Uploads by Mahjongg
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This special page shows all uploaded files.
| Date | Name | Thumbnail | Size | Description | Versions |
|---|---|---|---|---|---|
| 21:29, 22 June 2022 | ZX81+38 rev 1.7 component placement.png (file) |  |
49 KB | Updated version with U21 = 74HC04 ,rotated J3 and R21 = 330R | 1 |
| 20:26, 22 June 2022 | ZX81plus38 Rev 1,7-resized.png (file) |  |
761 KB | 1 | |
| 19:35, 22 June 2022 | ZX81plus38 Rev 1,7-1.png (file) | Error creating thumbnail: File with dimensions greater than 12.5 MP |
812 KB | rev 1.7 as PNG picture | 1 |
| 19:27, 22 June 2022 | ZX81plus38 Rev 1,7.pdf (file) |  |
319 KB | schematic revision 1.7 with various updates, see bottom right block of schematic | 1 |
| 13:18, 4 May 2022 | Rom pinouts for ZX81+38 resized.png (file) |  |
78 KB | drawing explaining three kinds of ROM's that can be fit into the ZX81+38 ROM socket, the three options are: Original ZX-81 ROM a 27C256 OTP (default choice) a 28C256 if you expect you will need to change to contents of the ROM regularly reference the... | 1 |
| 19:33, 3 May 2022 | Opgebouwd.JPG (file) |  |
770 KB | Zonder geplaatste IC's | 1 |
| 21:36, 17 April 2022 | ZX81+38 rev 1.6 component placement.png (file) |  |
31 KB | component placement drawing for ZX81+38 rev 1.6 | 1 |
| 19:27, 30 March 2022 | PSG sound expansion BOM.pdf (file) | |
48 KB | 1 | |
| 18:29, 28 March 2022 | Layout sound expansion rev2.2 component overview.png (file) |  |
29 KB | updated component overview | 1 |
| 17:28, 28 March 2022 | ZON compatiible PSG with SD-Card interface rev 2.2.PNG (file) |  |
90 KB | 1 | |
| 05:37, 28 March 2022 | PSG with sd-card interface for ZX81plus35 REV 2.2.png (file) |  |
288 KB | as png picture | 1 |
| 02:50, 23 March 2022 | PSG with sd-card interface for ZX81plus35 REV 2.2.pdf (file) | |
29 KB | New version with corrected 74HCT02 but also with the changes to the SD-CARD interface that makes it working | 1 |
| 17:32, 21 March 2022 | ZX81+35 REV 4.2 layout preview.PDF (file) | |
210 KB | Top layer plus silk screen preview of ZX81+35 Rev4.2 | 1 |
| 17:07, 21 March 2022 | ZX81+35 REV 4.2. schematic color.pdf (file) | |
73 KB | Version suitable for PSG with SD-Card interface, with 16K ROM support (default) and with A13 & A14 corrected, swapped, on expansion port, also now with 0 (CPU) clock instead of 3.5MHz on expansion port | 1 |
| 17:43, 15 March 2022 | The hardware thomas used, not the various patches on the PSG board.jpg (file) |  |
183 KB | Thomas worked on my PSG board for the ZX-81+35 and used some patches, and his firmware in (expanded) ROM to get a SD-card interface working. | 1 |
| 17:41, 15 March 2022 | The OS menu, showing files you can download using the SD-card interface.jpeg (file) |  |
178 KB | A list of files (.ROM files) you can choose using the firmware with thomas sd-card interface software | 1 |
| 17:38, 15 March 2022 | Game loaded on zx-81+35 using the sd-card interface.jpeg (file) |  |
164 KB | thomas used his PSG clone board to load a game file | 1 |
| 02:42, 9 March 2022 | PanGalaksija component placing rev1.0 Preliminary.png (file) |  |
100 KB | picture of preliminary component placement of PanGalaksija rev 1.0 | 1 |
| 02:32, 9 March 2022 | PanGalaksija-component placement rev 1.0.pdf (file) | |
66 KB | component placement (quiet picture, so no pads) | 1 |
| 02:17, 9 March 2022 | PanGalaksija schematic Keys rev1.0.png (file) |  |
229 KB | This is the keyboard section of PanGalaksija revision 1.0 | 1 |
| 02:13, 9 March 2022 | PanGalaksija schematic main rev1.0.png (file) |  |
