

curprev 00:3200:32, 6 October 2020‎ Mahjongg talk contribs‎ 19,605 bytes +112‎ →‎Various people are building mij ZX-81plus38, and offer a great help debugging it
curprev 00:3000:30, 6 October 2020‎ Mahjongg talk contribs‎ 19,493 bytes +659‎ →‎I managed to work from home

curprev 15:2315:23, 14 September 2020‎ Mahjongg talk contribs‎ 18,834 bytes +33‎ →‎I managed to work from home

curprev 23:5923:59, 11 September 2020‎ Mahjongg talk contribs‎ 18,801 bytes +53‎ →‎I managed to work from home
curprev 23:5823:58, 11 September 2020‎ Mahjongg talk contribs‎ 18,748 bytes +29‎ →‎I managed to work from home
curprev 23:4323:43, 11 September 2020‎ Mahjongg talk contribs‎ 18,719 bytes +136‎ →‎I managed to work from home
curprev 23:3423:34, 11 September 2020‎ Mahjongg talk contribs‎ 18,583 bytes +536‎ →‎Due to the COVID-19 crisis progress has temporarily halted

curprev 03:3203:32, 3 September 2020‎ Mahjongg talk contribs‎ 18,047 bytes +56‎ →‎April 10, ZX-81plus38 PCB is finished
curprev 03:3003:30, 3 September 2020‎ Mahjongg talk contribs‎ 17,991 bytes +107‎ →‎April 10, ZX-81plus38 PCB is finished

curprev 15:3715:37, 30 August 2020‎ Mahjongg talk contribs‎ m 17,884 bytes +34‎ →‎Due to the COVID-19 crisis progress has temporarily halted
curprev 14:2814:28, 30 August 2020‎ Mahjongg talk contribs‎ 17,850 bytes +35‎ →‎April 10, ZX-81plus38 PCB is finished
curprev 14:1014:10, 30 August 2020‎ Mahjongg talk contribs‎ m 17,815 bytes +3‎ →‎Due to the COVID-19 crisis progress has temporarily halted

curprev 17:4917:49, 21 July 2020‎ Mahjongg talk contribs‎ 17,812 bytes +20‎ →‎Due to the COVID-19 crisis progress has halted
curprev 17:4917:49, 21 July 2020‎ Mahjongg talk contribs‎ m 17,792 bytes +1‎ →‎Due to the COVID-19 crisis progress has halted
curprev 17:4817:48, 21 July 2020‎ Mahjongg talk contribs‎ 17,791 bytes +370‎ →‎April 10, ZX-81plus38 PCB is finished
curprev 17:4317:43, 21 July 2020‎ Mahjongg talk contribs‎ 17,421 bytes +18‎ →‎September 18, 2019 I started the design

curprev 21:2821:28, 23 April 2020‎ Mahjongg talk contribs‎ m 17,403 bytes +2‎ →‎April 10, ZX-81plus38 PCB is finished

curprev 12:4212:42, 10 April 2020‎ Mahjongg talk contribs‎ 17,401 bytes +4‎ →‎March 26, ZX-81plus38 is finished
curprev 12:4112:41, 10 April 2020‎ Mahjongg talk contribs‎ 17,397 bytes −1‎ No edit summary

curprev 13:3013:30, 11 March 2020‎ Mahjongg talk contribs‎ 14,706 bytes +11‎ No edit summary
curprev 10:4310:43, 11 March 2020‎ Mahjongg talk contribs‎ 14,695 bytes −4‎ No edit summary
curprev 10:4110:41, 11 March 2020‎ Mahjongg talk contribs‎ 14,699 bytes +84‎ →‎March 11, 2020 Added soldermask, and silkscreen
curprev 10:3910:39, 11 March 2020‎ Mahjongg talk contribs‎ 14,615 bytes −13‎ →‎March 11, 2020 Added soldermask, and silkscreen

