Zalt Video and Sound

obiwanjacobi·Zalt·VDP Board v1.0 - locked/Kicad/VDP-Composite.kicad_pcb

Zalt Video and Sound PCB layout, top view — open source board by obiwanjacobi

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About the Zalt Video and Sound PCB

Zalt Video and Sound is an open source PCB design by obiwanjacobi, published on GitHub under the Custom license license. It is a 2-layer board measuring 99.7 × 99.7 mm, with 107 components from 38 distinct parts.

Other key parts include the G22V10, 74HCT574, V9958, 74HCT04 and CXA1645. By type, the board carries 45 resistors, 40 capacitors, 12 ICs, 3 crystals, 3 connectors and 1 jumper.

It belongs with the retro computing designs in this gallery.

From the project

Zalt is a home brew Z80 computer with a modern(isch) chipset.

This Board contains the V9958 (video) and a YM2149 (sound) vintage chips. It contains the full set of DRAMs for the V9958, that is a VRAM of 128kB and an extra 64kB extension.

The video signals are available on an IDC connector with grounds separating each signal. RGB and Composite video as well as Chroma and Luma (s-video) signals are present. Note that this is not VGA! Also the stereo Audio is available on this connector.

Main components on the Zalt Video and Sound

G22V10 74HCT574 V9958 74HCT04 CXA1645 D41464 YM2149

Zalt Video and Sound bill of materials (BOM)

107 components, 38 distinct parts.

Qty	Part	Footprint	Refs
1	G22V10	DIP-24_W7.62mm_LongPads	U101
1	74HCT574	SOIC-20W_7.5x12.8mm_P1.27mm	U102
1	V9958	DIP-64_1.78mm_W19.05mm	U201
1	74HCT04	SOIC-14_3.9x8.7mm_P1.27mm	U202
1	CXA1645	DIP-24_W10.16mm_LongPads	U203
6	D41464	DIP-18_W7.62mm_LongPads	U301, U302, U303, U304, U305, U306
1	YM2149	DIP-40_W15.24mm_LongPads	U401
1	21.47727MHz	Crystal_HC49-4H_Vertical	Y201
1	4.433618MHz	Crystal_HC49-4H_Vertical	Y202
1	2-4MHz	Crystal_HC49-4H_Vertical	Y401
1	Power +5V	TerminalBlock_bornier-2_P5.08mm	J101
1	AVConn	IDC-Header_2x10_P2.54mm_Horizontal	J207
1	Ports	PinHeader_2x10_P2.54mm_Vertical	J401
1	P***	1pin	1PIN
1	BUSHDR-A	PinHeader_2x20_P2.54mm_Vertical	HDR101
1	BUSHDR-B	PinHeader_2x20_P2.54mm_Vertical	HDR102
1	EnableIM	PinHeader_1x03_P2.54mm_Vertical	JP102
22	100nF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C101, C102, C205, C206, C208, C210, C211, C212 +14
3	30pF	C_Disc_D6.0mm_W4.4mm_P5.00mm	C201, C204, C405
3	22pF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C202, C203, C404

Show 18 more

Qty	Part	Footprint	Refs
1	*27/18pF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C207
1	10uF	CP_Elec_4x3	C209
1	4.7pF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C215
1	47pF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C216
8	220uF	CP_Elec_6.3x7.7	C217, C218, C219, C220, C221, C222, C402, C403
1	470k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R201
15	10k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R202, R203, R204, R205, R206, R207, R208, R209 +7
7	1k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R214, R220, R232, R236, R406, R407, R408
2	1M	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R215, R409
4	470	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R217, R222, R223, R225
1	*20/16k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R219
1	2.2k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R221
1	47k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R224
6	75	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R226, R227, R228, R229, R230, R231
1	120	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R234
1	180	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R235
3	3k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R401, R402, R403
2	1k6	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R404, R405

Zalt Video and Sound design files

The KiCad project lives in the obiwanjacobi/Zalt repository on GitHub; these links point at the commit this page was built from.

LayoutVDP Board v1.0 - locked/Kicad/VDP-Composite.kicad_pcb

Zalt Video and Sound: common questions

How big is the Zalt Video and Sound PCB?

The Zalt Video and Sound measures 99.7 × 99.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Zalt Video and Sound?

107 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the Zalt Video and Sound design files?

From the obiwanjacobi/Zalt repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Zalt Video and Sound design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

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