Mitsubishi Electric Apricot Owner's Handbook Manual page 159

T e c h n i c a l I n f o r m a t i o n
Control Register 122h (R/W)
This contains miscellaneous control bits. All bits are cleared on reset.
Bits Function
7:6 IRQ select for COM port:
00 = No IRQ selected
01 = IRQ10
10 = IRQ14
11 = IRQ15
5 Management UART address: 0=COM3: 1=COM4
4 Enable DOS Flash/SRAM decode: 1=enable
3 Enable DOS Flash write: 1=enable
2 Enable BIOS Flash write: 1=enable
1:0 IRQ select for Diagnostic UART:
00 = No IRQ selected
01 = IRQ10
10 = IRQ14
11 = IRQ15
SRAM Page Register 123h (write only)
This controls the SRAM paging. All bits are cleared on reset.
Bits Function
7:2 n/a
1:0 SRAM page (0
Status Register
This register contains miscellaneous control bits. All bits are cleared on
reset.
Bits Function
7:4 4-way switch pack : read only, 0 = on
3 Flash RDY line : read only, 1 = ready
2 n/a
DiagP, IOCHCK# line : read only
DiagP NMI# line : read only
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