493 KB | first full schematic of PanGalaksija main-section revision 1.0. picture version of the .PDF | 1 |
| 02:03, 9 March 2022 | PanGalaksija schematic rev1.0.pdf (file) | |
286 KB | first full schematic main & keyboard | 1 |
| 14:25, 17 February 2022 | Keyboard PanGalaksija preview.png (file) |  |
361 KB | 1 | |
| 01:58, 16 February 2022 | PanGalaksija 3D keyboard preview.png (file) |  |
66 KB | 1 | |
| 01:41, 16 February 2022 | PanGalaksija keyboard schematic preview.pdf (file) | |
62 KB | 1 | |
| 17:06, 14 February 2022 | Desktop computer GALAKSIJA, 1983.jpg (file) |  |
1.34 MB | 1 | |
| 14:31, 14 February 2022 | Galakija Keyboard schematic.png (file) |  |
209 KB | 1 | |
| 12:46, 20 October 2020 | ZX81plus38rev1,6.pdf (file) | |
250 KB | Keyboard pullups changed to 10K from 4K7 | 2 |
| 20:20, 18 October 2020 | PCB PrevIew ZX81+38 rev 1,6 bottom.png (file) |  |
334 KB | bottom side revision 1,6 | 1 |
| 20:16, 18 October 2020 | PCB PrevIew ZX81+38 rev 1,6 top.png (file) |  |
448 KB | version with corrected A8 instead of A8' keyboard matrix | 1 |
| 23:33, 15 October 2020 | ZX81+38rev1,5 bottom.png (file) |  |
287 KB | bottom (solder) side | 1 |
| 23:22, 15 October 2020 | ZX81+38rev1,5 top.png (file) |  |
386 KB | Top (component) side revision 1.5 16 october 2020 | 1 |
| 17:15, 9 October 2020 | ZX81plus38rev1,5.png (file) |  |
286 KB | cropped half size | 2 |
| 16:59, 9 October 2020 | ZX81plus38rev1,5.pdf (file) | |
250 KB | corrected schematic | 1 |
| 15:19, 14 September 2020 | ZX81plus38Rev1,4BW.png (file) | Error creating thumbnail: File with dimensions greater than 12.5 MP |
691 KB | final schematic ZX81+38 (revision 1.4) in black and white | 1 |
| 23:45, 11 September 2020 | ZX81plus38 BOM.ods (file) |  |
18 KB | The Bill Of materials plus order codes for either Farnell, or Mouser | 1 |
| 23:39, 11 September 2020 | ZX81plus38Rev1.4BW.pdf (file) | |
238 KB | Final schematic of ZX-81+38 rev 1.4 in black and white | 1 |
| 21:55, 30 June 2020 | ZX81+35 REV 4.1 schematic.pdf (file) | |
68 KB | The lates schematic, 30 June, 2020 rev 4,1 of ZX81+35 | 1 |
| 21:45, 30 June 2020 | New Gerbers Rev 4,1 detail.png (file) |  |
126 KB | 1 | |
| 21:41, 30 June 2020 | New Gerbers Rev 4,1.png (file) |  |
192 KB | New version 4,1 with correct solder mask | 1 |
| 21:21, 30 June 2020 | Old gerbers Rev 4,0 detail.png (file) |  |
35 KB | This detail shows the problems clearly | 1 |
| 21:20, 30 June 2020 | Old Gerbers Rev 4,0.png (file) |  |
190 KB | This is a screen capture from a gerber viewer showing the file I uploaded end of 2019, there are clearly problems with it. | 1 |
| 12:45, 10 April 2020 | Final ZX81plus38 PCB rev 1,4 silk screen top.PNG (file) |  |
111 KB | Version of April 10, 2020 | 2 |
| 12:40, 10 April 2020 | Final ZX81plus38 PCB rev 1,4 bottom view.PNG (file) |  |
333 KB | scratch line JP11 to bottom side, pads of jumpers to 1.6mm instead of 1.7mm | 2 |
| 12:37, 10 April 2020 | Final ZX81plus38 PCB rev 1,4 top view.PNG (file) |  |
414 KB | Moved the last default jumper wire to the bottom, made jumper pads smaller | 2 |
| 10:40, 11 March 2020 | ZX81plus38 PCB rev 1,4 bottom view.PNG (file) |  |
325 KB | 1 | |
| 10:37, 11 March 2020 | ZX81plus38 PCB rev 1,4 top view.PNG (file) |  |
406 KB | 1 | |
| 10:16, 4 March 2020 | ZX81plus38 copper bottom.PNG (file) |  |
242 KB | PCB layout bottom without solder mask | 1 |
| 10:15, 4 March 2020 | ZX81plus38 copper top.PNG (file) |  |
144 KB | Copper top without solder mask | 1 |
| 00:28, 4 March 2020 | ZX81+38 4 maart 2020.png (file) |  |
66 KB | Final 100% routed, with copper fill. | 1 |
