VELESOFT - DATAGEAR

DATA-GEAR is DMA interface for 8-bit computers with Z80CPU. Original schematic is DMA part of interface MB02+. DATA-GEAR is connected to socket for Z80CPU, there's no need any hardware modifications in your computer. DMA chip use dirrect access to memory or port. Transfer of linear data block (max. 64kB) memory to memory / memory to port / port to memory / port to port. For computers with max. CPU speed 4MHz is used Z80DMA chip, but for faster computers (SAM COUPE=6MHz, ZS SCORPION TURBO=7MHz ...) is need use DMA chip at 6-8MHz. DMA chip is programmed via port 11(#0B) = MB02 compatible. On board is jumper JP1 for change programming port to 107(#6B). If JP1 is connect, then port 107(#6B) is used.

Max. speed of data transfer on ZX128+ is 17.3 kB(17727 bytes) / frame = 865.6 kB(886350 bytes) / second

GREYSCALE MULTITECH GRAPHICS (more info) FULLSCREEN MULTICOLOR PICTURES ON MONOCHTOMATIC MONITOR MB02 / DATA-GEAR / TIMEX / PENTAGON

COLOR MULTITECH GRAPHICS FULLSCREEN MULTICOLOR PICTURES by Omega





















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GRAPHICS MULTITECH SCREEN VIEWER + GREYSCALE PICTURES 1 MULTITECH SCREEN VIEWER + GREYSCALE PICTURES 2 MULTITECH SCREEN VIEWER + COLOR PICTURES MULTITECH SCREEN VIEWER - SOURCE CODE MULTITECH DMA EFFECTS (from DNA demo by Omega) - SOURCE CODE MULTITECH SCREEN VIEWER for TIMEX / PENTAGON without DMA + GREYSCALE PICTURES 1 MULTITECH SCREEN VIEWER for TIMEX / PENTAGON without DMA + GREYSCALE PICTURES 2 MULTITECH SCREEN VIEWER for TIMEX / PENTAGON without DMA + COLOR PICTURES MULTITECH SCREEN VIEWER for TIMEX / PENTAGON without DMA - SOURCE CODE GRAPHIC CONVERTORS ZXS MULTITECH CONVERTOR for PC ( link to original 8BC webpage ) BMP2SCR EXP 2.11a BMP2SCR EXP 2.10b BMP2SCR PRO 2.01 BMP2SCR 1.751 BMP2SCR v1.75 BMP2SCR v1.74 BMP2SCR v1.73 BMP2SCR v1.70 BMP2SCR v1.62 BMP2SCR_INSTR BMP2SCR PRO 2.00c INSTR RETRO X - alpha 5

Original schematic (8BC Company)

Z80 DMA - PINOUT

.       8410, Z8410, Z80DMA
.   Z80 DMA controller - PINOUT
.
.         +-----+ +-----+
.      A5 |1    +--+   40| A6
.      A4 |2           39| A7
.      A3 |3           38| IEI
.      A2 |4           37| /INT /PULSE
.      A1 |5           36| IEO
.      A0 |6           35| D0
.     CLK |7           34| D1
.     /WR |8           33| D2
.     /RD |9           32| D3
.   /IORQ |10   Z8410 31| D4
.     VCC |11    DMA   30| GND
.   /MREQ |12          29| D5
.    /BAO |13          28| D6
.    /BAI |14          27| D7
. /BUSRQ |15          26| /M1
./CE/WAIT |16          25| RDY
.     A15 |17          24| A8
.     A14 |18          23| A9
.     A13 |19          22| A10
.     A12 |20          21| A11
.         +--------------+

LIST OF Z80DMA MANUFACTURERS ZILOG: (tested with Data-Gear) - Z841004 = 4MHz - Z84C1006 = 6MHz - 6 MHz version - ideal for SAM COUPE or ZX - Z84C1008 = 8MHz - faster type of DMA, ideal for fast Russian ZX clones with Z80CPU at 7MHz (too for SAM or ZX) RFT: *(tested with Data-Gear)* - UA858D = 4MHz - German DMA clone used in MB02+ interface MOSTEK: (tested with Data-Gear) - MK3883N4 = 4MHz - MK3883N = 2.5MHz - tested on ZX, work correct on 3.58 MHz ST: (tested with Data-Gear) - Z8410AB1 (4MHz) TOSHIBA: - TMPZ84C10AP-6 = 6MHz SHARP: - LH0083A - Japan Z80DMA clone (4MHz ?) SGS: - Z8410AB1 - Italian Z80DMA clone (4MHz ?)
MOSTEK(2.5 MHz) and UA858D(4MHz)	SHARP(4MHz) and TOSHIBA(6MHz)

SGS	ST(4MHz)

EXAMPLE OF DMA MULTICOLOR IN BORDER AREA
(transfer mode 2T read data from memory + 2T write data to port #FE)

DMA - DEMOS ( info about DMA demos 1-3)
DMA DEMO LEVEL 1 by Busysoft ( .AVI )	DMA DEMO LEVEL 2 by Busysoft ( .AVI )
DMA DEMO LEVEL 3 by Busysoft	D N A DEMO by Omega ( .AVI )
NaPICU DEMO by DRON of K3L

DMA - GAMES
ELITE by Omega	INTER. KARATE A by Omega	INTER. KARATE B by Omega
VISITORS by Omega	GHOSTBUSTERS 128 by Omega

DMA - UTILITIES
EASY HDD 1.05 (for DataGear)