Eshs

From DaphneWiki

Revision as of 20:38, 13 August 2020 by Matt (Talk | contribs)
Jump to: navigation, search

Contents

Esh's Aurunmilla

Memory Map

Address Range Description
0x0000-0x1FFF ROM H8
0x2000-0x3FFF ROM F8
0x4000-053FFF ROM E8
0x6000-073FFF ROM D8
0x8000-0x9FFF ROM C8
0xE000-0xE7FF CPU RAM
0xF000-0xF7FF Unknown (Daphne says that this is video hardware)

Z80 Port Map

Address Range Direction Description
0xF0 In Control panel input. Only lower 6 data bits are used.
0xF1 In Control panel input. Only lower 6 data bits are used.
0xF2 In Control panel input. Only lower 6 data bits are used.
0xF3 In Control panel input. Only lower 6 data bits are used.
0xF4 In/Out LD-V1000 data. Writing queues a command to be sent on the next command strobe. Reading reads the most recent byte received during last the status strobe.
0xF5 Out Misc value?
0xFE Out 0 clears IRQ latch. 1 allows IRQs to be triggered.
0xFF Out 0 clears NMI latch. 1 allows NMIs to be triggered.

Interrupts

NMI: Caused by LD-V1000 status strobe going low (becoming active)

IRQ: Caused by D2 output (pin 10) on vertical PROM (C6) transitioning from 0 to 1.

Personal tools