Z180 Mark IV

Introduction

The Z180 Mark IV is a single board computer, meaning it may run stand-alone. It also has an interface to the RetroBrew bus (ECB) for access to additional peripheral boards.

www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_boards_sbc_z180_mark_iv_markivr2.jpg

Specifications

  1. A Z180 cpu up to 33Mhz. Using an 18.432Mhz oscillator, the newest Z180 processors are easily overclocked 2X to 36.864Mhz.
  2. 512k of static RAM memory. Up to 1Mb of EPROM, or up to 512k FLASH memory.
  3. Date/time clock with battery backed NVRAM (DS1302). Backup power is usually provided by a 0.22F super-capacitor.
  4. Terminal connection through an RS-232 port using an IBM-PC serial port 10-pin header.
  5. Twisted pair FDX communication through an RJ-12 (6P4C) modular jack.
  6. A Secure Digital (SD) card slot. Standard, HC, and XC cards are supported by ROM firmware.
  7. A 40-pin IDE connector which supports 8-bit transfers, and is usually used with a Compact Flash card Master/Slave adapter.

Power is supplied to the Mark IV SBC through the ECB bus, or through a 4-pin Molex connector (PC/AT disk drive power connection). The board operates using +5V power only.

Board Archive pages here.

Board

Schematic: :boards:sbc:z180_mark_iv:markiv-sch-2.0-008-rev.pdf

PCB Layout: :boards:sbc:z180_mark_iv:markiv-brd-2.0-008.pdf

Parts List: :boards:sbc:z180_mark_iv:mark_iv-parts_list-2.0-008-rev.txt

Gerber (MFG)::boards:sbc:z180_mark_iv:markiv-2.0-008a-mfg.zip

OBSOLETE: Gerber :boards:sbc:z180_mark_iv:markiv-2.0-008-mfg.zip (out of date Silkscreen layer)

The circuit layers of the two Gerber ZIPs are identical. The “008a” Gerbers correct information on the Silkscreen layer)

Note: For board manufacture at JLPCB rename the PCB_Edges, Inner2, Inner3 file from .gbr to .gm1, .gp1 and .gp2 respectively.

Construction

Install SD card socket before installing RR2 so solder pads are more accessible.

Note C40 is installed inside of the socket. Ensure socket has appropriate clearance or install C40 on rear of board.

Jumper Configuration

RESET CONFIGURATION

  • P1 1-2 N8VEM (LEGACY)
  • P1 2-3 KONTRON

IDE POWER

  • P9 CLOSED = VCC TO IDE
  • P9 OPEN = GND TO IDE

ON BOARD PERIPHERALS ADDRESS

  • P10 80H = OXXX

EPROM (27C080)

  • P11 1-2
  • P12 1-2

FLASH (29F040)

  • P11 2-3
  • P12 2-3

Connectors

EXTERNAL RESET

  • P2

Firmware

The UNA BIOS was developed on the Mark IV, and was updated to version 2.1 in January 2017. The distributed images contain Will Sowerbutt's port of CP/M 2.2.

See: software/ firmwareos / una / binaries for the binary (.tgz and .zip) and source files.

Wayne's RomWBW is also distributed for this board.

See: software/ software:firmwareos / romwbw for details.

Benchmark

asciiart.bas benchmark for Mark IV 18.348Mhz Z180 board running Microsoft MBASIC v5.21:

0m58s

10 FOR Y=-12 TO 12
20 FOR X=-39 TO 39
30 CA=X*.0458
40 CB= Y*.08333
50 A=CA
60 B=CB
70 FOR I=0 TO 15
80 T=A*A-B*B+CA
90 B=2*A*B+CB
100 A=T
110 IF (A*A+B*B)>4 THEN GOTO 200
120 NEXT I
130 PRINT " ";
140 GOTO 210
200 IF I>9 THEN I=I+7
205 PRINT CHR$(48+I);
210 NEXT X
220 PRINT
230 NEXT Y

000000011111111111111111122222233347E7AB322222111100000000000000000000000000000
000001111111111111111122222222333557BF75433222211111000000000000000000000000000
000111111111111111112222222233445C      643332222111110000000000000000000000000
011111111111111111222222233444556C      654433332211111100000000000000000000000
11111111111111112222233346 D978 BCF    DF9 6556F4221111110000000000000000000000
111111111111122223333334469                 D   6322111111000000000000000000000
1111111111222333333334457DB                    85332111111100000000000000000000
11111122234B744444455556A                      96532211111110000000000000000000
122222233347BAA7AB776679                         A32211111110000000000000000000
2222233334567        9A                         A532221111111000000000000000000
222333346679                                    9432221111111000000000000000000
234445568  F                                   B5432221111111000000000000000000
                                              864332221111111000000000000000000
234445568  F                                   B5432221111111000000000000000000
222333346679                                    9432221111111000000000000000000
2222233334567        9A                         A532221111111000000000000000000
122222233347BAA7AB776679                         A32211111110000000000000000000
11111122234B744444455556A                      96532211111110000000000000000000
1111111111222333333334457DB                    85332111111100000000000000000000
111111111111122223333334469                 D   6322111111000000000000000000000
11111111111111112222233346 D978 BCF    DF9 6556F4221111110000000000000000000000
011111111111111111222222233444556C      654433332211111100000000000000000000000
000111111111111111112222222233445C      643332222111110000000000000000000000000
000001111111111111111122222222333557BF75433222211111000000000000000000000000000
000000011111111111111111122222233347E7AB322222111100000000000000000000000000000
boards/sbc/z180_mark_iv/z180_mark_iv.txt · Last modified: 2019/05/05 10:07 by b1ackmai1er
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