Difference between revisions of "LB-68B50-02"

Revision as of 12:05, 20 September 2024

Features

Serial/Parallel I/O Card
68B50 UART
1.8432 MHz oscillator
- Baud Rate Clock (115,200 baud oscillator)
Control PLD
100x50mm card

Design

ACIA

68B50 UART
Baud Rate Clock (115,200 baud oscillator)

PLD

Customize PLD per CPU type and to match memory map
ATF16V8B part
TL866ii Plus Programmer

LB-68B50-02_6XXX_PLD Listing

6XXX (6502, 6802, 6809 specific)

Name       LB-68B50-02_6XXX_PLD;
Partno     ATF16V8B;
Date       09/20/24;
Revision   01;
Designer   DOUG G;
Company    LAND BOARDS LLC;
Assembly   LB-68B50-02_6XXX_U2;
Location   Rustbelt, US;
Device     G16V8;

/*
	68B50 Control for LB-6809-01, LB-6802-01, and LB-65CXX CPU boards
	0x8000-0xBFFF - 16KB I/O space
*/

/* Control inputs */
PIN    1   = CPUA15;
PIN    2   = CPUA14;
PIN    3   = CPUA13;
PIN    4   = CPUA12;
PIN    5   = CPUA11;
PIN    6   = CPUA10;
PIN    7   = CPUA1;
PIN    8   = CPUA0;
PIN    9   = !IOCS;	/* IOCS is IO space decoded on all CPU cards 	*/
PIN    11   = VDA;	/* Not used in any version	*/
PIN    12   = VPB;	/* VPB is enable on 6802, 6809 AND 6502 (Rev 2 rwk) CPUs */
PIN    14   = !IORQ;	/* IORQ* is enable on Z80 cards	*/

/* Address Decode and Chip Select outputs */
PIN    16  = ACIACS1;
PIN    17  = ACIACS0;
PIN    18  = ACIARS;
PIN    19  = ACIAE;

ACIACS1 = CPUA15 & !CPUA14 & IOCS;

ACIACS0 = CPUA15 & !CPUA14 & IOCS;

ACIARS = CPUA0;

ACIAE = CPUA15 & !CPUA14 & IOCS & VPB;

LB-68B50-02_Z80_PLD PLD Listing

Name       LB-68B50-02_Z80_PLD;
Partno     ATF16V8B;
Date       09/19/24;
Revision   01;
Designer   DOUG G;
Company    LAND BOARDS LLC;
Assembly   LB-6850-02_U2;
Location   Rustbelt, US;
Device     G16V8;

/*
	68B50 Control for Z80 CPU board
*/

/* Control inputs */
PIN    1   = CPUA15;
PIN    2   = CPUA14;
PIN    3   = CPUA13;
PIN    4   = CPUA12;
PIN    5   = CPUA11;
PIN    6   = CPUA10;
PIN    7   = CPUA1;
PIN    8   = CPUA0;
PIN    9   = !IOCS;
PIN    11  = VDA;
PIN    12  = VPB;
PIN    13  = !IORQ;

/* Address Decode and Chip Select outputs */
PIN    16  = ACIACS1;
PIN    17  = ACIACS0;
PIN    18  = ACIARS;
PIN    19  = ACIAE;

ACIACS1 = IOCS & IORQ;

ACIACS0 = IOCS & IORQ;

ACIARS = CPUA0;

ACIAE = IOCS & IORQ;