GBA1000 New board production (V4)

[webheadx1]

so thats going to make it a pig then , damn so what your saying is no power supply has a tick signal?

so where all going to be stuck then until we have worked this out bummer.

[CUF85]

In my opinion, this motherboard is shaped like an a1000 but it's not one. So i assume that an ordinary psu will work. I haven't read anything about a tick signal in the docs. But i can be wrong too.

[BLTCON0]

The schematics available here show support for the PSU tick signal (page 5).
They also show (page 3) that vsync can be used instead (jumper selection).
So either option is available, just like in the A2000.
These are older schematics but I doubt the V4 design would ditch that convenience.

[CUF85]

So either can be used. Good news.

[Jawd]

I just read the German manual and the schematics for the rev.4 board and the tick signal can be used from either the psu or from the v-sync.

Über den Jumper X16 kann dem CIA IC40 das TICK-Signal (Jumper rechts) oder das /VSYNC-Signal (Jumper links) zugeführt werden. Dieses 50Hz Signal wird für die interne Signalverarbeitung des Custom-Chip-Systems benötigt und wurde beim A1000 über das Netzteil als TICK-Signal zur Verfügung gestellt. Bei den nachfolgen- den Modell wurde dann das /VSYNC-Signal benutzt. Das A1000 Mainboard arbeitet mit beiden Einstellungen. Sollte das Netzteil kein TICK-Signal zur Verfügung stellen (z.B. Austauschnetzteil) ist die Einstellung /VSYNC zwingend erforderlich.

[Slayer]

This is all getting a little confusing for me now since I am too busy to check on this thread. Last time I said anything was in relation to FPU and err 68882? Don't let me get left behind please, but remember, I need enough for 2 boards worth

[webheadx1]

hi george told me you just set the jumper ,x16 so you dont need tick clock so now can use anything really to power it yipe.

[bjavor]

I've seen various references to some German language detailed pdf about the board but can't seem to be able to find it. Could someone send me a link please?

[kipper2k]

Here is the info on the Video Hybrid module i made, People who are buying this as a kit will definately need this.



here's the links to the placement

http://www.kipper2k.com/amiga/videoh...dhybridtop.pdf
http://www.kipper2k.com/amiga/videoh...dhybridbot.pdf

Here's the BOM

Part Value Device Package Description
C1 0.1u C-USC0805 C0805 CAPACITOR,
C2 0.1u C-USC0805 C0805 CAPACITOR,
C3 0.1u C-USC0805 C0805 CAPACITOR,
C4 0.1u C-USC0805 C0805 CAPACITOR,
C5 0.1u C-USC0805 C0805 CAPACITOR,
Q1 MMBT3904LT1-NPN-SOT23-BEC SOT23-BEC NPN Transistror
Q2 MMBT3904LT1-NPN-SOT23-BEC SOT23-BEC NPN Transistror
Q3 MMBT3904LT1-NPN-SOT23-BEC SOT23-BEC NPN Transistror
Q4 MMBT3904LT1-NPN-SOT23-BEC SOT23-BEC NPN Transistror
Q5 MMBT3904LT1-NPN-SOT23-BEC SOT23-BEC NPN Transistror
Q6 3906LT1SMD MMBT3906LT1SMD SOT23-BEC PNP Transistror
R1 1k R-US_M0805 M0805 RESISTOR,
R2 2k R-US_M0805 M0805 RESISTOR,
R3 4.02k R-US_M0805 M0805 RESISTOR,
R4 8.02k R-US_M0805 M0805 RESISTOR,
R5 470 R-US_M0805 M0805 RESISTOR,
R6 390 R-US_M0805 M0805 RESISTOR,
R7 75 R-US_M0805 M0805 RESISTOR,
R8 75 R-US_M0805 M0805 RESISTOR,
R9 1k R-US_M0805 M0805 RESISTOR,
R10 2k R-US_M0805 M0805 RESISTOR,
R11 4.02k R-US_M0805 M0805 RESISTOR,
R12 8.02k R-US_M0805 M0805 RESISTOR,
R13 470 R-US_M0805 M0805 RESISTOR,
R14 390 R-US_M0805 M0805 RESISTOR,
R15 75 R-US_M0805 M0805 RESISTOR,
R16 75 R-US_M0805 M0805 RESISTOR,
R17 1k R-US_M0805 M0805 RESISTOR,
R18 2k R-US_M0805 M0805 RESISTOR,
R19 4.02k R-US_M0805 M0805 RESISTOR,
R20 8.02k R-US_M0805 M0805 RESISTOR,
R21 470 R-US_M0805 M0805 RESISTOR,
R22 390 R-US_M0805 M0805 RESISTOR,
R23 75 R-US_M0805 M0805 RESISTOR,
R24 75 R-US_M0805 M0805 RESISTOR,
R25 1k R-US_M0805 M0805 RESISTOR,
R26 220 R-US_M0805 M0805 RESISTOR,
R27 27k R-US_M0805 M0805 RESISTOR,
R28 150 R-US_M0805 M0805 RESISTOR,
R29 75 R-US_M0805 M0805 RESISTOR,
R30 90.9k R-US_M0805 M0805 RESISTOR,
R31 37.4k R-US_M0805 M0805 RESISTOR,
R32 13.3k R-US_M0805 M0805 RESISTOR,
R33 6.04k R-US_M0805 M0805 RESISTOR,
R34 37.4k R-US_M0805 M0805 RESISTOR,
R35 19.6 R-US_M0805 M0805 RESISTOR,
R36 270 R-US_M0805 M0805 RESISTOR,
R37 36 R-US_M0805 M0805 RESISTOR,
R38 36 R-US_M0805 M0805 RESISTOR,
R39 75 R-US_M0805 M0805 RESISTOR,

All resistors are of the thick film type and 1% tolerance.

[CUF85]

Nice one kipper!!

Can't wait to make these.