Eshs

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(Z80 Port Map)
m (Z80 Port Map)
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|0 disables action button lamp.  1 enables.
|0 disables action button lamp.  1 enables.
|-
|-
-
|0xF8
+
|0xFB
|Out
|Out
|0 disables joystick lamp.  1 enables.
|0 disables joystick lamp.  1 enables.

Revision as of 21:20, 16 August 2020

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?
0xF8 Out 0 disables start button lamp. 1 enables.
0xFA Out 0 disables action button lamp. 1 enables.
0xFB Out 0 disables joystick lamp. 1 enables.
0xFE Out 0 forces IRQ' line to be high (disabled). 1 allows IRQs to be triggered normally.
0xFF Out 0 forces NMI' line to be high (disabled). 1 allows NMIs to be triggered normally.

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.

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