curprev 23:5323:53, 10 March 2020‎ Mahjongg talk contribs‎ 14,628 bytes +67‎ →‎March 11, 2020 Added soldermask, and silkscreen
curprev 23:5223:52, 10 March 2020‎ Mahjongg talk contribs‎ 14,561 bytes +16‎ →‎March 11, 2020 Added soldermask, and silkscreen
curprev 23:5123:51, 10 March 2020‎ Mahjongg talk contribs‎ 14,545 bytes +309‎ →‎March 4, 2020 layout finished

curprev 15:1715:17, 6 March 2020‎ Mahjongg talk contribs‎ 14,236 bytes +270‎ →‎March 4, 2020 layout finished

curprev 10:2210:22, 4 March 2020‎ Mahjongg talk contribs‎ 13,966 bytes +181‎ →‎March 4, 2020 layout finished
curprev 10:2010:20, 4 March 2020‎ Mahjongg talk contribs‎ 13,785 bytes +208‎ →‎March 4, 2020 layout finished
curprev 00:3000:30, 4 March 2020‎ Mahjongg talk contribs‎ 13,577 bytes +42‎ →‎March 4, 2020 layout finished
curprev 00:2500:25, 4 March 2020‎ Mahjongg talk contribs‎ 13,535 bytes +152‎ →‎February 26, 2020

curprev 10:4610:46, 26 February 2020‎ Mahjongg talk contribs‎ m 13,383 bytes +1‎ →‎January 14, 2020, some progress

curprev 23:2523:25, 25 February 2020‎ Mahjongg talk contribs‎ 13,382 bytes +370‎ →‎February 19, 2020

curprev 23:2623:26, 11 February 2020‎ Mahjongg talk contribs‎ 12,555 bytes +7‎ →‎February 12, 2020
curprev 23:2523:25, 11 February 2020‎ Mahjongg talk contribs‎ 12,548 bytes +368‎ →‎February 12, 2020
curprev 23:1723:17, 11 February 2020‎ Mahjongg talk contribs‎ 12,180 bytes +74‎ →‎January 28, 2020

curprev 23:0423:04, 28 January 2020‎ Mahjongg talk contribs‎ 12,106 bytes +73‎ →‎January 22, 2020 more progress

curprev 23:0323:03, 21 January 2020‎ Mahjongg talk contribs‎ 12,033 bytes +90‎ →‎January 14, 2020, some progress

curprev 22:2322:23, 14 January 2020‎ Mahjongg talk contribs‎ 11,943 bytes +152‎ →‎December 10, 2019, partially routed

curprev 22:5422:54, 10 December 2019‎ Mahjongg talk contribs‎ 11,791 bytes +5‎ →‎December 10, 2019, partially routed
curprev 22:4122:41, 10 December 2019‎ Mahjongg talk contribs‎ 11,786 bytes +15‎ →‎December 3, 2019, partially routed

curprev 22:5022:50, 3 December 2019‎ Mahjongg talk contribs‎ 11,771 bytes +1‎ →‎October 30, 2016 First component placement =
curprev 22:4822:48, 3 December 2019‎ Mahjongg talk contribs‎ 11,770 bytes +3‎ →‎December 3, 2019, partially routed
curprev 22:4522:45, 3 December 2019‎ Mahjongg talk contribs‎ 11,767 bytes +1‎ →‎December 3, 2019, partially routed
curprev 22:4522:45, 3 December 2019‎ Mahjongg talk contribs‎ 11,766 bytes +74‎ →‎November 20, 2019 finished placement, did some power routing

curprev 16:1216:12, 20 November 2019‎ Mahjongg talk contribs‎ m 11,692 bytes +4‎ →‎November 20, 2019 finished placement, did some power routing
curprev 16:1116:11, 20 November 2019‎ Mahjongg talk contribs‎ 11,688 bytes +81‎ →‎November 20, 2019 finished placement, did some power routing
curprev 02:0002:00, 20 November 2019‎ Mahjongg talk contribs‎ 11,607 bytes +1‎ →‎November 13, 2019 Did a lot of placement optimization
curprev 01:1701:17, 20 November 2019‎ Mahjongg talk contribs‎ 11,606 bytes +283‎ →‎November 13, 2019 Did a lot of placement optimization

