Getting Loaded (2:2)
Clarifications offered by the author include:
1) Check your tape recorder grounding; you may have to reverse the diode.
2) Parts list: LED #276-042; diode #276-1114.
The Game of Life Revisited (2:1)
The author has supplied the following changes which should make both versions work.
p. 20, col. 3:
LET A=USR(16427)
p. 21, Fig. 3.
1) Hex address column: the instructions after 40FD repeat Fig. 2.
2) Add the following instructions:
40AB: CD F9 40 CALL TEST
40AE: DD 7E 22 LD A,(IX+34)
40B1: CD F9 40 CALL TEST
40B4: DD 7E 00 LD A,(IX)
3) Correct the following instructions:
40DF: DD 36 00 00 LD (IX),00
40E5: DD 36 00 80 CELL: LD (IX),128
p. 25, Fig. 7:
4115: Correct hex format to 28 0E
Already noted in 2:2:
p. 21, Larger Field:
3) POKE 16435,20
p. 21, Fig. 5:
240 IF A<1 OR A>300...
MicroAce Video Upgrade (2:1), p. 27.
The author has supplied the following additional information:
1) 1st col., last sentence: pin 2 should be “pin 1.”
2) Several readers have wondered about connection “G” on the board. The instructions can be interpreted to indicate a connection between it and both IC 21 pin 1 and the base resistor of the transistor buffer used on VHF modulator equipped ZX80 computers. Connect G as follows:
a) UHF modulators: to IC 21 pin 1.
b) VHF modulators: to the base resistor of the buffer only.