ZX81plus38 simple to build ZX-81 clone: Revision history

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curprev 13:1913:19, 15 November 2023‎ Mahjongg talk contribs‎ 72,295 bytes +147‎ →‎I'm designing my own mechanical keyboard for the ZX81+38

curprev 03:4003:40, 13 November 2023‎ Mahjongg talk contribs‎ 72,148 bytes +254‎ →‎Someone requested a TS1000 version

curprev 20:4820:48, 24 October 2023‎ Mahjongg talk contribs‎ 71,894 bytes +400‎ →‎I'm designing my own mechanical keyboard for the ZX81+38

curprev 00:2800:28, 7 July 2023‎ Mahjongg talk contribs‎ 71,494 bytes +55‎ →‎I'm designing my own mechanical keyboard for the ZX81+38
curprev 00:2500:25, 7 July 2023‎ Mahjongg talk contribs‎ 71,439 bytes +216‎ →‎I'm designing my own mechanical keyboard for the ZX81+38

curprev 23:5823:58, 22 June 2023‎ Mahjongg talk contribs‎ 70,279 bytes +26‎ →‎did a small test to see if my ZX-81 has 16K of RAM
curprev 23:5023:50, 22 June 2023‎ Mahjongg talk contribs‎ 70,253 bytes +212‎ →‎moved a few screw-holes, for rev 1.10

curprev 15:5015:50, 14 June 2023‎ Mahjongg talk contribs‎ 70,041 bytes +200‎ →‎omoved a few screwholes!
curprev 15:4715:47, 14 June 2023‎ Mahjongg talk contribs‎ 69,841 bytes +1‎ →‎one screwhole must move!

curprev 00:1000:10, 29 May 2023‎ Mahjongg talk contribs‎ 69,840 bytes +357‎ →‎I also tested the joystick

curprev 00:3500:35, 22 March 2023‎ Mahjongg talk contribs‎ 66,573 bytes +40‎ →‎22, march 2023 picture of my keyboard solution
curprev 00:3400:34, 22 March 2023‎ Mahjongg talk contribs‎ 66,533 bytes −13‎ →‎22, march 2023 picture of my keyboard solution
curprev 00:2400:24, 22 March 2023‎ Mahjongg talk contribs‎ 66,546 bytes +50‎ →‎22, march 2023 picture of my keyboard solution
curprev 00:1500:15, 22 March 2023‎ Mahjongg talk contribs‎ 66,496 bytes +54‎ →‎Tuesday 27, December 2022

curprev 14:0614:06, 10 March 2023‎ Mahjongg talk contribs‎ 66,442 bytes −2‎ →‎Wednesday september 28, 2022 testing cassette loading

curprev 18:3818:38, 27 December 2022‎ Mahjongg talk contribs‎ 66,444 bytes +21‎ →‎Tuesday 27, December 2022
curprev 18:3718:37, 27 December 2022‎ Mahjongg talk contribs‎ m 66,423 bytes +1‎ →‎Tuesday 27, December 2022 =
curprev 18:3618:36, 27 December 2022‎ Mahjongg talk contribs‎ 66,422 bytes +1,301‎ →‎Monday december 12, 2022 received the PCB's

curprev 15:2115:21, 16 December 2022‎ Mahjongg talk contribs‎ 65,121 bytes +1,082‎ →‎Monday december 12, 2022 received the PCB's
curprev 15:0915:09, 16 December 2022‎ Mahjongg talk contribs‎ m 64,039 bytes 0‎ →‎Monday december 12, 2022 received the PCB's
curprev 15:0915:09, 16 December 2022‎ Mahjongg talk contribs‎ 64,039 bytes +511‎ →‎Friday 2 December 2022, I ordered ten revision 1.9 PCB's of the ZX81+38, plus ten keyboard PCB's, and five TZXDuino pico PCB's from PCBWay

curprev 16:3016:30, 2 December 2022‎ Mahjongg talk contribs‎ 63,528 bytes +339‎ →‎Wednesday september 28, 2022 testing cassette loading

curprev 00:0600:06, 28 September 2022‎ Mahjongg talk contribs‎ 63,189 bytes +1,174‎ →‎wensday september 14, 2022 found error in cassete input and output

curprev 01:2901:29, 21 September 2022‎ Mahjongg talk contribs‎ 62,015 bytes +244‎ →‎wensday september 14, 2022 found error in cassete input and output
curprev 01:2501:25, 21 September 2022‎ Mahjongg talk contribs‎ 61,771 bytes +728‎ →‎wensday september 14, 2022 found error in cassete input and output
curprev 01:1701:17, 21 September 2022‎ Mahjongg talk contribs‎ m 61,043 bytes +1‎ →‎wensday september 14, 2022 found error in cassete input and output

curprev 13:5813:58, 15 September 2022‎ Mahjongg talk contribs‎ 61,440 bytes +17‎ →‎August 23, 2022 Repaired joystick logic in revision 1.9

curprev 23:5423:54, 13 September 2022‎ Mahjongg talk contribs‎ 59,828 bytes +563‎ →‎Saturday september 10, 2022 Corrected error in silkscreen text of keyboard

curprev 15:0115:01, 10 September 2022‎ Mahjongg talk contribs‎ 59,265 bytes +268‎ →‎Thursday september 8, 2022 released keyboard PCB design files to GitHub.

curprev 04:1704:17, 6 September 2022‎ Mahjongg talk contribs‎ 57,483 bytes +44‎ →‎Tuesday september 6, 2022 found error is keyboard
curprev 03:4603:46, 6 September 2022‎ Mahjongg talk contribs‎ 57,439 bytes +176‎ →‎Tuesday september 6, 2022 found error is keyboard
curprev 03:4403:44, 6 September 2022‎ Mahjongg talk contribs‎ 57,263 bytes +864‎ →‎Tuesday August 31, 2022 keyboard works!

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

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