curprev 17:1417:14, 19 November 2019‎ Mahjongg talk contribs‎ 11,323 bytes +140‎ →‎November 13, 2019 Did a lot of placement optimization

curprev 15:1115:11, 11 November 2019‎ Mahjongg talk contribs‎ 10,961 bytes +1‎ →‎October 20, 2016 rev 1.3 supports 16K ROM's
curprev 15:1015:10, 11 November 2019‎ Mahjongg talk contribs‎ 10,960 bytes −1‎ →‎October 20, 2016 rev 1.3 supports 16K ROM's
curprev 15:0915:09, 11 November 2019‎ Mahjongg talk contribs‎ 10,961 bytes +47‎ →‎October 20, 2016 rev 1.3 supports 16K ROM's
curprev 15:0915:09, 11 November 2019‎ Mahjongg talk contribs‎ 10,914 bytes −47‎ →‎October 15, 2019, finished schematic rev1.2 (functionally complete)

curprev 23:4123:41, 5 November 2019‎ Mahjongg talk contribs‎ 10,961 bytes +78‎ →‎November 6, 2016 re-shaped the DIP pads to accommodate routing two wires between pads
curprev 23:3923:39, 5 November 2019‎ Mahjongg talk contribs‎ 10,883 bytes +662‎ →‎October 30, 2016 First component placement =

curprev 00:0100:01, 30 October 2019‎ Mahjongg talk contribs‎ 10,221 bytes +64‎ →‎October 30, 2016 First component placement =

curprev 23:4623:46, 19 October 2019‎ Mahjongg talk contribs‎ 9,860 bytes +66‎ →‎October 20, 2016 rev 1.3 supports 16K ROM's
curprev 23:4323:43, 19 October 2019‎ Mahjongg talk contribs‎ 9,794 bytes +300‎ →‎October 15, 2019, finished schematic rev1.2 (functionally complete)

curprev 01:4901:49, 13 October 2019‎ Mahjongg talk contribs‎ 9,466 bytes +687‎ →‎October 13, 2019, schematic rev1.1 (some errors fixed, added ZX81 ROM support)
curprev 00:1500:15, 13 October 2019‎ Mahjongg talk contribs‎ 8,779 bytes +322‎ →‎October 13, 2019, schematic rev1.1 (some errors fixed, added ZX81 ROM support)
curprev 00:0000:00, 13 October 2019‎ Mahjongg talk contribs‎ 8,457 bytes +152‎ →‎October 13, 2019, schematic rev1.1 (some errors fixed, added ZX81 ROM support)

curprev 23:5523:55, 12 October 2019‎ Mahjongg talk contribs‎ 8,305 bytes +41‎ →‎October 13, 2019, schematic rev1.1 (some errors fixed, added ZX81 ROM support)
curprev 23:4723:47, 12 October 2019‎ Mahjongg talk contribs‎ 8,264 bytes +40‎ →‎October 13, 2019, schematic rev1.1 (errors repaired, ZX81 ROM support)
curprev 23:4423:44, 12 October 2019‎ Mahjongg talk contribs‎ 8,224 bytes +1,297‎ →‎October 9, schematic rev1.0 finished

curprev 13:1013:10, 9 October 2019‎ Mahjongg talk contribs‎ 6,927 bytes +4‎ No edit summary

curprev 22:4722:47, 8 October 2019‎ Mahjongg talk contribs‎ 6,923 bytes +111‎ →‎October 9, schematic rev1.0 finished
curprev 22:4622:46, 8 October 2019‎ Mahjongg talk contribs‎ 6,812 bytes +112‎ →‎October 9, schematic rev1.0 finished
curprev 22:4422:44, 8 October 2019‎ Mahjongg talk contribs‎ 6,700 bytes +81‎ →‎October 9, schematic rev1.0 finished
curprev 22:2022:20, 8 October 2019‎ Mahjongg talk contribs‎ 6,619 bytes +102‎ →‎October 6, schematic mostly finished

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