ZX65: Simulating a Micro					Page T1


				*** TABLE 1 ***

	Functions which ZX65 requires of the host system, and their
	locations within the interpreter.
	-----------------------------------------------------------

	FUNCTION					ADDRESS
	--------					-------

1.	Test console input status --------------------- 7A2EH

2.	Get single character from console ------------- 7A2BH

3.	Send single character to console -------------- 7A28H

4.	Select disk drive (A or B) -------------------- 7A34H

5.	Home R/W head of selected drive --------------- 7A31H

6.	Set disk transfer buffer address -------------- 7A3DH

7.	Set sector number for next disk access -------- 7A37H

8.	Set track number for next disk access --------- 7A3AH

9.	Read one sector from selected drive ----------- 7A40H

10.	Write one sector to selected drive ------------ 7A43H







ZX65: Simulating a Micro					Page T2


				*** TABLE 2 ***

	6502/Z80 parameter passing to/from user subroutines.
	----------------------------------------------------


		6502 Register	Passed as	Z80 Register
		-------------			------------

		Accumulator ------------------- Accumulator

		X Index ----------------------- B Register

		Y Index ----------------------- C Register




ZX65: Simulating a Micro					Page T3

				*** TABLE 3 ***


	Locations for "BRK" vector and user subroutine table.
	-----------------------------------------------------

	Description		Address of vector/jump
	-----------		----------------------

	BRK Vector ------------ 7A55H

	User 0 ----------------	7A46H

	User 1 ---------------- 7A49H

	User 2 ---------------- 7A4CH

	User 3 ---------------- 7A4FH

	User 4 ---------------- 7A52H




ZX65: Simulating a Micro					Page T4


				*** TABLE 4 ***


	A command summary for ZX65 (in alphabetical order)
	--------------------------------------------------


	COMMAND		FUNCTION
	-------		--------

	C ------------- CPU register display & modify

	D ------------- Directory display of ZX65 files on drive B
			Format: FILNAM.TYP    LOAD ADDR    # RECORDS

	E ------------- Examine block of memory. System will prompt
			for starting address and number of bytes.

	G ------------- Go execute 6502 program per Current Program Counter.

	I ------------- Initialize a fresh disk on drive B. (Must be for-
			matted.) System will prompt for verification.

	K ------------- Kill a ZX65 file on drive B. Similar to CP/M
			ERA. System will prompt for file name.

	L ------------- Load a ZX65 file from drive B. System will prompt
			for file name.

	M ------------- Memory substitution/modification. Use to view seq-
			uential memory locations and update if desired.
			System will prompt for address. Mode will then
			continue in effect until a '.' is typed.

	R ------------- Load and run a ZX65 file from drive B, starting
			at the address specified in the directory. (Must
			be an executable 6502 program.)  System will
			prompt for file name.

	S ------------- Save a ZX65 file on drive B. System will prompt
			for file name, starting address, and number of
			bytes.

	T ------------- Trace several 6502 instructions with display
			following each step.  System will prompt for
			desired number of steps.

	'SPACE' ------- Single-step command. System will execute one 6502
			instruction, display the results, and stop.