github.com/rzzzwilson.pymlac
1
0
Fork 0
mirror of https://github.com/rzzzwilson/pymlac.git synced 2025-06-10 09:32:41 +00:00
Code Issues Releases Wiki Activity

New code to test PTR and PTP devices

Browse Source
This commit is contained in:
Ross Wilson
2015-06-13 19:10:11 +07:00
parent 28853259bd
commit 38dfba80f0
3 changed files with 208 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
pymlac/DisplayCPU.py
View File

@@ -26,15 +26,16 @@ DIB = 0 # display CPU ???
DX = 0 # display CPU draw X register
DY = 0 # display CPU draw Y register
# state variables
mode = MODE_NORMAL
running = False
# global state variables
Mode = MODE_NORMAL
Running = False
def init():
mode = MODE_NORMAL
running = False
global Mode, Running
Mode = MODE_NORMAL
Running = False
def DEIMdecode(byte):
"""Decode a DEIM byte"""
@@ -57,6 +58,7 @@ def DEIMdecode(byte):
def doDEIMByte(byte):
global DPC, DX, DY, DRSindex
global Mode
if byte & 0x80: # increment?
prevDX = DX
@@ -73,7 +75,7 @@ def doDEIMByte(byte):
# display.draw(0, prevDX, prevDY, DX, DY)
else: # micro instructions
if byte & 0x40:
mode = MODE_NORMAL
Mode = MODE_NORMAL
if byte & 0x20: # DRJM
if DRSindex <= 0:
Trace.comment('\nDRS stack underflow at display address %6.6o'
@@ -92,18 +94,19 @@ def doDEIMByte(byte):
def execute_one_instruction():
global DPC
global Mode
if not running:
if not Running:
Trace.dtrace('')
return 0
instruction = Memory.get(DPC, 0)
DPC = MASK_MEM(DPC + 1)
if mode == MODE_DEIM:
if Mode == MODE_DEIM:
Trace.trace(DEIMdecode(instruction >> 8) + '\t')
doDEIMByte(instruction >> 8)
if mode == MODE_DEIM:
if Mode == MODE_DEIM:
Trace.trace(DEIMdecode(instruction & 0xff) + '\t')
doDEIMByte(instruction & 0xff)
else:
@@ -114,14 +117,14 @@ def execute_one_instruction():
address = instruction & 007777
if opcode == 000: return page00(instruction)
elif opcode == 001: return i_DLXA(address)
elif opcode == 002: return i_DLYA(address)
elif opcode == 003: return i_DEIM(address)
elif opcode == 004: return i_DLVH(address)
elif opcode == 005: return i_DJMS(address)
elif opcode == 006: return i_DJMP(address)
elif opcode == 007: return illegal(instruction)
else: illegal(instruction)
elif opcode == 001: return i_DLXA(address)
elif opcode == 002: return i_DLYA(address)
elif opcode == 003: return i_DEIM(address)
elif opcode == 004: return i_DLVH(address)
elif opcode == 005: return i_DJMS(address)
elif opcode == 006: return i_DJMP(address)
elif opcode == 007: illegal(instruction)
else: illegal(instruction)
def illegal(instruction=None):
if instruction:
@@ -133,7 +136,7 @@ def illegal(instruction=None):
sys.exit(0)
def ison():
return running
return Running
def i_DDXM():
global DX
@@ -148,13 +151,15 @@ def i_DDYM():
Trace.dtrace('DDYM')
def i_DEIM(address):
mode = MODE_DEIM
global Mode
Mode = MODE_DEIM
Trace.deimtrace('DEIM', DEIMdecode(address & 0377))
doDEIMByte(address & 0377)
return 1
def i_DHLT():
running = False
Running = False
Trace.dtrace('DHLT')
def i_DHVC():
@@ -315,11 +320,11 @@ def page00(instruction):
return 1
def start():
global running
global Running
running = True
Running = True
def stop():
global running
global Running
running = False
Running = False

