Current BOM for Z80 v4 ?

[Steven Hirsch]

Sorry to be dense, but I do not see a BOM spreadsheet on Norberto's web site.
Where can I find the most current BOM and assembly notes (if they exist)?

[Glenn Roberts]

I don't believe I've seen anyone work on one of those. Presumably 95% overlap with previous Rev of the board?

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[Norberto Collado]

I will take a look at it and make the changes. For now, this is what I can see on changes.

Changes:
6-pcs of 1N4149
1-pcs of 3.68MHz OSC.
1-pcs of 78L12
1-pcs of 79L12
1-pcs of 28C256
1-pcs of TL7705
1-pcs of 3-pin header "RAM_DIS"
1-pcs of 3-pin header "DUAL_OSC"
4-pcs of 2-pin header "+8V JMP"
1-pcs of 2-pin-header "BANK_SEL_L"
1-pcs of 2-pin-header "FP-CLOCK"
1-pcs of 5-pin header "E/EE"
1-pcs of GAL16V8
1-pcs of 33 OHMs resistor
1-pcs of 3-pin header "RD_L"
1-pcs of 3-pin header "WR_L"
x-pcs of 2.2uf - need to find delta
x-pcs of 10K - need to find delta
x-pcs of 0.1uf - need to find delta

Deleted:
SW2
74LS688
RP2
U7 74HCT30
U11 LM555
68K RESISTOR
U25 LM7812
U26 LM7912
U115 - TL7757
UX - TL7757
U5-74LS10
Z - 3-PIN HEADER
X - 2 PIN JUMPER
Y - 3X1 PIN JUMPER
C2 - 2PIN HEADER
B2 - 2 PIN HEADER
JP1 - 3-PIN HEADER

DUAL UART CONTROLLER/USB (I will create a new BOM)
REFER TO THIS LINK FOR ADDITIONAL CHANGES:
http://koyado.com/Heathkit/H8-Z80-64K-RTC-ORG0-V4_files/DUART_USB_Components.png
http://koyado.com/Heathkit/H8-Z80-64K-RTC-ORG0-V3_files/Z80_DUARTs_USB_Schematics.pdf

Note: On the DUAL USART/USB board there is X1-1.8432 Oscillator part. Do not buy/install as it was moved to the Z80 board and renamed "3.68MHz OSC." Also the J1 part number is wrong.

Thanks,
Norberto

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[George Farris]

So Glenn did you mean this version?
http://koyado.com/Heathkit/H8-Z80-64K-RTC-ORG0-V3.html

and presumably the speed utilities can be had from there as well?

George

[norberto...@koyado.com]

We are working on the BOM for the new board. Sorry about the delay.

Thanks,
Norberto

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[Glenn Roberts]

Yes. I think Terry Smedley may be working on a BOM for the Rev 4 board (?)

Yes the speed utilities should be the same for the two boards I believe...

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[Norberto Collado]

Attached is first Pass for the BOM, which I'm still reviewing. There is a PDF file and Excel file with the first Column locked. Feel free to use and report out any issues.

 

I will like to thank Terry Smedley for putting this together as it takes a lot of time and energy.

 

For next BOM on the H8 Front Panel, I will load it into Mouser.com as a BOM, so that it is easy to buy all the parts easily.

 

Thanks,

Norberto

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[Norberto Collado]

Here is the link to the Z80 V4.0 Jumper Settings.

 

http://koyado.com/Heathkit/H8-Z80-64K-RTC-ORG0-V4_files/Z80_V_4_0_Jumper_Definition.pdf

 

Thanks to Terry S. for taking the time and efforts to create such file.

 

Let us know if any concerns.

 

Norberto

[Norberto Collado]

My bad on first line:

 

SW501	ORG0 Config – Refer to slide # 6 on how to setup such switch based on HW configuration

 

The switch listed in this file is when using Heath PAM37 monitor on the Z80 V4 board. The Z80 V4 board supports all Heath monitors as it is backwards compatible.

 

For Z80 v4 monitor : h8mon2-v2.0b24.rom.zip

 

SW501 is as follows:

 

 

For Terry’s G. monitor is going to be different (WIP)

 

Thanks,

Norberto

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[norberto.collado koyado.com]

Updated file here: http://koyado.com/Heathkit/H8-Z80-64K-RTC-ORG0-V4_files/Z80_V_4_0_Jumper_Definition-2.pdf

Thanks,

Norberto

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From: se...@googlegroups.com <se...@googlegroups.com> on behalf of Norberto Collado <norberto...@koyado.com>

Sent: Monday, April 19, 2021 10:42 PM

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[Terry Smedley]

With some feedback from Z80 v4 boards being built, some improvements have been made to the jumper settings document.  Norberto will publish this to his website when he has an opportunity.

Changes:

- setting for JP15 (RAM_DIS) was backwards

- all jumpers are now labeled "TOP", "BOTTOM", "LEFT", "RIGHT" to avoid any confusion about Pin 1 orientation (which can be different from jumper to jumper)

The BOM appears to be reasonably accurate.

Some build notes:

- If you choose to use the ZIF socket for the EEPROM at U100, you may want to mount bypass cap C28 from the back of the board and clip the leads very tight to the front of the board to avoid interference with the socket

- The ZIF socket adds some height to the EEPROM and the clearance required underneath the DUART piggyback board.  A higher-clearance alternative to the 40-pin machined socket and pin headers shown in the BOM is to use the same mounting scheme used with the H17 daughtercard on the new storage controller.   The under-DUART board clearance has to be balanced against the above-DUART board clearance against the front panel.

- It has been recommended to omit installing headers at JP22,23,26, and 27 (the voltage regulator bypass jumpers) if you are not immediately planning to use a PC-style power supply to put regulated voltages on the H8 bus.  There is the possibility of smoke and the smell of burning electronics if jumpers are inadvertently placed there with the standard H8 power supply in place.

- If you use the Pololu buck/boost switching regulators, the jumpers at JP22 and JP23 are never needed, regardless of which power supply you use

- The two blocks labeled "+12v" and "-12v" are not jumpers, and no headers are specified for them on the BOM.  They can be used as test points, or power takeoffs for very modest +/-12v requirements.

Please post your build experiences, or note any document discrepancies, so we can keep the documentation up-to-date.

Thanks to Glenn, who allowed me to steal his v3.1 jumper settings document and modify it for use with the new board.  And special thanks to Norberto for patiently guiding us through the build process.

Terry

[norberto.collado koyado.com]

Thanks, Terry, for all your help! I just updated the website with your information.

On the ZIP socket, let's use instead the regular machine tooled socket, as the EEPROM can be updated In-Circuit. 

I bought this one last year which fits nicely for debug, but strongly suggest using the machine tooled socket instead.

Thanks,

Norberto

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