Apple-2-HW/TommyPROM
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Author SHA1 Message Date
Tom Nisbet
49877f6708
Merge pull request #57 from wjhun/27C040-pgmtype 
update PgmType for 27C040 EPROM
 2023-07-21 11:42:33 -04:00
Will Jhun
a42ecc2719 update PgmType for 27C040 EPROM 
The (AMD/Atmel) 27C040 EPROM doesn't have a dedicated Write Enable (WE),
instead sharing the same pin for CE# and PGM#. This updates the PromDevice27
line for this device to use the E27C_PGM_CE PgmType.

This configuration has been successfully used to read, program and verify an
AM27C040 device. A +12.75V voltage was applied to Vpp during the duration of
device programming.
 2023-07-15 15:10:57 -04:00
Tom Nisbet
8a3995a309 V2.0 of the TommyPROM32 board 2023-01-20 11:03:07 -05:00
Tom Nisbet
471c8042e1 gitignore updates 2023-01-20 10:58:46 -05:00
Tom Nisbet
195f94f9a0 Add W27C512 2022-12-22 13:11:10 -05:00
Tom Nisbet
7d5ab86275 Add support for SST27C0x0 flash chips 2022-12-14 16:38:28 -05:00
Tom Nisbet
035b3412af Add support for SST28SF SuperFlash 2022-12-13 17:15:20 -05:00
Tom Nisbet
947dc24adf broken doc image links 2022-12-13 08:42:46 -05:00
Tom Nisbet
aa1b7cdcc6 TommyPROM32 PCB docs 2022-12-12 18:58:45 -05:00
Tom Nisbet
9ff44e0d41 expand chips tested list in docs 2022-12-12 18:05:27 -05:00
Tom Nisbet
a2129459df expand chips tested list in docs 2022-12-12 18:02:26 -05:00
Tom Nisbet
c6b91d0768 device support for 27E257/27C257 2022-12-10 11:18:52 -05:00
Tom Nisbet
fc42ef50e1 doc links 2022-12-06 19:43:34 -05:00
Tom Nisbet
841e1f3ab7 schematics for TommyPROM32 and adapters 2022-12-03 12:01:21 -05:00
Tom Nisbet
3bfbc7d323 doc updates for PCB 2022-11-25 08:25:49 -05:00
Tom Nisbet
ffd11270c5 broken link in docs 2022-11-24 23:00:49 -05:00
Tom Nisbet
3eb78e359c Add PCB page to prep for new board 2022-11-24 22:57:01 -05:00
Tom Nisbet
7cdb54b77f image link 2022-11-24 22:31:04 -05:00
Tom Nisbet
a9a9ac3a28 Remove unused methods; update PCB photo 2022-11-24 22:27:58 -05:00
Tom Nisbet
b618f46ca3 new photo of PCB version 2022-08-18 12:42:39 -04:00
Tom Nisbet
297b52f1e5 image link 2022-08-18 12:16:09 -04:00
Tom Nisbet
c321a25b8c add linkable images to docs 2022-08-18 10:27:02 -04:00
Tom Nisbet
1160c038e5 link typo 2022-08-18 10:21:04 -04:00
Tom Nisbet
53f71673d7 fix file name 2022-08-18 10:17:51 -04:00
Tom Nisbet
b3388d5518 image link 2022-08-18 10:15:20 -04:00
Tom Nisbet
5dd506fc79 image link 2022-08-18 10:12:09 -04:00
Tom Nisbet
f6a09b3327 image link 2022-08-18 10:08:48 -04:00
Tom Nisbet
d710adc60c add PCB to documentation 2022-08-18 10:05:43 -04:00
Tom Nisbet
2cc38ef5f7 re-order docs nav menu 2022-08-15 13:55:31 -04:00
Tom Nisbet
fc0153d520 fix image link 2022-08-15 13:52:33 -04:00
Tom Nisbet
e4db4980a1 fix image link 2022-08-15 13:50:32 -04:00
Tom Nisbet
9777edba29 Updated documentation for 3.0 2022-08-15 13:48:49 -04:00
Tom Nisbet
fb877244c1 Add preliminary support for SST39SF flash 2022-08-12 23:34:46 -04:00
Tom Nisbet
7483cc5b59
Update README.md 
add link to 28C256 notes
 2022-08-07 08:54:50 -04:00
Tom Nisbet
78e14a26b0 add photo of the prototype 74LS595 build 2021-05-27 10:17:14 -04:00
Tom Nisbet
f0d87800c2 Add KiCad files 2021-05-25 17:13:37 -04:00
Tom Nisbet
b91e25b36c swap LED direction 2021-05-06 12:09:50 -04:00
Tom Nisbet
148cef3cd3 v1.1 pcb images for review 2021-05-05 19:55:55 -04:00
Tom Nisbet
9a9f7edd23 update pcb images 2021-05-05 09:57:50 -04:00
Tom Nisbet
4b2c94a3d2 pcb for review 2021-05-05 09:04:44 -04:00
Tom Nisbet
acf163e29a broken link 2021-04-30 10:37:07 -04:00
Tom Nisbet
e6b87d00a3 make schematic image a link 2021-04-30 10:30:54 -04:00
Tom Nisbet
94ddb5c333 remove comment about missing connections 2021-04-30 10:26:26 -04:00
Tom Nisbet
92fd821bf0 redraw schematic in Kicad 2021-04-30 10:21:31 -04:00
Tom Nisbet
4ec1816c35 commas matter 2020-11-27 14:20:57 -05:00
Tom Nisbet
00f1bd6aa5 Update hardware docs for issue #21 2020-11-27 14:17:58 -05:00
Tom Nisbet
2e87e5454b Note the connection of the 74LS595 G/OE pin 2020-11-14 14:53:55 -05:00
Tom Nisbet
e4703f4a88 Issue #20 - TeraTerm XModem file transfers with W command. 2020-11-14 13:26:08 -05:00
Tom Nisbet
ec4686bfa0 File transfer default back to XModem-CRC for #20 2020-11-11 17:46:31 -05:00
Tom Nisbet
b131fbe8ae Fix #19 - XModem changed from 16-bit CRC to 8-bit checksum 2020-10-14 11:58:14 -04:00