Apple-2-HW/TommyPROM
2
0
Fork 1
mirror of https://github.com/TomNisbet/TommyPROM.git synced 2024-12-31 04:30:16 +00:00
Code Issues Projects Releases Wiki Activity

add TommyPROM32 schematic image

Browse Source
This commit is contained in:
Tom Nisbet 2023-09-18 15:08:10 -04:00
parent 91cc45e700
commit d8baefaaf4
5 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
docs/_docs/design-300-pcb.md
View File

@ -61,9 +61,10 @@ planned with multiple _VPP Output_ pins and some general-purpose interconnect pi
[![TommyPROM PCB](images/TommyPROM32-27C257-erase-500.jpg)](images/TommyPROM32-27C257-erase.jpg)
For chips that require a high voltage VPP pulse during programming, some external
switching circuitry will be needed to allow the Arduino to control the VPP voltage. There
is a header connected to the unused D13 pin that can support this. See the
[Intel 8755 version of the hardware](hardware/#intel-8755a-hardware-version) for an
example of voltage switching by TommyPROM.
[![TommyPROM PCB](images/TommyPROM32-sch-700.png)](images/TommyPROM32-sch.png)

BIN
docs/_docs/images/TommyPROM-connections-sch.png Normal file
View File

Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 26 KiB

BIN
docs/_docs/images/TommyPROM32-sch-500.png
View File

Binary file not shown.
Side by Side

Before

Width:  |  Height:  |  Size: 84 KiB

BIN
docs/_docs/images/TommyPROM32-sch-700.png Normal file
View File

Binary file not shown.
Side by Side

After

Width:  |  Height:  |  Size: 128 KiB

BIN
docs/_docs/images/TommyPROM32-sch.png
View File

Binary file not shown.
Side by Side Swipe Overlay

Before

Width:  |  Height:  |  Size: 52 KiB

After

Width:  |  Height:  |  Size: 67 KiB