Circuit Diagrams: Difference between revisions
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== J13 - Daughter board connector == | == Schematics == | ||
The KS1 and KS2 schematics can be downloaded [https://gitlab.com/thesmog358/tbblue/-/tree/master/docs/schematics?inline=false here]. | |||
The three tail matrix keyboard schematic can be downloaded [https://github.com/Threetwosevensixseven/NXtel/wiki/images/NS58A-5-01-04.pdf here]. | |||
== J13 - Daughter board connector - Issue 2A/2B == | |||
{| width=100% | |||
|valign=top width=50%| [[Image:DaughterLocation.jpg]] | |||
|valign=top| [[Image:Circuit_daughter_board.png]] | |||
|} | |||
<br/> | |||
== J13 - Daughter board connector - Issue 4 == | |||
{| width=100% | {| width=100% | ||
|valign=top width=50%| [[Image:DaughterLocation. | |valign=top width=50%| [[Image:J13-I4-DaughterLocation.png]] | ||
|valign=top| [[Image: | |valign=top width=25%| [[Image:J13-I4-CircuitDaughterBoard.png]] | ||
|} | |} | ||
<br/> | <br/> | ||
== J15 - Next GPIO == | == J15 - Next GPIO - Issue 2A/2B == | ||
{| width=100% | {| width=100% | ||
|valign=top width=50%| [[Image:NEXT_GPIO_location.jpg | |valign=top width=50%| [[Image:NEXT_GPIO_location.jpg]] | ||
|valign=top width=50%| [[Image:NEXT_GPIO.png|461px]] | |valign=top width=50%| [[Image:NEXT_GPIO.png|461px]] | ||
|} | |} | ||
| Line 17: | Line 32: | ||
<br/> | <br/> | ||
== Expansion bus (edge connector) == | == J15 - Next GPIO - Issue 4 == | ||
{| width=100% | |||
|valign=top width=40%| [[Image:J15-I4-GPIOLocation.png]] | |||
|valign=top| [[Image:J15-I4-CircuitGPIO.png]] | |||
|} | |||
<br/> | |||
== CN5 - Expansion bus (edge connector) == | |||
{| width=100% | {| width=100% | ||
|valign=top width=50%| [[Image:Expansion_bus_location.jpg | |valign=top width=50%| [[Image:Expansion_bus_location.jpg]] | ||
|valign=top| [[Image:Expansion_bus.png|461px]] | |valign=top| [[Image:Expansion_bus.png|461px]] | ||
|} | |} | ||
| Line 26: | Line 50: | ||
<br/> | <br/> | ||
== Memory Expansion Ports == | == J10/J11 - Memory Expansion Ports == | ||
{| width=100% | {| width=100% | ||
|valign=top width=50%| [[Image:Mem_Expansion_location.jpg | |valign=top width=50%| [[Image:Mem_Expansion_location.jpg]] | ||
|valign=top| [[Image:Mem_Expansion.png|461px]] | |valign=top| [[Image:Mem_Expansion.png|461px]] | ||
|} | |||
<br/> | |||
== J4/J7 J8/J14 - Joystick Ports == | |||
{| width=100% | |||
|valign=top width=50%| [[Image:Joystick_Ports_Location.jpg]] | |||
|valign=top| [[Image:Joystick_Ports.png]] | |||
|} | |||
<br/> | |||
== CN1 - VGA Video Port == | |||
{| width=100% | |||
|valign=top width=50%| [[Image:Video_Port_Location.jpg]] | |||
|valign=top| [[Image:Video_Port.png]] | |||
|} | |||
Notes: | |||
* In VGA mode (scandoubler enabled), H-SYNC and V-SYNC are carried separately on their respective pins. | |||
* In RGB mode (scandoubler disabled), H-SYNC carries composite sync, and V-SYNC carries 1. | |||
* Pin 14 carries 3V3, which can be connected to SCART pin 16 to indicate RGB to the display. | |||
* There is no convenient source of voltages between 9.5-12V to indicate 4:3 aspect ratio to the display on SCART pin 8, so this is usually left unconnected. | |||
<br/> | |||
== CN8 - Digital Port == | |||
{| width=100% | |||
|valign=top width=50%|[[Image:Digital Port Location.jpg]] | |||
|valign=top| [[Image:Next Digital Port.png]] | |||
|} | |||
<br/> | |||
== CN2/CN6/CN7 - SD Reader (Mainboard) (CN6 on reverse) == | |||
{| width=100% | |||
|valign=top width=50%| [[Image:SD_Reader_Port_Location.jpg]] | |||
|valign=top| [[Image:SD_Reader_Main.png]] | |||
|} | |||
<br/> | |||
== CN10/CN11/CN12 - SD Reader (Daughterboard) (CN12 on reverse) == | |||
{| width=100% | |||
|valign=top width=50%| [[Image:SD_Reader_Daughter_Port_Location.jpg]] | |||
|valign=top| [[Image:SD_Reader.png]] | |||
|} | |||
<br/> | |||
== Accelerator Board == | |||
{| width=100% | |||
|valign=top width=50%| [[Image:Accelerator_Port_Location.jpg]] | |||
|valign=top| [[Image:Accelerator_Port.png]] | |||
|} | |||
<br/> | |||
== Real Time Clock (RTC) == | |||
{| width=100% | |||
|valign=top width=50%| [[Image:RTC_Port_Location.jpg]] | |||
|valign=top| [[Image:RTC_Port.png]] | |||
|} | |||
<br/> | |||
== CN9 - ESP8266-01/RS-232 Port == | |||
{| width=100% | |||
|valign=top width=50%| [[Image:Wifi_Port_Location.jpg]] | |||
|valign=top| [[Image:Next_ESP_Port.png]] | |||
|} | |} | ||
<br/> | <br/> | ||
Revision as of 11:04, 10 December 2023
Schematics
The KS1 and KS2 schematics can be downloaded here.
The three tail matrix keyboard schematic can be downloaded here.
J13 - Daughter board connector - Issue 2A/2B
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J13 - Daughter board connector - Issue 4
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J15 - Next GPIO - Issue 2A/2B
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J15 - Next GPIO - Issue 4
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CN5 - Expansion bus (edge connector)
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J10/J11 - Memory Expansion Ports
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J4/J7 J8/J14 - Joystick Ports
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CN1 - VGA Video Port
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Notes:
- In VGA mode (scandoubler enabled), H-SYNC and V-SYNC are carried separately on their respective pins.
- In RGB mode (scandoubler disabled), H-SYNC carries composite sync, and V-SYNC carries 1.
- Pin 14 carries 3V3, which can be connected to SCART pin 16 to indicate RGB to the display.
- There is no convenient source of voltages between 9.5-12V to indicate 4:3 aspect ratio to the display on SCART pin 8, so this is usually left unconnected.
CN8 - Digital Port
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CN2/CN6/CN7 - SD Reader (Mainboard) (CN6 on reverse)
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CN10/CN11/CN12 - SD Reader (Daughterboard) (CN12 on reverse)
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Accelerator Board
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Real Time Clock (RTC)
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CN9 - ESP8266-01/RS-232 Port
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