9
pymlac/Ptp.py
View File

@@ -21,6 +21,7 @@ motor_state = MOTOR_OFF
device_state = DEVICE_NOT_READY
filename = None
open_file = None
cycle_count = None
def init():
@@ -50,27 +51,27 @@ def dismount():
open_file = None
def start():
global motor_state, device_state, filename, open_file
global motor_state, device_state, cycle_count
motor_state = MOTOR_ON
device_state = DEVICE_NOT_READY
cycle_count = DEVICE_NOT_READY_CYCLES
def stop():
global motor_state, device_state, filename, open_file
global motor_state, device_state
motor_state = MOTOR_OFF
device_state = DEVICE_NOT_READY
def write(ch):
global motor_state, device_state, filename, open_file
global device_state, open_file, cycle_count
device_state = DEVICE_NOT_READY
cycle_count = DEVICE_NOT_READY_CYCLES
open_file.write(ch)
def tick(cycles):
global motor_state, device_state, filename, open_file
global motor_state, device_state, open_file, cycle_count
if motor_state == MOTOR_OFF or not open_file:
device_state = DEVICE_NOT_READY

173
pymlac/test_PTR_PTP.py Normal file
View File

@@ -0,0 +1,173 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Test the pymlac papertape reader code.
Usage: test_PTR_PTP.py <options>
where <filename> is a papertape file (*.ptp)
and <options> is zero or more of:
-h print this help and stop
"""
# We exercise the papertape reader module by:
# 1. manipulating the device to test error conditions
# 2. writing test *.ptp files which we mount and read
import Ptr
import Ptp
# module global constants
PtrFilename = '_#PTR#_.ptp'
PtpFilename = '_#PTP#_.ptp'
def read_no_tape():
"""Read from device with no tape mounted."""
# read before turning on
byte = Ptr.read()
if byte != 0377:
print('Error')
Ptr.tick(1000000) # wait a long time
byte = Ptr.read()
if byte != 0377:
print('Error')
# turn device on, still no tape
Ptr.start()
Ptr.tick(1000000) # wait a long time
byte = Ptr.read()
if byte != 0377:
print('Error')
Ptr.tick(1000000) # wait a long time
byte = Ptr.read()
if byte != 0377:
print('Error')
Ptr.stop()
def create_papertape(filename):
"""Create a PTP file."""
# create a test papertape
with open(filename, 'wb') as fd:
# leader
for _ in range(128):
fd.write(chr(0))
for v in range(1, 256):
fd.write(chr(v))
# trailer
for _ in range(128):
fd.write(chr(0))
def create_papertape_ptp(filename):
"""Create a PTP file using the Ptp device."""
Ptp.mount(filename)
Ptp.start()
# leader
for _ in range(128):
while not Ptp.ready():
Ptp.tick(1)
Ptp.write(chr(0))
while Ptp.ready():
Ptp.tick(1)
# body
for v in range(1, 256):
while not Ptp.ready():
Ptp.tick(1)
Ptp.write(chr(v))
while Ptp.ready():
Ptp.tick(1)
# trailer
for _ in range(128):
while not Ptp.ready():
Ptp.tick(1)
Ptp.write(chr(0))
while Ptp.ready():
Ptp.tick(1)
Ptp.stop()
Ptp.dismount()
def read_tape(filename):
"""Create tape and read it."""
# now mount and read tape
Ptr.mount(filename)
Ptr.start()
# read leader
byte = None
count = 0
while True:
while not Ptr.ready():
Ptr.tick(1)
byte = Ptr.read()
while Ptr.ready():
Ptr.tick(1)
if byte != 0:
break
count += 1
print('%d bytes of leader' % count)
# read body, already read first byte
byte = None
count = 1
while True:
while not Ptr.ready():
Ptr.tick(1)
byte = Ptr.read()
while Ptr.ready():
Ptr.tick(1)
if byte == 0:
break
count += 1
print('%d bytes of body' % count)
# read trailer, already read first byte
byte = None
count = 1
while True:
while not Ptr.ready():
Ptr.tick(1)
byte = Ptr.read()
if byte != 0:
break
count += 1
while Ptr.ready():
Ptr.tick(1)
Ptr.stop()
print('%d bytes of trailer' % count)
def main():
"""Test the papertape reader."""
Ptr.init()
Ptp.init()
read_no_tape()
create_papertape(PtrFilename)
read_tape(PtrFilename)
create_papertape_ptp(PtpFilename)
read_tape(PtpFilename)
################################################################################
if __name__ == '__main__':
main()